A. the current on secondary side is negligible
B. the voltage on secondary side does not vary
C. the voltage applied on primary side is low
D. full-load current is not supplied to the transformer
Related Mcqs:
- While conducting short-circuit test on a transformer the following side is short circuited?
A. High voltage side
B. Low voltage side
C. Primary side
D. Secondary side - Short circuit test on transformers is conducted to determine____________?
A. hysteresis losses
B. copper losses
C. core losses
D. eddy current losses - During open circuit test of a transformer:
A. primary is supplied rated voltage
B. primary is supplied full-load current
C. primary is supplied current at reduced voltage
D. primary is supplied rated kVA - An open-circuit test on a transformer is conducted primarily to measure______________?
A. insulation resistance
B. copper loss
C. core loss
D. total loss
E. efficiency
F. none of the above - Open circuit test on transformers is conducted to determine____________?
A. hysteresis losses
B. copper losses
C. core losses
D. eddy current losses - In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are______________?
A. friction and windage losses
B. copper losses
C. hysteresis and eddy current losses
D. none of the above - Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is_________________?
A. approximately equal to one
B. less than one
C. great than one
D. none of the above - Reduction in core losses and increase in permeability are obtained with transformer employing__________?
A. core built-up of laminations of cold rolled grain oriented steel
B. core built-up of laminations of hot rolled sheet
C. either of the above
D. none of the above - Losses which occur in rotating electric machines and do not occur in transformers are___________?
A. friction and windage losses
B. magnetic losses
C. hysteresis and eddy current losses
D. copper losses - In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are__________?
A. hysteresis and eddy current losses
B. friction and windage losses
C. copper losses
D. none of the above
1 Comment
Reason is wrong……
Iron losses in short circuit test are not absent they are just neglected. Because in the short circuit test the LV winding is short circuited which means high currrent and low voltage in the secondary side. … That’s why compare to copper loss, iron loss is very very less and it can be ignored during short circuit test.