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.Management Sciences
Category: Electrical Engineering Mcqs
Regenerative cycle thermal efficiency_______________?
A. is always greater than simple Rankine thermal efficiency
B. is greater than simple Rankine cycle thermal efficiency only when steam is bled at particular pressure
C. is same as simple Rankine cycle thermal efficiency
D. is always less than simple Rankine cycle thermal efficiency
Which of the following materials is used in the manufacture of resistance grids to be used in the starters of large motors ?
A. Copper
B. Aluminium
C. Steel
D. Cast-iron
If a D.C. series motor is operated on A.C. supply, it will____________?
A. spark excessively
B. have poor efficiency
C. have poor power factor
D. all of the above
A transistor takes_____________ inductor on a silicon IC chip?
A. Less space than
B. More space than
C. Same space as
D. None of the above
The first goal to accomplish in analyzing a complex series-parallel circuit is to____________?
A. solve for all the voltage drops
B. solve for the total current and resistance
C. equate all series components
D. equate all parallel components
In a TRF radio receiver, the RF and detection stages are tuned to______________?
A. Radio frequency
B. IF
C. Audio frequency
D. None of the above
Which motor is normally free from mechanical and magnetic vibrations ?
A. Split phase motor
B. Universal motor
C. Hysteresis motor
D. Shaded pole motor
Electrical power output in a d.c. generator is equal to____________?
A. Electrical power developed in armature – copper losses
B. Mechanical power input – iron and friction losses
C. Electrical power developed in armature – iron and copper losses
D. Mechanical power input – iron and friction losses – copper losses
In which of the following motors the stator and rotor magnetic field rotate at the same speed?
A. Universal motor
B. Synchronous motor
C. Induction motor
D. Reluctance motor
In a mercury arc rectifier, the anode is usually made of_____________?
A. copper
B. aluminium
C. silver
D. graphite
E. tungsten
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