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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.

Continuous measurement of moisture content of paper in paper industry is done by measuring the_________________?

A Thermal conductivity through the paper

B Electrical resistance through the paper

C Magnetic susceptibility

D None of these

Review Detailed Answer

Correct Answer: Electrical resistance through the paper

Mcleod gauge measures the _____________ pressure?

A Positive

B Sub-atmospheric

C Very high

D Atmospheric

Review Detailed Answer

Correct Answer: Sub-atmospheric

According to Bode stability criterion, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is_________________?

A 0°

B 45°

C 90°

D 180°

Review Detailed Answer

Correct Answer: 0°

Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury?

A 250

B 350

C 550

D 700

Review Detailed Answer

Correct Answer: 550

Pyrometry refers to the measurement of temperature_________________?

A With the mercurial thermometer upto 350°C

B Directly

C Which is of higher magnitude

D All A., B. & C.

Review Detailed Answer

Correct Answer: Which is of higher magnitude

Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 – 1600°C ?

A Optical pyrometer

B Radiation pyrometer

C Photoelectric pyrometer

D Thermocouples

Review Detailed Answer

Correct Answer: Thermocouples

Water is flowing through a series of four tanks and getting heated as shown in figure. It is desired to design a cascade control scheme for controlling the temperature of water leaving the tank 4 as there is a disturbance in the temperature of a second stream entering the tank 2. Select the best place to take the secondary measurement for the second loop?

A Tank 1

B Tank 2

C Tank 3

D Tank 4

Review Detailed Answer

Correct Answer: Tank 3

A first order system with unity gain and time constant η is subjected to a sinusoidal input of frequency w = 1/η. The amplitude ratio for this system is______________?

A 1

B 0.5

C 1/√2

D 0.25

Review Detailed Answer

Correct Answer: 1

Silver point temperature is ______________ °C?

A 760.5

B 860.5

C 960.5

D 1060.5

Review Detailed Answer

Correct Answer: 960.5

What is the Laplace transform of sin t ?

A 1/(s2 + 1)

B s/(1 + s2)

C 1/(s2 – 1)

D s/(s2 – 1)

Review Detailed Answer

Correct Answer: 1/(s2 + 1)

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Continuous measurement of moisture content of paper in paper industry is done by measuring the_________________?

Mcleod gauge measures the _____________ pressure?

According to Bode stability criterion, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is_________________?

Pyrometry refers to the measurement of temperature_________________?

Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 – 1600°C ?

A first order system with unity gain and time constant η is subjected to a sinusoidal input of frequency w = 1/η. The amplitude ratio for this system is______________?

Silver point temperature is ______________ °C?

What is the Laplace transform of sin t ?