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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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.

The unit step response of the transfer function 1/(s2 + 2s + 3) _______________________?

A Has a non-zero slope at the origin

B Has a damped oscillatory characteristics

C Is overdamped

D Is unstable

Review Detailed Answer

Correct Answer: Has a damped oscillatory characteristics

The operation of a Rotameter is based on ________________?

A Variable flow area

B Rotation of a turbine

C Pressure drop across a nozzle

D Pressure at a stagnation point

Review Detailed Answer

Correct Answer: Variable flow area

Which of the following fluid flow measuring devices can measure the largest flow rate ?

A V-notch

B Rotameter

C Orificemeter

D Weir

Review Detailed Answer

Correct Answer: Weir

Which of the systems having the following transfer function is stable ?

A 1/(S2 + 2)

B 1/(S2 – 2S + 3)

C 1/(S2 + 2S + 2)

D exp (-20 S)/(S2 + 2S – 1)

Review Detailed Answer

Correct Answer: 1/(S2 + 2S + 2)

What is the dynamic error in a critically damped second order instrument for a ramp input (At) ?

A 0.5 AT

B 2 AT

C √(AT)

D 1.5 AT

Review Detailed Answer

Correct Answer: 2 AT

Emf developed by a thermocouple while measuring a temperature of 400°C is 22 mV. The type of thermocouple used is ___________________?

A Chromel-alumel

B Iron-constantan

C Platinum-rhodium

D Platinum-platinum + rhodium

Review Detailed Answer

Correct Answer: Iron-constantan

An amplitude ratio of 0.1 corresponds to _____________ decibels?

A 20

B -20

C 10

D -10

Review Detailed Answer

Correct Answer: 20

Transfer function of transportation lag is___________________?

A eTS

B e-TS

C 1/(Ts + 1)

D None of these

Review Detailed Answer

Correct Answer: e-TS

Suppose that the gain, time constant and dead time of a process with the following transfer function: Gc(s) = 10 exp( – 0.1s)/(0.5s + 1) are known with a possible error of ± 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as________________?

A 8, 0.6, 0.08

B 12, 0.6, 0.12

C 8, 0.6, 0.12

D 12, 0.4, 0.08

Review Detailed Answer

Correct Answer: 12, 0.6, 0.12

Paramagnetism method is not used for the composition determination of ______________ in gases?

A Oxygen

B Oxides of nitrogen

C Carbon dioxide

D Any of these

Review Detailed Answer

Correct Answer: Carbon dioxide

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

The unit step response of the transfer function 1/(s2 + 2s + 3) _______________________?

The operation of a Rotameter is based on ________________?

Which of the following fluid flow measuring devices can measure the largest flow rate ?

Which of the systems having the following transfer function is stable ?

What is the dynamic error in a critically damped second order instrument for a ramp input (At) ?

Emf developed by a thermocouple while measuring a temperature of 400°C is 22 mV. The type of thermocouple used is ___________________?

An amplitude ratio of 0.1 corresponds to _____________ decibels?

Transfer function of transportation lag is___________________?

Paramagnetism method is not used for the composition determination of ______________ in gases?