The normal range of velocity of water in pipes is _______________ m/sec?

Related Mcqs:

1. The normal range of velocity of steam in pipes is _________________________ m/sec?

   A. 0.1-0.5
   B. 1-5
   C. 10-20
   D. 80-100

2. A high vapour velocity is required for high plate efficiency in a sieve plate column. The satisfactory value of operating vapor velocity for design purpose in sieve plate column is about _______________ percent of the flooding velocity?

   A. 45
   B. 60
   C. 80
   D. 95

3. Normal screwed fittings are used for pipes upto a diameter of _______________ inches?

   A. 1.5
   B. 3
   C. 5
   D. 9

4. For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft3/sec, ρ = fluid density, lb/ft3 μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches) ?

   A. Di, opt = 3.9 Q0.45 ρ0.13
   B. Di, opt = 3.9 Q0.45. μ0.95
   C. Di, opt = 4.7 Q0.36. μ3.2ρ0.13
   D. Di, opt = 3 Q0.36. μ0.88

5. Vapor velocity in a distillation column for non-foaming mixture is in the range of ______________ times the flooding velocity?

   A. 0.1 to 0.3
   B. 0.6 to 0.7
   C. 0.85 to 0.95
   D. 1.5 to 2

6. The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about _________________ mm of water column per metre height of packing?

   A. 1-5
   B. 20-40
   C. 100-150
   D. 1000-1500

7. Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as_________________?

   A. Δp = G
   B. Δp = G0.5
   C. Δp = G2
   D. Δp = 1/G0.6

8. In a shell and tube heat exchanger, tube side _______________ of the mass velocity?

   A. Heat transfer co-efficient is proportional to 0.8th power
   B. Pressure drop is proportional to the square
   C. Both A. & B.
   D. Neither A. nor B.

9. Pressure differential maintained across a continuous rotary vacuum filter is in the range of _______________ mm Hg column?

   A. 50 to 100
   B. 100 to 150
   C. 250 to 500
   D. 600 to 700

10. The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the _______________ stress?

    A. Working
    B. Damaging
    C. Allowable
    D. None of these