chemical engineering fluid mechanics for chemical chemical engineering MCQs – Page 27

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering fluid mechanics for chemical chemical engineering Mcqs

521. A fluid whose apparent viscosity increases with shear rate is termed as the _____________ fluid?
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A. Non-viscous

B. Dilatant

C. Newtonian

D. Viscous

522. A differential pressure cell is used for____________________________?
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A. Measuring small pressure difference in gases

B. Measuring small pressure difference in liquids

C. Remote recording of pressure difference

D. Measuring the difference of the impact & the static pressure

523. Cp/Cv is termed as__________________?
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A. Prandtl number

B. Mach number

C. Weber number

D. Adiabatic constant

524. For the manometer set up shown in the figure, the pressure difference PA PB is given by_________________?
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A. (?H ?L) gL + (?L ?air)gH

B. (?H ?L) gH + (?L ?air) . g(L H)

C. (?H ?air)gH

D. (?H ?L)gH

525. For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by_______________?
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A. ?(?u)/?x = 0

B. (?u/?x) = (??/?t)

C. ?u/?x = 0

D. ??/?t = 0

526. The pressure head of a flow meter remains constant for_________________?
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A. Rotameter

B. Orificemeter

C. Venturimeter

D. Pitot tube

527. The maximum delivery pressure of compressors can be upto _____________ atmospheres?
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A. 10

B. 1000

C. 100

D. 250

528. For the free settling of a spherical particle through a fluid, the slope of, CD-log NRe, plot is____________________?
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A. -1

B. -0.5

C. 1

D. 0.5

529. The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stokes law range is proportional to the_____________________?
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A. Difference in the densities of the particle & fluid

B. Square of particle size

C. All A., B. and C.

D. Inverse of fluid viscosity

530. Turbulent flow generally occurs for cases involving__________________?
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A. None of these

B. Very narrow passages

C. Highly viscous fluid

D. Very slow motion

531. Drag force acting on a body does not depend upon the____________________?
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A. Density of the body

B. Density of the fluid

C. Velocity of the body

D. Projected area of the body

532. For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is _______________?
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A. More or less, depending on the type of particle

B. Equal

C. More

D. Less

533. A spherical particle is falling slow in a viscous liquid such that Reynolds number is less than 1. Which statement is correct for this situation ?
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A. None of the above

B. Drag force and gravitational forces are important

C. Inertial and drag forces are important

D. Drag, gravitational and buoyancy forces are important

534. Steady flow occurs, when the__________________?
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A. Conditions do not change with time at any point

B. Rate of the velocity change is constant

C. Conditions are the same at the adjacent points at any instant

D. Conditions change steadily with time

535. The centre of pressure is_________________?
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A. At the centroid of the submerged area

B. A point on the line of action of the resultant force

C. Always below the centroid of the area

D. Always above the centroid of the area

536. Hydraulic intensifier is used for increasing the ___________________?
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A. Rate of flow through delivery pipeline of a pump

B. Intensity of pressure of the liquid

C. Momentum rate through delivery pipe

D. Rate of velocity of liquid supply

537. Fluid flow at increasing rate through a diverging pipe is an example of ______________ flow?
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A. Non-steady non-uniform

B. Non-steady uniform

C. Steady non-uniform

D. Steady uniform

538. Which of the following may be termed as a variable orifice flow-meter ?
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A. All A., B. and C.

B. Pitot tube

C. Rotameter

D. V-notch

539. The phenomenon occuring during pumping of a liquid solution containing dissolved gases, which may come out of the solution giving rise to gas pockets, is termed as_______________?
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A. Sublimation

B. Stripping

C. Cavitation

D. Evaporation

540. Interstage coolers are provided in a multistage compressor to____________________?
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A. Achieve the exact delivery pressure

B. Save power in compressing a given volume to a given pressure

C. Cool the delivered air

D. None of these

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