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Process Control and Instrumentation

Process Control and Instrumentation
The pressure sensing element of elastic type pressure gauge is never made in the form of a

Bourdon tube
Diaphragm
Bellow
Strip

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Process Control and Instrumentation
A manometer measures the __________ pressure.

Gauge
None of these
Absolute
Atmospheric

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Process Control and Instrumentation
Silver point temperature is __________ °C.

960.5
1060.5
860.5
760.5

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Process Control and Instrumentation
When a bare thermocouple is covered by a protective sheath, the response becomes

Faster and oscillatory
Slower and oscillatory
Faster and non-oscillatory
Slower and non-oscillatory

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Process Control and Instrumentation
A system with a double pole at the origin is unstable since the corresponding term in the time domain

Grows linearly with time
Decays linearly with time
Grows exponentially with time
Is a constant

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Process Control and Instrumentation
Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature

Emf produced is very low of the order of microvolt
Embrittlement of iron occurs
Rusting of iron takes place
Both B and C Here

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