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WorksheetsElectrician Trade Test
Total questions: 10
Worksheet time: 8mins
The steel used for transformer core has
High silicon content
High permeability
Low hysteresis loss
All of the above
In a transformer, leakage flux
Helps in transfer of energy
Is negligible at full load
Is minimized by interleaving the primary and secondary windings
Produces mutually induced emf
Short circuit test of a transformer helps us to find its
Iron loss
Full-load Cu loss
Cu loss at no load
Cu loss at any desired load
A two-winding transformer operates at maximum efficiency when its
Hysteresis loss equals eddy current loss
Cu loss equals iron loss
Primary resistance equals secondary resistance
Voltage regulation is minimum
All day efficiency is meant to judge the performance of a ________ transformer.
Distribution
Auto
Power
Two-winding
A transformer is often used for multiplying electric power.
The above statement is True
The above statement is False
Constructionally the transformers are of two general types: Core type and Shell type.
The above statement is True
The above statement is False
The no load primary power input is practically equal to the iron loss in a transformer.
The above statement is True
The above statement is False
The commercial efficiency of a transformer is above 95%.
The above statement is True
The above statement is False
The open circuit test of a transformer is used for finding its copper loss.
The above statement is True
The above statement is False
