Related Questions

A company paid tk.500000 in merit raises to employees whose performances were rated A, B, or C. Each employee rated A received twice the amount of the rated C.each employee rated B received 150% of the amount of the raise thst was paid to each employee rated C. if 50 workers were rated A,100rated B and 150 were rated C, how much was the raise paid to each employee rated B?
A Tk. 740
B Tk. 1250
C Tk. 1875
D Tk. 2500
The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as
A pull-up torque
B pull-in torque
C pull-out torque
D none of the above
A synchronous motor installed at the receiving end substation operates with such an excitation that it takes power at lagging power factor. Now if the applied voltage of the synchronous motor goes down, the power factor of the synchronous motor will
A remain same
B go down
C improve
D none of the above
A synchronous motor can develop synchronous torque
A when under loaded
B while over-excited
C only at synchronous speed
D below or above synchronous speed
The maximum value of torque that a synchronous motor can develop without losing its synchronism, is known as
A slip torque
B pull-out torque
C breaking torque
D synchronising torque
When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor
A remains same as the original value
B decreases to half the original value
C tends to becomes zero
D increases to two times the original value
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
Insertion of resistance in the rotor of an induction motor to develop a given torque
A Decreases the rotor current
B Increases the rotor current
C Rotor current becomes zero
D Rotor current remains same
The ratio of starting torque to running torque in a synchronous motor is
A zero
B one
C two
D infinity
The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of
A zero degree
B two degrees
C five degrees
D ten degrees

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