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.Management Sciences
Category: Electrical Engineering Mcqs
Which of the following source of power is least reliable?
A. Solar energy
B. Geothermal power
C. Wind power
D. iMHD
In a transformer the tappings are generally provided on_____________?
A. primary side
B. secondary side
C. low voltage side
D. high voltage side
In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ______________?
A. almost touch each other
B. have large gap
C. have moderate gap
D. none of the above
A Zener diode is used as a _____________voltage regulating device?
A. Shunt
B. Series
C. Series-shunt
D. None of the above
The armature core of a D.C. generator is usually made of__________________?
A. silicon steel
B. copper
C. non-ferrous material
D. cast-iron
jCorona usually occurs when the electrostatic stress in air around the conductor exceeds?
A. 6.6 kV (r.m.s. value)/cm
B. 11 kV (r.m.s. value)/cm
C. 22 kV (maximum value)/cm
D. 30 kV (maximum value)/cm
If energy is taken from the AC side of the inverter and sends it back into the DC side, then it is known as___________?
A. Motoring mode operation
B. Braking mode operation
C. Regenerative mode operation
D. None of these
The viscous friction co-efficient, in force-voltage analogy, is analogous to______________?
A. charge
B. resistance
C. reciprocal of inductance
D. reciprocal of conductance
F. none of the above
In two part tariff, variation in load factor will affect____________?
A. fixed charges
B. operating or running charges
C. both A. and (b)
D. either A. or (b)
By the use of which of the following, high frequency power supply for induction furnaces can be obtained ?
A. Coreless transformers
B. Current transformers
C. Motor-generator set
D. Multi-phase transformer
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