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.Management Sciences
Category: Electrical Engineering Mcqs
AC power in a load can be controlled by using____________?
0
A. Two SCR’s in parallel opposition
B. Two SCR’s in series
C. Three SCR’s in series
D. Four SCR’s in series
The relative permittivity of rubber is____________?
A. between 2 and 3
B. between 5 and 6
C. between 8 and 10
D. between 12 and 14
Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as________?
A. 4 : 25
B. 25 : 4
C. 2 : 5
D. 5 : 2
A synchronous condenser is virtually which of the following?
A. Induction motor
B. Under excited synchronous motor
C. Over excited synchronous motor
D. D.C. generator
The speed of a superfast train is______________?
A. 60 kmph
B. 75 kmph
C. 100 kmph
D. more than 100 kmph
A gain of 1000 times in voltage is expressed by_______________?
A. 60 db
B. 30 db
C. 120 db
D. 600 db
A Zener voltage regulator will cease to act as a voltage regulator if Zener current becomes______________?
A. Less than load current
B. Zero
C. More than load current
D. None of the above
Which of the following medium is employed for extinction of arc in air circuit breaker?
A. Water
B. Oil
C. Air
D. SF6
The emitter of a transistor is___________doped?
A. lightly
B. heavily
C. moderately
D. none of the above
The relative permeability of a ferromagnetic material is_____________?
A. less than one
B. more than one
C. more than 10
D. more than 100 or 1000
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