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Question Bank

OPTCL JOMT Electrical Exam - English

Duration: 180 · Questions: 200 · Max Marks: 200 · Language: 3

View OPTCL JOMT 2026 Exam Page

Electrical

1
When a very small amount of higher conducting metal is added to a conductor, its conductivity will 
  1. A.increase
  2. B. decrease
  3. C.remain the same 
  4. D.increase or decrease depending on the impurity
2
An electrically balanced atom has 30 protons in its nucleus and 2 electrons in its outermost shell. The materials made of such atom is
  1. A.a conductor
  2. B.an insulator
  3. C.a semiconductor 
  4. D.a superconductor
3
The temperature coefficient of resistance of a doped semiconductor is
  1. A.always positive
  2. B.always negative
  3. C.zero 
  4. D.positive or negative depending upon the level of doping 
4
In the slice processing of an integrated circuit
  1. A.components are formed in the areas where silicon dioxide remains
  2. B.components are formed in the areas where silicon dioxide has been removed
  3. C.the diffusing elements diffuse through silicon dioxide 
  4. D.only on diffusion process is used 
5
Permanent magnet loses the magnetic behaviour when heated because of
1. atomic vibration
2. dipole vibration
3. realignment of dipoles
Which of the above are correct?
  1. A.1  and 2 only 
  2. B.1 and 3 only
  3. C.1, 2 and 3         
  4. D.2 and 3
6
A Zener regulator has an input voltage varying between 20 V and 30 V. The desired regulated voltage is 12 V, while the load varies between 140  and 10k  The maximum resistance in series with the unregulated source and Zener diode would be
  1. A.3.3
  2. B.6.6
  3. C.36.6
  4. D.93.3
7
A short in any type of circuit (series, parallel or combination) causes the total circuit
1. resistance to decrease
2. power to decreases
3. current to increase
Which of the above are correct?
  1. A.2  and 3 
  2. B.2 and 4
  3. C.1 and 4 
  4. D.1 and 3 
8
An air-cored solenoid of 250 turns has a cross-sectional area A = 80 cm2 and length l = 100 cm. The value of its inductance is
  1. A.0.425 mH          
  2. B.0.628 mH
  3. C.0.751 mH 
  4. D.0.904 mH
9
The current in a coil changes uniformly from 10 A to 1 A in half a second. A voltmeter connected across the coil gives a reading of 36 V. The self-inductance of the coil is
  1. A.0.5 H 
  2. B.1 H
  3. C.2 H       
  4. D.4 H 
10
In a mutually coupled circuit, the primary current is reduced from 4A to zero in 10 s.  A voltage of 40000 V is observed across the secondary. The mutual inductance between the coils is
  1. A.100 H 
  2. B.10 H
  3. C.0.1 H 
  4. D.0.01 H 
11
A semiconductor differs from a conductor in that it has
  1. A.Only one path for the free electrons in the valence band
  2. B.Only one path for holes in the conduction band
  3. C.Two paths followed by free electrons and holes, one an ordinary path in the conduction band and the other one an extraordinary path in the valence band, respectively 
  4. D.Two paths followed by free electrons and holes, one an extraordinary path in the conduction band and the other one an ordinary path in valence band, respectively 
12
Which of the following circuits is used for converting a sine wave into a square wave?
  1. A.Monostablemultivibrator
  2. B.Bistablemultivibrator
  3. C.Schmitt trigger circuit 
  4. D.Darlington complementary pair
13
Which of the following elements of electrical engineering cannot be analyzed using Ohm’s law ?
  1. A.Capacitors
  2. B.​Inductors
  3. C.Transistors
  4. D.Resistance
14
Consider the following statements: A power supply uses bridge rectifier with a capacitor input filter. If one of the diodes is defective, then
1. The dc load voltage will be lower than its expected value
2. Ripple frequency will be lower than its expected value
3. The surge current will increase considerably
Which of the above statements are correct?
  1. A.1  and 2 only 
  2. B.1 and 3 only
  3. C.2 and 3 only 
  4. D.1, 2 and 3 
15
Three identical amplifiers each having a voltage gain of 50 are cascaded. The open loop voltage gain of the combined amplifier is
  1. A.71 dB 
  2. B.82 dB 
  3. C.91 dB 
  4. D.102 dB 
16
A clamper circuit
1. Adds or subtracts a dc voltage to or from a waveform
2. Does not change the shape of the waveform
Which of the above statements are correct? 
  1. A.1 only 
  2. B.2 only 
  3. C.Both 1 and 2 
  4. D.Neither 1 nor 2 
17
If a carrier of 100% modulated AM is suppressed before transmission, the power saving is nearly
  1. A.50% 
  2. B.67%
  3. C.100% 
  4. D.125%
18
When the modulating frequency is doubled the modulation index is halved and the modulating voltage remains constant. This happens when the modulating system is
  1. A.AM 
  2. B.PM
  3. C.FM       
  4. D.Delta Modulation
19
The four basic elements in a PLL are loop filter, loop amplifier, VCO and
  1. A.Up converter
  2. B.Down converter
  3. C.Phase detector
  4. D.Frequency multiplier
20
In a frequency modulated (FM) system, when the audio frequency is 500 Hz and audio frequency voltage is 2.4 V, the frequency deviation is 4.8 kHz. If the audio frequency voltage is now increased to 7.2 V then what is the new value of deviation?
