Explore topic-wise MCQs in Electrical Engineering Questions.

This section includes 109 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

1.

A moving-coil permanent-magnet instrument can be used as ____________by using a low resistance shunt?
A. ammeter
B. voltmeter
C. flux-meter
D. ballistic galvanometer
Answer» B. voltmeter
Discussion
2.

The scale of a rectifier instrument is_________________?
A. linear
B. non-linear
C. either A. or B.
D. neither A. nor B.
Answer» B. non-linear
Discussion
3.

For measuring a very high resistance we should use_______________?
A. Kelvin’s double bridge
B. Wheat stone bridge
C. Meggar
D. None of the above
Answer» D. None of the above
Discussion
4.

An induction meter can handle current up to_____________?
A. 10 A
B. 30 A
C. 60 A
D. 100 A
Answer» E.
Discussion
5.

A potentiometer may be used for_________________?
A. measurement of resistance
B. measurement of current
C. calibration of ammeter
D. calibration of voltmeter
E. all of the above
Answer» F.
Discussion
6.

__________ instruments are those which measure the total quantity of electricity delivered in a particular time ?
A. Absolute
B. Indicating
C. Recording
D. Integrating
Answer» E.
Discussion
7.

The operating voltage of a meggar is about_______________?
A. 6 V
B. 12 V
C. 40 V
D. 100 V
Answer» E.
Discussion
8.

A multirangq instrument has________________?
A. multiple shunt or series resistances inside the meter
B. multicoii arrangement
C. variable turns of coil
D. multi range meters inside the measurement system
E. any of the above
Answer» B. multicoii arrangement
Discussion
9.

The ratio of maximum displacement deviation to full scale deviation of the instrument is called_______________?
A. static sensitivity
B. dynamic deviation
C. linearity
D. precision or accuracy
Answer» D. precision or accuracy
Discussion
10.

For measurements on high voltage capacitors, the suitable bridge is_______________?
A. Wein bridge
B. Modified De Santy’s bridge
C. Schering bridge
D. Any of the above
E. None of the above
Answer» D. Any of the above
Discussion
11.

The principle on which vector voltmeter is based is_____________?
A. that it works on the principle of complex variation
B. that it measures the response of linear ramp voltage
C. same as digital meter
D. that it measures the amplitude of a single at two points and at the same time measures their phase difference
Answer» E.
Discussion
12.

In an energy meter braking torque is produced to________________?
A. safe guard it against creep
B. brake the instrument
C. bring energy meter to stand still
D. maintain steady speed and equal to driving torque
Answer» E.
Discussion
13.

In an Anderson bridge, the unknown inductance is measured in terms of_______________?
A. known inductance and resistance
B. known capacitance and resistance
C. known resistance
D. known inductance
Answer» C. known resistance
Discussion
14.

E.m.f. of a Weston cell is accurately measured by________________?
A. electrostatic voltmeter
B. hot wire voltmeter
C. isothermal voltmeter
D. electrodynamic voltmeter
Answer» B. hot wire voltmeter
Discussion
15.

Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to_____________?
A. improve its ventilation
B. eliminate creeping at no load
C. increase its deflecting torque
D. increase its braking torque
Answer» C. increase its deflecting torque
Discussion
16.

To measure radio frequency, the suitable frequency meter is_______________?
A. Weston frequency meter
B. reed vibrator frequency meter
C. heterodoxy frequency meter
D. electrical resonance frequency meter
Answer» D. electrical resonance frequency meter
Discussion
17.

Wattmeter cannot be designed on the principle of_________________?
A. electrostatic instrument
B. thermocouple instrument
C. moving iron instrument
D. electrodynamic instrument
Answer» D. electrodynamic instrument
Discussion
18.

Instrument transformers are_______________?
A. potential transformers
B. current transformers
C. both A. and B.
D. power transformers
Answer» D. power transformers
Discussion
19.

Alternating current is measured by_______________?
A. induction ammeter
B. permanent magnet type ammeter
C. electrostatic ammeter
D. moving iron repulsion type voltmeter
Answer» B. permanent magnet type ammeter
Discussion
20.

Damping of the Ballistic galvanometer is made small to_______________?
A. get first deflection large
B. make the system oscillatory
C. make the system critically damped
D. get minimum overshoot
Answer» B. make the system oscillatory
Discussion
21.

Systematic errors are_________________?
A. instrumental errors
B. environmental errors
C. observational errors
D. all of the above
Answer» E.
Discussion
22.

Volt box is a component to_____________?
A. extend voltage range
B. measure voltage
C. compare voltage in a box
D. none of the above
Answer» B. measure voltage
Discussion
23.

Operating torques in analogue instruments are_______________?
A. deflecting and control
B. deflecting and damping
C. deflecting, control and damping
D. vibration and balancing
Answer» D. vibration and balancing
Discussion
24.

A sensitive galvanometer produces large deflection for a_______________?
A. small value of current
B. large value of current
C. large value of power
D. large value of voltage
E. none of the above
Answer» B. large value of current
Discussion
25.

