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Process Control and Instrumentation

Process Control and Instrumentation
The unit of 'time constant' of a system is the same as that of

Time
None of these
(time)⁻¹
Velocity

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Process Control and Instrumentation
Which of the following is not a second order instrument?

None of these
Mercury in glass thermometer with covering
Pressure gauge with one bellow, two tubes and a tank
Bare mercury in glass thermometer

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Process Control and Instrumentation
A pyrheliometer is an instrument used for measuring the

Bright sunshine period
None of these
Diffuse radiation
Beam radiation

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Process Control and Instrumentation
Which of the following is not classified as a thermo electric pyrometer

Resistance thermometer
Thermocouple
Optical pyrometer (disappearing filament type)
Radiation pyrometer

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Process Control and Instrumentation
Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively

0° & 80°
- 273° & 80°
32° & 460°
32° & 80°

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Process Control and Instrumentation
Dead zone in an instrument must be less than __________ percent of the scale.

4
8
1.5
0.2

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