1) If the two input waveforms of equal amplitude and 90 degree phase difference are applied to the CRO then the Lissajous patterns obtained will be
a. Straight line tilted at 45 degree with respect to X-axis
b. Circle
c. Ellipse
d. Vertical straight line
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2) 
The phase difference between two waveforms in the above figure is given by
a. ∅ = sin-1 Y1/Y2
b. ∅ = sin-1 Y2/Y1
c. ∅ = tan-1 Y2/Y1
d. ∅ = tan-1 Y1/Y2
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3) Function of transducer is to convert
a. Electrical signal into non electrical quantity
b. Non electrical quantity into electrical signal
c. Electrical signal into mechanical quantity
d. All of these
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Answer
Explanation
Related Ques
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ANSWER: Non electrical quantity into electrical signal
Explanation:
No explanation is available for this question!
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4) Potentiometer transducers are used for the measurement of
a. Pressure
b. Displacement
c. Both (a) and (b)
d. None of these
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5) Thermistor is a transducer. Its temperature coefficient is
a. Negative
b. Positive
c. Zero
d. None of these
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6) Strain gauge is a
a. Active device and converts mechanical displacement into a change of resistance
b. Passive device and converts electrical displacement into a change of resistance
c. Passive device and converts mechanical displacement into a change of resistance
d. Active device and converts electrical displacement into a change of resistance
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Answer
Explanation
Related Ques
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ANSWER: Passive device and converts mechanical displacement into a change of resistance
Explanation:
No explanation is available for this question!
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7) Constantan is used for measurement of dynamic strains. It is an alloy of
a. Copper and Aluminium
b. Nickel and molybdenum
c. Nickel and chromium
d. Copper and nickel
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8) The linear variable differential transformer transducer is
a. Inductive transducer
b. Non-inductive transducer
c. Capacitive transducer
d. Resistive transducer
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9) The transducer used for the measurements is/are
a. Resistance temperature detectors
b. Thermistors
c. Ultrasonic
d. All of these
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10) If at one end, the two wires made of different metals are joined together then a voltage will get produced between the two wires due to difference of temp between the two ends of wires. This effect is observed in
a. Thermocouples
b. Thermistors
c. RTD
d. Ultrasonics
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11) For the measurement of pressure the instruments used can be
a. Mechanical
b. Electro-mechanical
c. Electronic
d. All of these
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12) With the increase in the intensity of light, the resistance of a photovoltaic cell
a. Increases
b. Decreases
c. Remains same
d. None of these
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13) If the displacement is measured with strain gauge then the number of strain gauge normally required are
a. One
b. Two
c. Three
d. Four
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14) A capacitive pressure sensor has a typical measurement uncertainty of
a. ± 0.2%
b. ± 0.4%
c. ± 0.1%
d. ± 0.8%
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15) The instruments used for the measurement of pressure is / are
a. Bellows
b. Diaphragms
c. Fiber optic pressure sensors
d. All of these
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16) Bourdon tube is used for the measurement of gauge pressure of
a. Gas
b. Liquid fluid
c. Both (a) and (b)
d. None of these
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17) Dead weight gauge is used for the measurement of pressure of
a. About 1000 bar
b. About 2000 bar
c. About 5000 bar
d. About 7000 bar
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18) The ionization gauge an instrument used for the measurement of
a. Very low pressure
b. Medium pressure
c. High pressure
d. Very high pressure
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19) When visual indication of pressure level is required then the instrument generally used is
a. Monometers
b. Diaphragm sensors
c. Bourdon tube
d. Resonant wire device
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20) For the measurement of high pressure with high accuracy the device used is
a. Manganin wire pressure
b. Ionization gauge
c. Dead weight gauge
d. Bourdon tubes
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21) Advantage of passive instrument is
a. It does not need power supply
b. Cheap
c. Sensitive
d. Accurate
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22) In McLeod gauge,
a. High pressure fluid is expanded to a low pressure which is read by the monometer technique
b. Low pressure fluid is compressed to a high pressure which is read by the bourdon technique
c. High pressure fluid is expanded to a low pressure which is read by the bourdon technique
d. Low pressure fluid is compressed to a high pressure which is read by the monometer technique
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Answer
Explanation
Related Ques
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ANSWER: Low pressure fluid is compressed to a high pressure which is read by the monometer technique
Explanation:
No explanation is available for this question!
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23) The rate at which fluid flows through a closed pipe can be determined by
a. Determining the mass flow rate
b. Determining the volume flow rate
c. Either (a) or (b)
d. None of these
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24) Conveyor-based method is used for the measurement of the flow of
a. Solids
b. Liquid
c. Gas
d. All of these
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25) For the measurement of flow rate of liquid, the method used is
a. Conveyor-based methods
b. Bourdon tube
c. Coriolis method
d. Thermal mass flow measurement
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26) The devices used for flow obstruction is/are
a. Orifice plate
b. Venturi tube
c. Flow nozzle and dall flow tube
d. All of these
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27) The device which is used for making temporary measurements of flow is
a. Venturi
b. Dull flow tube
c. Orifice plate
d. Pitot static tube
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28) For the measurement of flow the cheapest device is
a. Venturi
b. Dall flow tube
c. Flow nozzle
d. Pitot static tube
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29) The instrument which is not suitable for the application in automatic control scheme
a. Rotameters
b. Pitot static tube
c. Rotary piston meter
d. Orifice plate
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30) Example for positive displacement meter is
a. Variable area flow meter
b. Turbine meters
c. Rotary piston meter
d. Venturi
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