The gravity controlled instrument has crowded scale because current is proportional to________________?
A. balancing weight
B. deflection angle
C. sine of deflection angle
Answer» D.
Discussion
26.

Most sensitive galvanometer is_____________?
A. elastic galvanometer
B. vibration galvanometer
C. Duddlb galvanometer
D. spot ballistic galvanometer
Answer» E.
Discussion
27.

If an instrument has cramped scale for larger values, then it follows________________?
A. square law
B. logarithmic law
C. uniform law
D. none of the above
Answer» C. uniform law
Discussion
28.

Commonly used instruments in power system measurement are_______________?
A. induction
B. moving coil or iron
C. rectifier
D. electrostatic
Answer» B. moving coil or iron
Discussion
29.

Commonly used standard capacitor is______________?
A. spherical type
B. concentric cylindrical type
C. electrostatic type
D. multilayer parallel plate type
Answer» C. electrostatic type
Discussion
30.

In Weston synchronoscope the moving coil is connected across______________?
A. bus-bars
B. incoming alternator
C. fixed coils
D. any of the above
Answer» B. incoming alternator
Discussion
31.

Standard resistor is made from_________________?
A. platinum
B. maganin
C. silver
D. nichrome
Answer» C. silver
Discussion
32.

The power of a n-phase circuit can be measured by using a minimum of_______________?
A. (n – 1) wattmeter elements
B. n wattmeter elements
C. (n + 1) wattmeter elements
D. 2n wattmeter elements
Answer» B. n wattmeter elements
Discussion
33.

The desirable static characteristics of a measuring system are______________?
A. accuracy and reproducibility
B. accuracy, sensitivity and reproducibility
C. drift and dead zone
D. static error
Answer» C. drift and dead zone
Discussion
34.

Various adjustments in an energy meter include_______________?
A. light load or friction
B. lag and creep
C. overload and voltage compensation
D. temperature compensation
E. all of the above
Answer» F.
Discussion
35.

Which of the following is measured by using a vector voltmeter ?
A. Amplifier gain and phase shift
B. Filler transfer functions
C. Complex insersion loss
D. All of the above
Answer» E.
Discussion
36.

An instrument transformer is used to extend the range of______________?
A. induction instrument
B. electrostatic instrument
C. moving coil instrument
D. any of the above
Answer» B. electrostatic instrument
Discussion
37.

The rectifier instrument is not free from_______________?
A. temperature error
B. wave shape error
C. frequency error
D. all of the above
Answer» D. all of the above
Discussion
38.

The use of _________ instruments is merely confined within laboratories as standardizing instruments?
A. absolute
B. indicating
C. recording
D. integrating
E. none of the above
Answer» B. indicating
Discussion
39.

For measuring current at high frequency we should use_______________?
A. moving iron instrument
B. electrostatic instrument
C. thermocouple instrument
D. none of the above
Answer» D. none of the above
Discussion
40.

The chemical effect of current is used in ______________?
A. D.C. ammeter hour meter
B. D.C. ammeter
C. D.C. energy meter
D. none of the above
Answer» B. D.C. ammeter
Discussion
41.

An induction wattmeter can be used for_________________?
A. both D.C. and A.C.
B. D.C. only
C. A.C. only
D. any of the above
Answer» C. A.C. only
Discussion
42.

For handling greater currents induction wattmeters are used in conjunction with______________?
A. potential transformers
B. current transformers
C. power transformers
D. either of the above
E. none of the above
Answer» C. power transformers
Discussion
43.

Induction type single phase energy meters measure electric energy in_______________?
A. kW
B. Wh
C. kWh
D. VAR
E. None of the above
Answer» D. VAR
Discussion
44.

Most common form of A.C. meters met with in every day domestic and industrial installations are______________?
A. mercury motor meters
B. commutator motor meters
C. induction type single phase energy meters
D. all of the above
Answer» D. all of the above
Discussion
45.

In a low power factor wattmeter the compensating coil is connected_______________?
A. in series with current coil
B. in parallel with current coil
C. in series with pressure coil
D. in parallel with pressure coil
Answer» D. in parallel with pressure coil
Discussion
46.

is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another_______________?
A. Tangent galvanometer
B. Meggar
C. Current transformer
D. None of the above
Answer» C. Current transformer
Discussion
47.

A moving-coil permanent-magnet instrument can be used as flux-meter_____________?
A. by using a low resistance shunt
B. by using a high series resistance
C. by eliminating the control springs
D. by making control springs of large moment of inertia
Answer» D. by making control springs of large moment of inertia
Discussion
48.

The multiplier and the meter coil in a voltmeter are in________________?
A. series
B. parallel
C. series-parallel
D. none of the above
Answer» B. parallel
Discussion
49.

The function of shunt in an ammeter is to______________?
A. by pass the current
B. increase the sensitivity of the ammeter
C. increase the resistance of ammeter
D. none of the above
Answer» B. increase the sensitivity of the ammeter
Discussion
50.

When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is____________?
A. short-circuited
B. all right
C. faulty
Answer» C. faulty
Discussion