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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

The characteristic equation for the control system with a closed loop transfer function G1/1 + G2 is given by 1 + G2 = 0. The characteristic equation for the control system_________________?
A Depends only upon the open loop transfer function
B Determines its stability
C Is the same for set point or load changes
D All A , B & C.
Correct Answer: All A , B & C.
Response of a system to a sinusoidal input is called _____________ response?
A Impulse
B Unit step
C Frequency
D None of these
Correct Answer: Frequency
Polarograph is meant for the analysis of __________________?
A Gaseous mixture
B Miscible liquids
C Solids
D Isotopes
Correct Answer: Solids
Use of I-control along with P-control facilitates ?
A Elimination of offset
B Reduction of offset
C Reduction of stability time
D None of these
Correct Answer: Elimination of offset
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
Correct Answer: Chromel-constantan
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 monotonically decrease
D Poles of the closed loop transfer function should lie in the right half of the complex plane
Correct Answer: Poles of the closed loop transfer function should lie in the left half of the complex plane
The ____________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature ?
A Pressure
B Volume
C Viscosity
D All A., B. and C.
Correct Answer: All A., B. and C.
Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an ?
A Insulator
B Conductor
C Solid semi-conductor
D Liquid semi-conductor
Correct Answer: Solid semi-conductor
Thermistors are used in ____________ devices?
A Voltage measuring
B Temperature measuring
C Temperature compensating
D Both B. & C.
Correct Answer: Both B. & C.
The ____________ of a vapor pressure thermometer is a secondary element ?
A Pointer
B Bourdon tube
C Bulb
D None of these
Correct Answer: Bourdon tube
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