671. 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
672. Power requirement of fans having constant wheel diameter varies _____________ fan speed?
A. As square of
B. Directly as
C. As cube of
D. None of these
673. Which is not a variable head meter _________________?
A. Venturimeter
B. Pitot tube
C. Rotameter
D. None of these
674. Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of ______________ pressure?
A. Small differential
B. Atmospheric
C. Absolute
D. Gage
675. Location of vena-contracta in an orificemeter does not depend upon the________________?
A. Type of orifice
B. Density, viscosity & compressibility of the fluid
C. Ratio of pipe diameter to orifice diameter
D. Pipe roughness
676. Path followed by water jet issuing from the bottom of a water tank will be a__________________?
A. Parabola (vertex being at the opening)
B. Hyperbola
C. Horizontal straight line
D. Zig-zag path (which is geometrically undefined)
677. For flow past a flat plate, if „x‟ is the distance along the plate in the direction of flow, the boundary layer thickness is proportional to________________?
A. √x
B. 1/√x
C. x
D. 1/x
678. The unit of bulk modulus of elasticity for a liquid in S.I. unit is____________________?
A. N
B. N/m
C. N/m2
D. N/m3
679. It is possible to integrate an automatic flow controller to a________________?
A. Flow nozzle
B. Venturimeter
C. Rotameter
D. None of these
680. Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will_______________?
A. Increase
B. Decrease
C. Remain unchanged
D. Increase or decrease depending on the pipe material
NOTE
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