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Mechanical Engineering
‣
Hydraulics and Fluid Mechanics
Comments
Question
The pressure measured with the help of a piezometer tube is in
Options
A. N/mm
2
B. N/m
2
C. head of liquid
D. all of these
Correct Answer
head of liquid
Hydraulics and Fluid Mechanics problems
Search Results
1. When a tube of smaller diameter is dipped in water, the water rises in the tube due to viscosity of water.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
2. A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
Options
A. equal to.
B. less than
C. more than
Show Answer
Scratch Pad
Discuss
Correct Answer: more than
3. According to equation of continuity,
Options
A.
w
1
a
1
=
w
2
a
2
B.
w
1
v
1
=
w
2
v
2
C.
a
1
v
1
=
a
2
v
2
D.
a
1
/
v
1
=
a
2
/
v
2
Show Answer
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Discuss
Correct Answer:
a
1
v
1
=
a
2
v
2
4. In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.
Options
A. less than
B. more than
Show Answer
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Discuss
Correct Answer: less than
5. The discharge over a rectangular notch is (where
b
= Width of notch, and
H
= Height of liquid, above the sill of the notch)
Options
A.
C
d
x
b
2
gH
B.
C
d
x
b
2
g
x
H
C.
C
d
x
b
2
g
x
H
3/2
D.
C
d
x
b
2
g
x
H
2
Show Answer
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Discuss
Correct Answer:
C
d
x
b
2
g
x
H
3/2
6. The coefficient of viscosity may be determined by
Options
A. capillary tube method
B. orifice type viscometer
C. rotating cylinder method
D. all of these
Show Answer
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Discuss
Correct Answer: all of these
7. The total energy line lies over the hydraulic gradient line by an amount equal to the
Options
A. pressure head
B. velocity head
C. pressure head + velocity head
D. pressure head - velocity head
Show Answer
Scratch Pad
Discuss
Correct Answer: velocity head
8. Euler's equation in the differential form for the motion of liquids is given by
Options
A.
B.
C. ?.
dp
+
g
.
dz
+
v
.
dv
= 0
D. ?.
dp
-
g
.
dz
+
v
.
dv
= 0
Show Answer
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Discuss
Correct Answer:
9. The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.
Options
A. equal to
B. less than
C. more than
Show Answer
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Discuss
Correct Answer: less than
10. The kinematic viscosity is the
Options
A. ratio of absolute viscosity to the density of the liquid
B. ratio of density of the liquid to the absolute viscosity
C. product of absolute viscosity and density of the liquid
D. product of absolute viscosity and mass of the liquid
Show Answer
Scratch Pad
Discuss
Correct Answer: ratio of absolute viscosity to the density of the liquid
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Cd x b