  1. A.0.6 kHz 
  2. B.3.6 kHz
  3. C.12.4 kHz 
  4. D.14.4 kHz
21
If a square matrix of order 100 has exactly 15 distinct eigenvalues, then the degree of the minimum polynomial is 
  1. A.At least 15 
  2. B.At most 15 
  3. C.Always 15 
  4. D.Exactly 100
22
For high speed reading and storing of information in a computer, the core shall be of 
  1. A.Ferrite 
  2. B.Piezoelectric 
  3. C.Pyroelectric 
  4. D.Ferromagnetic above 768°C
23
Soft magnetic materials should have 
  1. A.Large saturation magnetization and large permeability 
  2. B.Low saturation magnetization and large permeability 
  3. C.Large saturation magnetization and low permeability 
  4. D.Low saturation magnetization and low permeability 
24
Orbital magnetic moment of an electron, in an atom, is of the order of 
  1. A.0.1 Bohr magneton 
  2. B.1.0 Bohr magneton 
  3. C.10 Bohr magneton 
  4. D.100 Bohr magneton
25
When the temperature of a ferromagnetic material exceeds the Curie temperature, it behaves similar to a 
  1. A.Diamagnetic material 
  2. B.Ferrimagnetic material 
  3. C.Paramagnetic material 
  4. D. Antiferromagnetic material
26
What is the correct sequence of the following materials in ascending order of their resistivity ?
1. Iron
2. Silver
3. Constantan
4. Mica
5. Aluminium
Select the correct answer using the codes given below : 
  1. A.2, 5, 1, 3 and 4 
  2. B.4, 5, 3, 1 and 2 
  3. C.2, 3, 1, 5 and 4 
  4. D.4, 5, 1, 3 and 2
27
In the first Cauer network, with a pole at infinity, the first element must be
  1. A.Series capacitor 
  2. B.Series inductor 
  3. C.Shunt capacitor 
  4. D.Shunt inductor
28
The total magnetic moment
1. is called saturation magnetization.
2. depends on the number of magnetic dipoles per unit volume, the instant electric current and the area of the current loop.
Which of the above statements is/are correct ? 
  1. A.1 only 
  2. B.2 only 
  3. C.Both 1 and 2 
  4. D.Neither 1 nor 2
29
Susceptibility of a diamagnetic material is 1. Negative
2. Positive
3. Dependent on the temperature
4. Independent of the temperature 
  1. A.1 and 2 only 
  2. B.1 and 3 only 
  3. C.2 and 3 only      
  4. D.1, 2 and 3
30
Superconductivity is a material property associated with 
  1. A.Changing shape by stretching 
  2. B.Stretching without breaking 
  3. C.A loss of thermal resistance 
  4. D.A loss of electrical resistance
31
Assuming both the voltage sources are in phase, the value of R for which maximum power is transferred from circuit A to circuit B is

                 
  1. A.0.8 Ω
  2. B.1.4 Ω
  3. C.2 Ω
  4. D.2.8 Ω
32
For the intrinsic gallium-arsenide, the conductivity at room temperature 25°C is 10-6 (ohm-m)-1, the electron and hole nobilities are 0.85 m2/V-s and 0.04 m2/V-s respectively. What is the intrinsic carrier concentration at the room temperature?
  1. A.7.0 × 1012 m-3
  2. B.7.0 × 10-12 m-3
  3. C.7.0 × 10-12 m3
  4. D.7.0 × 1012 m3
33
The resistivity of intrinsic germanium at 30°C is 0.46 –m. What is the intrinsic carrier density at 30°C if the electron mobility is 0.38 m2/V-s and the hole mobility is 0.18 m2/V-s?
  1. A.9.2 × 105/m3
  2. B.2.77 × 103/m3
  3. C.2.43 × 1019/m3
  4. D.8.9 × 1012/m3
34
Heat conduction in a semiconductor takes place
  1. A.By the mobility of the carriers
  2. B.Due to energy gap between conduction band and valency band
  3. C.By the holes and thermal vibrations of atoms
  4. D.By the electrons and thermal vibrations of atoms
35
Brewster angle is the angle when a wave is incident on the surface of a perfect dielectric at which there is no reflected wave and the incident wave is
  1. A.Parallel polarized
  2. B.Perpendicularly polarized
  3. C.Normally polarized
  4. D.None of the above
36
An electrical breakdown of a p-n junction occurs if
  1. A.Forward voltage increases up to the rating
  2. B.Reverse voltage increases beyond the rating
  3. C.Forward voltage decreases below the rating
  4. D.Reverse voltage decreases below the rating
37
The chief deterrent to the widespread application of superconducting materials is
  1. A.Very difficult to form, machine or case
  2. B.The difficult in attaining and maintaining extremely low temperature
  3. C.The poor strength-to-weight ratio
  4. D.The lower oxidation rate at elevated temperatures
38
Which one of the following properties is not observed in the carbon nanotubes ?
  1. A.High stiffness and strengths
  2. B.Low densities
  3. C.Unusual electrical property
  4. D.Non-ductile
39
The evidence for the importance of electron-phonon interaction in super-conductors comes from
  1. A.Meissner effect
  2. B.Josephson effect
  3. C.Isotope effect
  4. D.x quantization experiments
40
Which one of the following materials is used for cable insulation ?
  1. A.Phenol formaldehyde
  2. B.Polytetrafluoroethylene
  3. C.Polyvinyl chloride
  4. D.Acrylonitrile butadiene styrene
41
For high speed reading and storing of information in a computer, the material used is
  1. A.Ferrite
  2. B.Piezoelectric
  3. C.Pyroelectric
  4. D.Ferromagnetic above 768°C
42
The temperature above which an anti-ferromagnetic material becomes paramagnetic is called
  1. A.Peak temperature
  2. B.Neel temperatur
  3. C.Critical temperature
  4. D.Weiss temperature
43
Which effect is the converse of Peltier effect ?
  1. A.Seeback effect
  2. B.Thomson effect
  3. C.Hall effect
  4. D.Joule effect
44
Magnetic materials which may be readily magnetized in either direction are
  1. A.Soft magnetic materials
  2. B.Hard magnetic materials
  3. C.High eddy current loss materials
  4. D.High hysteresis loss materials
45
Consider the following statements regarding a ferromagnetic material:
1.Below the ferromagnetic Curie temperature, the ferromagnetic materials exhibit hysteresis effect.
2.The coercive force is the filed required to reduce the flux density to zero. 
Which of the above statements is/are correct?
