Category: Electrical Engineering Mcqs
Main causes of noisy solenoid are______________?
A. strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force
B. uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts
C. both of above
D. none of the above
capacitors are used for audio frequency and radio frequency coupling and tuning ?
A. Air
B. Mica
C. Plastic film
D. Ceramic
In thermal-electrical analogy charge is considered analogous to_______________?
A. heat flow
B. reciprocal of heat flow
C. reciprocal of temperature
D. temperature
F. none of the above
For constant torque drive which speed control method is preferred ?
A. Field control
B. Armature voltage control
C. Shunt armature control
D. Mechanical loading system
Internal short circuits are caused by___________?
A. breakdown of one or more separators
B. excess accumulation of sediment at the bottom of the cell
C. both (A) and (B)
D. none of the above
In fuel cell, the ___________ energy is converted into electrical energy?
A. mechanical
B. chemical
C. heat
D. sound
In case of OR gate, no matter what the number of inputs, a____________________?
A. 1 at any input causes the output to be at logic 1
B. 1 at any input causes the output to be at logic 0
C. 0 any input causes the output to be at logic 0
D. 0 at any input causes the output to be at logic 1
It is generally desired that a transistor should have_____________________ input impedance?
A. Low
B. Very low
C. High
D. Very high
When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop_________________?
A. inductor motor torque
B. induction generator torque
C. synchronous motor torque
D. d.c. motor toque
E. none of the above
Which of the following motors is preferred for tape-recorders ?
A. Shaded pole motor
B. Hysteresis motor
C. Two value capacitor motor
D. Universal motor
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