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Process Control and Instrumentation

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

None of these
Bright sunshine period
Diffuse radiation
Beam radiation

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

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

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Process Control and Instrumentation
Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)

p/nRT
nRT/P
nRT/V
V/nRT

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Process Control and Instrumentation
__________ is undesirable in thermocouples used in industries,

Corrosion resistance
Non-linear relation of emf to temperature
Oxidation resistance
Linear relation of emf to temperature

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Process Control and Instrumentation
When the damping co-efficient (ξ) is unity, the system is

Underdamped
Critically damped
Highly fluctuating
Overdamped

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Process Control and Instrumentation
Meleoid gauge measures the __________ pressure.

Very high
Sub-atmospheric
Positive
Atmospheric

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