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Latest TSTRANSCO AE Exam Question (Objective Questions), MCQ in English
Subjects : Electrical, General Awareness & Numerical Ability
Question Bank TSTRANSCO AE (Electrical) Exam - English
Electrical
Q 1 :
Resistance switching is normally resorted in case of
A.Air blast CB
B.Bulk oil CB
C.Minimum oil CB
D.All types of CB
Q 2 :
By transmitting power at high voltage
A.it will give poor voltage regulation
B.it will give better voltage regulation
C.it will not effect voltage regulation
D.None of these
Q 3 :
Which statement about the daily load curve is valid ?
A.The area under the curve gives the average demand
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
C.The peak of the curve gives the installed capacity of the plant
D.The area of the curves divided by the number of hours gives load factor
Q 4 :
High voltage Schring bridge is used to measure
A.large capacitance without additional element
B.small capacitance without additional element
C.medium value capacitance
D.None of these
Q 5 :
Draw - in - system of laying underground cables has the drawback (s) of
A.higher cost
B.reduced current carrying capacity of the cables
C.requirements of much deeper and wider trenches
D.repairs, alterations or additions difficult
E.all of the above except
Q 6 :
Surge impedance of a transmission line is
A.independent of its length
B.dependent on its length
C.independent on its temperature
D.none of the above
Q 7 :
If two synchronous generators connected in parallel loose synchronism, it will lead to
A.stalling of generators
B.wild fluctuations in current
C.wild fluctuations in current and voltage
D.None of these
Q 8 :
A differential relay responds to
A.algebraic difference of two or more similar electrical quantities
B.vector difference of two or more similar electrical quantities
C.algebraic difference between two currents
D.algebraic difference between two voltages
Q 9 :
The conductor carries more current on the surface in comparison to its core. This phenomenon is called the
A.Skin effect
B.Corona
C.Ferranti effect
D.Lenz's effect
Q 10 :
A booster is connected in
A.series with the feeder
B.parallel with the feeder
C.both (a) and (b) are correct
D.none of these
Q 11 :
Fuses have got advantages of
A.cheapest type of protection
B.inverse time - current characteristic
C.no maintenance
D.current limiting effect under short - circuit conditions
E.all of the above
Q 12 :
The power transmitted will be maximum when
A.line reactance is high
B.corona losses are minimum
C.sending end voltage is more
D.receiving end voltage is more
Q 13 :
The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The load factor of the consumer is
A.0.75
B.0.375
C.1.33
D.None of these
Q 14 :
In a transformer, the exciting current will be in phase quadrature with the impressed voltage provided
A.only the leakage impedance drop is ignored
B.only the core loss is ignored
C.both the leakage impedance drop and the core loss are ignored
D.only the no - load copper loss is ignored
Q 15 :
Which of the following techniques is used for the measurements of a.c. high frequency voltages ?
A.Peak voltmeter
B.Series resistance mircro - ammeter
C.Resistance potential divider
D.All of these
Q 16 :
Use of additional shunt capacitor can be made for increasing the capability of line as it
A.reduces surge impedance Z0
B.increases phase shift β
C.increase in α
D.all of the above
Q 17 :
The sag of a transmission line is least affected owing to
A.weight of the conductor
B.current through the conductor
C.atmospheric temperature
D.ice deposited on the conductor
Q 18 :
In case of Impulse Thermal break down of solid insulating materials, the critical electric field is proportional to
A.critical absolute temperature
B.square of critical absolute temperature
C.square of T0
D.none of these
Q 19 :
The insulation of the modern EHV lines is designed based on
A.corona
B.switching voltages
C.lightning voltage
D.all of these
Q 20 :
For constant voltage transmission, the voltage drop along the line is maintained constant by installing
A.capacitors
B.inductors
C.resistors
D.synchronous phase modifiers at the receiving end
Q 21 :
AC network analyser is employed for solving the problems of
A.load flow
B.load flow and stability
C.load flow and short - circuit
D.load flow, stability and short - circuit
Q 22 :
The change in excitation in an alternator connected to an infinite line provides a corresponding change in
A.terminal voltage
B.speed of rotor
C.power generated
D.power factor
Q 23 :
Different types of insulators used for transmission lines are
A.pin type only
B.suspension type only
C.strain type only
D.pin type, suspension type and shackle type
Q 24 :
The conductor connecting consumer's terminals to the distributor is called the
A.feeder
B.distributor
C.service main
D.none of the above
Q 25 :
Which of the following method or techniques can be used for the measurement of high d.c. voltages ?
