Cd for the orifice plate varies from ___________________?

Related Mcqs:

1. 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

2. 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

3. 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

4. In the laminar boundary layer flow over a flat plate, the ratio (δ/x) varies as: (where, ‘δ’ is the boundary layer thickness and ‘x’ is the distance from the leading edge in the direction of flow)?

   A. Re
   B. √Re
   C. 1/Re
   D. Re-1/2

5. A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, η0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is________________?

   A. 10 KPa
   B. 20 KPa
   C. 30 KPa
   D. 40 KPa

6. For flow past a flat plate, if „x‟ is the distance along the plate in the direction of flow, the boundary layer thickness is proportional to________________?

   A. √x
   B. 1/√x
   C. x
   D. 1/x

7. The discharge through a rectangular weir varies as ___________________?

   A. H1/2
   B. H5/2
   C. H2/5
   D. H3/2

8. 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

9. 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

10. 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