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.Management Sciences
Category: Electrical Engineering Mcqs
The material used for fuse must have_____________?
A. low melting point and high specific resistance
B. low melting point and -low specific resistance
C. high melting point and low specific resistance
D. low melting point and any specific resistance
The maximum length of a screw conveyer is about___________?
A. 30 metres
B. 40 metres
C. 60 metres
D. 100 metres
What is true about the breakdown voltage in a Zener diode ?
A. It decreases when load current increases
B. It destroys the diode
C. It equals current times the resistance
D. It is approximately constant
_______________is a closed loop system?
A. Auto-pilot for an aircraft
B. Direct current generator
C. Car starter
D. Electric switch
The applications of selenium rectifiers are usually limited to potential of_____________?
A. 10 V
B. 30 V
C. 60 V
D. 100 V
E. 200 V
The SiO2 layer in an IC acts as ________________?
A. A resistor
B. An insulating layer
C. Mechanical output
D. None of the above
Which of the following is an electromagnetically device ?
A. Induction relay
B. Thermocouple
C. LVDT
D. Any of the above
F. None of the above
Stability of a synchronous machine:
A. decreases with increase in its excitation
B. increases with increase in its excitation
C. remains unaffected with increase in excitation
D. any of the above
An open-circuit test on a transformer is conducted primarily to measure______________?
A. insulation resistance
B. copper loss
C. core loss
D. total loss
E. efficiency
F. none of the above
The constant-current region of a JFET lies between______________?
A. cut off and saturation
B. cut off and pinch-off
a. and IDSS
C. pinch-off and breakdown
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