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

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 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. Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles) no change in the_______________?

   A. Drag on particles
   B. Drag on column walls
   C. Bed height
   D. Bed voidage

5. The percentage slip in a reciprocating pump set is given by the % of (where, Q1 = actual discharge Q2 = theoretical discharge) ?

   A. Q1/Q2
   B. Q2/Q1
   C. (Q2 – Q1)/Q1
   D. (Q2 – Q1)/Q2

6. 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

7. The co-efficient of discharge of an orificemeter is a function of ________________?

   A. Reynolds number at the orifice
   B. Ratio of orifice dia to pipe dia
   C. Both A. and B.
   D. None of the above parameters, and has a constant value of 0.61

8. 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

9. Venturimeters, orificemeters and nozzles are used to measure the fluid discharge from a pipeline. The average fluid velocity in a pipeline can be measured by a/an________________?

   A. Weir
   B. Hot wire anemometer
   C. Cup and vane anemometer
   D. None of these

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

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