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.Management Sciences
Category: Electrical Engineering Mcqs
The frequency and time domain are related through which of the following ?
A. Laplace Transform and Fourier Integral
B. Laplace Transform
C. Fourier Integral
D. Either B. or C.
Greater the secondary leakage flux____________?
A. less will be the secondary induced e.m.f.
B. less will be the primary induced e.m.f.
C. less will be the primary terminal voltage
D. none of the above
A Zener diode utilises_____________characteristic for voltage regulation?
A. Forward
B. Reverse
C. Both forward and reverse
D. None of the above
In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of_________________?
A. less than 15 A
B. more than 15 A
C. 15 A
D. none of the above
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
If the fault occurs near the impedance relay, the VII ratio will be____________?
A. constant for all distances
B. lower than that of if fault occurs away from the relay
C. higher than that of if fault occurs away from the relay
D. none of the above
Synchronous motors are generally not self-starting because:
A. the direction of rotation is not fixed
B. the direction of instantaneous torque reverses after half cycle
C. startes cannot be used on these machines
D. starting winding is not provided on the machines
Which of the following protection is normally not provided on small distribution transformers ?
A. Overfluxing protection
B. Buchholz relay
C. Overcurrent protection
D. All of the above
Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________?
A. Voltage across the plates increases
B. voltage across the plates decreases
C. charge on the capacitor decreases
D. charge on the capacitor increases
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