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.Management Sciences
Category: Electrical Engineering Mcqs
When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is___________?
A. 1 n-mho
B. 106 mho
C. 1 milli-mho
D. none of the above
Which feature, while selecting a.motor for centrifugal pump, will be of least significance ?
A. Starting characteristics
B. Operating speed
C. Horse power
D. Speed control
Which medium has the least dielectric strength ____________?
A. Paraffin wax
B. Quartz
C. Glass
D. Air
When SCR is OFF, the current in the circuit is ________________?
A. Exactly zero
B. Small leakage current
C. Large leakage current
D. None of the above
In a crystal, an atom vibrates at a frequency determined by_______________?
A. the heat content of the crystal
B. the temperature of the crystal
C. the stiffness of the bonds it makes with neighbors
A differentiating circuit is a simple RC circuit with output taken across ____________?
A. R
B. C
C. Both R and C
D. None of the above
An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be_____?
A. 1500 A.
B. 6000 A.
C. 2121.32 A.
D. 4242.64 A.
The power factor of a single phase load can be calculated if the instruments available are_____________?
A. one voltmeter and one ammeter
B. one voltmeter, one ammeter and one wattmeter
C. one voltmeter, one ammeter and one energy meter
D. any of the above
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