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PROCESS CONTROL AND INSTRUMENTATION

Process Control and Instrumentation
Which of the following thermocouples is capable of measuring a temperature of -50°C?

Chromel - alumel
Iron-constantan
Platinum - platinum + rhodium
Copper - constantan

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Process Control and Instrumentation
Which of the following is not a variable area flow meter?

Rotameter
Magnetic flow meter
Orifice and tapered plug meter
Piston type meter

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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
1064.43
1261.93

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Process Control and Instrumentation
Thermal conductivity cell is the primary element of a/an __________ analyser.

Carbon monoxide
Sulphur dioxide
Carbon dioxide
Oxygen

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Process Control and Instrumentation
Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their

Low flash point
Low thermal conductivity
Low electrical conductivity
High viscosity index

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