Chemical Engineering - Process Control and Instrumentation

36. 

Process degree of freedom indicates __________ number of controllers to be used.

A. the maximum
B. the minimum
C. both maximum and the minimum
D. nothing about the

Answer: Option A

Explanation:

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37. 

Characteristic equation is the denominator of __________ loop transfer function.

A. open
B. closed
C. both (a)and (b)
D. neither (a) nor (b)

Answer: Option B

Explanation:

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38. 

Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.

A. radiation
B. optical
C. photoelectric
D. none of these

Answer: Option C

Explanation:

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39. 

Polarograph is meant for the analysis of

A. gaseous mixture
B. miscible liquids
C. solids
D. isotopes

Answer: Option C

Explanation:

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40. 

Which of the following fluid flow measuring devices can measure the largest flow rate ?

A. V-notch
B. Rotameter
C. Orificemeter
D. Weir

Answer: Option D

Explanation:

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