200 Important Measurement and instrumentation MCQ Question and Answer | PDF Free Download
1.The chemical effect of current is used in
- ADC ammeter hour meter
- BDC ammeter
- CDC energy meter
- DNone of the above
2.In majority of instruments damping is provided by
- AFluid friction
- BSpring
- CEddy currents
- DAll of the above
3.An ammeter is a
- ASecondary instrument
- BAbsolute instrument
- CRecording instrument
- DIntegrating instrument
4.In a portable instrument, the controlling torque is provided by
- ASpring
- BGravity
- CEddy currents
- DAll of the above
5.The disc of an instrument using eddy current damping should be of
- AConducting and magnetic material
- BNon-conducting and magnetic material
- CConducting and non-magnetic material
- DNone of the above
6.The switch board instruments
- AShould be mounted in vertical position
- BShould be mounted in horizontal position
- CEither (a) or (b)
- DNeither (a) nor (b)
7.The function of shunt in an ammeter is to
- ABy pass the current
- BIncrease the sensitivity of the ammeter
- CIncrease the resistance of ammeter
- DNone of the above
8.The multiplier and the meter coil in a voltmeter are in
- ASeries
- BParallel
- CSeries-parallel
- DNone of the above
9.A moving iron instrument can be used for
- ADC only
- BAC only
- CBoth AC and DC
- DNone of the above
10.The scale of a rectifier instrument is
- ALinear
- BNon-linear
- CEither (a) or (b)
- DNeither (a) nor (b)
11.For measuring current at high frequency, we should use
- AMoving iron instrument
- BElectrostatic instrument
- CThermocouple instrument
- DNone of the above
12.The resistance in the circuit of the moving coil of a dynamometer wattmeter should be
- AAlmost zero
- BLow
- CHigh
- DNone of the above
13.A dynamometer wattmeter can be used for
- ABoth AC and DC
- BDC only
- CAC only
- DAny of the above
14.An induction wattmeter can be used for
- ABoth DC and AC
- BDC only
- CAC only
- DAny of the above
15.The pressure coil of a wattmeter should be connected on the supply side of the current coil when
- ALoad impedance is high
- BLoad impedance is low
- CSupply voltage is low
- DNone of the above
16.In a low power factor wattmeter, the pressure coil is connected
- ATo the supply side of the current coil
- BTo the load side of the current coil
- CIn any of the two meters at connection
- DNone of the above
17.In a low power factor wattmeter, the compensating coil is connected
- AIn series with current coil
- BIn parallel with current coil
- CIn series with pressure coil
- DIn parallel with pressure coil
18.In a 3-phase power measurement by two wattmeter method, both the wattmeters had identical readings. The power factor of the load was
- AUnity
- B0.8 lagging
- C0.8 leading
- DZero
19.In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be
- AUnity
- B0.5
- C0.3
- DZero
20.The adjustment of position of shading bands, in an energy meter is done to provide
- AFriction compensation
- BCreep compensation
- CBraking torque
- DNone of the above