Question

Friction factor for a hydraulically smooth pipe at Nʀₑ = 2100 is f₁. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of Nʀₑ, will

a.

increase.

b.

decrease.

c.

remain unchanged.

d.

increase or decrease depending on the pipe material.

Answer: (a).increase.

Interact with the Community - Share Your Thoughts

Uncertain About the Answer? Seek Clarification Here.

Understand the Explanation? Include it Here.

Q. Friction factor for a hydraulically smooth pipe at Nʀₑ = 2100 is f₁. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of Nʀₑ,...

Similar Questions

Explore Relevant Multiple Choice Questions (MCQs)

Q. For the laminar flow of a fluid in a circular pipe of radius R, the Hagen-Poisseule equation predicts the volumetric flow rate to be proportional to

Q. Interstage coolers are provided in a multistage compressor to

Q. The ratio of the wall drag to the form drag in the Stoke's law range (for motion of spherical particles in a stationary fluid) is

Q. For turbulent flow in smooth circular pipe, the velocity distribution is a function of the distance 'd' measured from the wall of the pipe and the friction velocity 'v', and it follows a __________ relationship.

Q. Maintenance cost of a __________ pump for a particular duty is the least.

Q. Choking in case of pipe flow means that a

Q. Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.

Q. The nominal size of a hose pipe is specified by its

Q. Transition from laminar flow to turbulent flow is aided by the

Q. For flow of fluids through packed bed, the superficial velocity is

Q. Cd is always __________ Cc.

Q. Buoyant force

Q. Which of the following options will facilitate the achievement of a very high head (say 30 metres) in case of a centrifugal pump?

Q. An equipotential line is __________ to the velocity vector at every point.

Q. Path followed by water jet issuing from the bottom of a water tank will be a

Q. Which of the following produces maximum pressure difference for transportation of gases ?

Q. Drag co-efficient in hindered settling is __________ that in free settling.

Q. Efficiency of power transmission (η) through a circular pipe is given by (ht - hf)/ht, which has a maximum value of __________ percent.

Q. One dimensional fluid flow implies the

Q. __________ forces act on a particle moving through a stationary fluid.

Recommended Subjects

Are you eager to expand your knowledge beyond Basic Chemical Engineering? We've handpicked a range of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!