200 Important Measurement and instrumentation MCQ Question and Answer | PDF Free Download
1.Operating torques in analogue instruments are
- ADeflecting and control
- BDeflecting and damping
- CDeflecting, control and damping
- DVibration and balancing
2.Commonly used instruments in power system measurement are
- AInduction
- BMoving coil or iron
- CRectifier
- DElectrostatic
3.Damping of the Ballistic galvanometer is made small to
- AGet first deflection large
- BMake the system oscillatory
- CMake the system critically damped
- DGet minimum overshoot
4.If an instrument has cramped scale for larger values, then it follows
- ASquare law
- BLogarithmic law
- CUniform law
- DNone of the above
5.Volt-box is basically a device used for
- AMeasuring the voltage
- BMeasuring power
- CExtending the enrage of voltmeter
- DExtending the voltage range of the potentiometer
6.A multirange instrument has
- AMultiple shunt or series resistances inside the meter
- BMulticoil arrangement
- CVariable turns of coil
- DMulti range meters inside the measurement system
7.The rectifier instrument is not free from
- ATemperature error
- BWave shape error
- CFrequency error
- DAll of the above
8.Alternating current is measured by
- AInduction ammeter
- BPermanent magnet type ammeter
- CElectrostatic ammeter
- DMoving iron repulsion type voltmeter
9.Most sensitive galvanometer is
- AElastic galvanometer
- BVibration galvanometer
- CDuddle galvanometer
- DSpot ballistic galvanometer
10.Instrument transformers are
- APotential transformers
- BCurrent transformers
- CBoth (a) and (b)
- DPower transformers
11.An instrument transformer is used to extend the range of
- AInduction instrument
- BElectrostatic instrument
- CMoving coil instrument
- DAny of the above
12.Wattmeter cannot be designed on the principle of
- AElectrostatic instrument
- BThermocouple instrument
- CMoving iron instrument
- DElectrodynamic instrument
13.In an energy meter braking torque is produced to
- ASafe guard it against creep
- BBrake the instrument
- CBring energy meter to stand still
- DMaintain steady speed and equal to driving torque
14.Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to
- AImprove its ventilation
- BEliminate creeping at no load
- CIncrease its deflecting torque
- DIncrease its braking torque
15.Vector voltmeter is used to measure
- AAmplifier gain and phase shift
- BFiller transfer function
- CComplex insertion loss
- DAll of the above
16.The principle of vector voltmeter is based on
- AThat it works on the principle of complex variation
- BThat it measures the response of linear ramp voltage
- CSame as digital meter
- DThat it measures the amplitude of a single at two points and at the same time measures their phase difference
17.To measure radio frequency, the suitable frequency meter is
- AWeston frequency meter
- BReed vibrator frequency meter
- CHeterodyne frequency meter
- DElectrical resonance frequency meter
18.Potentiometer is a
- ACalibrating instrument
- BComparison instrument
- CIndicating instrument
- DIntegrating instrument
19.Which of the following instruments can be made using magnetic effect?
- AWattmeters
- BEnergy meters
- CVoltmeter
- DAll of the above
20.In instruments the tern ?artificial aging? is associated with
- APermanent with
- BDamping
- CSprings
- DControlling torque