200 Important Measurement and instrumentation MCQ Question and Answer | PDF Free Download
1.The sensitivity accuracy of an instrument depends on
- AFrequency response
- BAmplitude distortion
- CHysteresis
- DTemperature variations
2.The sensitivity inaccuracy of an instrument does not depend on
- AFrequency response
- BHysteresis
- CAmplitude distortion
- DAll of the above
3.The error when reading at half-scale in an instrument is
- AEqual to half of full-scale error
- BEqual to full-scale error
- CLess than full-scale error
- DGreater than full-scale error
4.The reliability of an instrument refers to
- AThe extent to which the characteristics remain linear
- BThe life of the instrument
- CThe degree to which the repeatability continues to remain within specific limits
- DAll of the above
5.Damping in an instrument provides
- ACounter torque to deflection torque
- BGood accuracy
- CBraking action on a meter pointer
- DStarting torque on the meter pointer
6.Hysteresis is an instrument means
- AThe inaccuracy due to change in temperature
- BThe reliability of the instrument
- CThe repeatability of the instrument
- DThe change in same reading when input is first increased and then decreased
7.Which of the following instruments has the best accuracy?
- AThermocouple
- BMoving-coil
- CMoving-iron
- DRectifier type
8._____________ damping method is common in moving coil instruments.
- AEddy current
- BFluid
- CSpring
- DAir
9.In an ammeter the shunt resistance is usually ___________ meter resistance.
- AEqual to
- BLess than
- CGreater than
- DOf any value
10.The static error band of an instrument implies
- AThe error introduced in low varying inputs
- BThe error produced when the pen is stopped at some deflection
- CThe accuracy of the instrument
- DThe irrepeatibility of the instrument
11.An electrodynamic meter can be used to measure
- AAC voltages
- BDC voltages
- CBoth (a) and (b)
- DNone of the above
12.Which of the following is the merit of a moving iron instrument?
- AIt can be used under severe overload conditions
- BIt has linear scale
- CIt can be used at high frequencies
- DIts current sensitivity is high
13.Which of the following will happen if a voltmeter is connected like an ammeter in series to the load?
- AThere will be almost no current in the circuit
- BThe measurement will be too high
- CThe meter will burn out
- DA very high current will flow
14.A multimeter consists of
- AVoltmeter and current meter
- BVoltmeter and ohmmeter
- CCurrent meter and ohmmeter
- DVoltmeter, current meter and ohmmeter
15.The minimum number of wattmeters required to measure power in an unbalanced three-wire system is
- AOne
- BTwo
- CThree
- DFour
16.The total power delivered to a three-phase load is equal to
- AAlgebraic sum of two-wattmeter readings
- BAlgebraic difference of two-watt meters readings
- CVectorial sum of two-wattmeter readings
- DVectorial difference of two-watt meters readings
17.An induction wattmeter measures
- AOnly the true power
- BThe reactive power
- CThe apparent power
- DThe true power and the reactive power
18.The instrument used for the measurement of power at 500 MHz is
- ACompensated wattmeter
- BElectrodynamometer wattmeter
- CBolometer
- DNone of the above
19.The reed frequency meter is essentially a
- ADeflection measuring system
- BVibrational measuring system
- COscillatory measuring system
- DRecording measuring system
20.The Q-meter works on the principle of
- ASelf-inductance
- BMutual inductance
- CSeries resonance circuit
- DParallel resonant circuit