G.K. Practice Test: Question Set - 09
1. The insulation resistance of cables, transformers etc is measured by following instrument
- (A) Wheatstone
bridge
- (B) Kelvin
bridge
- (C) Meggar
- (D) Decade box
2. A watt meter can be connected to a high current circuit by using
- (A) Eddy
current transformer
- (B) Potential
transformer
- (C) Current
transformer
- (D) Shunt
3. The Wheatstone bridge is used to measure
- (A) Low
value of current
- (B) High
value of current
- (C) High
value of voltage
- (D) Resistance
value
4. The internal resistance of all milliammeter must be very low for
- (A) High
resistance
- (B) High
accuracy
- (C) Maximum
voltage drop across the meter
- (D) Minimum
effect on the current in the circuit
5. The internal resistance of the voltmeter must be very high in order to have
- (A) High voltage
range
- (B) Minimum
current through the meter
- (C) Maximum
loading effect
- (D) More current
supplied by the voltage source
6. Friction losses are more in the following type of instrument
- (A) Dynamometer
type
- (B) Moving coil
type
- (C) Moving iron
type
- (D) Null balance
type
7. A D.C voltmeter can be directly used to measure
- (A) Power factor
- (B) Insulation
resistance
- (C) Frequency
- (D) Polarity
8. Large current in D.C circuits can be measured with
- (A) Current
transformer and voltmeter
- (B) Potential
transformer and millivoltmeter
- (C) Shunt and millivoltmeter
- (D) R-C network
and voltmeter
9. Which of the following indicators is suitable only for direct current?
- (A) Permanent
magnet
- (B) Electro-dynamic
- (C) Moving iron
- (D) Hot wire
10. The scale of a moving coil meter is
- (A) Linear
- (B) Non-linear
- (C) Logarithmic
- (D) Uniform
initially and then cramped
11. Bolometer is used in measurement of
- (A) Microwave
power
- (B) Microwave
current
- (C) R.F power
- (D) Audio power
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