Process degree of freedom indicates __________ number of controllers to be used.

The average temperature for the first 4- days of a week is 40.2-degree Celcius and that of the last 4 days is 41.3-degree Celcius If the average temperature for the whole week is 40.6-degree Celcius then the temperature on the fourth day is-

A

38.5 Degree Celcius

B

40.8 Degree Celcius

C

41.3 Degree Celcius

D

41.8 Degree Celcius

Stabilising time for the controllers is the time required for the response to reach __________ percent of its ultimate value.

A

63.2

B

87.5

C

95

D

100

On-off controllers are normally used for

A

Low loads

B

Temperature changes

C

Flow rate changes

D

None of these

Positioning controllers are used for

A

Low loads

B

Temperature changes

C

High loads

D

Flow rate changes

Computer-based controllers:

A

should be built in a modular fashion wherever possible

B

are very difficult to change

C

are very flexible

D

(a) and (c) above

E

None of the above

Analog and digital controllers:

A

cost the same to build

B

accept the same input signals

C

can be changed with equal case

D

All of the above

E

None of the above

Today, programmable controllers:

A

are more powerful then the first controllers on the market

B

are relatively low cost compared with the original digital equipment available for industrial control

C

can be cost effective even when replacing just a few relays

D

All of the above

E

None of the above

Which of the following controllers has maximum offset?

A

P-controller

B

P-I controller

C

P-D controller

D

P-I-D controller

Which of the following controllers has the least maximum deviation?

A

P-controller

B

P-I controller

C

P-I-D controller

D

P-D controller

Degree of freedom for leaching and solvent extraction process is

A

1

B

3

C

0

D

2

Process degree of freedom indicates __________ number of controllers to be used.

Related Questions