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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.

Pressure drop in a fluidised bed reactor is ______________ that in a similar packed bed reactor?

A Less than

B Greater than

C Same as

D None of these

Review Detailed Answer

Correct Answer: Greater than

When the water is warm, the height to which it can be lifted by a pump_________________?

A Decreases due to reduced viscosity

B Decreases due to reduced vapour pressure

C Increases due to increased vapour pressure

D Decreases due to increased frictional resistance

Review Detailed Answer

Correct Answer: Decreases due to reduced vapour pressure

In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes_______________?

A Less than atmospheric pressure

B More than liquid vapor pressure

C Less than liquid vapor pressure

D More than atmospheric pressure

Review Detailed Answer

Correct Answer: Less than liquid vapor pressure

Which of the following is the most common pump for pumping either raw sewage or sludge ?

A Electromagnetic pump

B Centrifugal pump

C Reciprocating pump

D Gear pump

Review Detailed Answer

Correct Answer: Reciprocating pump

In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ?

A Discharge of water by a centrifugal pump being run at a constant rpm

B Water flow in the suction and discharge pipe of a reciprocating pump

C Water discharge from a vertical vessel in which constant level is maintained

D Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

Review Detailed Answer

Correct Answer: Water flow in the suction and discharge pipe of a reciprocating pump

The boundary layer is that part of a moving fluid, in which the fluid velocity is_________________?

A Affected by the fluid flow pressure

B Constant

C Affected by the presence of a solid boundary

D All A., B. and C.

Review Detailed Answer

Correct Answer: Affected by the presence of a solid boundary

For turbulent flow of an incompressible fluid through a pipe, the flow rate „Q‟ is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent ‘n’ is_________________?

A 1

B 0

C < 1

D > 1

Review Detailed Answer

Correct Answer: 1

What is the value of Fanning friction factor f ‘ for smooth pipe at NRe = 106 approximately ?

A 0.003

B 0.01

C 0.1

D 0.3

Review Detailed Answer

Correct Answer: 0.003

In the complete turbulence zone (in rough pipes), the____________________?

A Rough and smooth pipes have the same friction factor

B Laminar film covers the roughness projections

C Friction factor depends upon NRe only

D Friction factor is independent of the relative roughness

Review Detailed Answer

Correct Answer: Friction factor is independent of the relative roughness

Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around________________?

A 2000

B 10

C 100

D 1000

Review Detailed Answer

Correct Answer: 10

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Pressure drop in a fluidised bed reactor is ______________ that in a similar packed bed reactor?

When the water is warm, the height to which it can be lifted by a pump_________________?

In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes_______________?

Which of the following is the most common pump for pumping either raw sewage or sludge ?

In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ?

The boundary layer is that part of a moving fluid, in which the fluid velocity is_________________?

For turbulent flow of an incompressible fluid through a pipe, the flow rate „Q‟ is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent ‘n’ is_________________?

What is the value of Fanning friction factor f ‘ for smooth pipe at NRe = 106 approximately ?

In the complete turbulence zone (in rough pipes), the____________________?

Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around________________?