Measurement And Instrument Theory - 3 - MCQs with answers

Measurement And Instrument Theory - 3 - MCQs with answers

Q1. The output reading of an instrument is

A. Linearly proportional to the quantity being measured
B. Inversely proportional to the quantity being measured
C. Exponentially proportional to the quantity being measured
D. Not related to the quantity being measured

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Q2. The sensitivity of a measurement is a measure of

A. Change in instrument output when the quantity being measured changes by a given amount

B. Closeness of output readings for the same input when there are changes in the method of measurement

C. Ratio of output to the input

D. Closeness of output reading of instrument to the true value

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Q3. A speedometer typically has a threshold of about 15 km/hr. If the car starts from rest and accelerates, the speedometer will

A. Start reading from the moment the car starts
B. Start reading when the speed reaches 15 km/hr
C. Start reading when the speed reaches 30 km/hr
D. None of these

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Q4. In an instrument torque/weight ratio is known as

A. Sensitivity
B. Accuracy
C. Linearity
D. Fidelity

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Q5. If one meter A requires 80 mA to give full scale deflection and another meter B requires 60 mA to give full scale deflection, then the

A. Meter A is more sensitive
B. Both meters are equally sensitive
C. Meter B is more sensitive
D. Insufficient data

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Q6. To produce a change in deflection of 1.5 mm of the galvanometer of Wheatstone bridge, a change of 5Ω in the unknown arm of bridge is required. The sensitivity is

A. 0.2 mm/ Ω
B. 0.3 mm/ Ω
C. 0.4 mm/ Ω
D. 0.5 mm/ Ω

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Q7. Resolution of an instrument is specified as

A. Absolute value
B. Percentage of full scale deflection
C. Either (a) or (b)
D. None of these

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Q8. If a voltmeter can measure up to 150 V and it has 150 scale divisions where each division can read to 3/4 divisions. Then the resolution of the voltmeter is

A. 0.5 V
B. 0.25 V
C. 0.75 V
D. 1 V

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Q9. The smallest change which can be measured by the transducer of the range of 0 to 150 N force and resolution of 0.1% of full scale is

A. 0.1 N
B. 0.15 N
C. 0.3 N
D. 0.35 N

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Q10. Zero drift or bias describes the effect

A. Where the zero reading of an instrument is modified by a change in ambient conditions

B. Where the zero reading is achieved by increasing sensitivity

C. Where the zero reading is achieved by increasing linearity

D. None of these

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