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Wireman
GENERATION AND TRANSMISSION
Set 3
Set 3
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Q13987
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Which principle auto transformer works?
A
Lenzs law
B
Flemings right hand rule
C
Self induction
D
Mutual induction
Q13988
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Where synthetic liquid transformer oil is used?
A
Generating station transformers
B
Primary substation transformers
C
Refineries and hazardous location
D
Secondary substation transformers
Q13989
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Which part produces magnetic flux in a transformer?
A
Primary winding
B
Secondary winding
C
Tap charger
D
Core
Q13990
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Which is the function of breather in transformer?
A
Observes heat
B
Indicate oil level
C
Prevents the moisture entry
D
Reduces tank pressure
Q13991
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Why the transformer core is laminated?
A
To minimise the hysteresis losses
B
To minimise the eddy current loss
C
To minimise the copper loss
D
To minimise the friction loss
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