Chemical Engineering - Process Control and Instrumentation

46. 

The __________ of a vapor pressure thermometer is a secondary element.

A. pointer
B. Bourdon tube
C. bulb
D. none ofthese

Answer: Option B

Explanation:

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47. 

Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is

A. chromel-alumel
B. iron-constantan
C. platinum-platinum+rhodium
D. either (a), (b) or (c)

Answer: Option C

Explanation:

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48. 

Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?

A. Seebeck effect
B. Peltier effect
C. Joule heating effect
D. Thomson effect

Answer: Option B

Explanation:

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49. 

The second order system with the transfer function has a damping ratio of

A. 2.0
B. 0.5
C. 1.0
D. 4.0

Answer: Option B

Explanation:

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50. 

In a shell and tube heat exchanger, the flow rate of heating/cooling fluid is the __________ variable.

A. load
B. controlled
C. manipulated
D. none of these

Answer: Option C

Explanation:

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