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Information and Communication Technology System Maintenance (ICTSM)
INDUCTANCE CAPACITANCE AND RESONANCE
Set 4
Set 4
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Q7149
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Why the core of current transformer is having low reactance and low core losses?
A
To minimize the burden
B
To maintain constant output
C
To prevent high static shield
D
To minimize the error in reading
Q7150
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Which power loss is assessed by open - circuit test on transformer?
A
Hysteresis loss only
B
Eddy current loss only
C
Copper loss
D
Core loss
Q7151
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Which material is used to make core of power transformer?
A
Soft iron
B
Rolled steel
C
Copper alloy
D
Cold rolled grain oriented
Q7152
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How to determine copper loss in a transformer?
A
Ratio test
B
Impulse test
C
Short circuit test
D
Open circuit test
Q7153
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Why ferrite core is used in radio receivers?
A
To reduce the constant losses
B
To reduce electric interference
C
To increase the quality of sound
D
To increase the efficiency of receivers
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