Process Control and Instrumentation - Section 1

Directions to Solve

Process Control and Instrumentation - Section 1

These are the problems based on process control
and instrumentation and there are many MCQs available in this section to solve.

1.

In a shell and tube heat exchanger, the flow rate of heating/cooling fluid is the __________ variable.

A.	load
B.	controlled
C.	manipulated
D.	none of these

Answer: Option C

Explanation:

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

2.

The second order system with the transfer function 383-609-1 has a damping ratio of

A.	2.0
B.	0.5
C.	1.0
D.	4.0

Answer: Option B

Explanation:

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3.

Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?

A.	Seebeck effect
B.	Peltier effect
C.	Joule heating effect
D.	Thomson effect

Answer: Option B

Explanation:

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4.

Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is

A.	chromel-alumel
B.	iron-constantan
C.	platinum-platinum+rhodium
D.	either (a), (b) or (c)

Answer: Option C

Explanation:

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5.

The __________ of a vapor pressure thermometer is a secondary element.

A.	pointer
B.	Bourdon tube
C.	bulb
D.	none ofthese

Answer: Option B

Explanation:

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6.

Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a

A.	thermocouple
B.	reistance thermometer
C.	mercury in glass thermometer
D.	vapor pressure thermometer

Answer: Option A

Explanation:

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7.

For an input forcing function, X(t) = 2t², the Laplace transform of this function is

A.	2/s2
B.	4/s2
C.	2/s3
D.	4/s3

Answer: Option D

Explanation:

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8.

Select the correct statement from the following.

A.	The frequency response of a pure capacity process is unbounded.
B.	The phase lag of a pure time delay system decreases with increasing frequency.
C.	The amplitude ratio of a pure capacity process is inversely proportional to frequency.
D.	The amplitude ratio of a pure time delay system increases with frequency.

Answer: Option C

Explanation:

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

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