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PROCESS CONTROL AND INSTRUMENTATION

Process Control and Instrumentation
Photoelectric pyrometers are suitable in the temperature range of __________ °C.

400-1600
800-1600
800-2500
400-1000

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Process Control and Instrumentation
A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.

-38.9
-11.9
-80.9
-60.9

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Process Control and Instrumentation
Mercury thermometer is commonly used for low temperature measruement. The freezing point and boiling point of mercury are respectively __________ °C.

- 10 and 425
- 39 and 350
- 79 and 395
- 51 and 439

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Process Control and Instrumentation
Load cells are used for the measurement of

Strain
Stress
Velocity
Weight

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Process Control and Instrumentation
Thermistors are used in __________ devices.

Temperature compensating
Temperature measuring
Voltage measuring
Both B & C

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