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Process Control and Instrumentation

Process Control and Instrumentation
Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm³.

100
50
1
10

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Process Control and Instrumentation
Configuration of Bourdon spring tube is never made of __________ shape.

Helical
Spiral
Circular
Semi-circular

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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.

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

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Process Control and Instrumentation
A negative gain margin expressed in decibels means a/an __________ system.

None of these
Unstable
Stable
Critically damped

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Process Control and Instrumentation
A control system has the following transfer function F(s) = (s - 1)(s + 1)/s(s - 2)(s + 4)The initial value of the corresponding time function is

43838
44020
1
-1

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

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

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