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.Management Sciences
Category: Electrical Engineering Mcqs
___________ brushes are fragile and cause excessive wear of commutator?
A. Natural graphite
B. Hard carbon
C. Electro graphitic
D. Metal graphite
The number of Boolean functions that can be generated by n variables is equal to_________________?
A. 2n
B. 22 n
C. 2n-1
D. — 2n
The rapid wear of brushes takes place due to____________?
A. abrasion from dust
B. excessive spring pressure
C. rough commutator bars
D. high mica insulation between com-mutation bars
E. all of the above factors
If a transformer is continuously operated the maximum temperature rise will occur in_______________?
A. core
B. windings
C. tank
D. any of the above
The multivibrator which generates square wave of its own is the ____________multivibrator?
A. Monostable
B. Bistable
C. Astable
D. None of the above
In Boolean algebra, the bar sign (-) indicates__________________?
A. OR operation
B. AND operation
C. NOT operation
D. None of the above
During load shedding:
A. system power factor is changed
B. some loads are switched off
C. system voltage is reduced
D. system frequency is reduced Efficiency is the secondary consideration in
In a series circuit with unequal resistances______________?
A. the highest resistance has the most of the current through it
B. the lowest resistance has the highest voltage drop
C. the lowest resistance has the highest current
D. the highest resistance has the highest voltage drop
With forward bias to a pn junction , the width of depletion layer__________________?
A. Decreases
B. Increases
C. Remains the same
D. None of the above
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