Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. In a venturimeter
a. Length of divergent cone is equal to the length of conergent cone
b. Length of divergent cone is half that of convergent cone
c. Divergent cone is kept shorter than convergent cone
d. Divergent cone is kept longer than the convergent cone
e. None of the above
Q. The flow in venturi flume takes place at
a. Atmospheric pressure
b. Vacuum
c. High pressure
d. Varying pressure
e. None of the above
Q. Chemically inact relatively unstable blocks, large or small with three or more sets of joints and seams are known as
a. Moderately jointed rocks
b. Crushed rocks
c. Schistos rocks
d. Chemical rocks
e. Block or seamy rocks
Q. A Founeyron turbine is
a. Outward flow reaction turbine
b. Inward flow reaction turbine
c. Outward flow impulse turbine
d. Inward flow impulse turbine
e. None of the above
Q. Kinematic similarity between model and prototype means
a. Vitrified clay.
b. The similarity of shape
c. The similarity of discharge
d. The similarity of forces
e. The similarity of motion
Q. In order to keep out debris and other materials carried by water which are likely to damage turbine, provision is made by
a. Ensign valve
b. Jet flow gates
c. Trash racks
d. Radial gates
e. Trunions
Q. The thickness of laminar boundary layer at a distance x from the leading edge over a flat plate varies as
a. x1/2
b. x3/5
c. x2
d. x
e. x4/5
Q. Anchor blocks are provided to hold the pipe line so as to
a. Prevent the pipe line sliding down the hill
b. Control the direction of expansion
c. Resist the unbalanced hydrostatic forces at a change of direction of the pipe line
d. Prevent movement of the pipe line on account of vibration or water hammer pressures
e. All of the above
Q. The magnitude of water hammer depends on
a. The length of pipeline
b. The speed at which the valve is closed
c. To elastic properties of the liquid flowing through the pipe
d. The elastic properties of the pipe material
e. All of the above
Q. When the relationship between Reynolds number and the friction factor is represented by a straight line the flow is said to be
a. laminar flow
b. vortex flow
c. turbulent flow
d. isentropic flow
Q. Buoyant force is
a. The resultant force on a body due to the fluid surrounding it
b. A non-vertical force on symmetrical bodies
c. Equal to the volume of liquid displaced
d. The resultant force acting on a floating body
e. The force necessary to maintain equilibrium of a submerged body
Q. The hydraulic radius is given by
a. Wetted perimeter divided by area
b. Square root of area
c. Area divided by wetted perimeter
d. Area divided by square of wetted perimeter
e. None of these answers
Q. Mouthpieces are used to measure
a. pressure
b. rate of flow
c. frictionless
d. viscosity
e. velocity
Q. In Red wood viscometer
a. Absolute value of viscosity is determined
b. The fluid discharges through orifice with negligible velocity
c. Comparison of viscosity is done
d. Part of the head of fluid is utilised in overcoming friction
e. The fluid should rapidly flow out of the orifice
Q. Steady flow occurs when
a. There are no obstructions on the path of flow
b. Conditions do not change withtime at any point
c. The velocity does not change
d. The pressure does not change along the flow
e. Conditions change gradually with time