Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. The breaking up of a liquid into fine droplets by spraying is called
a. Venturi effect
b. Vaporization
c. Carburetion
d. Osmosis
e. Atomization
Q. A rotameter should always be installed in
b. vertical position
c. inclined at 45? to vertical
d. inclined at 30? to vertical
e. horizontal position
Q. In case the adhesion between moleules of a fluid is greater than cohesion between fluid and the glass, then the free level of the fluid in glass tube dipped in the glass vessel will be
a. Lower than the surface of the fluid
b. Same as the surface of the fluid
c. Dependent on atmospheric temperature
d. Dependent on atmospheric pressure
e. Higher than the surface of the fluid
Q. A fluid is a substance that
a. expands until it fills its space
b. is essentially incompressible
c. has a viscosity that always decreases with temperature
d. always moves when subjected to a shearing stress
e. has a viscosity that always increases with temperature
Q. Which one of the following is not usually considered particular advantage of a Buttress dam?
a. Due to thin section, the problem of temperature control is minimised.
b. Economy in use of concrete
c. Less uplift force
d. The power house and switchyard etc. can be located between the buttresses
e. Because of thin members, the volume changes are significant
Q. When the rheogram is linear but does not pass through origin, fluid is said to be
a. Newtonian
c. Non-newtonian
d. Bingham.
e. Ideal plastic
Q. Water turbines may be put in the decreasing order of specific speed as
a. Propeller turbine, Reaction turbine Impulse turbine
b. Pelton wheel, Francis turbine, Kaplan turbine
c. Reaction turbine Impulse turbine Propeller turbine
d. None of the above
e. 3
Q. Surge wave is an example of
a. steady uniform flow
b. steady non-uniform flow
c. unsteady non-uniform flow
d. unsteady uniform flow
Q. The resultant upward pressure of a fluid on a floating body is equal to the wirght of the fluid displaced by the body. This is known as
a. Schmidt's hypothesis
b. Archimedes principle
c. Bernoulli's theorem
d. Pascals law
e. Reynolds principle
Q. A control volume refers to
a. A closed system
b. An open system
c. A isolated system
d. A fixed region in space
e. A specified mass
Q. A piece of metal weights 10 kg in air and 8 kg in water. The specific gravity of the metal is
a. 8
b. 0.8
c. 5
d. 10
e. 4
Q. The pressure force, in Newtons, on the 15 cm-dia, head light of an automobile travelling at 25 m/s is
a. 10.4
b. 6.8
c. 4.8
d. 3.2
e. 5.6