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Hydraulics and Fluid Mechanics problems
1. The Bernoulli's equation is based on the assumption that
Options
A. there is no loss of energy of the liquid flowing
B. the velocity of flow is uniform across any cross-section of the pipe
C. no force except gravity acts on the fluid
D. all of the above
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Correct Answer: all of the above
2. The centre of buoyancy is the centre of area of the immersed body.
Options
A. Correct
B. Incorrect
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Correct Answer: Correct
3. A flow in which the volume of a fluid and its density does not change during the flow is called __________ flow.
Options
A. incompressible
B. compressible
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Correct Answer: incompressible
4. The loss of head due to an obstruction in a pipe is twice the loss of head at its entrance.
Options
A. Agree
B. Disagree
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Correct Answer: Agree
5. The discharge through a siphon spillway is
Options
A.
C
d
x
a
2
gH
B.
C
d
x
a
2
g
x
H
3/2
C.
C
d
x
a
2
g
x
H
2
D.
C
d
x
a
2
g
x
H
5/2
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Correct Answer:
C
d
x
a
2
gH
6. The centre of gravity of the volume of the liquid displaced is called
Options
A. centre of pressure
B. centre of buoyancy
C. metacentre
D. none of these
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Correct Answer: centre of buoyancy
7. In a free nappe,
Options
A. the pressure below the nappe is atmospheric
B. the pressure below the nappe is negative
C. the pressure above the nappe is atmospheric
D. the pressure above the nappe is negative
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Correct Answer: the pressure below the nappe is atmospheric
8. The maximum efficiency of transmission through a pipe is
Options
A. 50%
B. 56.7%
C. 66.67%
D. 76.66%
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Correct Answer: 66.67%
9. In a depressed nappe
Options
A. the pressure below the nappe is atmospheric
B. the pressure below the nappe is negative
C. the pressure above the nappe is atmospheric
D. the pressure above the nappe is negative
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Correct Answer: the pressure below the nappe is negative
10. One litre of water occupies a volume of
Options
A. 100 cm
3
B. 250 cm
3
C. 500 cm
3
D. 1000 cm
3
Show Answer
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Correct Answer: 1000 cm
3
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