Chemical Engineering - Process Control and Instrumentation

16. 

An ideal PID controller has the transfer function . The frequency at which the magnitude ratio of the controller is 1, is

A. 0.5/0.2
B. 0.2/0.5
C. 0.2 x 0.5
D. 1/0.2 x 0.5

Answer: Option D

Explanation:

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

17. 

The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly

A. linear
B. non-linear
C. parabolic
D. hyperbolic

Answer: Option A

Explanation:

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

18. 

Alphatron measures pressure __________ microns.

A. < 1
B. < 3
C. > 3
D. < 0.1

Answer: Option C

Explanation:

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

19. 

What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system ?

A. 1
B. >1
C. < 1
D. none of these

Answer: Option C

Explanation:

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

20. 

The unit step response of the transfer functionreaches its final steady state assymptotically after

A. a monotonic increase.
B. a monotonic decrease.
C. initially increasing and then decreasing.
D. increasing decreasing and then increasing.

Answer: Option A

Explanation:

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