851. The peripheral velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec?
A. 1.8
B. 12.4
C. 186.2
D. 736.4

852. Drag is the force component exerted on an immersed object, ?
A. Passing the centroid of the body at 60°to the direction of motion
B. The component being parallel to the flow direction
C. The component being normal to the flow direction
D. None of these

853. Paper pulp is an example of _____________ fluid?
A. Dilatant
B. Bingham plastic
C. Newtonian
D. Pseudo-plastic

854. To handle smaller quantity of fluid at higher discharge pressure, use a ______________ pump?
A. Reciprocating
B. Centrifugal
C. Volute
D. Rotary vacuum

855. Check valve is used for ________________ flow?
A. Very precise control of
B. Unidirectional
C. Multidirectional
D. None of these

856. Bernoulli’s equation for steady, frictionless, continuous flow states that the ______________ at all sections is same?
A. Total pressure
B. Total energy
C. Velocity head
D. None of these

857. The pressure and power requirement of a gas fan at constant speed & capacity varies ____________ the gas density?
A. Directly as
B. Inversely as square root of
C. Inversely as
D. As square of

858. ____________ flow means the flow of incompressible fluid with no shear ?
A. Potential
B. Streamline
C. Creep
D. Boundary layer

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

860. Ratio of inertial forces to surface tension forces is called the _____________ number?
A. Euler
B. Froude
C. Mach
D. Weber

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