Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. One poise is equivalent to
a. 360 kg/m-hr
b. 1 dyne sec/cm2
c. 1/98.1 kgf sec/m2
d. 10-1 kg/m-sec
e. Any of the above
Q. The magnitude of earthquake pressure on a dam varies as a function of
a. Frequency of vibration and amplitude
b. Richard's scale number
c. Amplitude
d. Frequency of vibration
e. Amplitude and intensity
Q. Mercury is generally used in barometer because
a. It does not stick to the tube walls
b. It has practically zero vapour pressure
c. All above
d. It shines and can be easily read
e. Of higher density due to which the height of barmeter will be small
Q. Model analysis of free surface flows are based on
a. Reynold's no
b. Greater than ten
c. Mach no.
d. Froude no.
e. Euler no.
Q. World's largest capacity hydro-electric generating plant is located in
a. U.S.S.R.
b. U.S.A.
c. France
d. India
e. Germany
Q. A Pelton wheel is
a. Inward flow reaction turbine
b. Outward flow impulse turbine
c. Axial flow impulse turbine
d. Aoutward flow reaction turbine
e. Inward flow impulse turbine
Q. The centre of buoyancy is
a. Centroid of displaced volume of fluid
b. Mid-point between C.G. and metacentre
c. The point of intersection of the buoyant force and the centre line of the body
d. Centre of gravity of the body
e. When the metacentre is below C.G.
Q. If a centrifugal pump is noisy in operation, the cause may be
a. Air in water
b. Discharge head too high
c. Mechanical defect
d. Suction head too high
e. Priming faulty
Q. An object having 20 kg mass weighs 19.60 kg on a spring type balance. The value of 'g' in m/sec2 for the place is
a. 1000
b. 10.1
c. 9.8
d. 10.2
e. 9.9
Q. The loss of head due to sudden enlargement is attributed to
a. roughness of the pipe
c. production and dissipation of turbulent energy
d. viscosity of fluid
e. generation of heat
Q. Specific speed for reaction turbine ranges from
a. 10 - 110
b. 3 - 710
c. 200 - 300
d. More than 300
e. 125 - 180
Q. In a turbine installation gross head is defined as
a. The difference of level between the head race and the tail race
b. The difference of level between reservoir and downstream
c. The difference of head between axis of turbine to discharge stream level
d. The head actually used in developing power
e. None of the above
Q. A liquid compressed in a cylinder has a volume of 1 litre at 1 MN/m2 and a volume of 995 cu-cm at 2 MN / m2. The bulk modulus of elasticity would be
a. 10 Mpa
b. 200 Mpa
c. Mpa
d. 5 Mpa
e. 20 Mpa
Q. Identify the correct statement
a. Frictional resistance in a pipe depends on the square of area of the wetted surface
b. Frictional resistance in a pipe decreases with density of the fluid
c. Frictional resistance in a pipe is dependent on the fluid pressure
d. Frictional resistance in a pipe increases with the square of velocity
e. Frictional resistance in a pipe is independent on surface roughness
Q. In case the resultant of all the forces acting on a dam passes outside the base, the dam would overturn unless
a. Friction pads are provided
b. Coefficient of driction of the material is increased
c. It can resist tensile stress
d. Additional weight is provided on the body of the dam
e. Anchor blocks are provided