Which method of braking is generally used in elevators ?

Related Mcqs:

According to Fleming’s left-hand rule, when the forefinger points in the direction of the field or flux, the middle finger will point in the direction of_________________?

A. current in the conductor aovtaat of conductor C. resultant force on conductor D. none of the above...

In D.C. machines fractional pitch winding is used__________?

A. to improve cooling B. to reduce copper losses C. to increase the generated e.m.f. D. to reduce the sparking...

Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be_____________?

A. level compounded B. under compounded C. cumulatively compounded D. differentially compounded...

Which motor has the poorest speed control?

A. Differentially compounded motor B. Cumulatively compounded motor C. Shunt motor D. Series motor...

D.C. motor is to drive a load which has certain minimum value for most of the time and some peak value for short duration. We will select the________________?

A. series motor B. shunt motor C. compound motor D. any of the above...