861. Two piping system are said to be equivalent, when the ______________ are same?
A. Fluid flow rate & friction loss
B. Length & friction factor
C. Diameter & friction factor
D. Length & diameter

862. In which of the following cases, it is possible for flow to occur from low pressure to high pressure ?
A. Flow of liquid upward in a vertical pipe
B. Flow through a converging section
C. Flow of air downward in a pipe
D. Impossible in a constant cross-section conduit

863. An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonian fluid beyond yield stress. Which of the following is an ideal plastic ?
A. Sewage sludge
B. Rubber latex
C. Blood
D. Sugar solution

864. For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance) ?
A. V/Vmax = (x/r)1/7
B. V/Vmax = (r/x)1/7
C. V/Vmax = (x.r)1/7
D. None of these

865. A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, then the new head will be ______________ metres?
A. 2
B. 4
C. 8
D. 5.5

866. Enamels and paints are generally _______________ fluid?
A. Rheopectic
B. Pseudo-plastic
C. Thixotropic
D. Dilatant

867. The distance between metacentre and ______________ is called metacentric height?
A. Water surface
B. Centre of gravity
C. Centre of buoyancy
D. None of these

868. ______________ is an example of axial flow impeller?
A. Paddle
B. Turbine
C. Propeller
D. All A., B. and C.

869. A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of _______________ shape?
A. Circular
B. Rectangular
C. Triangular
D. Trapezoidal

870. Which of the following is dimensionless ?
A. Angular velocity
B. Fanning friction factor
C. Specific volume
D. None of these

NOTE
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