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Mechanical Engineering
‣
Hydraulics and Fluid Mechanics
Comments
Question
A vessel of 4 m
3
contains an oil which weighs 30 kN. The specific weight of the oil is
Options
A. 4.5 kN/m
3
B. 6 kN/m
3
C. 7.5 kN/m
3
D. 10 kN/m
3
Correct Answer
7.5 kN/m
3
Hydraulics and Fluid Mechanics problems
Search Results
1. The coefficient of discharge for an external mouthpiece depends upon
Options
A. velocity of liquid
B. pressure of liquid
C. area of mouthpiece
D. length of mouthpiece
Show Answer
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Discuss
Correct Answer: length of mouthpiece
2. Surface tension force is the product of surface tension per unit length and cross-sectional area of flow.
Options
A. Correct
B. Incorrect
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Correct Answer: Incorrect
3. According to Chezy's formula, the discharge through an open channel is (where
A
= Area of flow,
C
= Chezy's constant,
m
= Hydraulic mean depth, and
i
= Uniform slope in bed)
Options
A.
A
m
x
i
B.
C
m
x
i
C.
AC
m
x
i
D.
mi
A
x
C
Show Answer
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Correct Answer:
AC
m
x
i
4. The velocity of flow is same at all points in the cross-section of a channel.
Options
A. True
B. False
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Correct Answer: False
5. An average value of coefficient of velocity is
Options
A. 0.62
B. 0.76
C. 0.84
D. 0.97
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Correct Answer: 0.97
6. A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called
Options
A. steady flow
B. uniform flow
C. streamline flow
D. turbulent flow
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Correct Answer: streamline flow
7. In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be
Options
A. double
B. four times
C. eight times
D. sixteen times
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Correct Answer: sixteen times
8. The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.
Options
A. 0.34 times
B. 0.67 times
C. 0.81 times
D. 0.95 times
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Correct Answer: 0.81 times
9. 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
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Correct Answer: concave
10. The density of a liquid in kg/m
3
is numerically equal to its specific gravity.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
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