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.Management Sciences
Category: Electrical Engineering Mcqs
A synchronous motor which works on a leading power factor and does not drive a mechanical load is called as_________?
A. static condenser
B. condenser
C. synchronous condenser
D. none of the above
Velocity error constant of a system is measured when the input to the system is unit ___________ function?
A. parabolic
B. ramp
C. impulse
D. step
For a particular material the Hall coefficient was found to be zero. The material is______________?
A. insulator
B. metal
C. intrinsic semiconductor
D. none of the above
While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?
A. Running characteristics
B. Starting characteristics
C. Efficiency
D. Braking
Specific energy consumption is affected by which of the following factors ?
A. Retardation and acceleration values
B. Gradient
C. Distance between stops
D. All of the above
In a 3 phase VSI SPWM to use a single carrier signal and preserve the features of PWM technique, the normalized carrier frequency should be____________?
A. Multiple of two
B. Odd multiple of three
C. Odd multiple of five
D. Odd multiple of seven
A TRIAC can be turned on with______________?
A. Positive voltage at the gate terminal
B. Negative voltage at the gate terminal
C. Either (a) or (b)
D. None of these
At room temperature, an intrinsic semiconductor has_______________?
A. Many holes only
B. A few free electrons and holes
C. Many free electrons only
D. No holes or free electrons
If one of the resistors in a parallel circuit is removed, the total resistance_____________?
A. decreases
B. increases
C. remains the same
D. doubles
Skin effect occurs when a conductor carries current at_______ frequencies
A. very low
B. low
C. medium
D. high
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