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Mechanical Engineering
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Hydraulics and Fluid Mechanics
Comments
Question
In a venturiflume, the flow takes place at
Options
A. atmospheric pressure
B. gauge pressure
C. absolute pressure
D. none of these
Correct Answer
atmospheric pressure
Hydraulics and Fluid Mechanics problems
Search Results
1. A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
Options
A. notch
B. weir
C. mouthpiece
D. nozzle
Show Answer
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Discuss
Correct Answer: mouthpiece
2. An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.
Options
A. free
B. partially
C. full
Show Answer
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Discuss
Correct Answer: full
3. The coefficient of venturifiume, generally, lies between
Options
A. 0.3 to 0.45
B. 0.50 to 0.75
C. 0.75 to 0.95
D. 0.95 to 1.0
Show Answer
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Correct Answer: 0.95 to 1.0
4. A hemispherical tank of radius (
R
) containing liquid upto height (
H
1
) has an orifice of cross-sectional area (
a
) at its bottom. The time required to lower the level of liquid from (
H
1
) to (
H
2
) will be
Options
A.
B.
C.
D. none of the above
Show Answer
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Discuss
Correct Answer:
5. The discharge through a channel of rectangular section will be maximum, if
Options
A. its depth is twice the breadth
B. its breadth is twice the depth
C. its depth is thrice the breadth
D. its breadth is thrice the depth
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Correct Answer: its breadth is twice the depth
6. A nozzle placed at the end of a water pipe line discharges water at a
Options
A. low pressure
B. high pressure
C. low velocity
D. high velocity
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Correct Answer: high velocity
7. In order to avoid tendency of separation at throat in a venturimeter, the ratio of the diameter at throat to the diameter of pipe should be
Options
A.
B.
C.
D.
Show Answer
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Discuss
Correct Answer:
8. If the depth of water in an open channel is less than the critical depth, the flow is called
Options
A. critical flow
B. turbulent flow
C. tranquil flow
D. torrential flow
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Correct Answer: torrential flow
9. A fluid whose viscosity changes with the rate of deformation or shear strain is known as non-newtonian fluid.
Options
A. True
B. False
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Correct Answer: True
10. A fluid which obeys the Newton's law of viscosity is termed as
Options
A. real fluid
B. ideal fluid
C. newtonian fluid
D. non-newtonian fluid
Show Answer
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Discuss
Correct Answer: newtonian fluid
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