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Question Bank

Question for WBPSC JE - Quiz / Questions / MCQ in English

Last Update on : October 10, 2026

Duration: 120 · Questions: 100 · Max Marks: 100

View WBPSC Junior Engineer 2026 Exam Page

To boost your performance in WBPSC JE 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 WBPSC JE exams.

Latest WBPSC JE Exam Question (Objective Questions), MCQ in English

Subjects : Electrical

Question Bank WBPSC Junior Engineer Exam (Electrical) - English

Electrical

Q 1 :
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
Q 2 :
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
Q 3 :
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
Q 4 :
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
Q 5 :
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
Q 6 :
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
Q 7 :
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
Q 8 :
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
Q 9 :
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
Q 10 :
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
Q 11 :
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
Q 12 :
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
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
  1. A.0.75
  2. B.0.375
  3. C.1.33
  4. D.None of these
Q 14 :
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
Q 15 :
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
Q 16 :
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
Q 17 :
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
Q 18 :
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
Q 19 :
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
Q 20 :
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
Q 21 :
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
Q 22 :
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
Q 23 :
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
Q 24 :
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
Q 25 :
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
Q 26 :
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
Q 27 :
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
Q 28 :
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)
Q 29 :
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
Q 30 :
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
Q 31 :
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
Q 32 :
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
Q 33 :
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
Q 34 :
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
Q 35 :
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
Q 36 :
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
Q 37 :
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
Q 38 :
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
Q 39 :
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
Q 40 :
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
Q 41 :
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
Q 42 :
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
Q 43 :
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
Q 44 :
With the rise in temperature, the insulation resistivity
  1. A.remains unchanged
  2. B.decreases linearly
  3. C.increases linearly
  4. D.reduces exponentially
Q 45 :
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
Q 46 :
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
Q 47 :
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
Q 48 :
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
Q 49 :
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
Q 50 :
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

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