Chemical Engineering - Process Control and Instrumentation

36. 

Compositional analysis of __________ is done using mass spectrometer.

A. an isotope
B. natural gas
C. a solid
D. an alloy

Answer: Option A

Explanation:

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

37. 

The function of a transducer is to

A. modify the input signal.
B. amplify the input signal.
C. convert the primary signal into a more useful quantity, usually an electric impulse.
D. codify/decodify the input signal.

Answer: Option C

Explanation:

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

38. 

Nichol's chart deals with

A. A.R. vs. phase lag of first order.
B. A.R. vs. phase lag of second order.
C. closed loop values vs. open loop values.
D. frequency response values of controllers.

Answer: Option C

Explanation:

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

39. 

Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?

A. Platinum-platinum + rhodium.
B. Iron-constantan.
C. Chromel-constantan.
D. All will give the same output.

Answer: Option C

Explanation:

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

40. 

A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if

A. Kc is reduced.
B. Kc is increased.
C. integral control action is introduced.
D. derivative control action is introduced.

Answer: Option B

Explanation:

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