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Process Control and Instrumentation

Process Control and Instrumentation
Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.

Photoelectric
Radiation
Optical
None of these

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Process Control and Instrumentation
A manometer measures the __________ pressure.

Absolute
Atmospheric
None of these
Gauge

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Process Control and Instrumentation
The amplitude ratio for the sinusoidal response of __________ is < 1.

Second order system
First order system
None of these
Transportation lag

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Process Control and Instrumentation
__________ thermometer can not measure sub-zero (< 0° C) temperature,

Mercury in glass
Bimetallic
Vapor pressure
Resistance

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Process Control and Instrumentation
Dead zone is the

Same as time constant
None of these
Same as transportation lag
Maximum change in the variable that does not change the reading of the instrument

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change?

Methyl alcohal
Carbon-tetrachloride
Mercury
Water

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