A.Generating voltmeter
B.Electrostatic voltmeter
C.Peak voltmeter
D.Half effect generators
Q 26 :
The ripple voltage in dc output is small if
A.frequency of supply voltage is small
B.the filtering capacitor is small
C.load current is small
D.none of these
Q 27 :
The voltage measurements using uniform spark gap are
A.affected by dust particles
B.affected by polarity of supply
C.affected by temperature
D.none of these
Q 28 :
Neutral earthing is provided for
A.the safety of personnel from electric shock
B.the safety of equipment and personnel against lightning and voltage surges
C.reducing the voltage stress on lines and equipment with respect to earth under various operating and fault conditions
D.controlling the earth fault currents for protective relaying
E.both (c) and (d)
Q 29 :
The function of Lightning arrester is
A.to limiting the short - circuit fault current
B.to provide path to high voltage surge to earth
C.to reduce arcing
D.none of these
Q 30 :
In which of the following cases are delay fuses used ?
A.For the protection of light circuits
B.For the protection of power out - let circuits
C.For the protection of fluorescent lamps
D.For the protection of motors
Q 31 :
In order to improve the voltage profile of the line, compensation is resorted by providing
A.capacitors at the receiving end
B.reactors at the receiving end
C.resistors at the receiving end
D.none of these
Q 32 :
Skin effect in conductor is proportional to
A.(diameter of conductor) 1/2
B.diameter of conductor
C.(diameter of conductor)2
D.(diameter of conductor)4
Q 33 :
The function of steel wire in an ACSR conductor is to
A.compensate for skin effect
B.take care of surges
C.provide additional mechanical strength
D.reduce inductance
Q 34 :
A fault is more severe from the view point of RRRV if it is a
A.Short length fault
B.Medium length line fault
C.Long length line fault
D.None of these
Q 35 :
Protective resistance to be connected between the sphere gap and the test equipment is required while measuring
A.power frequency and higher frequency a.c. voltage
B.power frequency and impulse voltage
C.all kinds of voltages
D.none of these
Q 36 :
Series capacitor is used in a transmission line to
A.compensate the voltage drop
B.reduce line loss
C.limit short circuit current
D.improve load power factor
Q 37 :
The passive element that is used as interconnecting element for the stable operation of interconnected system is
A.reactor
B.resistor
C.capacitor
D.resistor and capacitor
Q 38 :
Corona loss in a transmission line is dependent on
A.diameter of the conductor
B.material of the conductor
C.height of the conductor
D.none of these
Q 39 :
In a minimum oil circuit breaker the oil is used
A.to act as circuit breaking medium only
B.for circuit breaking and providing insulation
C.for providing insulation only
D.for none of the above purposes
Q 40 :
Skin effect is
A.proportional to frequency
B.proportional to square of frequency
C.inversely proportional to frequency
D.independent of frequency
Q 41 :
Rated making capacity of breaker is equal to
A. X rated symmetrical breaking capacity
B.2.55 X rated symmetrical breaking capacity
C.1 X rated symmetrical breaking capacity
D.none of these
Q 42 :
The main reason for using high voltage for long distance power transmission is
A.reduction in transmission losses
B.reduction in time of transmission
C.increase in system reliability
D.none of the above
Q 43 :
Bus - coupler is very essential in
A.single bus - bar arrangement
B.ring bus - bar arrangement
C.double bus, double breaker arrangement
D.main and transfer bus
Q 44 :
With the rise in temperature, the insulation resistivity
A.remains unchanged
B.decreases linearly
C.increases linearly
D.reduces exponentially
Q 45 :
The effect of bonding the cable is
A.to increase the effective resistance and inductance
B.to increase the effective resistance but reduce inductance
C.to reduce the effective resistance and inductance
D.to reduce the effective resistance but increase the inductance
Q 46 :
Increase in temperature in overhead transmission lines causes
A.increase in stress and length
B.decrease in stress and length
C.decrease in stress but increase in length
D.none of the above
Q 47 :
The insulation resistance of the cable decreases with the
A.increase in length of cable
B.decrease in length of cable
C.electric stresses
D.none of these
Q 48 :
Corona has the disadvantage(s) of
A.power loss
B.interference with neighbouring communication circuits
C.introducing the harmonics, predominately third harmonics, into the transmission lines
D.all of the above
Q 49 :
In a load duration curve for an intergrated power system the uppermost crest represents the energy contributed by
A.base power stations
B.major thermal stations
C.peaking hydro or gas turbine stations
D.non - conventional power stations
Q 50 :
At bridge crossing and near the railway track ternary lead cables are used because they
A.are of high tensile strength
B.are of low coefficient of thermal expansion
