Measurement And Instrument Theory - 5 - MCQs with answers

Measurement And Instrument Theory - 5 - MCQs with answers

Q1. For a second order instrument if the value of the damping ratio is equal to zero, then the

A. Output will exhibit constant amplitude oscillation

B. Initially output will be oscillatory and gradually it will die down

C. Initially output will be oscillatory and gradually amplitude of oscillation will increase

D. Output does not exhibit any oscillations

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Q2. Commercial accelerometer, which is a second order instrument is generally designed for the damping ratio of the range of

A. 0.2 – 0.4
B. 0.6 – 0.8
C. 0.707 – 1
D. 1 – 1.5

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Q3. The process of measurement

A. Always disturbs the system being measured
B. It may or may not disturb the system being measured
C. Never disturbs the system being measured
D. None of these

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Q4. The difference between the measured value and the true value is known as

A. Relative error
B. Random error
C. Absolute error
D. Systematic error

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Q5. In the systematic errors, the errors in the output of the measurement system are

A. All the errors will be positive

B. All the errors will be negative

C. Either all the errors will be positive or all the errors will be negative

D. None of these

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Q6. Systematic errors in a measurement system are caused by

A. System disturbance during measurement
B. Effect of environmental changes
C. Use of uncalibrated instruments
D. All of these

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Q7. In bridge circuit, the impedance of the instrument measuring the output voltage must be

A. Equal to the component resistance of the circuit

B. Very large compared to the component resistance of the circuit

C. Very small compared to the component resistance

D. Less than compared to the component resistance but not very small

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Q8. If the impedance of the instrument measuring the output voltage of the bridge circuit is less than the component resistance then

A. The instrument will load the bridge circuit
B. The instrument will draw current from the circuit
C. Supply current to the circuit
D. Both (a) & (b)
E. None of the above

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Q9. In a moving coil voltmeter, the input resistance of the meter can be increased by

A. Increasing the number of turns in the coil

B. Decreasing the number of turns in the coil

C. Using the same number of coil turns made up of high resistance material

D. Both (a) & (c)

E. None of the above

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Q10. The magnitude of environment-induced variation from the specified calibration condition is quantified by

A. Sensitivity drift
B. Zero drift
C. Backlash
D. Both (a) & (b)
E. None of the above

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