Computer Programming MCQs

5739 MCQs  (Page 524 of 574)

Which of the following motors are best for the rolling mills ?
A. single phase motors
B. squirrel cage induction motors
C. slip ring induction motors
D. d.c. motors
need frequent starting and stopping of electric motors ?
A. paper mills
B. grinding mills
C. air-conditioners
D. lifts and hosits
The starting torque in case of centrifugal pumps is generally_________________?
A. less than running torque
B. same as running torque
C. slightly more than running torque
D. double the running torque
For a particular application the type of electric-and control gear are determined by which of the following considerations ?
A. starting torque
B. conditions of environment
C. limitation on starting current
D. speed control range and its nature
Which of the following motors always starts on load ?
A. conveyor motor
B. floor mill motor
C. fan motor
D. all of the above
The load cycle for a motor driving a power press will be________________?
A. variable load
B. continuous
C. continuous but periodical
D. intermittent and variable load