  1. A.Both 1 and 2
  2. B.Neither 1 nor 2
  3. C.1 only
  4. D.2 only
46
The impact ionization phenomenon in semiconductor may be viewed as the reverse process of
  1. A.Radiative recombination
  2. B.Auger recombination
  3. C.Surface recombination
  4. D.Shockley-Read-Hall recombination
47
Refractive index of a slice glass can be reduced by doping it with tiny amount of
  1. A.GeO2
  2. B.B2O3
  3. C.P2O5x
  4. D.Al2O3
48
If a diameter of a copper wire is increased by two times keeping its terminal voltage same, then the drift velocity will
  1. A.Become twice
  2. B.Become half
  3. C.ecome four times
  4. D.Remain unchanged
49
In an induction type energy meter, the steady speed attained by the rotating disc is
1.Proportional to the deflecting torque.
2.Proportional to the resistance of the path of eddy currents.
3.Inversely proportional to the effective readings of disc from its axis.
4.Inversely proportional to the square of brake magnetic flux. 
Which of the above are correct?
  1. A.1, 2 and 3 only
  2. B.1, 2 and 4 only
  3. C.2, 3 and 4 only
  4. D.1, 2, 3 and 4
50
If ‘KCLFTSB’ stands for ‘best of  luck’ and ‘SHSWDG’ stands for ‘good wishes’, which of the following indicates ‘ace the exam’?
  1. A.MCHTX
  2. B.MXHTC
  3. C.XMHCT
  4. D.XMHTC
51
Consider  the following statements associated with the basic electrostatic properties of ideal conductors:
1.The resultant field inside is zero.
2.The net charge density in the interior is zero.
3.Any net charges reside on the surface.
4.The surface is always equipotential.
5.The field just outside is zero. 
Which of the above statements are correct?
  1. A.1, 2, 3 and 4
  2. B.3, 4 and 5 only
  3. C.1, 2 and 3 only
  4. D.2 and 3 only
52
A semiconductor device made out of a material having very high temperature coefficient of resistance is
  1. A.Transistor
  2. B.Varistor
  3. C.Thyristor
  4. D.Thermistor
53
The electrical conductivity of a semiconductor increases with increase in temperature because
  1. A.The carrier concentration increases
  2. B.The mobility of carrier increases
  3. C.Both carrier concentration and mobility increases
  4. D.The band gap decreases
54
Which of the following are associated with soft superconductors?
1.Silsbee’s rule
2.Meissner effect
3.Faraday rotation
4.Curie-Weiss law
  1. A.2, 3 and 4
  2. B.1 and 3 only
  3. C.1 and 2 only
  4. D.2 and 3 only
55
In a two-channel oscilloscope operating in x-y mode, two in-phase 50 Hz sinusoidal waveforms of equal amplitude are fed to the two channels. What will be the resultant pattern on the screen?
  1. A.An ellipse
  2. B.A parabola
  3. C.Straight line inclined at 45 with respect to x-axis
  4. D.A circle
56
Materials, whose resistivity at very low temperature plunges from a finite value to zero and remains there upon further cooling, are known as
  1. A.
    Ferromagnetic materials
  2. B.
    High-energy hard magnetic materials
  3. C.
    Superconductors
  4. D.
    Ferromagnetic materials
57
In a superconductor, is the temperature is decreased below its critical temperature, the value of critical magnetic field will
  1. A.
    Increase
  2. B.
    Decrease
  3. C.
    Not change
  4. D.
    Increase or decrease depending on the superconductor material
58
The imaginary part of dielectric constant determines
  1. A.
    Component of current which is in phase with the applied field
  2. B.
    Component of energy absorbed per m3
  3. C.
    Amount of applied field
  4. D.
    Component of voltage which is in phase with the applied field
59
Direction: Each of the items consists of two statements, one labeled as the ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answers to these items using the codes given below
  1. A.Statement (I):Hard magnetic materials are used for making permanent magnets.
    Statement (II):
    Hard magnetic materials have relatively small and narrow hysteresis loop.
  2. B.Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)
  3. C.
    Both Statement (I) and Statement (II) are individually true and Statement (II) is NOT the correct explanation of Statement (I)
  4. D.
    Statement (I) is true but Statement (II) is false
  5. E.
    Statement (I) is false but Statement (II) is true 
60
In 8085A microprocessor, the operation performed by the instruction LHLD 2100 H is                                    
  1. A.(H) ← 21 H, (L) ←00 
  2. B.(H) ← M (2100 H), (L) ←M(2101H)
  3. C.(H) ← M (2100 H), (L) ←M(2100H)
  4. D.(H) ← 00H, (L) ←21H                                                 
61
If the magnetic susceptibility of a specimen is small and positive, the specimen is
  1. A.
    Diamagnetic
  2. B.
    Paramagnetic
  3. C.
    Ferromagnetic
  4. D.
    Non-magnetic
62
Manganese ferrite is a 1 : 1 mixture of
  1. A.
    Manganese nitride and iron oxide
  2. B.
    Manganese oxide and iron nitride
  3. C.
    Manganese nitride and iron sulphide
  4. D.
    Manganese oxide and iron sulphide 
63
When a ferromagnetic substance is magnetized, small changes in dimensions occur. Such a phenomenon is known as
  1. A.
    Magnetic hysteresis
  2. B.
    Magnetic expansion
  3. C.
    Magnetostriction
  4. D.
    Magneto-calorisation
64
In ferromagnetic , anti-ferromagnetic and ferromagnetic materials, the atomic thermal motions counteract the coupling forces between the adjacent atomic dipole moments, thereby causing
  1. A.
    Some dipole misalignment regardless of whether an external field is present
  2. B.
    Increase in dipole alignment regardless of whether an external field is present
  3. C.
    No effect on dipole alignment
  4. D.
    Atoms tend to de-randomize the direction of moments 
65
The Hall effect voltage in intrinsic silicon
  1. A.
    Is positive
  2. B.
    Is zero
  3. C.
    Is negative
  4. D.
    Changes its sign based on application of magnetic field
66
Most outstanding property of indium antimonide is
  1. A.A very wide range gap
  2. B.
    High resistivity at room temperature
  3. C.
    High carrier mobility
  4. D.
    Very low conductivity at room temperature
67
Which of the following semiconducting compounds is used in photoconductive devices?
