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Wireman
MEASURING INSTRUMENT
Set 4
Set 4
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Q14132
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Why the pointer of a megger is in any place on the scale while it is in idle?
A
The deflecting torque is proportional to current
B
The deflecting torque on the meter is inversely proportional to current
C
The instrument does not have controlling torque
D
The deflecting torque is inversely proportional to square of the current
Q14133
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Which principle earth tester works?
A
Induction
B
Magnetic attraction
C
Magnetic deflection
D
Fall of Potential
Q14134
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What is the name of term that the ability of the measuring instrument to agree with itself repeatedly?
A
Precision
B
Sensitivity
C
Resolution
D
Accuracy
Q14135
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What is the cause for creeping error in Energy meter?
A
Change in resistance
B
Improper power factor
C
Rotation of disc when the load is OFF
D
Abnormal friction of the moving system
Q14136
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How the low range of the ammeter can be extended to higher range?
A
By connecting a shunt resistor in parallel across meter coil
B
By connecting a resistor in series with meter coil
C
By connecting a resistor in series with supply
D
By connecting two resistors across with supply
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