Exercise: Hydraulics And Fluid Mechanics

Questions for: Hydraulics And Fluid Mechanics

In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be
A:
double
B:
four times
C:
eight times
D:
sixteen times
Answer: D
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The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.
A:
0.34 times
B:
0.67 times
C:
0.81 times
D:
0.95 times
Answer: C
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The length of a liquid stream while flowing over a weir __________ at the ends of the sill.
A:
expands
B:
does not change
C:
contracts
D:
Answer: C
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The velocity of flow is same at all points in the cross-section of a channel.
A:
True
B:
False
C:
D:
Answer: B
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When a body is placed over a liquid, it is subjected to gravitational force and upthrust of the liquid.
A:
True
B:
False
C:
D:
Answer: A
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