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Mechanical Engineering
‣
Hydraulics and Fluid Mechanics
Comments
Question
A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.
Options
A. steady
B. streamline
C. turbulent
D. unsteady
Correct Answer
steady
Hydraulics and Fluid Mechanics problems
Search Results
1. The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.
Options
A. plus
B. minus
Show Answer
Scratch Pad
Discuss
Correct Answer: plus
2. The specific weight of compressible fluids does not remain constant.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
3. The specific weight is also known as weight density.
Options
A. Correct
B. Incorrect
Show Answer
Scratch Pad
Discuss
Correct Answer: Correct
4. When the venturimeter is inclined, then for a given flow it will show __________ reading.
Options
A. same
B. more
C. less
Show Answer
Scratch Pad
Discuss
Correct Answer: same
5. A flow is called super-sonic if the
Options
A. velocity of flow is very high
B. discharge is difficult to measure
C. Mach number is between 1and 6
D. none of these
Show Answer
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Discuss
Correct Answer: Mach number is between 1and 6
6. Venturimeter is used to
Options
A. measure the velocity of a flowing liquid
B. measure the pressure of a flowing liquid
C. measure the discharge of liquid flowing in a pipe
D. measure the pressure difference of liquid flowing between two points in a pipe line
Show Answer
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Discuss
Correct Answer: measure the discharge of liquid flowing in a pipe
7. According to Francis formula, the discharge over a rectangular weir is (where
n
= Number of end contractions)
Options
A.
Cd
(
L
-
nH
)
2
gH
B.
Cd
(
L
- 0.1
nH
)
2
g
H
3/2
C.
Cd
(
L
-
nH
)
2
g
H
2
D.
Cd
(
L
- 0.2
nH
)
2
g
H
5/2
Show Answer
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Discuss
Correct Answer:
Cd
(
L
- 0.1
nH
)
2
g
H
3/2
8. The dynamic viscosity of gases __________ with rise in temperature.
Options
A. remain unaffected
B. increases
C. decreases
Show Answer
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Discuss
Correct Answer: increases
9. According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.
Options
A. equal to
B. directly proportional
C. inversely proportional
Show Answer
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Discuss
Correct Answer: directly proportional
10. Bernoulli's equation is applied to
Options
A. venturimeter
B. orifice meter
C. pitot tube
D. all of these
Show Answer
Scratch Pad
Discuss
Correct Answer: all of these
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