Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. The total-energy-line in pipe flow is a graphical representation of the Bernoulli’s equation and representsthe sum of velocity head, pressure head and the elevation head above:
a. The top of the pipeline
b. The arbitrary horizontal datum
c. The centre line of pipe
d. The bottom of the pipe.
Q. A venturimeter is used for measuring:
a. Pressure
b. Flow rate
c. Total energy
d. Piezometric hea
Q. The co-efficient of discharge (Cd) of venturimeter lies within the limits:
a. 0.95 to 0.99
b. 0.8 to 0.85
c. 0.7 to 0.8
d. 0.6 to 0.7
Q. What flow rate in m3/s, is needed using a 20 : 1 scale model of a dam over which 4m3/s of water flows?
a. 0.0068
b. 0.0022
c. 0.01
d. 0.0015
e. 0.0057
Q. The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is
b. maximum at the mid-plane and varies linearly wth distance from mid-plane
c. constant over the cross-section
d. zero at the mid-point and varies linearly with distance from mid-plane
e. zero at the plates and varies exponentially to mid-point
Q. The flow of water in a pipe of diameter 3000 mm can be measured by
a. Rotameter
b. Pitot tube
c. Nozzle
d. Orifice plate
e. Venturimeter
Q. In a flowing fluid, a particle may possess
a. Pressure energy
b. Elevation or gravitation potential energy
c. Inertial energy
d. Kinetic energy
e. All the above
Q. The eddy viscosity for turbulent flow is
a. A property of the fluid
b. Dependent on fluid temperature
c. Part of dynamic viscosity
d. Dependent on flow
e. Independent of the nature of flow
Q. Which type of pump is different from others in the same group?
a. Gear pump
b. Screw pump
c. Lobe pump
d. Plunger pump
e. Cam and piston pump
Q. In case of channels, shooting flow does not occur
a. Directly after a hydraulic jump
b. In a steep channel
c. In a channel with low gradient
d. In a trapezoidal channel
e. In a horizontal channel
Q. A Pitot-tube is used for measuring:
a. Velocity of flow
b. Pressure of flow
c. Flow rate
d. Total energy.
Q. When a Pitot-tube is put to use it must be ensured that its alignment is such that:
a. The horizontal leg should be inclined at 45° in plan
b. Its horizontal leg is at right angles to the flow direction
c. Its opening faces upstream and the horizontal leg is perfectly aligned with the direction of flow
d. None of the above.
Q. The hydraulic gradient-line indicates the variation of which of the following:
a. Velocity head in flow direction
b. Piezometric head in the direction of flow
c. Total energy of flow in the direction of flow
d. None of the above.
Q. The change in moment of momentum of fluid due to flow along a curved path results in:
a. A change in pressure
b. Torque
c. A change in the total energy
d. None of the above.