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Home
‣
Mechanical Engineering
‣
Hydraulics and Fluid Mechanics
Comments
Question
A structure used to dam up a stream or river over which the water flows is called
Options
A. orifice
B. notch
C. weir
D. dam
Correct Answer
weir
Hydraulics and Fluid Mechanics problems
Search Results
1. An orifice is said to be large, if
Options
A. the size of orifice is large
B. the velocity of flow is large
C. the available head of liquid is more than 5 times the height of orifice
D. the available head of liquid is less than 5 times the height of orifice
Show Answer
Scratch Pad
Discuss
Correct Answer: the available head of liquid is less than 5 times the height of orifice
2. Froude's number is the ratio of inertia force to
Options
A. pressure force
B. elastic force
C. gravity force
D. surface tension force
Show Answer
Scratch Pad
Discuss
Correct Answer: gravity force
3. Bulk modulus of a fluid is the ratio of
Options
A. shear stress to shear strain
B. increase in volume to the viscosity of fluid
C. increase in pressure to the volumetric strain
D. critical velocity to the viscosity of fluid
Show Answer
Scratch Pad
Discuss
Correct Answer: increase in pressure to the volumetric strain
4. The density of a liquid in kg/m
3
is numerically equal to its specific gravity.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
5. When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.
Options
A. concave
B. convex
Show Answer
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Discuss
Correct Answer: concave
6. Select the wrong statement
Options
A. An equivalent pipe is treated as an ordinary pipe for all calculations
B. The length of an equivalent pipe is equal to that of a compound pipe
C. The discharge through an equivalent pipe is equal to that of a compound pipe
D. The diameter of an equivalent pipe is equal to that of a compound pipe
Show Answer
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Discuss
Correct Answer: The diameter of an equivalent pipe is equal to that of a compound pipe
7. When a liquid is flowing through a pipe, the velocity of the liquid is
Options
A. maximum at the centre and minimum near the walls
B. minimum at the centre and maximum near the walls
C. zero at the centre and maximum near the walls
D. maximum at the centre and zero near the walls
Show Answer
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Discuss
Correct Answer: maximum at the centre and minimum near the walls
8. The pressure of fluid due to hammer blow is
Options
A. directly proportional to density of fluid
B. inversely proportional to density of fluid
C. directly proportional to (density)
1/2
of fluid
D. inversely proportional to (density)
1/2
of fluid
Show Answer
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Discuss
Correct Answer: directly proportional to (density)
1/2
of fluid
9. Coefficient of discharge Cd is equal to (where
C
c
= Coefficient of contraction,
C
v
= Coefficient of velocity, and
C
r
= Coefficient of resistance)
Options
A.
C
c
x
C
v
B.
C
c
x
C
r
C.
C
v
x
C
r
D.
C
c
/
C
r
Show Answer
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Discuss
Correct Answer:
C
c
x
C
v
10. The flow in a pipe or channel is said to be uniform when
Options
A. the liquid particles at all sectons 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
Scratch Pad
Discuss
Correct Answer: the liquid particles at all sectons have the same velocities
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