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.Management Sciences
Category: Electrical Engineering Mcqs
The use of permanent magnets is. not made in_____________?
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A. magnetoes
B. energy meters
C. transformers
D. loud-speakers
For the safety of a steam boiler the number of safety valves fitted are____________?
A. four
B. three
C. two
D. one
Differential amplifiers are used in______________?
A. Instrumentation amplifiers
B. Voltage followers
C. Voltage regulators
D. Buffers
For transmission of power over a distance of 200 km, the transmission voltage should be_________kv?
A. 132 kV
B. 66 kV
C. 33 kV
D. 11 kV
The armature voltage control of D.C. motor provides____________?
A. constant torque drive
B. constant voltage drive
C. constant current drive
D. none of the above
is the property of absorbing moisture from atmosphere_____________?
A. Solubility
B. Viscosity
C. Porosity
D. Hygroscopicity
In ______________ the speed can be varied by changing the position of brushes?
A. slip ring motor
B. schrage motor
C. induction motor
D. repulsion motor
How can we protect SCR from thermal conditions _____________?
A. Use of snubber circuit.
B. Using heat sink.
C. Using CB and fuse.
D. Using equalizing circuit
he retentivity (a property) of material is useful for the construction of__________?
A. permanent magnets
B. transformers
C. non-magnetic substances
D. electromagnets
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