Exercise: Hydraulics And Fluid Mechanics

Questions for: Hydraulics And Fluid Mechanics

The point at which the resultant pressure on an immersed surface acts, is known as
A:
centre of gravity
B:
centre of depth
C:
centre of pressure
D:
centre of immersed surface
Answer: C
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The metacentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
A:
4.1 s
B:
5.2 s
C:
10.4 s
D:
14.1 s
Answer: C
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A differential manometer is used to measure
A:
atmospheric pressure
B:
pressure in pipes and channels
C:
pressure in venturimeter
D:
difference of pressures between two points in a pipe
Answer: D
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Coefficient of velocity is defined as the ratio of
A:
actual velocity of jet at vena contracta to the theoretical velocity
B:
area of jet at vena contracta to the area of orifice
C:
actual discharge through an orifice to the theoretical discharge
D:
none of the above
Answer: A
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The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)
A:
B:
C:
D:
Answer: D
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