Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. The pressure gradient (?p/?x) in a developed turbulent flow in a horizontal pipe
a. varies directly with the average velocity
b. is constant
c. decreases exponentially
d. is zero
e. varies linearly with axial distance
Q. The portion of the power canal that extends from the intake works to the power house, is known as
a. Tail race
b. Main storage
c. Lead race
d. Diversion canal
e. Head race
Q. In the theory of lubrication the assumption is made that
a. The pressure variation along the bearing is the same as if the plates were parallel
b. The velocity varies linearly between the two surfaces
c. The velocity distribution is the same at all cross-sections
d. The velocity varies linearly between the two surfaces
e. The velocity distribution at any section is the same as if the plates were parallel
Q. The force, in kN acting on one of the 1.5 m sides of an open cubical water tank (which is full) is
a. 12.1
b. 10.2
c. 18.2
d. 15.3
e. 16.5
Q. A body with a rounded nose and along tapering tail is usually best suited for
a. supersonic flow
b. turbulent subsonic flow
c. sonic flow
d. Laminar flow
Q. Darcy's equation for flow through porous media valid as long as the flow remains
a. steady
b. turbulent with negligible inertial effects.
c. critical
d. laminar with negligible internal effects
Q. Which rock is expected to have highest strength grade?
a. Sand stone rock
b. Limestone rock
c. Solid quartzite rock
d. Marble rocks
e. Granite rock
Q. The ratio between inertial forces and the square root of pressure forces is known as
a. Euler number
b. Weber number
c. Mach number
d. Froude number
Q. A short tube mouthpiece will not run full at its outlet if the head under which the orifice work is
a. Less than 5 m of water
b. Between 5 and 10 m of water
c. Less than 3 m of water
d. More than 12.5 m of water
e. Less than 10 m of water
Q. One dimensional flow is
a. Restricted to flow in a straight line
b. Flow which neglects changes in a transverse direction
c. Steady uniform flow
d. Uniform flow
e. None of the above
Q. In above problem, what will be the horse power required to drive the pump?
a. 1000
b. 1670
c. 1570
d. 1450
e. 1900
Q. The effect of negative pressure beneath the nappe in case of flow of water over a rectangular suppressed weir is to
a. Decrease the discharge
b. Increase the discharge
c. Increase frictional resistance
d. Reduced frictional resistance
e. None of the above
Q. The units of dynamic viscosity are
a. kg m2/sec
b. kg-sec/m
c. Newton/m2-sec
d. m2/sec
e. Newton-sec/m2
Q. Formation of air pockets in pressure tunnel may be avoided by
a. Avoiding partial gate opening
b. Avoiding traps or pockets along the crown
c. Avoiding vortices formation
d. Avoiding small intakes
e. Any of the above
Q. The size of a venturimeter is specified by
a. pipe diameter
b. Discharge channel
c. fluid pressure
d. pipe diameter and throat diameter