A. Minimum liquid cross-section
B. More diameter compared to orifice diameter
C. Minimum velocity of fluid stream
D. None of these
Related Mcqs:
- Cd, Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficient, Cc = co-efficient of contraction = (area of jet at vena-contracta/area of opening), Cv = co-efficient of velocity = (actual velocity at vena-contracta/theoretical velocity)?
A. Cd = Cc/Cv
B. Cd = Cc.Cv
C. Cd = Cv/ Cc
D. None of these - Vena-contracta pressure tapping is at a distance _______________ from the position of an orificemeter fitted in a pipe of internal diameter ‘d’ ?
A. d
B. 0.5 d
C. 2d
D. 4d - Location of vena-contracta in an orificemeter does not depend upon the________________?
A. Type of orifice
B. Density, viscosity & compressibility of the fluid
C. Ratio of pipe diameter to orifice diameter
D. Pipe roughness - The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by_____________________?
A. Cv . √(2gH)
B. Cc . √(2gH)
C. Cd . √(2gH)
D. Cv . Va - For flow through an orifice from a reservoir, the actual velocity at the vena contracta is given by _________________?
A. √(2gh)
B. C.V. √(2gh)
C. Cd √(2gh)
D. Cc √(2gh) - What is the co-efficient of contraction, if a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena-contracta ?
A. 0.64
B. 1.65
C. 0.32
D. 0.94 - A mercury (specific gravity = 13.6) manometer connected across an orificemeter fitted in a pipe shows a manometer reading of 2 cms. If the manometer liquid is changed to carbon tetrachloride (specific gravity = 1.6), then for the same flow rate of water the new manometer reading will be _______________ cms?
A. 17
B. 42
C. 84
D. 1.8 - In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ?
A. Discharge of water by a centrifugal pump being run at a constant rpm
B. Water flow in the suction and discharge pipe of a reciprocating pump
C. Water discharge from a vertical vessel in which constant level is maintained
D. Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe - Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?
A. A, C, D
B. B, D, E
C. A, B, E
D. A, D, E - With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss_______________?
A. Decreases
B. Increases
C. Remain constant
D. Increases linearly
