771. Mach number is important in a fluid flow problem, when the inertia and _____________ forces predominate?
A. Elastic
B. Viscous
C. Gravity
D. None of these

772. Boundary layer thickness in turbulent flow over a flat plate increases as(where, d = distance from the leading edge.) ?
A. √d
B. d2/3
C. d4/5
D. d1/3

773. Nominal size of the discharge pipe of a pump is usually _____________ the nominal size of the inlet pipe?
A. Smaller than
B. Larger than
C. Same as
D. Twice

774. The exit cone angle in case of a standard Venturimeter is _____________ the entrance cone angle?
A. Smaller than
B. Greater than
C. Equal to
D. Either A. or B.

775. Molten soap mass is transported by a ______________ pump?
A. Diaphragm
B. Reciprocating
C. Gear
D. Centrifugal

776. Dimension of surface tension is (where, F = force, L = length) ?
A. FL-1
B. F-1. L
C. F.L-2
D. F-2. L

777. Ratio of pressure and inertia force gives ______________ number?
A. Weber
B. Mach
C. Euler
D. Froude

778. Brownian movement is prominent in the particle size range of _____________ microns in case of settling of a particle in a fluid?
A. 2 to 3
B. 0.01 to 0.10
C. 200 to 300
D. 100 to 1000

779. Nominal size of a pipe is an indication of its ______________ diameter?
A. Inner
B. Outer
C. Approximate
D. None of these

780. The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a _____________ fluid?
A. Bingham
B. Newtonian
C. Perfect
D. None of these

NOTE
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