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.Management Sciences
Category: Electrical Engineering Mcqs
An AF amplifier is shielded to ________________?
A. Keep the amplifier cool
B. Protect from rusting
C. Prevent induction due to stray magnetic fields
D. None of the above
On which of the following factors the number of phases for which a rectifier should be designed depend ?
A. The voltage regulation of the rec¬tifier should be low
B. In the output circuit there should be no harmonics
C. The power factor of the system should be high
D. The rectifier supply transformer should be utilized to the best ad-vantage
E. all of the above
Which of the following is the basic consideration in the design of insulation ?
A. Electrical considerations
B. Mechanical considerations
C. Thermal considerations
D. All of the above
In the a.c. equivalent circuit of a transistor amplifier, the capacitors are considered ___________________?
A. Short
B. Open
C. Partially open
D. None of the above
Which of the following could be lamina-proximately the thickness of laminations of a D.C. machine ?
A. 0.005 mm
B. 0.05 mm
C. 0.5 m
D. 5 m
The disadvantage of a half-wave rectifier is that the__________________?
A. components are expensive
B. diodes must have a higher power rating
C. output is difficult to filter
D. none of the above
The output impedance of an emitter follower is______________?
A. High
B. Very high
C. Almost zero
D. Low
In a transmitter ____________oscillator is used?
A. Hartley
B. RC phase-shift
C. Wien-bridge
D. Crystal
Annual depreciation cost is calculated by___________?
A. sinking fund method
B. straight line method
C. both A. and B.
D. none of the above
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