  1. A.
    Caesium antimonide
  2. B.
    Barium oxide
  3. C.
    Lead sulphide
  4. D.
    Zinc oxide
68
Consider the following transducers:
1.LVDT
2.Piezoelectric
3.Thermocouple
4.Photovoltaic cell
Which of the above are active transducers?
  1. A.1, 2 and 3
  2. B.
    1, 2 and 4
  3. C.
    2 and 3 only
  4. D.
    2, 3 and 4
69
Consider the following statements regarding magnetic materials:
1.A diamagnetic material has no permanent dipole
2.Paramagnetic material has anti-parallel orientation of equal moments with neighboring dipoles
3.Ferrimagnetic material has anti parallel orientation of unequal moments between neighboring dipoles
4.Anti-ferromagnetic material has negligible interaction between neighboring dipoles 
Which of these statements are correct?
  1. A.1 and 2
  2. B.
    3 and 4
  3. C.
    2 and 4
  4. D.
    1 and 3 
70
Consider  the following statements regarding hysteresis loops of hard and soft magnetic materials:
1.Hysteresis loss of hard magnetic material will be less than that of soft material
2.Coercivity of hard materials will be greater than that of soft material
3.Retentivity of the two materials will always be equal
Which of these statements are correct?
  1. A.1, 2 and 3
  2. B.
    2 only
  3. C.
    3 only
  4. D.
    1 and 3 only 
71
Loss-tangent in plane waves in lossy dielectrics will be
  1. A.
    Proportional to the Y component of the magnetic field intensity (HY)
  2. B.Inversely proportional to the Y component of the magnetic field intensity (HY)
  3. C.
    Inversely proportional to the X component of the magnetic field intensity (HX)
  4. D.
    proportional to the X component of the magnetic field intensity (HX)
72
Orientational polarization is
  1. A.
    Inversely proportional to temperature and proportional to the square of the permanent dipole moment
  2. B.
    proportional to temperature as well as to the square of the permanent dipole moment
  3. C.
    proportional to temperature and inversely proportional to the square of the permanent dipole moment
  4. D.
    Inversely proportional to temperature as well as to the square of the permanent dipole moment
73
Behavior of conductors, semiconductors and insulators is explained on the basis of
  1. A.
    Atomic nature
  2. B.
    Molecular structure
  3. C.
    Energy band structure
  4. D.
    All of the above
74
In general, for a superconductor, which of the following statements is true?
  1. A.
    A superconductor is a perfect paramagnetic material with the magnetic susceptibility equals to positive unity
  2. B.
    A superconductor is a perfect diamagnetic material with the magnetic susceptibility equals to negative one
  3. C.
    A superconductor is a perfect ferromagnetic material with the magnetic susceptibility equals to positive one
  4. D.
    A superconductor is a perfect piezoelectric material with the magnetic susceptibility equals to negative one
75
Ferro-electric materials have a
  1. A.
    High dielectric constant which varies non linearly
  2. B.
    Low dielectric constant and is non-linear
  3. C.
    High dielectric constant which varies linearly
  4. D.
    Low dielectric constant but linear
76
In the magnetic core the electromotive forces (emf) induced in accordance with Faraday’s law of electromagnetic induction give rise to
  1. A.
    Eddy current
  2. B.
    Excitation current
  3. C.
    Armature current
  4. D.
    Field current
77
Consider the following characterizing parameters of a material:
1.Magnetic permeability
2.Electron relaxation time
3.Electron effective mass
4.Energy band gap
In case of metals, increase in one of the above parameter decreases its conductivity, while increase in another increases the conductivity. There are respectively
  1. A.1 and 3
  2. B.
    3 and 2
  3. C.
    4 and 3
  4. D.
    1 and 2
78
Some magnetic materials may be classified on the basis of
1.Susceptibility
2.Saturation
3.Spin arrangement
4.Nature of hysteresis loop
5.Domain structure
6.Critical temperature above which it behaves as a paramagnetic material 
Which of these can be used to distinguish between ferri and ferromagnetic materials?
  1. A.1, 3 and 4 only
  2. B.
    2, 3 and 6 only
  3. C.
    3, 4 and 5 only
  4. D.
    1, 2, 3, 4, 5 and 6
79
Magnetism is mainly due to only electron spin around their axis in case of
  1. A.
    Diamagnetic materials
  2. B.
    Paramagnetic materials
  3. C.
    Ferromagnetic materials
  4. D.
    Paramagnetic and Diamagnetic materials
80
For Paramagnetic materials, the relative permeability is
  1. A.
    Less than unity but magnetic susceptibility is relatively small and positive
  2. B.
    greater than unity and magnetic susceptibility is relatively small but positive
  3. C.
    equal to unity and magnetic susceptibility is relatively large but positive
  4. D.
    Less than unity but magnetic susceptibility is relatively large and positive
81
Resistance switching is normally resorted in case of
  1. A.Air blast CB
  2. B.Bulk oil CB
  3. C.Minimum oil CB
  4. D.All types of CB
82
By transmitting power at high voltage
  1. A.it will give poor voltage regulation
  2. B.it will give better voltage regulation
  3. C.it will not effect voltage regulation
  4. D.None of these
83
Which statement about the daily load curve is valid ?
