Which of the following load normally needs starting torque more than the rated torque?
Which of the following load normally needs starting torque more than the rated torque?
A. Blowers
B. Conveyors
C. Air compressors
D. Centrifugal pumps
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The purpose of retardation test on D.C. shunt machines is to find out____________?
The purpose of retardation test on D.C. shunt machines is to find out____________?
A. stray losses
B. eddy current losses
C. field copper losses
D. windage lossesThe type of D.C. motor used for shears and punches is_____________?
The type of D.C. motor used for shears and punches is_____________?
A. shunt motor
B. series motor
C. differential compoutid D.C. motor
D. cumulative compound D.C. motorAccording 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_________________?
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 aboveTorque developed by a D.C. motor depends upon_____________?
Torque developed by a D.C. motor depends upon_____________?
A. magnetic field
B. active length of the conductor
C. current flow through the conductors
D. number of conductors
E. radius of armature
F. all above factorsThe total losses in a well designed D.C. generator of 10 kW will be nearly______________?
The total losses in a well designed D.C. generator of 10 kW will be nearly______________?
A. 100 W
B. 500 W
C. 1000 W
D. 1500 WFor the same H.P. rating and full load speed, following motor has poor starting torque_____________?
For the same H.P. rating and full load speed, following motor has poor starting torque_____________?
A. shunt
B. series
C. differentially compounded
D. cumulativelyc’ompounded