Chemical Engineering - Process Control and Instrumentation

11. 

Typical specifications for design stipulates the gain margin and phase margin to be respectively

A. > 1.7 and > 30°
B. < 1.7 and > 30°
C. < 1.7 and < 30°
D. > 1.7 and < 30°

Answer: Option A

Explanation:

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12. 

Working principle of radiation pyrometer is based on the

A. Wien's law
B. Kirchoffs law
C. Stafan-Boltzman law
D. Seebeck effect

Answer: Option C

Explanation:

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13. 

Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference ?

A. Peltier effect
B. Thomson effect
C. Seebeck effect
D. none of these

Answer: Option B

Explanation:

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14. 

Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.

A. Kelvin
B. Centigrade
C. Fahrenheit
D. Reaumer

Answer: Option C

Explanation:

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15. 

In a single tank system, the transfer function of level to inlet flow rate is

A. R/TS
B. R/(TS + 1)
C. l(TS + l)
D. 1/TS

Answer: Option B

Explanation:

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