C.are of low specific gravity
D.can withstand shocks and vibrations
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TSTRANSCO AE (Electrical) Exam Question Bank Book - English
The heat produced at the contact point owing to flow of electric current is least affected by
A.temperature of the surrounding medium
B.contact resistance
C.magnitude of electric current flowing
D.duration of flow of current
Q 52 :
A stationary alternator should not be connected to the live bus - bar because
A.it is likely to operate as a synchronous motor
B.it will get short - circuited
C.it will reduce bus - bar voltage
D.all of the above
Q 53 :
In a transmission system the feeder supplies power to
A.transformer substations (step - up)
B.service mains
C.distributors
D.all of the above
Q 54 :
For a given amount of power to be transmitted over a certain distance with fixed power loss, the volume of copper required is
A.directly proportional to voltage
B.inversely proportional to voltage
C.inversely proportional to the square of voltage and pf of the load
D.directly proportional to the square of the voltage and pf of the load
Q 55 :
Power despatch through a line can be increased by
A.installing series capacitors
B.installing shunt capacitors
C.installing series reactor
D.installing shunt reactor
Q 56 :
In the figure shown which curve represents the variation of cost of generation per kWh with the load factor, for a thermal power plant ?
​
A.Curve A
B.Curve B
C.Curve C
D.Curve D
Q 57 :
Under 'no load conditions the current in a transmission line is because of
A.capacitance effect
B.corona effect
C.proximity effect
D.back flow from earth
Q 58 :
The only advantage of corona is that it
A.produces a pleasing luminous glow
B.makes line current sinusoidal
C.works as a safety valve for surges
D.ozone gas is produced
Q 59 :
Earth wires are made of
A.copper
B.aluminium
C.iron
D.galvanised stranded steel
Q 60 :
The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The demand factor of the consumer is
A.0.75
B.0.375
C.1.33
D.none of the above
Q 61 :
A lightning arrester connected between the line and earth in a power system
A.protects the terminal equipment against travelling surges
B.protects the terminal equipment against direct lightning stroke
C.suppresses high frequency oscillations in the line
D.reflects back the travelling waves approaching it
Q 62 :
Oil filled cables have the advantage(s) of
A.smaller overall size
B.most perfect impregnation
C.easy detection of fault
D.all of the above
Q 63 :
A bus coupler circuit breaker is utilised in a substation for
A.joining the transmission line with station bus - bar
B.joining main and transfer bus in a substation
C.joining the generator with transfer
D.joining the neutral of the generator with earth
Q 64 :
The fluids used in circuit breakers should be of
A.high dielectric strength and thermal stability
B.non - inflammability
C.are extinguishing ability
D.all of the above
Q 65 :
Feeder is designed mainly from the point of view of
A.its current carrying capacity
B.voltage drop in it
C.operating voltage
D.operating frequency
Q 66 :
Power output per unit volume of an MHD generator is proportional to
A.specific electrical conductivity of gas
B.square of the magnetic field strength
C.square of the fluid velocity
D.all of the above
Q 67 :
Increase in frequecy of transmission line causes
A.no change in line resistance
B.increase in line resistance
C.decrease in line resistance
D.decrease in line series reactance
Q 68 :
A dc series generator can excite itself
A.only on zero load current
B.only when load current is not zero
C.irrespective of the value of load current
D.none of the above
Q 69 :
Thermal relays are used for protection of motors against over - current owing to
A.short - circuits
B.heavy loads
C.earth fault
D.all of these
Q 70 :
Transmission efficiency of a transmission line increases with the
A.decrease in power factor and voltage
B.increase in power factor and voltage
C.increase in power factor but decrease in voltage
D.increase in voltage but decrease in power factor
Q 71 :
While using air - blast circuit breaker, current chopping is a phenomenon often observed when
A.a long overhead line is switched off
B.a bank of capacitors is switched off
C.a trasformer on no - load is switched off
D.none of these
Q 72 :
The contact resistance of a circuit breaker is about
A.20 Ω
B.2 Ω
C.20 mΩ
D.20 μΩ
Q 73 :
Metallic shielding is provided on underground cables to
A.reduce thermal resistance
B.reduce corona effect
C.control the electrostatic voltage stress
D.all of the above
Q 74 :
The most economical limit of power factor correcting is governed by
A.original power factor
B.relative costs of the supply and power factor correction equipment
C.both (a) and (b)
D.none of the above
Q 75 :
A short - circuit current is identified by
A.heavy current flow
B.voltage rise
C.voltage drop
D.none of these
Q 76 :
Which of the following materials is not used for transmission and distribution of electrical power ?
