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Fluid Mechanics MCQ
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1. The atmospheric pressure at sea level is
360 mm of mercury
600 mm of mercury
660 mm of mercury
760 mm of mercury
2. A flow in which the quantity of liquid flowing per second is constant is called
Turbulent flow
Steady flow
Streamline flow
Unsteady flow
3. The science that considers the forces causing flow of fluids is known as
Statics of fluid
Dynamics of fluid
Kinematics of fluid
None of these
4. The dynamics of fluid in which normal stresses and shear stresses in all the three mutually perpendicular directions is considered is known as
Bernoulli's theory
Euler's theory
Reynolds theory
Navier-Stokes theory
5. The depth of flow of water in a channel corresponding to the minimum specific energy is known as
Hydraulic gradient line
Hydraulic radius
Critical depth
None of the above
6. Stoke is the unit of
Kinematic viscocity
Dynamic viscocity
Specific volume
Specific weight
7. Newton's law of viscocity states that shear stress is directly proportional to
Velocity gradient
Viscocity
Shear strain
Velocity
8. Dimension of dynamic viscocity is
MLT-1
MLT-2
ML2T-1
ML-1T-1
9. The property of water to wet a solid surface when it comes in contact is known as
Capillary action
Vapour pressure
Viscocity
Surface tension
10. 1 pascal pressure is equal to
1 m water pressure
10.01 m water pressure
0.01 m water pressure
0.0001 m water pressure
11. A Newtonian fluid is defined as the fluid which
obeys Newton's law of viscosity
is incompressible and viscous
is compressible and non viscous
is highly viscous
12. Maximum loss of head in flow through pipe is due to
an outlet
friction
sudden contraction
sudden enlargement
13. The viscosity of a gas
is independent of pressure for very high pressure intensities
is independent of temperature
increases with increase in temperature
decreases with increase in temperature
14. The motion of air mass in a tornado is a
forced vortex at centre and free vortex outside
free vortex at centre and forced vortex outside
forced vortex motion
free vortex motion
15. Apart from inertia force, which of the following forces is most important in motion of submarines under water?
surface tension force
compressive force
gravity force
viscous force
16. Equation of continuity is based on the principle of conservation of
momentum
energy
mass
none of the above
17. The reciprocal of coefficient of compressibility is know n as
bulk modulus of elasticity
capillary action
viscocity
vapour pressure
18. Surface tension is a
force per unit volume
force per unit surface area
llne force
all the above
19. For measuring small difference of pressure
mercury manometers are used
micromanometer is used
differential manometer is advantageous
simple manometer is preferred
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