A. asbestos fiber
B. silica sand
C. sodium chloride
D. silica gel
Related Mcqs:
- The chemical used in breather for transformer should have the quality of____________?
A. ionizing air
B. absorbing moisture
C. cleansing the transformer oil
D. cooling the transformer oil - The function of breather in a transformer is___________?
A. to provide oxygen inside the tank
B. to cool the coils during reduced load
C. to cool the transformer oil
D. to arrest flow of moisture when outside air enters the transformer - A common method of cooling a power transformer is_______________?
A. natural air cooling
B. air blast cooling
C. oil cooling
D. any of the above - A transformer transforms__________________?
A. voltage
B. current
C. power
D. frequency - The purpose of providing iron core in a step-up transformer is?
A. to provide coupling between primary and secondary
B. to increase the magnitude of mutual flux
C. to decrease the magnitude of mag-netizing current
D. to provide all above features - An ideal transformer has infinite values of primary and secondary inductances. The statement is______________?
A. true
B. false - Which winding of the transformer has less cross-sectional area?
A. Primary winding
B. Secondary winding
C. Low voltage winding
D. High voltage winding - Noise level test in a transformer is a______________?
A. special test
B. routine test
C. type test
D. none of the above - 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 - 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
