Mechanical Engineering Measurements



Multiple Choice Questions (MCQs)

1   Closeness with true value is called as
    (A)   Precision
    (B)   Repeatability
    (C)   Accuracy
    (D)   Readability

2   The element which converts one form of signal into another form is called as
    (A)   Transmitter
    (B)   Transducer
    (C)   Transformer
    (D)   Translator

3   Making, checking & adjusting of instrument scale is called as
    (A)   Correction
    (B)   Precision
    (C)   Resolution
    (D)   Calibration

4   Variable area meter is also called as
    (A)   Pyrometer
    (B)   Rotameter
    (C)   Thermometer
    (D)   Anemometer

5   The sensitive element in hair hygrometer is
    (A)   Carbon slice
    (B)   Human hair
    (C)   Vibrating tube and sensor
    (D)   Silicon jelly

6   Overshoot is
    (A)   Ratio of change of output signal to input signal
    (B)   Minimum departure of pointer on steady state
    (C)   Maximum departure of pointer above steady state
    (D)   None of the above

7   Sling psychrometer is used for measurement of
    (A)   Dry bulb temperature
    (B)   Relative humidity
    (C)   Wet bulb temperature
    (D)   None of the above

8   Eddy current dynamometer is used for
    (A)   Acoustic measurement
    (B)   Cutting force measurement
    (C)   Angular measurement
    (D)   Shaft power measurement

9   Which one of the following is used for vibration measurement?
    (A)   Humistor
    (B)   Accelerometer
    (C)   Sling psychrometer
    (D)   Pyrometer

10   Ultrasonic flow meter works on
    (A)   Propagation of sound wave
    (B)   Propagation of light wave
    (C)   Change of resistivity
    (D)   Change of mutual inductance

11   Electrodynamic microphone is used for measurement of
    (A)   Sound measurement
    (B)   Liquid level
    (C)   Strain
    (D)   Water flow

12   Pressure measurement using Bourdon tube pressure gauge is example of
    (A)   Direct measurement
    (B)   Indirect measurement
    (C)   Pressure control measurement
    (D)   Flow control measurement

13   The degree of closeness with which the measuring instrument indicates or records a changing value of measurement variable input is called as
    (A)   Fidelity
    (B)   Hysteresis
    (C)   Sensitivity
    (D)   Precision

14   Photo voltaic cell is example of
    (A)   Passive transducer
    (B)   Elastic transducer
    (C)   Active transducer
    (D)   Resistive transducer

15   In Bourdon tube pressure gauge pressure is connected to
    (A)   Free end of Bourdon tube
    (B)   Both ends together
    (C)   None of the above
    (D)   Fixed end of Bordon tube

16   The reading is taken in optical pyrometer when
    (A)   Filament is too bright
    (B)   Filament breaks
    (C)   Filament disappears
    (D)   Filament is too dark

17   Automobile speedometer is
    (A)   Revolution counter
    (B)   Slipping clutch tachometer
    (C)   Centrifugal force tachometer
    (D)   Drag cup tachometer

18   Which instrument is contact less temperature measuring instrument?
    (A)   Radiation pyrometer
    (B)   Pressure gauge thermometer
    (C)   Platinum resistance thermometer
    (D)   Thermocouple

19   Which instrument works on principle of mutual inductance
    (A)   Shaft encoder
    (B)   LVDT
    (C)   Quartz thermometer
    (D)   Ultrasonic flowmeter

20   When instrument gives different reading for same value of input while measured in upscale and in downscale the error is called as
    (A)   Hysteresis
    (B)   Zero drift
    (C)   Random error
    (D)   Environmental error

21   The difference between true value and measured value is called as
    (A)   Backlash
    (B)   Error
    (C)   Resolution
    (D)   Dead zone

22   Absolute pressure is
    (A)   Gauge pressure
    (B)   Atmospheric pressure +gauge pressure
    (C)   Atmospheric pressure – gauge pressure
    (D)   None of the above

23   LVDT works on
    (A)   AC
    (B)   DC
    (C)   Both AC & DC
    (D)   None of the above

24   The name of instrument where we take readings of dry bulb and wet bulb temperature is
    (A)   Quartz thermometer
    (B)   Hair hygrometer
    (C)   Sling psychrometer
    (D)   Strain gauge

25   Following instrument is used for speed measurement
    (A)   Bellow
    (B)   Pirani gauge
    (C)   Stroboscope
    (D)   Thermocouple

26   Following is undesirable characteristic of instrument
    (A)   Accuracy
    (B)   Measuring lag
    (C)   Sensitivity
    (D)   Precision

27   What is the span of the instrument having range -100 to +100?
    (A)   0
    (B)   200
    (C)   100
    (D)   None of the above

28   The FET IS
    (A)   Fast forward transformation
    (B)   Fast Fourier transformation
    (C)   Fast force transducer
    (D)   None of the above

29   In which instrument readability is better
    (A)   Analog
    (B)   Digital
    (C)   Mechanical
    (D)   None of the above

30   When two dissimilar metals are joined to form a loop and two junctions. If junctions are kept at different temperature emf is generated. This statement is
    (A)   Faradays law
    (B)   Seebeck effect
    (C)   Pyrometry
    (D)   Pascals law

31   Constantan is alloy of
    (A)   Nickel + chromium
    (B)   Copper + nickel
    (C)   Iron + nickel
    (D)   Nickel + chromium

32   Thermistor is used for measurement of
    (A)   Steam pressure
    (B)   Temperature
    (C)   Velocity of flowing fluid
    (D)   None of the above

33   Pressure actuated thermometer is used for measurement of
    (A)   Pressure
    (B)   Temperature
    (C)   Pressure and temperature
    (D)   None of the above

34   In case of Rota-meter the float material should be
    (A)   Heavier than fluid to be metered
    (B)   Lighter than fluid to be metered
    (C)   Equal specific weight
    (D)   None of the above

35   In load-cell there is
    (A)   RTD
    (B)   RVDT
    (C)   Strain gauge
    (D)   LVDT

36   In bimetallic thermometer, the bimetallic strip consists of
    (A)   Two different nonmetals strips
    (B)   Two different metals strips joined together
    (C)   Two metal strips of same material
    (D)   None of the above

37   Dynamo-meter is used for measurement of
    (A)   Torque Measurement
    (B)   Permeability
    (C)   Force
    (D)   Angular measurements

38   Sensitivity depends upon
    (A)   Output and input
    (B)   Only output
    (C)   Only input
    (D)   None of the above

39   The physical form of unit is called as
    (A)   Calibration
    (B)   Error detector
    (C)   Dummy gauge
    (D)   Standard

40   Precision depends upon
    (A)   Accuracy
    (B)   Conformity of successive readings
    (C)   Range
    (D)   Span

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