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Process Control and Instrumentation

Process Control and Instrumentation
Liquid flow rate in an open channel can not be measured by a/an

Orifice meter
V-notch
Cipolletti weir
Rectangular weir

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Process Control and Instrumentation
Temperature measuring instruments are standardised mostly with __________ points of pure substances.

Melting
Neither A nor B Here
Both A & B Here
Boiling

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Process Control and Instrumentation
The transfer function of a pure dead time system with dead time τd is

E-τds
Eτds
Τds + 1
1/(τds + 1)

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Process Control and Instrumentation
Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury.

350
250
700
550

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Process Control and Instrumentation
The term analogous to voltage in a single tank system is the

Flow rate
Level of liquid
Heat content of the system
Liquid volume in the tank

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Process Control and Instrumentation
Alphatron measures pressure __________ microns.

< 1
< 3
> 3
< 0.1

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