Fluid Mechanics for Chemical MCQs

724 MCQs  — Chemical Engineering MCQs  (Page 45 of 73)

Attempt Fluid Mechanics for Chemical Quiz
The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke’s law range is proportional to the_____________________?
A. Inverse of fluid viscosity
B. Square of particle size
C. Difference in the densities of the particle & fluid
D. All a., b. and c.
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The resistance wire used in a hot wire anemometer for conducting electrical current is made of__________________?
A. Copper
B. Tungsten
C. Chromium
D. Aluminium
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As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1 ?
A. Increases linearly with v
B. Decreases linearly with v
C. Decreases as v2
D. None of these
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The centre of pressure is_________________?
A. Always below the centroid of the area
B. Always above the centroid of the area
C. A point on the line of action of the resultant force
D. At the centroid of the submerged area
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The rate of shear versus the shear stress curves are time dependent for _____________ fluid?
A. Thixotropic
B. Rheopectic
C. Both a. & b.
D. Neither a. nor b.
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The flow of a liquid through tapering pipe at a constant rate is an example of _______________ flow?
A. Steady uniform
B. Steady non uniform
C. Unsteady uniform
D. Unsteady non uniform
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Very small pressure difference (< 5 mm water column) can be most conveniently measured by a/an _____________ manometer?
A. U-tube water
B. U-tube mercury
C. Inclined tube mercury
D. Inclined tube water
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In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the _____________ efficiency?
A. Manometric
B. Mechanical
C. Volumetric
D. Overall
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A fluid whose apparent viscosity increases with shear rate is termed as the _____________ fluid?
A. Newtonian
B. Viscous
C. Dilatant
D. Non-viscous
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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)?
A. Cd = cc/cv
B. Cd = cc.cv
C. Cd = cv/ cc
D. None of these
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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