Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. Fluid statics deals with
a. Viscous and pressure forces
b. Viscous and gravity forces
c. Gravity and pressure forces
d. Surface tension and gravity forces
e. None of the above
Q. The purpose of surge tank in a pipe line is to
a. To maintain the flow of water under emergency conditions
b. To relieve the pressure due to water hammer
c. Smoothen the flow of water
d. Prevent occurrence of hydraulic jump
e. Minimise friction losses in pipe
Q. Specific speed of a impulse turbine ranges from
a. 100 - 140
b. 200 - 300
c. 300 - 800
d. 100 - 200
e. 0 - 4.5
Q. The bulk modulus of elasticity
a. Is independent of temperature
b. Increases with the pressure
c. Is independent of pressure and viscosity
d. Is larger when the fluid is more compressible
e. None of the above
Q. An imaginary curve drawn through a flowing fluid in such a way that the tangent to it at any point gives the direction of the velocity of flow at that point, is known as
a. Flow-contour
b. Line of flow
c. Streak line
d. Path line
e. Flow line
Q. Under which of the following conditions, Bernoulli's equation cannot be applied?
a. When the flow is rotational
b. When the flow is turbulent
c. When the flow is unsteady
d. All of the above
Q. The hydraulic gradient line
a. Is same as central line of section
b. Is always parallel to the bottom
c. Is always below the total energy line
d. Is always below the total energy line
e. Is always above the total energy line
Q. The flow in a pipe is laminar if the Reynolds number is
a. Between 2000 and 4000
b. Equal to 10000
c. Between 4000 and 6000
d. Equal to 6300
e. Less than 2000
Q. 1 m of water column is equivalent to
a. 10 kN/m2
b. 1000 kN/m2
c. 0.1 kN/m2
d. 100 kN/m2
e. 1.0 kN/m2
Q. The unit of specific speed is
a. R.P.M.
b. Metres/sec
c. Dimensionless
d. Any of the above
e. None of the above
Q. The head loss in a pipe flow can be calculated using
a. the Momentum equation
b. The darcy Weisbach equation
c. the Bernoulli equation
d. Darcy's law
e. the Chezy Manning equation
Q. In parallel pipe problems
a. The pressure gradient remains the same through all the pipes
b. The hydraulic gradient remains the same through all the pipes
c. The head loss is the same through each pipe
d. The head losses through each pipe are added to obtain the total head loss
e. None of the above
Q. Identify the case in which the friction drag is generally larger than pressure drag?
a. Flow past a thin sheet
c. Flow past a cylinder
d. Flow past an aerofoil
e. Flow past a sphere
Q. High velocity flow in a conduit of large size is known as
a. Laminar flow
b. Turbulent flow
c. Either of the above
d. None of the above.
Q. 12. If the Reynolds number is less than 2000, the flow in a pipe is
a. Laminar flow
b. Turbulent flow
c. Transition flow
d. None of the above.