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Process Control and Instrumentation

Process Control and Instrumentation
Bourdon tube is never made of

Monel metal
Cast iron
Stainless steel
Phosphor bronze

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Process Control and Instrumentation
Platinum resistance thermometer can be used upto antimony point which is __________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure.

961.93
630.74
1261.93
1064.43

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

Cipolletti weir
V-notch
Orifice meter
Rectangular weir

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Process Control and Instrumentation
Nichol's chart deals with

R. vs. phase lag of second order
Closed loop values vs. open loop values
Frequency response values of controllers
R. vs. phase lag of first order

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Process Control and Instrumentation
Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a

Thermocouple
Mercury in glass thermometer
Vapor pressure thermometer
Reistance thermometer

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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
700
550
250

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