A.Tungsten
B.Copper
C.Aluminium
D.Cadmium copper
Q 77 :
Which of the following alternators will have maximum number of poles ?
A.Alternator coupled to hydraulic turbine
B.Alternator coupled to steam turbine
C.Alternator coupled to gas turbine
D.All will have same number of poles
Q 78 :
In humid weather, the corona occurs at a voltage
A.much less than the needed in fair weather
B.much higher than that needed in fair weather
C.equal to that needed in fair weather
D.none of the above
Q 79 :
Short - circuit currents are due to
A.single phase to earth fault
B.phase to phase fault
C.all the three phases to earth fault
D.all the three phases short - circuited
E.any of the above
Q 80 :
Over - current protection respond to
A.increase in current above pick - up value
B.single line to earth faults
C.double line to earth faults
D.all of the above
General Awareness & Numerical Ability
Q 81 :
Which Windows interface element typically appears to display information, a warning, an error message, or a request for confirmation?
A.Window
B.Pop-up menu
C.Message box
D.Taskbar
Q 82 :
What is active desktop ?
A.a term that is synonymous with viewing your desktop as web page
B.a feature to customize your desktop to display informating you can update from the internet
C.both a and b above mentioned
D.A software
E.None of these
Q 83 :
Yojna a weekly journal
A.Ministry of Finance
B.Ministry of Information and Broadcastin
C.Ministry of Rural Development
D.Planning Commission
Q 84 :
I go to Madurai by —– Vaigai Express
A.a
B.an
C.some
D.the
Q 85 :
Have the car stolen!
A.Steal the car
B.You should have the stolen car
C.Get someone to steal the car
D.They have stolen the car
Q 86 :
According to the passage, what is the main purpose of data protection laws ?
A.To ensure that foreign countries invest in research for drugs to treat diseases like TB
B.To attract Indian scientists back to the country
C.To prevent misuse of research to make profit by competing companies
D.To make clinical trials more acceptable to the public
E.None of these
Q 87 :
‘Gram’ is relatd to ‘Mass’ in the same way as ‘Centimetre’ is related to
A.Area
B.Volume
C.Length
D.Sound
E.Energy
Q 88 :
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:__________ ?
A.51:52
B.52:53
C.51:53
D.52:55
Q 89 :
Which of the following numbers is irrational ?
A.√49
B.0.125
C.√2
D.22/7
Q 90 :
356 x 936 – 356 x 836 = ?
A.35600
B.34500
C.9630
D.93600
Q 91 :
Arrange in descending order: 5/8, 7/10, 3/4
A.3/4 > 7/10 > 5/8
B.7/10 > 3/4 > 5/8
C.3/4 > 5/8 > 7/10
D.5/8 > 7/10 > 3/4
Q 92 :
What is (3^{4} times 9^{2}) ?
A.36
B.38
C.310
D.96
Q 93 :
If 34X-2 = 729, then find the value of X.
A.4
B.3
C.2
D.5
Q 94 :
Convert 0.6 into fraction ?
A.3/5
B.2/3
C.4/5
Q 95 :
The no. plate of a bus had peculiarity. The bus number was a perfect square. It was also a perfect square when the plate numbers were reversed. The bus company had only five hundred buses numbered from 1 to 500. What was the number ?
A.169
B.36
C.196
D.Can not say
Q 96 :
If a and b are positive integers, such that ab = 125, then (a-b)a+b-4 = ?
A.16
B.25
C.28
D.30
Q 97 :
If x*y = x2 + y2 – xy, then value of 9*11 is
A.93
B.103
C.60.5
D.121
Q 98 :
Telangana Grameena Bank is
A.a Co-operative Bank
B.a Government Scheduled Bank
C.a Housing Bank
D.an Investment Bank
Q 99 :
The Scheme 'HRIDAY' is related to
A.Urban development
B.Rural development
C.Health improvement
D.Literacy improvement
Q 100 :
The brand "Flora," introduced in 1964, is associated with which product?
X rated symmetrical breaking capacity