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Process Control and Instrumentation

Process Control and Instrumentation
Liquid levels in autocalves are measued by

None of these
Differential float type manometer
Glass gauge
Simple float

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Process Control and Instrumentation
Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an

Hot wire anemometer
Orificemeter
Magnetic flow meter
Venturimeter

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Process Control and Instrumentation
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the

Alcohol filled thermometer
Mercury in glass thermometer
Optical pyrometer
Iron-constantan thermocouple

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Process Control and Instrumentation
Which of the following can not measure a temperature of 1600°C ?

Thermocouple
Radiation pyrometer
Platinum resistance thermometer
Photo-electric pyrometer

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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
550
700

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Process Control and Instrumentation
Liquid discharge from a tank or reservoir can not be measured by

Weirs
Notches
Orificemeters
Mouthpieces

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