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Question for MAHADISCOM Upkendra Sahayak - Quiz / Questions / MCQ in English

Last Update on : October 13, 2026

Duration: 120 · Questions: 110 · Max Marks: 140

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To boost your performance in MAHADISCOM Upkendra Sahayak exam, practice each question regularly and with focus. Every question tests your subject understanding, so solve them one at a time. Taking a quiz improves your speed and accuracy. Practicing topic-wise MCQs. Students benefit greatly from reviewing questions with answer keys, which help clarify concepts and strengthen Questions knowledge for success in MAHADISCOM Upkendra Sahayak exams.

Latest MAHADISCOM Upkendra Sahayak Exam Question (Objective Questions), MCQ in English

Subjects : Electrical, Reasoning, Quantitative Aptitude

Question Bank MAHADISCOM Upkendra Sahayak Exam - English.

Electrical

Q 1 :
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
Q 2 :
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
Q 3 :
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 
Q 4 :
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
Q 5 :
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
Q 6 :
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
Q 7 :
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
Q 8 :
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
Q 9 :
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
Q 10 :
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
Q 11 :
An atom in a crystal vibrates at a frequency, determined by
1. Crystal heat current
2. Crystal temperature
3. The stiffness of the bonds with neighbour atoms
Select the correct answer using the codes given below: 
  1. A.1 only 
  2. B.2 only 
  3. C.3 only
  4. D.1, 2 and 3
Q 12 :
Consider the following statements:
1. Nano means 10–9 so that nano materials have an order of dimension higher than the size of atom and come in the form of rods, tubes, spheres or even thin sheets/films
2. Nano materials have enhanced of changed structural property
3. Nano elements lend themselves to mechanical processing like rolling, twisting, positioning
4. Nano elements show important electrical, magnetic and optical characteristics that are useful in electrical industry
Which of the above statements are correct? 
  1. A.1, 2 and 3 only 
  2. B.1, 2, 3 and 4 
  3. C.3 and 4 only
  4. D.1, 2 and 4 only
Q 13 :
For a two-part reciprocal network, the three transmission parameters are A = 4, B = 7 and C = 5. What is the value of D? 
  1. A.9.5 
  2. B.9.0 
  3. C.8.5 
  4. D.8.0
Q 14 :
Consider the following as representations of reciprocity in terms of z-parameters:
1. z11 = z12                     2. z12 = z22
3. z12 = z21
Which of the above representations is/are correct? 
  1. A.1 only 
  2. B.2 only 
  3. C.3 only 
  4. D.1, 2 and 3
Q 15 :
Kirchhoff’s current law is applicable to
1. Closed loops in a circuit
2. Junction in a circuit
3. Magnetic circuits
Which of the above is/are correct? 
  1. A.1 only 
  2. B.2 only 
  3. C.3 only 
  4. D.1, 2 and 3
Q 16 :
Which of the following are satisfied in a non-linear network?
1. Associative               2. Superposition
3. Homogeneity             4. Bilaterality
Select the correct answer using the codes given below: 
  1. A.1 and 3 only 
  2. B.1 and 4 only 
  3. C.2 and 3 only      
  4. D.2 and 4 only
Q 17 :
Consider the following statements:
1. Network theorems are not derivable from Kirchhoff’s law
2. To get the Norton current, one has to short the current source
3. Thevenin’s theorem is suitable for a circuit involving voltage sources and series connections
Which of the above statements is/are correct? 
  1. A.1, 2 and 3         
  2. B.1 only 
  3. C.2 only 
  4. D.3 only 
Q 18 :
What is the octal equivalent of (5621.125)10? 
  1. A.11774.010 
  2. B.12765.100 
  3. C.16572.100         
  4. D.17652.010
Q 19 :
What is the hexadecimal representation of (657)8? 
  1. A.1 AF 
  2. B.D 78 
  3. C.D 71 
  4. D.32 F 
Q 20 :
In potential transformers, the secondary turns are increased slightly and the primary and secondary windings are wound as closely as possible to compensate for 
  1. A.Phase angle and ratio error, respectively 
  2. B.Ratio and phase angle error, respectively 
  3. C.Any eddy current loss and hysteresis loss, respectively 
  4. D.The hysteresis loss and eddy current loss, respectively 
Q 21 :