  1. A.The area under the curve gives the average demand
  2. B.The ratio of the area under the curves to the total area of rectangle in which it is contained gives the load factor for the day
  3. C.The peak of the curve gives the installed capacity of the plant
  4. D.The area of the curves divided by the number of hours gives load factor
84
High voltage Schring bridge is used to measure
  1. A.large capacitance without additional element
  2. B.small capacitance without additional element
  3. C.medium value capacitance
  4. D.None of these
85
Draw - in - system of laying underground cables has the drawback (s) of
  1. A.higher cost
  2. B.reduced current carrying capacity of the cables
  3. C.requirements of much deeper and wider trenches
  4. D.repairs, alterations or additions difficult
  5. E.all of the above except
86
Surge impedance of a transmission line is
  1. A.independent of its length
  2. B.dependent on its length
  3. C.independent on its temperature
  4. D.none of the above
87
If two synchronous generators connected in parallel loose synchronism, it will lead to
  1. A.stalling of generators
  2. B.wild fluctuations in current
  3. C.wild fluctuations in current and voltage
  4. D.None of these
88
A differential relay responds to
  1. A.algebraic difference of two or more similar electrical quantities
  2. B.vector difference of two or more similar electrical quantities
  3. C.algebraic difference between two currents
  4. D.algebraic difference between two voltages
89
The conductor carries more current on the surface in comparison to its core. This phenomenon is called the
  1. A.Skin effect
  2. B.Corona
  3. C.Ferranti effect
  4. D.Lenz's effect
90
A booster is connected in
  1. A.series with the feeder
  2. B.parallel with the feeder
  3. C.both (a) and (b) are correct
  4. D.none of these
91
Fuses have got advantages of
  1. A.cheapest type of protection
  2. B.inverse time - current characteristic
  3. C.no maintenance
  4. D.current limiting effect under short - circuit conditions
  5. E.all of the above
92
The power transmitted will be maximum when
  1. A.line reactance is high
  2. B.corona losses are minimum
  3. C.sending end voltage is more
  4. D.receiving end voltage is more
93
The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The load factor of the consumer is
  1. A.0.75
  2. B.0.375
  3. C.1.33
  4. D.None of these
94
In a transformer, the exciting current will be in phase quadrature with the impressed voltage provided
  1. A.only the leakage impedance drop is ignored
  2. B.only the core loss is ignored
  3. C.both the leakage impedance drop and the core loss are ignored
  4. D.only the no - load copper loss is ignored
95
Which of the following techniques is used for the measurements of a.c. high frequency voltages ?
  1. A.Peak voltmeter
  2. B.Series resistance mircro - ammeter
  3. C.Resistance potential divider
  4. D.All of these
96
Use of additional shunt capacitor can be made for increasing the capability of line as it
  1. A.reduces surge impedance Z0
  2. B.increases phase shift β
  3. C.increase in α
  4. D.all of the above
97
The sag of a transmission line is least affected owing to
  1. A.weight of the conductor
  2. B.current through the conductor
  3. C.atmospheric temperature
  4. D.ice deposited on the conductor
98
In case of Impulse Thermal break down of solid insulating materials, the critical electric field is proportional to
  1. A.critical absolute temperature
  2. B.square of critical absolute temperature
  3. C.square of T0
  4. D.none of these
99
The insulation of the modern EHV lines is designed based on
  1. A.corona
  2. B.switching voltages
  3. C.lightning voltage
  4. D.all of these
100
For constant voltage transmission, the voltage drop along the line is maintained constant by installing
  1. A.capacitors
  2. B.inductors
  3. C.resistors
  4. D.synchronous phase modifiers at the receiving end
101
AC network analyser is employed for solving the problems of
  1. A.load flow
  2. B.load flow and stability
  3. C.load flow and short - circuit
  4. D.load flow, stability and short - circuit
102
The change in excitation in an alternator connected to an infinite line provides a corresponding change in
  1. A.terminal voltage
  2. B.speed of rotor
  3. C.power generated
  4. D.power factor
103
Different types of insulators used for transmission lines are
  1. A.pin type only
  2. B.suspension type only
  3. C.strain type only
  4. D.pin type, suspension type and shackle type
104
The conductor connecting consumer's terminals to the distributor is called the
  1. A.feeder
  2. B.distributor
  3. C.service main
  4. D.none of the above
105
Which of the following method or techniques can be used for the measurement of high d.c. voltages ?
  1. A.Generating voltmeter
  2. B.Electrostatic voltmeter
  3. C.Peak voltmeter
  4. D.Half effect generators
106
The ripple voltage in dc output is small if
  1. A.frequency of supply voltage is small
  2. B.the filtering capacitor is small
  3. C.load current is small
  4. D.none of these
107
The voltage measurements using uniform spark gap are
  1. A.affected by dust particles
  2. B.affected by polarity of supply
  3. C.affected by temperature
  4. D.none of these
108
Neutral earthing is provided for
  1. A.the safety of personnel from electric shock
  2. B.the safety of equipment and personnel against lightning and voltage surges
  3. C.reducing the voltage stress on lines and equipment with respect to earth under various operating and fault conditions
  4. D.controlling the earth fault currents for protective relaying
  5. E.both (c) and (d)
109
The function of Lightning arrester is
  1. A.to limiting the short - circuit fault current
  2. B.to provide path to high voltage surge to earth
  3. C.to reduce arcing
  4. D.none of these
110
In which of the following cases are delay fuses used ?
