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.Management Sciences
Category: Electrical Engineering Mcqs
The substances which combine together to store electrical energy during the charge are called ________ materials
A. active
B. passive
C. inert
D. dielectric
Ionization in circuit breaker is facilitated by___________?
A. high temperature
B. increase of mean free path
C. increasing field strength
D. all of the above
The use of negative feedback ________________?
A. reduces the voltage gain of an Op-amp
B. makes the Op-amp oscillate
C. makes linear operation possible
D. answers (A) and (B)
The maximum percentage gain in Regenerative feed heating cycle thermal efficiency____________?
A. increases with number of feed heaters increasing
B. decreases with number of feed heaters increasing
C. remains same unaffected by number of feed heaters
D. none of the above
The metal rectifiers are preferred to valve rectifiers due to which of the following advantages ?
A. They are mechanically strong
B. They do not require any voltage for filament heating
C. Both (A) and (B)
D. None of the above
For derries and winches which of the following drives can be used ?
A. Pole changing squirrel cage motors
B. D.C. motors with Ward-leonard con-trol
C. A.C. slip ring motors with variable resistance
D. Any of the above
The letters AVC stand for ________________?
A. Audio voltage control
B. Abrupt voltage control
C. Automatic volume control
D. Automatic voltage control
In a control system the output of the controller is given to_____________?
A. final control element
B. amplifier
C. comparator
D. sensor
F. none of the above
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