Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. A plot between power generated in MW and time is known as
a. Load curve
b. Load duration curve
c. Load factor
d. Demand curve
e. None of the above
Q. Mercury is suitable for manometers because
a. It moves easily
b. It does not stick to tube walls
c. It has high density
d. It can be easily seen in tube
e. It is generally not used in manometers
Q. The river flow during floods can be classified as
a. Unsteady uniform flow
c. unsteady non-uniform flow
d. Steady uniform flow
e. steady non-uniform flow
Q. A hydraulic intensifier is a device
a. To lift small quantities of water through large head by means of large quantity of water falling through small height
b. To generate high pressure
c. To increase the intensity of pressure of water by means of the energy of a large quantity of water at low pressure
d. To temporarily store the energy of water
e. None of the above
Q. The angle of contact (0) between mercury and glass tube in case of capillary depression is
a. 128?
b. 157?
c. 10?
d. 90?
e. 0?
Q. For a floating ship to be in equilibrium the metacentre should be
b. below the centre of gravity
c. above the centre of gravity
d. exactly at the centre of gravity
e. close to centre of gravity
Q. Permissible velocity of water flowing through concrete tunnel is usually
a. 4 - 5 m/s
b. 12 - 12 m/s
c. 25 m/s
d. 20 m/s
e. 10 - 12 m/s
Q. A rocket exits exhaust gases with p = 0.5 kg m3 out a 50 cm dia nozzle at a velocity of 1200 m/s. Estimate the thrust, in kN
a. 140
b. 420
c. 40
d. 280
e. 90
Q. An impulse turbine
a. Always operates submerged
b. Is most suited for low head installations
c. Operates by initial complete conversion to kinctic energy
d. Converts pressure head into velocity head throughout the vanes
e. Makes use of a draft tube
Q. Separation is caused by
a. Reduction of pressure gradient to zero
b. The boundary layer thickness reducing to zero
c. An adverse pressure gradient
d. Reduction of pressure to vapour pressure
e. None of these answers
Q. The width of a weir with end contractions is
a. Equal to the width of the channel
b. Less than the width of the channel
c. Half the width of the channel
d. One fourth the width of the channel
e. None of the above
Q. The condition for the stable equilibrium of a floating body is
a. The metercentre should lie above he e.g
b. The centre of buoyancy and the c.g must lie on the same vertical line
c. All of the above
d. None of the above
e. None
Q. Specific speed (metric) = k x specific (FPS) where k has the value of
a. 0.67
b. 0.41
c. 2.37
d. 1.75
e. 1
Q. 105 N/m2 pressure is eqrivalent to
a. 1 bar
b. 750.06 mm Hg
c. 0.98682 atm
d. 401.85 m H2O
e. Any of the above