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

Related Mcqs:

1. 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...

2. 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...

3. 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...

4. 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...

5. 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...

6. 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...

7. 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....

8. 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...

9. 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...

10. Co-efficient of velocity is ___________________ the coefficient of discharge?

    A. Less than B. More than C. Equal to D. Not related to...