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Process Control and Instrumentation

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

Bright sunshine period
Diffuse radiation
None of these
Beam radiation

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

Resistance
Mercury in glass
Vapor pressure
Bimetallic

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Process Control and Instrumentation
Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.

< 100
> 0
> 800
< 0

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Process Control and Instrumentation
For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a

High thermal conductivity
All of these
Small specific heat
Large area but small mass

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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)

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

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Process Control and Instrumentation
Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.

Fahrenheit
Reaumer
Kelvin
Centigrade

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