chemical engineering MCQs – Page 326

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 Review each marked answer and report any item that may be outdated or unclear.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

6501. The head loss in turbulent flow in a pipe varies________________?
0

A. As (velocity)2

B. Inversely as the square of diameter

C. Inversely as the velocity

D. As velocity

6502. Power number is the ratio of____________________?
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A. Inertial stress to drag stress

B. Drag stress to inertial stress

C. Inertial stress to gravitational stress

D. Gravitational stress to drag stress

6503. The uniformity of a gas fluidised bed depends upon the _______________ of the solid particles?
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A. Size

B. Surface properties

C. Both A. and B.

D. Neither A. nor B.

6504. Ratio of pressure and inertia force gives ______________ number?
0

A. Euler

B. Mach

C. Weber

D. Froude

6505. Sewage sludge is ______________ type of non-Newtonian fluid?
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A. Dilatant

B. Pseudo plastic

C. None of these

D. Bingham plastic

6506. A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a ____________ pump?
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A. Volute

B. Vacuum

C. Sump

D. Submerged

6507. Which of the following flow measuring devices is an area meter ?
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A. Venturimeter

B. Anemometer

C. Orificemeter

D. Rotameter

6508. The valve used for very remote and accurate control of fluid is a _____________ valve?
0

A. Gate

B. Globe

C. Butterfly

D. Needle

6509. Most commonly used joint in the underground pipe lines is the________________?
0

A. Coupling

B. Sleeve joint

C. Expansion joint

D. Flange

6510. A fluid is the one, which___________________?
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A. Permanently resists distortion

B. Cannot remain at rest under the action of shear force

C. Is incompressible

D. Continuously expands till it fills any container

6511. The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by_____________________?
0

A. Cd . ?(2gH)

B. Cv . ?(2gH)

C. Cc . ?(2gH)

D. Cv . Va

6512. The value of critical Reynolds number for pipe flow is_________________?
0

A. None of these

B. 100,000

C. 10,000

D. 1,300

6513. The valve commonly used in pipes larger than 2? dia is a______________?
0

A. Check valve

B. Plug-cock

C. Globe valve

D. Gate valve

6514. Theoretical head developed by a centrifugal pump does not depend upon the _____________ the impeller?
0

A. Speed of

B. Fluid velocity leaving

C. None of these

D. Radius of

6515. In the laminar boundary layer flow over a flat plate, the ratio (?/x) varies as: (where, ? is the boundary layer thickness and x is the distance from the leading edge in the direction of flow)?
0

A. ?Re

B. Re-1/2

C. Re

D. 1/Re

6516. Centre of pressure in an immersed body is ______________ the centre of gravity?
0

A. At

B. Above

C. Below

D. Either above or below; depends on the liquid density

6517. Cd, Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficient, Cc = co-efficient of contraction = (area of jet at vena-contracta/area of opening), Cv = co-efficient of velocity = (actual velocity at vena-contracta/theoretical velocity)?
0

A. Cd = Cc/Cv

B. None of these

C. Cd = Cc.Cv

D. Cd = Cv/ Cc

6518. Which of the following assumptions enables the Eulers equation of motion to be integrated ?
0

A. The continuity equation is satisfied

B. The fluid is incompressible

C. The fluid is non-viscous

D. The flow is rotational and incompressible

6519. Molten soap mass is transported by a ______________ pump?
0

A. Centrifugal

B. Gear

C. Diaphragm

D. Reciprocating

6520. The flow of a liquid through tapering pipe at a constant rate is an example of _______________ flow?
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A. Unsteady non uniform

B. Steady uniform

C. Steady non uniform

D. Unsteady uniform

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