Process Control And Instrumentation MCQ Questions & Answers

Process Control And Instrumentation MCQ Questions & Answers | Chemical Engineering

Learn Process Control And Instrumentation MCQ questions & answers are available for a Chemical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Process Control And Instrumentation MCQ question is the important chapter for a Chemical Engineering and GATE students. Page-1 section-3

When the damping co-efficient (ξ) is unity, the system is

A) Overdamped B) Critically damped C) Underdamped D) Highly fluctuating

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Answer & Solution

Answer: Option B

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For a feed back control system to be stable, the

A) Roots of the characteristic equation should be real B) Poles of the closed loop transfer function should lie in the left half of the complex plane C) Bode plots of the corresponding open loop transfer function should monotoni-cally decrease D) Poles of the closed loop transfer function should lie in the right half of the complex plane

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Answer & Solution

Answer: Option B

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In a closed loop system, the process to be controlled is an integrating process with transfer function $$\frac{1}{{2{\text{s}}}}.$$ The controller proposed to be used in an integral controller with transfer function $$\frac{1}{{{{\text{T}}_1}{\text{s}}}}.$$ When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit

A) Overdamped response B) Underdamped response C) Undamped response D) Unstable response

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Answer & Solution

Answer: Option B

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Which of the following controllers has maximum offset?

A) P-controller B) P-I controller C) P-D controller D) P-I-D controller

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Answer & Solution

Answer: Option A

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Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference?

A) Peltier effect B) Thomson effect C) Seebeck effect D) None of these

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Answer & Solution

Answer: Option B

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Flow rate of a river is measured by a/an

A) Pitot tube B) Vane meter C) Kennison nozzle D) Open weir

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Answer & Solution

Answer: Option B

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Composition of alloys can be determined by

A) Polarograph B) Chromatograph C) Refractrometer D) None of these

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Answer & Solution

Answer: Option A

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In a single tank system, the transfer function of level to inlet flow rate is

A) R/TS B) R/(TS + 1) C) L(TS + l) D) 1/TS

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Answer & Solution

Answer: Option B

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The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches

A) -1 B) 0 C) 1 D) ∞

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Answer & Solution

Answer: Option D

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

A) Pointer B) Bourdon tube C) Bulb D) None ofthese

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Answer & Solution

Answer: Option B

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