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.Management Sciences
Category: Fluid Mechanics for Chemical
While starting an axial flow pump, its delivery valve should be kept _______________?
A. Open
B. Closed
C. Either open or closed
D. None of these
In Newton’s law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the ______________ of its diameter?
A. Inverse
B. Square root
C. Second power
D. First power
In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of___________________?
A. Relative roughness
B. Absolute roughness
C. Friction co-efficient for flows at equal Reynold number
D. All A., B. & C.
The curve of metacentre for a floating body ____________ the curve of buoyancy?
A. Is always below
B. Is the evolute of
C. Intersects at right angle
D. Is tangential to
If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor). ?
A. Q = Q1 + Q2 + Q3
B. V1 = V2 = V3
C. Q1 = Q2 = Q3
D. f = f1 + f2 + f3
For a reciprocating pump, the indicator diagram is the graph between the________________?
A. Discharge and overall efficiency
B. Volume swept by piston for one complete revolution and the pressure in the cylinder
C. Angle swept by the crank pin at any instant and the discharge
D. None of these
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