  1. A.For the protection of light circuits
  2. B.For the protection of power out - let circuits
  3. C.For the protection of fluorescent lamps
  4. D.For the protection of motors
111
In order to improve the voltage profile of the line, compensation is resorted by providing
  1. A.capacitors at the receiving end
  2. B.reactors at the receiving end
  3. C.resistors at the receiving end
  4. D.none of these
112
Skin effect in conductor is proportional to
  1. A.(diameter of conductor) 1/2
  2. B.diameter of conductor
  3. C.(diameter of conductor)2
  4. D.(diameter of conductor)4
113
The function of steel wire in an ACSR conductor is to
  1. A.compensate for skin effect
  2. B.take care of surges
  3. C.provide additional mechanical strength
  4. D.reduce inductance
114
A fault is more severe from the view point of RRRV if it is a
  1. A.Short length fault
  2. B.Medium length line fault
  3. C.Long length line fault
  4. D.None of these
115
Protective resistance to be connected between the sphere gap and the test equipment is required while measuring
  1. A.power frequency and higher frequency a.c. voltage
  2. B.power frequency and impulse voltage
  3. C.all kinds of voltages
  4. D.none of these
116
Series capacitor is used in a transmission line to
  1. A.compensate the voltage drop
  2. B.reduce line loss
  3. C.limit short circuit current
  4. D.improve load power factor
117
The passive element that is used as interconnecting element for the stable operation of interconnected system is
  1. A.reactor
  2. B.resistor
  3. C.capacitor
  4. D.resistor and capacitor
118
Corona loss in a transmission line is dependent on
  1. A.diameter of the conductor
  2. B.material of the conductor
  3. C.height of the conductor
  4. D.none of these
119
In a minimum oil circuit breaker the oil is used
  1. A.to act as circuit breaking medium only
  2. B.for circuit breaking and providing insulation
  3. C.for providing insulation only
  4. D.for none of the above purposes
120
Skin effect is
  1. A.proportional to frequency
  2. B.proportional to square of frequency
  3. C.inversely proportional to frequency
  4. D.independent of frequency
121
Rated making capacity of breaker is equal to
  1. A. X rated symmetrical breaking capacity
  2. B.2.55 X rated symmetrical breaking capacity
  3. C.1 X rated symmetrical breaking capacity
  4. D.none of these
122
The main reason for using high voltage for long distance power transmission is
  1. A.reduction in transmission losses
  2. B.reduction in time of transmission
  3. C.increase in system reliability
  4. D.none of the above
123
Bus - coupler is very essential in
  1. A.single bus - bar arrangement
  2. B.ring bus - bar arrangement
  3. C.double bus, double breaker arrangement
  4. D.main and transfer bus
124
With the rise in temperature, the insulation resistivity
  1. A.remains unchanged
  2. B.decreases linearly
  3. C.increases linearly
  4. D.reduces exponentially
125
The effect of bonding the cable is
  1. A.to increase the effective resistance and inductance
  2. B.to increase the effective resistance but reduce inductance
  3. C.to reduce the effective resistance and inductance
  4. D.to reduce the effective resistance but increase the inductance
126
Increase in temperature in overhead transmission lines causes
  1. A.increase in stress and length
  2. B.decrease in stress and length
  3. C.decrease in stress but increase in length
  4. D.none of the above
127
The insulation resistance of the cable decreases with the
  1. A.increase in length of cable
  2. B.decrease in length of cable
  3. C.electric stresses
  4. D.none of these
128
Corona has the disadvantage(s) of
  1. A.power loss
  2. B.interference with neighbouring communication circuits
  3. C.introducing the harmonics, predominately third harmonics, into the transmission lines
  4. D.all of the above
129
In a load duration curve for an intergrated power system the uppermost crest represents the energy contributed by
  1. A.base power stations
  2. B.major thermal stations
  3. C.peaking hydro or gas turbine stations
  4. D.non - conventional power stations
130
At bridge crossing and near the railway track ternary lead cables are used because they
  1. A.are of high tensile strength
  2. B.are of low coefficient of thermal expansion
  3. C.are of low specific gravity
  4. D.can withstand shocks and vibrations
131
The heat produced at the contact point owing to flow of electric current is least affected by
  1. A.temperature of the surrounding medium
  2. B.contact resistance
  3. C.magnitude of electric current flowing
  4. D.duration of flow of current
132
A stationary alternator should not be connected to the live bus - bar because
  1. A.it is likely to operate as a synchronous motor
  2. B.it will get short - circuited
  3. C.it will reduce bus - bar voltage
  4. D.all of the above
133
In a transmission system the feeder supplies power to
  1. A.transformer substations (step - up)
  2. B.service mains
  3. C.distributors
  4. D.all of the above
134
For a given amount of power to be transmitted over a certain distance with fixed power loss, the volume of copper required is
  1. A.directly proportional to voltage
  2. B.inversely proportional to voltage
  3. C.inversely proportional to the square of voltage and pf of the load
  4. D.directly proportional to the square of the voltage and pf of the load
135
Power despatch through a line can be increased by
  1. A.installing series capacitors
  2. B.installing shunt capacitors
  3. C.installing series reactor
  4. D.installing shunt reactor
136
In the figure shown which curve represents the variation of cost of generation per kWh with the load factor, for a thermal power plant ?
