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Mechanical Engineering
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Hydraulics and Fluid Mechanics
Comments
Question
If the depth of water in an open channel is greater than the critical depth, the flow is called
Options
A. critical flow
B. turbulent flow
C. tranquil flow
D. torrential flow
Correct Answer
tranquil flow
Hydraulics and Fluid Mechanics problems
Search Results
1. The pressure of a liquid measured with the help of a piezometer tube is
Options
A. vacuum pressure
B. gauge pressure
C. absolute pressure
D. atmospheric pressure
Show Answer
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Discuss
Correct Answer: gauge pressure
2. The ratio of the inertia force to the viscous force is called
Options
A. Reynold's number
B. Froude's number
C. Weber's number
D. Euler's number
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Discuss
Correct Answer: Reynold's number
3. Turbulent flow takes place at high velocities.
Options
A. Agree
B. Disagree
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Correct Answer: Agree
4. The value of coefficient of discharge is __________ the value of coefficient of velocity.
Options
A. less than
B. same as
C. more than
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Correct Answer: less than
5. When a cylindrical vessel of radius (
r
) containing liquid is revolved about its vertical axis ? rad/s, then depth of parabola which the liquid assumes is
Options
A.
B.
C.
D.
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Correct Answer:
6. A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.
Options
A. coincides with
B. lies below
C. lies above
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Correct Answer: lies below
7. A fluid whose viscosity does not change with the rate of deformation or shear strain is known as
Options
A. real fluid
B. ideal fluid
C. newtonian fluid
D. non-newtonian fluid
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Correct Answer: newtonian fluid
8. The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is
Options
A.
B.
C.
D.
Show Answer
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Correct Answer:
9. The total pressure on an immersed surface inclined at an angle ? with the liquid surface is
Options
A.
wA
B.
w
x
C.
wA
x
D.
wA
x
/sin ?
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Correct Answer:
wA
x
10. The flow in a pipe or channel is said to be non-uniform when
Options
A. the liquid particles at all sections have the same velocities
B. the liquid particles at different sections have different velocities
C. the quantity of liquid flowing per second is constant
D. each liquid particle has a definite path
Show Answer
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Discuss
Correct Answer: the liquid particles at different sections have different velocities
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