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Process Control and Instrumentation

Process Control and Instrumentation
Specific gravity of a liquid can not be measured by a/an

Anemometer
Pycnometer
Specific gravity bottle
Hydrometer

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Process Control and Instrumentation
The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly

Parabolic
Linear
Hyperbolic
Non-linear

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Process Control and Instrumentation
Photoelectric pyrometers are suitable in the temperature range of __________ °C.

800-1600
400-1000
800-2500
400-1600

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Process Control and Instrumentation
Radiation thermometer can not measure the temperature

Inside a pressure vessel
Of liquid oxygen
Of an object without coming in contact with it
Of moving objects at high temperature

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Process Control and Instrumentation
Conversion formula for converting amplitude ratio (AR) into decibels is

Decibel = 20 log10 (AR)
Decibel = 20 log10 (AR)0.5
Decibel = 20 loge (AR)
Decibel = 20 loge (AR)0.5

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Process Control and Instrumentation
Which of the following is an undesirable dynamic characteristic of an instrument?

Reproducibility
Dead zone
Static error
Time lag

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