Related Mcqs:

1. 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

2. Vena-contracta formed during flow of a liquid through an orificemeter has__________________?

   A. Minimum liquid cross-section
   B. More diameter compared to orifice diameter
   C. Minimum velocity of fluid stream
   D. None of these

3. 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

4. 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

5. 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

6. 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)

7. Pressure drag does not depend upon the_________________?

   A. Roughness of surface of the body
   B. Pressure of main flow only
   C. Length of the body in flow direction
   D. All A., B. and C.

8. Theoretical head developed by a centrifugal pump does not depend upon the _____________ the impeller?

   A. Radius of
   B. Speed of
   C. Fluid velocity leaving
   D. None of these

9. Drag force acting on a body does not depend upon the____________________?

   A. Density of the fluid
   B. Density of the body
   C. Velocity of the body
   D. Projected area of the body

10. The discharge co-efficient for an orifice meter does not depend upon the ___________________?

    A. Pipe length
    B. Ratio of pipe diameter to orifice diameter
    C. Type of orifice & the Reynolds number
    D. Pipe diameter