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.Management Sciences
Category: Electrical Engineering Mcqs
In a single phase power factor meter the phase difference between the currents in the two pressure coils is___________________?
A. exactly 0°
B. approximately 0°
C. exactly 90°
D. approximately 90°
If the input capacitor of a transistor amplifier is short-circuited, then_________________?
A. Transistor will be destroyed
B. Biasing conditions will change
C. Signal will not reach the base
D. None of the above
In a regenerative surface condenser_____________?
A. there is one pump to remove air and condensate
B. there are two pumps to remove air and condensate
C. there are three pumps to remove air, vapour and condensate
D. there is no pump, the condensate gets removed by gravity
A certain noninverting amplifier has Ri of 1 kO and Rf of 100 kO. The closed-loop voltage gain is_____________?
A. 100,000
B. 1000
C. 101
D. 100
Cells are connected in parallel to__________?
A. increase the efficiency
B. increase the current capacity
C. increase the voltage output
D. increase the internal resistance
While preparing electrolyte for a lead-acid battery___________?
A. water is poured into acid
B. acid is poured into water
C. anyone of the two can be added to other chemical
The watt-hour efficiency of a lead-acid cell varies between________?
A. 25 to 35%
B. 40 to 60%
C. 70 to 80%
D. 90 to 95%
In the above question, what are the values of cut-off frequencies?
A. 140 kHz , 60 kHz
B. 1020 kHz , 980 kHz
C. 1030 kHz , 970 kHz
D. None of the above
Quartz crystal is most commonly used in crystal oscillators because:____________?
A. It has superior electrical properties
B. It is easily available
C. It is quite inexpensive
D. None of the above
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