Chemical Engineering - Process Control and Instrumentation

16. 

Which of the following is a desirable characteristic of an instrument ?

A. High drift
B. High fidelity
C. High measuring lag
D. Poor reproducibility

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

17. 

The operation of a rotameter is based on

A. variable flow area.
B. rotation of a turbine.
C. pressure drop across a nozzle.
D. pressure at a stagnation point.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

18. 

The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.

A. chromel-alumel
B. iron-constantan
C. platinum-platinum/rhodium
D. none of these.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

19. 

Instrumentation in a plant offers the advantage of

A. greater safety of operation
B. better quality of product
C. greater operation economy
D. all (a), (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

20. 

Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ?

A. Radiation/infrared pyrometer
B. Filled system thermometer
C. Mercury in glass thermometer
D. Thermo electric pyrometer

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.