Which one of the following methods is used for the measurement of high resistances? 
  1. A.Carey-Foster bridge method 
  2. B.Substitution method 
  3. C.Loss of charge method 
  4. D.Potentiometer method 
Q 22 :
Consider the following statements with regard to induction type wattmeter:
1. Can be used on both ac and dc systems.
2. Power consumption is relatively low.
3. It is accurate only at stated frequency and temperature.
Which of the above statements is/are correct? 
  1. A.1 only 
  2. B.2 only 
  3. C.3 only 
  4. D.1,2 and 3 
Q 23 :
A computer system has a cache with a cache access time TC = 10 ns, a hit ratio of 80% and an average memory access time TM = 20 ns. What is the access time for physical memory TP? 
  1. A.90 ns 
  2. B.80 ns 
  3. C.60 ns 
  4. D.20 ns
Q 24 :
The minimum number of arithmetic operations required to evaluate the polynomial P(X) = X5+ 8X3+ X for a given value of X using only one temporary variable is 
  1. A.8
  2. B.7 
  3. C.6 
  4. D.5 
Q 25 :
A freewheeling diode in phase-controlled rectifiers
  1. A.enables inverter operation 
  2. B.is responsible for additional reactive power
  3. C.improves the line power factor 
  4. D.is responsible for additional harmonics
Q 26 :
 What is the analog output for a 4-bit R-2R ladder DAC when input is (1000)2, for Vref = 5V? 
  1. A. 2.3333 V 
  2. B.2.4444 V 
  3. C.2.5556 V 
  4. D.2.6667 V
Q 27 :
Which one of the following statements is correct? 
  1. A.LTI system is causal 
  2. B.If and only if its impulse response is nonzero for positive values of n. 
  3. C.If its impulse response is zero for negative values of n. 
  4. D.If its impulse response is zero for positive values of n
Q 28 :
 A system has 14 poles and 2 zeros in its open-loop transfer function. The slope of its highest frequency asymptote in its magnitude plot is 
  1. A.–40 dB/dec 
  2. B.–240 dB/dec 
  3. C.+40 dB/dec 
  4. D. +240 dB/dec
Q 29 :
 The characteristics of a mode of controller are summarized:
1. If error is zero, the output from the controller is zero.
2. If error is constant in time, the output from the controller is zero.
3. For changing error in time, the output from the controller is |K|% for every 1% sec–1 rate of change of error.
4. For positive rate of change of error, the output is also positive. The mode of controller is 
  1. A. Integral controller 
  2. B. Derivative controller 
  3. C.Proportional derivative 
  4. D.Proportional integral
Q 30 :
A 1000V/400vV power transformer has a nominal short-circuit voltage VSC = 40%. Which one of the following statements is correct? 
  1. A.A voltage of 400 V appears across the short-circuited secondary terminals
  2. B.A voltage of 16 V appears across the short-circuited secondary terminals. 
  3. C.When the secondary terminals are short-circuited, the rated current flows at the primary side at a primary voltage of 400 V. 
  4. D.The primary voltage drops to 400 V, when the secondary terminals are short-circuited.
Q 31 :
Consider the following statements:
1. Salient pole alternators have small diameters and large axial lengths.
2. Cylindrical rotor alternators have a distributed winding.
3. Cylindrical rotor alternators are wound for large number of poles.
4. Salient pole alternators run at speeds slower than cylindrical rotor machines.
Which of the above statements are correct?
  1. A.1 and 3 only 
  2. B.2 and 4 only 
  3. C.1 and 4 only 
  4. D.2 and 3 only
Q 32 :
A permanent magnet stepper motor with 8 poles in stator and 6 poles in rotor will have a step angle of 
  1. A.7.5°                  
  2. B.15° 
  3. C.30°       
  4. D.60°
Q 33 :
Bulk power transmission over long HVDC lines is preferred because of 
  1. A.Low cost of HVDC terminal 
  2. B.No harmonic losses 
  3. C.Minimum line power losses 
  4. D.Simple protection 
Q 34 :
The turn-off time of a thyristor is 30 µs at 50°C. What is its turn-off time at 100°C?
  1. A.15 µs 
  2. B.30 µs 
  3. C.60 µs 
  4. D.120 µs
Q 35 :
A large dc motor is required to control the speed of the blower from a 3-phase ac source. The suitable ac to dc converter is, 3-phase 
  1. A.Fully controlled bridge converter 
  2. B.Fully controlled bridge converter with freewheeling diode 
  3. C.Half controlled bridge converter 
  4. D.Converter pair in sequence control
Q 36 :
Consider the following statements:
1. The voltage developed across the OFF switches of the half bridge converter is the maximum dc link voltage.
2. In the full bridge converter, the voltage across the primary of the transformer is the dc link voltage.