​
  1. A.Curve A
  2. B.Curve B
  3. C.Curve C
  4. D.Curve D
137
Under 'no load conditions the current in a transmission line is because of
  1. A.capacitance effect
  2. B.corona effect
  3. C.proximity effect
  4. D.back flow from earth
138
The only advantage of corona is that it
  1. A.produces a pleasing luminous glow
  2. B.makes line current sinusoidal
  3. C.works as a safety valve for surges
  4. D.ozone gas is produced
139
Earth wires are made of
  1. A.copper
  2. B.aluminium
  3. C.iron
  4. D.galvanised stranded steel
140
The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The demand factor of the consumer is
  1. A.0.75
  2. B.0.375
  3. C.1.33
  4. D.none of the above
141
A lightning arrester connected between the line and earth in a power system
  1. A.protects the terminal equipment against travelling surges
  2. B.protects the terminal equipment against direct lightning stroke
  3. C.suppresses high frequency oscillations in the line
  4. D.reflects back the travelling waves approaching it
142
Oil filled cables have the advantage(s) of
  1. A.smaller overall size
  2. B.most perfect impregnation
  3. C.easy detection of fault
  4. D.all of the above
143
A bus coupler circuit breaker is utilised in a substation for
  1. A.joining the transmission line with station bus - bar
  2. B.joining main and transfer bus in a substation
  3. C.joining the generator with transfer
  4. D.joining the neutral of the generator with earth
144
The fluids used in circuit breakers should be of
  1. A.high dielectric strength and thermal stability
  2. B.non - inflammability
  3. C.are extinguishing ability
  4. D.all of the above
145
Feeder is designed mainly from the point of view of
  1. A.its current carrying capacity
  2. B.voltage drop in it
  3. C.operating voltage
  4. D.operating frequency
146
Power output per unit volume of an MHD generator is proportional to
  1. A.specific electrical conductivity of gas
  2. B.square of the magnetic field strength
  3. C.square of the fluid velocity
  4. D.all of the above
147
Increase in frequecy of transmission line causes
  1. A.no change in line resistance
  2. B.increase in line resistance
  3. C.decrease in line resistance
  4. D.decrease in line series reactance
148
A dc series generator can excite itself
  1. A.only on zero load current
  2. B.only when load current is not zero
  3. C.irrespective of the value of load current
  4. D.none of the above
149
Thermal relays are used for protection of motors against over - current owing to
  1. A.short - circuits
  2. B.heavy loads
  3. C.earth fault
  4. D.all of these
150
Transmission efficiency of a transmission line increases with the
  1. A.decrease in power factor and voltage
  2. B.increase in power factor and voltage
  3. C.increase in power factor but decrease in voltage
  4. D.increase in voltage but decrease in power factor
151
While using air - blast circuit breaker, current chopping is a phenomenon often observed when
  1. A.a long overhead line is switched off
  2. B.a bank of capacitors is switched off
  3. C.a trasformer on no - load is switched off
  4. D.none of these
152
The contact resistance of a circuit breaker is about
  1. A.20 Ω
  2. B.2 Ω
  3. C.20 mΩ
  4. D.20 μΩ
153
Metallic shielding is provided on underground cables to
  1. A.reduce thermal resistance
  2. B.reduce corona effect
  3. C.control the electrostatic voltage stress
  4. D.all of the above
154
The most economical limit of power factor correcting is governed by
  1. A.original power factor
  2. B.relative costs of the supply and power factor correction equipment
  3. C.both (a) and (b)
  4. D.none of the above
155
A short - circuit current is identified by
  1. A.heavy current flow
  2. B.voltage rise
  3. C.voltage drop
  4. D.none of these
156
Which of the following materials is not used for transmission and distribution of electrical power ?
  1. A.Tungsten
  2. B.Copper
  3. C.Aluminium
  4. D.Cadmium copper
157
Which of the following alternators will have maximum number of poles ?
  1. A.Alternator coupled to hydraulic turbine
  2. B.Alternator coupled to steam turbine
  3. C.Alternator coupled to gas turbine
  4. D.All will have same number of poles
158
In humid weather, the corona occurs at a voltage
  1. A.much less than the needed in fair weather
  2. B.much higher than that needed in fair weather
  3. C.equal to that needed in fair weather
  4. D.none of the above
159
Short - circuit currents are due to
  1. A.single phase to earth fault
  2. B.phase to phase fault
  3. C.all the three phases to earth fault
  4. D.all the three phases short - circuited
  5. E.any of the above
160
Over - current protection respond to
  1. A.increase in current above pick - up value
  2. B.single line to earth faults
  3. C.double line to earth faults
  4. D.all of the above
161
A fuse is
  1. A.always connected in series with the circuit
  2. B.always connected in parallel with the circuit
  3. C.normally connected in series with the circuit
  4. D.none of these
162
Standard impulse testing of power transformer requires
  1. A.one application of chopped wave followed by one application of full - wave
  2. B.two applications of chopped wave followed by an application of a full - wave
  3. C.one application of chopped wave followed by two application of a full - wave
  4. D.none of these
163
The presence of earth in case of overhead lines
  1. A.increases the capacitance
  2. B.increases the inductance
  3. C.decreases the capacitance and increases the inductance
  4. D.does not effect any of the line constants
164
Partial discharge measurement on a cable gives
  1. A.p.f of the cable
  2. B.loss angle of the cable
  3. C.location of fault
  4. D.None of these
165
Any leakage of air into the condenser destroys the vacuum and causes
  1. A.an increase in air pressure in the condenser limiting the useful heat drop in the steam turbine
  2. B.lowering of the partial pressure of the steam and of the saturation temperature along with it
  3. C.undercooling of the condensate more severe
  4. D.all of the above
166
The intersheaths in cables are used to
  1. A.provide proper stress distribution
  2. B.minimize the stress
  3. C.provide protection against moisture and voltage surges
  4. D.provide protection against current and voltage surges
167
The string efficiency of insulators can be increased by
  1. A.reducing the number of strings
  2. B.increasing the number of strings
  3. C.correct grading of insulators of various strings
  4. D.none of these
168
Which one of the following statements regarding the position of minimum copper loss in a phase of rotary convertor is true ?
