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Home
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Mechanical Engineering
‣
Hydraulics and Fluid Mechanics
Comments
Question
The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.
Options
A. decreases
B. increases
Correct Answer
increases
Hydraulics and Fluid Mechanics problems
Search Results
1. 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
Scratch Pad
Discuss
Correct Answer: contracts
2. 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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Discuss
Correct Answer:
below
3. 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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Discuss
Correct Answer: the liquid particles at all sectons have the same velocities
4. 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
5. 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
6. A flow through an expanding tube at constant rate is called
Options
A. steady uniform flow
B. steady non-uniform flow
C. unsteady uniform flow
D. unsteady non-uniform flow
Show Answer
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Discuss
Correct Answer: steady non-uniform flow
7. When a body is placed over a liquid, it is subjected to gravitational force and upthrust of the liquid.
Options
A. True
B. False
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Discuss
Correct Answer: True
8. The critical depth meter is used to measure
Options
A. velocity of flow in an open channel
B. depth of flow in an open channel
C. hydraulic jump
D. depth of channel
Show Answer
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Discuss
Correct Answer: hydraulic jump
9. One cubic metre of water weighs
Options
A. 100 litres
B. 250 litres
C. 500 litres
D. 1000 litres
Show Answer
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Discuss
Correct Answer: 1000 litres
10. The centre of pressure acts __________ the centre of gravity of immersed surface.
Options
A. at
B. above
C. below
Show Answer
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Discuss
Correct Answer: below
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