Computer Programming MCQs

5739 MCQs  (Page 523 of 574)

In a paper mill where constant speed is required________________?
A. synchronous motors are preferred
B. a.c. motors are preferred
C. individual drive is preferred
D. group drive is preferred
Reluctance motor is a________________?
A. variable torque motor
B. low torque variable speed motor
C. self starting type synchronous motor
D. low nosie, slow speed motor
For blowers which of the following motor is preferred ?
A. d.c. series motor
B. d.c. shunt motor
C. squirrel cage induction motor
D. wound rotor induction motor
___________________is preferred for synthetic fibre mills?
A. synchronous motor
B. reluctance motor
C. series motor
D. shunt motor
A reluctance motor_________________?
A. is provided with slip rings
B. requires starting gear
C. has high cost
D. is compact
________________ motor is a constant speed motor?
A. synchronous motor
B. schrage motor
C. induction motor
D. universal motor
Which of the following motors is used for elevators ?
A. induction motor
B. synchronous motor
C. capacitor start single phase motor
D. any of the above
For which of the following applications D.C. motors are still preferred ?
A. high efficiency operation
B. reversibility
C. variable speed drive
D. high starting torque