  1. A.The position of minimum copper loss is in the middle of the phase whatever may be the power factor
  2. B.The position of minimum copper loss varies with the variation in power factor and this position is displaced from the middle of the phase by the power factor angle
  3. C.The position of minimum copper loss is the tapping point whatever may be the power factor
  4. D.None of the above
169
In order to have lower cost of electrical generation
  1. A.the load factor and diversity factor should be high
  2. B.the load factor should be low but diversity factor high
  3. C.the load factor should be high but diversity factor low
  4. D.the load factor and diversity factor should be low
170
The stability limit of system is defined as the value of power below which
  1. A.the system is stable and above which also stable
  2. B.the system is unstable and above which it is stable
  3. C.the system is stable and above which it is unstable
  4. D.none of these
171
Swing equation represents
  1. A.the variation of power with respect to time
  2. B.the variation of torque angle with respect to time
  3. C.the variation of input power with respect to time
  4. D.none of these
172
In case of Impulse Thermal breakdown of insulating materials, the critical time to breakdown is
  1. A.proportional to critical electric field
  2. B.inversely proportional to critical electric field
  3. C.proportional to square of critical absolute temperature
  4. D.none of these
173
Economiser in a steam power plant
  1. A.improves the boiler efficiency by 10 - 12 %
  2. B.saves fuel consumption by 5 - 15 %
  3. C.becomes a necessity for pressure
  4. D.none of these
174
Conductor configuration determine
  1. A.inductance
  2. B.sag
  3. C.voltage
  4. D.current
175
If the length of the arc of circuit breaker increases, its resistance
  1. A.be extinguished
  2. B.decreases
  3. C.remains same
  4. D.none of these
176
If the frequency of a transmission system is changed from 50 Hz to 100 Hz, the string efficiency
  1. A.will increase
  2. B.will decrease
  3. C.remain unchanged
  4. D.may increase or decrease depending on the line parameters
177
The pressurised water reactors employ
  1. A.light water and natural uranium
  2. B.heavy water and enriched uranium
  3. C.light water and enriched uranium
  4. D.none of the above combinations
178
The suitable turbine used for harnessing tidal power is
  1. A.Francis turbine
  2. B.Pelton turbine
  3. C.Kaplan turbine
  4. D.None of these
179
In an AC Transmission line, difference in phase of voltages at the two ends of the line is due to
  1. A.resistance of line
  2. B.system voltage
  3. C.reactance of line
  4. D.insulators
180
Steam power plants work closely on
  1. A.Binary vapour cycle
  2. B.Brayton cycle
  3. C.Rankine cycle
  4. D.Carnot cycle

Numerical/GK & Reasoning

1
According to the passage, what is the main purpose of data protection laws ?
  1. A.To ensure that foreign countries invest in research for drugs to treat diseases like TB
  2. B.To attract Indian scientists back to the country
  3. C.To prevent misuse of research to make profit by competing companies
  4. D.To make clinical trials more acceptable to the public
  5. E.None of these
2
‘Gram’ is relatd to ‘Mass’ in the same way as ‘Centimetre’ is related to
  1. A.Area
  2. B.Volume
  3. C.Length
  4. D.Sound
  5. E.Energy
3
'Mustard' is related to 'Seed' in the same way as 'Carrot' is related to
  1. A.Fruit
  2. B.Stem
  3. C.Flower
  4. D.Root
  5. E.None of these
4
The cash difference between the selling prices of an article at a profit of 4% and 6% is Rs. 3. The ratio of the two selling prices is:__________ ?
  1. A.51:52
  2. B.52:53
  3. C.51:53
  4. D.52:55
5
Which of the following numbers is irrational ?
  1. A.√49
  2. B.0.125
  3. C.√2
  4. D.22/7
6
It is said that Ashoka attacked Kalinga to get a Beautiful Girl of Fisherman Caste. Name the Girl
  1. A.Lalita
  2. B.Chandrika
  3. C.Karubaki
  4. D.Rupambika
7
In which year was the Kalinga War Fought
  1. A.150 BC
  2. B.261 BC
  3. C.75 Dc
  4. D.​166 BC
8
When was the Constituent Assembly of India formed?
  1. A.1946
  2. B.1947
  3. C.1948
  4. D.1950
9
Which ministry launched the Green Hydrogen Certification Scheme of India (GHCI)?
  1. A.Ministry of Power
  2. B.Ministry of Petroleum and Natural Gas
  3. C.Ministry of New and Renewable Energy
  4. D.Ministry of Environment, Forest and Climate Change
10
The "Utkarsh Odisha – Make in Odisha Conclave 2025" was inaugurated by whom in Bhubaneswar?
  1. A.Chief Minister of Odisha
  2. B.Prime Minister of India
  3. C.President of India
  4. D.Union Minister of Commerce & Industry

English

1
I go to Madurai by —– Vaigai Express
  1. A.a
  2. B.an
  3. C.some
  4. D.the
2
Have the car stolen!
  1. A.Steal the car
  2. B.You should have the stolen car
  3. C.Get someone to steal the car
  4. D.They have stolen the car
3
The payment was collected by the hardworking salesman.
  1. A.The hardworking salesman collected the payment.
  2. B.the salesman who worked heard was able to collect the payment.
  3. C.to collect the payment the salesman had to work hard.
  4. D.The hardworking salesman was able to collect the payment.
4
I had to stop all my work to complete this project.
  1. A.All other work had to be stopped to complete this project by me
  2. B.For completing this project all other work must be stopped
  3. C.For completing this project I had to stop all my work
  4. D.To complete this project all other work had been stopped by me
5
They have published the names of all the successful candidates.
  1. A.The candidates who have succeeded their names they had published.
  2. B.The names of all the successful candidates have been published by them
  3. C.The candidates who have succeeded their names have been published by them.
  4. D.The names of all the successful candidate were published by them. 
6
The online shopping site lowered the prices.
  1. A.Lowering of the prices was done by the online shopping site
  2. B.The prices were lowered by the online shopping site
  3. C.The prices had been lowered by the online shopping site
  4. D.The prices have been lowered by the online shopping site
7
Who taught you to drive a truck ?
  1. A.To drive a truck by whom were you taught?
  2. B.Driving a truck by who were you taught?
  3. C.Driving a truck by who were you being taught?
  4. D.By whom were you taught to drive a truck?
8
We shall invite Suresh.
  1. A.Suresh would be invited by us
  2. B.Suresh would have been invited by us
  3. C.Suresh will be invited by us
  4. D.Suresh will have been invited by us
9
Dark clouds have overcast the evening sky.
  1. A.By the dark clouds the evening sky was overcast.
  2. B.The evening sky has been overcast by the dark clouds.
  3. C.Dark clouds overcastted the evening sky.
  4. D.The sky of the evening was overcasted by dark clouds.
10
The partners will celebrate their triumph tomorrow. 
  1. A.The triumph would be celebrated by the partners a day before
  2. B.The triumph would be celebrated by the partners a day after
  3. C.The triumph would have been celebrated by the partners a day after
  4. D.The triumph will have been celebrated by the partners tomorrow