Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. With regard to hydraulic ram, which of the following statements is incorrect?
a. It works automatically
b. It requires very little maintenance
c. Its running cost is high
d. It has no moving parts
Q. The resultant hydrostatic force acts through a point known as
a. Centre of gravity
b. Centre of buoyancy
c. Centre of Pressure
d. None of the above
e. Is practically incompressible
Q. In a sudden expansion in a pipe
a. frictional resistance is negligible
c. piezometric head gradually rises in the downstream direction
d. total energy line rises in the down-stream direction
e. velocity head gradually increases
Q. For a supersonic flow, velocity
a. increases with decrease in area of flow
b. increases with increase in area of flow
c. does not change with variation in area of flow
d. None of the above
e. 0.25 times the diameter
Q. Newton's law of viscosity states that shear stress is directly proportional to
a. Velocity gradient
b. viscosity
c. Shear strain
d. Greater than ten
e. Velocity
Q. The advantages of burried penstocks is
a. Less accessible in inspection
b. Tendency to slide along steep slopes
c. Need for special coating against the corrosive action of salts present in soil
d. Location difficult
e. No expansion joints needed
Q. Which of the following principle is used in the operation of Mc Leod gauge?
a. Charles law
b. Boyles law
c. Daltons law
d. Pascals law
e. None of the above
Q. A type of flow in which the fluid particles while moving in the direction of flow rotate about their mass centre, is known as
a. Uniform flow
b. Rotational flow
c. Steady flow
d. Turbulent flow
e. Laminar flow
Q. A pilot tube is used for the measurement of
a. Viscosity
b. Velocity
c. Flow rate
d. Pressure
e. Surface tension
Q. The advantage of exposed penstock is
a. Full exposure to external variation in temperature
b. Longitudinal stresses may develop owing to anchorages
c. Changes of water conveyed being frozen in severe cold climates
d. Expansion joints necessary
e. Safety against sliding
Q. If the Froude number in open channel flow is equal to 1.0, the flow is known as
a. critical flow
b. Turbulent flow
c. streaming flow
d. Laminar flow
e. shooting flow
Q. The centre of pressure on an immersed surface is
a. Depends on the density of fluid
b. Depends on the viscosity of fluid
c. At the cantre of gravity
d. Below the centre of gravity
e. Above the centre of gravity
Q. The ratio of inertia force to pressure forces is related with a non-dimensional number known as
a. Nusselt number
b. Mach number
c. Weber number
d. Reyonolds number
e. Euler number
Q. Micaceous rocks with closely spaced cleavage planes along which easy separation can be affected, are known as
a. Stratified rocks
b. Schistos rocks
c. Sedimentary rocks
d. Popping rocks
e. Intact rocks