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.Management Sciences
Category: Electrical Engineering Mcqs
Which is of the following data is required to draw the circle diagram for an induction motor ?
A. Block rotor test only
B. No load test only
C. Block rotor test and no-load test
D. Block rotor test, no-load test and stator resistance test
Which of the following is not a routine test on transformers ?
A. Core insulation voltage test
B. Impedance test
C. Radio interference test
D. Polarity test
A silicon transistor is biased with base resistor method. If ß=100, VBE =0.7 V, zero signal collector current IC = 1 mA and VCC = 6V , what is the value of the base resistor RB ?
A. 105 kO
B. 530 kO
C. 315 kO
D. None of the above
The maximum speed of electronic switch can be _____________operations per second?
A. 104
B. 10
C. 1000
D. 109
In a semiconductor, current conduction is due to________________?
A. Only holes
B. Only free electrons
C. Holes and free electrons
D. None of the above
Single phase VSI are mainly used in___________?
A. Power supplies
B. Ups
C. Multilevel configuration
D. All of these
The draught produced, for a given height of the chimney and given mean temperature of chimney gases_______________?
A. decreases with increase in outside air temperature
B. increases with increase in outside air temperature
C. remains the same irrespective of outside air temperature
D. may increase or decrease with increase in outside air temperature
A zener diode is always_______________ connected?
A. reverse
B. forward
C. either reverse or forward
D. none of the above
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