A. Pipe length
B. Ratio of pipe diameter to orifice diameter
C. Type of orifice & the Reynolds number
D. Pipe diameter
Related Mcqs:
- Co-efficient of discharge (Cd) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about__________________?
A. 0.42
B. 0.62
C. 0.82
D. 0.98 - 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 - The ratio of actual discharge to theoretical discharge through an orifice is equal to______________?
A. Cc . Cv
B. Cc . Cd
C. Cv . Cd
D. Cd/Cv - What is the value of co-efficient of discharge for square edged circular orifice (for β = 0.3 to 0.5) ?
A. 0.61 – 0.63
B. 0.5 – 0.75
C. 0.75 – 0.90
D. 0.35 – 0.55 - With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost________________?
A. Increases
B. Decreases
C. Remains unchanged
D. Increases exponentially - For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively)?
A. Increase
B. Decrease
C. Remain constant
D. Either A. or B.; depends on other factors - Which of the following may be termed as a variable orifice flow-meter ?
A. Rotameter
B. Pitot tube
C. V-notch
D. All A., B. and C. - 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 - The fluid jet discharging from a 2″ diameter orifice has a diameter of 1.75″ at its venacontracta. The co-efficient of contraction is___________________?
A. 1.3
B. 0.766
C. 0.87
D. None of these - Co-efficient of velocity is ___________________ the coefficient of discharge?
A. Less than
B. More than
C. Equal to
D. Not related to
