Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. If a weir is constructed for full width of channel, it is known as
a. sharp crested weir
c. suppressed weir
d. submerged weir
e. sultro weir
Q. Rocks which contain neither joints nor hair cracks, are known as
a. Popping rocks
b. Squeezing rocks
c. Hard rocks
d. Schistos rocks
e. Stratified rocks
Q. In a centrifugal pump installation while starting, the position of delivery valve is
a. Half open
b. Fully closed
c. Less than half open
d. More than half open
e. Fully open
Q. The locus of elevations that water will rise in a series of pitot tubes is called
a. the pressure head
b. the hydraulic grade line
c. the velocity head
d. the energy grade line
e. 2.45
Q. For pumping highly viscous fluid viscous, the type of pump enerally used is
a. Centrifugal
b. Gear vane type
c. Sliding vane type
d. Screw pump
e. Multistage centrifugal
Q. Priming is required in
a. centrifugal pumps
b. gear pumps
c. reciprocating pumps
d. all of the above
Q. Pressure drag results from
a. Skin friction
b. Deformation drag
c. Development of a stagnation point
d. Occurrence of a wake
e. None of the above
Q. Stanton diagram is a plot of
a. friction factor against log of Reynold number
b. 1.25
c. log of friction factor against Reynold number
d. log of driction factor against log of Reynold number
e. friction factor against Reynold number
Q. Select the quantity in the following that is not a dimensionless parameter
a. Kinematic viscosity
b. Darcy weisbach friction factor
c. Weber number
d. Froude number
e. Pressure coefficient
Q. Four cars, with a mass of 1500 kg each, are loaded on a 6 m wide, 12 m long small car ferry. How far, in cm, will it sink in the water?
a. 8.3
b. 11.5
c. 10.2
d. 15.2
e. 9.6
Q. By the usual gravity analysis as per B.I.S., the permissible tensile stresses at the upstream face of the dam under earthquake loading, should not exceed
a. Zero
b. 100 kg/ cm2
c. 50 kg/ cm2
d. 150 kg/ cm2
e. 200 kg/ cm2
Q. In laminar flow
a. The viscosity is unimportant
b. The fluid particles move in irregular and haphazard paths
c. Is fixed in space in steady flow
d. Experimentation is required for the sirmplest flow cases
e. Newton's law of viscosity applies
Q. Uniform flow occurs when
a. Conditions do not change with time at any point
b. Rate of change of velocity of fluid is zero
c. At every point the velocity vector is identical in magnitude and direction for any given instant
d. The change in transverse direction are zero
e. None of the above