Exercise: Hydraulics And Fluid Mechanics

Questions for: Hydraulics And Fluid Mechanics

In a free nappe,
A:
the pressure below the nappe is atmospheric
B:
the pressure below the nappe is negative
C:
the pressure above the nappe is atmospheric
D:
the pressure above the nappe is negative
Answer: A
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Coefficient of contraction is the ratio of
A:
actual velocity of jet at vena contracta to the theoretical velocity
B:
loss of head in the orifice to the head of water available at the exit of the orifice
C:
actual discharge through an orifice to the theoretical discharge
D:
area of jet at vena contracta to the area of orifice
Answer: D
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The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly enlarged to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden enlargement is
A:
B:
C:
D:
Answer: C
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An error of 1% in measuring head over the apex of the notch (H) will produce an error of __________ in discharge over a triangular notch.
A:
1%
B:
1.5%
C:
2%
D:
2.5%
Answer: D
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A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)
A:
wH
B:
wH/2
C:
wH2/2
D:
wH2/3
Answer: C
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