chemical engineering MCQs – Page 338

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
6741. The ____________ is measured by a piezometric opening?
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A. Static pressure

B. Total pressure

C. Dynamic pressure

D. Point velocity

6742. Bernoulli?s equation does not apply to the functioning of a/an__________________?
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A. None of these

B. pitot tube

C. Venturimeter

D. Orificemeter

6743. Power loss in an orificemeter is _____________ that in a Venturimeter?
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A. Less than

B. Data insufficient, cannot be predicted

C. More than

D. Same as

6744. Experimental study of laminar fluid flow through a circular tube was conducted by____________________?
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A. Reynolds

B. Blake-Plummer

C. Pascal

D. Hagen and Poiseuille
6745. Volute type of casing is provided in a centrifugal pump to___________________?
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A. Convert velocity head to pressure head

B. Reduce the discharge fluctuation

C. Increase the discharge

D. Convert pressure head to velocity head

6746. Laminar flow of a Newtonian fluid ceases to exist, when the Reynolds number exceeds___________________?
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A. 2100

B. 4000

C. 3000

D. 1500

6747. Dean number is concerned with the____________________?
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A. Fluid-particle interaction

B. Psychrometry

C. Power consumption in agitated vessels

D. Fluid flow through helical pipes
6748. Priming of a centrifugal pump is done to___________________?
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A. Increase the mass flow rate of fluid

B. Avoid chances of separation inside the impeller

C. None of these

D. Develop effective pressure rise by the pump

6749. When larger particles e.g., grains are subjected to fluidisation, the corresponding bed produced is termed as the _______________ bed?
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A. Spouted

B. Sluggish

C. Boiling

D. Teeter

6750. A streamline is_________________?
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A. The line connecting the mid-points of flow cross-sections

B. Always the path of a particle

C. Defined for uniform flow only

D. Drawn normal to the velocity vector at every point
6751. Which of the following can be used for the direct measurement of volumetric flow rate of slurry ?
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A. Rotameter

B. Venturimeter

C. Pitot tube

D. Orificemeter

6752. Turbulent flow generally occurs for cases involving__________________?
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A. Very slow motion

B. Very narrow passages

C. None of these

D. Highly viscous fluid

6753. The simple Pitot tube measures the _______________ pressure?
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A. static

B. None of these

C. Dynamic

D. Total
6754. Pascals law is valid, only when the fluid is_____________________?
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A. At rest

B. Frictionless and at rest

C. At rest and when the frictionless fluid is in motion

D. None of these

6755. Choking in case of pipe flow means that a___________________?
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A. None of these

B. Valve is closed in the line

C. Specified mass flow rate cannot be achieved

D. Restriction in flow cross-section area occurs

6756. With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost________________?
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A. Increases

B. Decreases

C. Increases exponentially

D. Remains unchanged

6757. Absolute viscosity of a fluid is a function of the __________ of the fluid?
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A. Motion

B. Pressure & temperature

C. Shearing stress

D. Both B. & C.
6758. Pick out the wrong statement pertaining to fluid flow ?
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A. Navier-Stokes equation is applicable to the analysis of viscous flows

B. circular pipes is 0.5</strong>

C. The ratio of average velocity to the maximum velocity for turbulent flow of Newtonian fluid

D. Hagen-Poiseuille equation is applicable to the laminar flow of Newtonian fluids

E. The Newtonian fluid velocity in a circular pipe flow is maximum at the centre of the pipe

6759. Fluid flow in a/an ______________ is an example of pressure flow?
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A. Pipe

B. Open channel

C. Partially filled pipeline

D. River

6760. Which of the following factors does not contribute to the pressure drop in a pipeline ?
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A. Size of pipe

B. Length of pipe and number of bends

C. None of these

D. Velocity of fluid