A. Inertial forces control and viscous forces are unimportant
B. Viscous forces predominate
C. Inertial forces are unimportant and viscous forces control
D. None of these
Related Mcqs:
- Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around________________?
A. 2000
B. 10
C. 100
D. 1000 - Which of the following equations applies to the fluid flow through a packed bed for very large Reynolds number ?
A. Fanning equation
B. Blake-Plummer equation
C. Hagen-Poiseuille equation
D. Kozeny-Carman equation - The value of critical Reynolds number for pipe flow is_________________?
A. 1,300
B. 10,000
C. 100,000
D. None of these - For a given Reynolds number, in a hydraulically smooth pipe, further smoothening ____________ the friction factor?
A. Brings about no further reduction of
B. Increases
C. Decreases
D. None of these - Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will______________________?
A. Increase
B. Decrease
C. Remain same
D. Data insufficient to predict pressure drop - Which of the following is the „Blasius equation‟, relating friction factor to the Reynolds number ?
A. f = 0.079.NRe-0.25
B. f-0.5 = 4.07 loge (NRef)-0.6
C. Both ‘a’ and ‘b’
D. None of these - Creeping flow around a sphere is defined, when particle Reynolds number is___________________?
A. < 2100
B. < 0.1
C. > 2.5
D. < 500 - In the low Reynolds number region, the drag force on a sphere is proportional to_______________?
A. V
B. V2
C. V4
D. V0.5 - At low Reynolds number______________?
A. Viscous forces are unimportant
B. Viscous forces control
C. Viscous forces control and inertial forces are unimportant
D. Gravity forces control - For an ideal fluid flow, Reynolds number is___________________?
A. 2100
B. 100
C. 0
D. ∞
