Chemical Engineering - Process Control and Instrumentation

21. 

Thermal conductivity measurement com-prises the working principle of a

A. CO2 analyser
B. polarimeter
C. spectrometer
D. chromatograph

Answer: Option A

Explanation:

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22. 

Response of a system to a sinusoidal input is called __________ response.

A. impluse
B. unit step
C. frequency
D. none of these

Answer: Option C

Explanation:

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23. 

The closed loop pole of a stable second order system could be

A. both real and positive.
B. complex conjugate with positive real parts.
C. both real and negative.
D. one real positive and the other real negative.

Answer: Option C

Explanation:

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24. 

Smoke density of the flue gas going out of the chimney is measured by a

A. polarograph
B. thermal conductivity meter
C. photo electric cell
D. chromatograph

Answer: Option C

Explanation:

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25. 

Transfer function of transportation lag is

A. eTS
B. e-TS
C.
D. none of these

Answer: Option B

Explanation:

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