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.Management Sciences
Category: Electrical Engineering Mcqs
Which of the following resistive materials has the lowest temperature co-efficient of resistance ?
A. Nichrome
B. Constantan
C. Kanthal
D. Molybdenum
The materials are a bit inferior conductors of magnetic flux than air
A. ferromagnetic
B. paramagnetic
C. diamagnetic
D. dielectric
The secondary of a current transformer is always short-circuited under operating conditions because it____________________?
A. avoids core saturation and high voltage induction
B. is safe to human beings
C. protects the primary circuit
D. none of the above
A pilot exciter is provided on generators for which of the following reasons?
A. To excite the poles of main exciter
B. To provide requisite starting torque to main exciter
C. To provide requisite starting torque to generator
D. None of the above
The rate of acceleration on suburban orurban services is restricted by the consideration of______________?
A. Engine power
B. Track curves
C. Passenger Discomfort
D. Track size
The power mentioned on the name plate of an electric motor indicates____________?
A. the power drawn in kW
B. the power drawn in kVA
C. the gross power
D. the output power available at the shaft
The phase difference between the output and input voltages of a CE amplifier is _____________?
A. 180o
B. 0o
C. 90o
D. 270o
In _________ fuel transportation cost is least.
A. nuclear power plants
B. diesel generating plants
C. steam power stations
D. None
Large industrial consumers are supplied electrical energy at__________________?
A. 400 V
B. 11 kV
C. 66 kV
D. 400 kV
The pinch-off voltage in a JFET is analogous to _____________ voltage in a vacuum tube?
A. anode
B. cathode
C. grid cut off
D. none of the above
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