3. The voltage developed across the OFF switches of the full bridge converter in half the maximum dc link voltage.
Which of the above statements are correct?
  1. A.1, 2 and 3 
  2. B.1 and 3 only 
  3. C.1 and 2 only 
  4. D.2 and 3 only
Q 37 :
What is the probability that at most 5 defective fuses will be found in a box of 200 fuses, if 2% of such fuses are defective? 
  1. A.0·82 
  2. B.0·79 
  3. C.0·59 
  4. D.0·52 
Q 38 :
At temperature above a limiting value, the energy of lattice vibrations, in a conductor, increases linearly with temperature so that resistivity increases linearly with temperature. In this region, this limiting value of temperature is called 
  1. A.Bernoulli Temperature 
  2. B.Curie Temperature 
  3. C.DebyeTemperature 
  4. D.Neel Temperature
Q 39 :
Consider the following statements:
1. The critical magnetic field of a superconductor is maximum at absolute zero.
2. Transition temperature of a superconductor is sensitive to its structure.
3. The critical magnetic field of a superconductor is zero at its critical temperature.
4. Superconductors show very high conductivity below the critical temperature.
Which of the above statements are correct? 
Select the correct answer using the codes given below:
  1. A.1 and 3 only 
  2. B.2 and 3 only 
  3. C.1 and 4 only 
  4. D.2 and 4 only
Q 40 :
Eddy current losses in transformer cores can be reduced by the use of
1. Solid cores
2. Laminated cores
3. Ferrites
Select the correct answer using he codes given below: 
  1. A.2 and 3 only 
  2. B.1 and 2 only 
  3. C.1 and 3 only                  
  4. D.1, 2 and 3
Q 41 :
The phenomenon of magnetostriction occurs when a ferromagnetic substance is magnetized resulting in 
  1. A.Heating 
  2. B.Small changes in its dimensions 
  3. C.Small changes in its crystal structure 
  4. D.Some change in its mechanical properties
Q 42 :
What type of defect causes F-centers in a crystal? 
  1. A.Stoichiometric defect 
  2. B.Metal excess defect due to anion vacancies 
  3. C.Metal excess defect due to extra cations
  4. D.Frenkel defect
Q 43 :
In a connected graph, the total number of branches is b and the total number of nodes is n. Then the number of links L of a co-tree is 
  1. A.b – n     
  2. B.b – n – 1 
  3. C.b + n – 1 
  4. D.b – n + 1
Q 44 :
When 7/0.029 V.I.R cable is carrying 20 A, a drop of 1 V occurs every 12 m. The voltage drop in a 100 m run of this cable when it is carrying 10 V is nearly 
  1. A.4.2 V    
  2. B.3.2 V 
  3. C.1.2 V 
  4. D.0.42 V
Q 45 :
Consider the following statements: If a high Q parallel resonant circuit is loaded with a resistance
1. The circuit impedance reduces
2. The resonant frequency remains the same
3. The bandwidth reduces
Which of the above statements is/are correct? 
  1. A.3 only 
  2. B.2 only 
  3. C.1 only 
  4. D.1, 2 and 3
Q 46 :
The three non-inductive loads of 5 kW, 3 kW and 2 kW are connected in a star network between R, Y and B phases and neutral. The line voltage is 400 V. The current in the neutral wire is nearly 
  1. A.11 A 
  2. B.14 A 
  3. C.17 A 
  4. D.21 A
Q 47 :
Consider the following statements with regard to Lissajous pattern on a CRO:
1. It is a stationary pattern on the CRO.
2. It is used for precise measurement of frequency of a voltage signal.
3. The ratio between frequencies of vertical and longitudinal voltage signals should be an integer to have a steady Lissajous pattern.
Which of the above statements is/are correct? 
  1. A.1 only 
  2. B.2 only 
  3. C.3 only 
  4. D.1,2 and 3 
Q 48 :
Electric flux enclosed by a surface surrounding a charge is equal to the amount of charge enclosed.” This is the statement of 
  1. A.Faraday’s law 
  2. B.Lenz’s law 
  3. C.Modified Ampere’s law 
  4. D.Gauss’s law
Q 49 :
If a positively charged body is placed inside a spherical hollow conductor, what will be the polarity of charge inside and outside the hollow conductor? 
  1. A.Inside positive, outside negative 
  2. B.Inside negative, outside positive 
  3. C.Both negative 
  4. D.Both positive 
Q 50 :
Consider the following statements with regard to Moving Iron (MI) instruments:
1. These instruments possess high operating torque.
2. These instruments can be used in ac and dc circuits.
3. Power consumption in these instruments is lower for low voltage range.
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 

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