A hemispherical tank of radius (R) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to lower the level of liquid from (H1) to (H2) will be
A
B
C
D. None of the above
Answer C
The coefficient of venturifiume, generally, lies between
A. 0.3 to 0.45
B. 0.50 to 0.75
C. 0.75 to 0.95
D. 0.95 to 1.0
Answer D
A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.
A. Steady flow
B. Streamline flow
C. Turbulent
D. Unsteady
Answer B
A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is
A. 0.46
B. 0.64
C. 0.78
D. 0.87
Explanation:
Coefficient of contraction=area of jet/area of orifice. = ((3.14*32*32)/4)/((3.14*40*40)/4). = 803.84/1256 = 0.64
The hydraulic mean depth or the hydraulic radius is the ratio of
A. area of flow and wetted perimeter
B. wetted perimeter and diameter of pipe
C. velocity of flow and area of flow
Answer A
