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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?

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

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

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

1064.43
961.93
1261.93
630.74

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

Carbon dioxide
Oxygen
Carbon monoxide
Sulphur dioxide

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

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

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