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.Management Sciences
Category: Electrical Engineering Mcqs
Which type of bearing is provided in small induction motors to support the rotor shaft ?
A. Ball bearings
B. Cast iron bearings
C. Bush bearings
D. None of the above
An induction motor with 1000 r.p.m. speed will have____________?
A. 8 poles
B. 6 poles
C. 4 poles
D. 2 poles
The isentropic expansion of steam through nozzle for the steam initially dry saturated at inlet is approximated by equation?
A. pv = C
B. pv1A = C
C. pv1i = C
D. pv
A single phase full bridge inverter can operate in load commutation mode in case load consists of____________?
A. RL.
B. RLC underdamped.
C. RLC overdamped.
D. RLC critically damped.
In a D.C. generator the ripples in the direct e.m.f. generated are reduced by_____________?
A. using conductor of annealed copper
B. using commutator with large number of segments
C. using carbon brushes of superior quality
D. using equiliser rings
In coal preparation plant, magnetic separators are used to remove___________?
A. dust
B. clinkers
C. iron particles
D. sand
In a JFET, IDSS is known as ________________?
A. drain to source current
B. drain to source current with gate shorted
C. drain to source current with gate open
D. none of the above
A dielectric material must be____________?
A. resistor
B. insulator
C. good conductor
D. semi conductor
A crystal diode utilises …………….. characteristic for rectification
A. reverse
B. forward
C. forward or reverse
D. none of the above
Which of the following is the commonly used type of electromagnets ?
A. Flat-faced armature type
B. Horse shoe type
C. Flat-faced plunger type
D. All of the above
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