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Home
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Mechanical Engineering
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Hydraulics and Fluid Mechanics
Comments
Question
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
Correct Answer
directly proportional to (density)
1/2
of fluid
Hydraulics and Fluid Mechanics problems
Search Results
1. 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
2. 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
3. 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
Show Answer
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Discuss
Correct Answer: weir
4. 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
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Correct Answer: the available head of liquid is less than 5 times the height of orifice
5. 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
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Discuss
Correct Answer: gravity force
6. 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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Correct Answer:
C
c
x
C
v
7. 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
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Correct Answer: the liquid particles at all sectons have the same velocities
8. The depth of centre of pressure lor an immersed surface inclined at an angle ? with the liquid surface lies at a distance equal to __________ the centre of gravity.
Options
A.
below
B.
above
C.
below
D.
above
Show Answer
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Correct Answer:
below
9. The length of a liquid stream while flowing over a weir __________ at the ends of the sill.
Options
A. expands
B. does not change
C. contracts
Show Answer
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Correct Answer: contracts
10. The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.
Options
A. decreases
B. increases
Show Answer
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Discuss
Correct Answer: increases
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