Flow through Pipe Starter Quiz

For flow of SAE 10 oil through a 100mm diameter pipe, what flow rate in m³/hr would we expect for transition to turbulence?

(use 3π =10, μ = 0.1 Pa-S, ρ = 800kg/m³, R_critical =2400)

Identify the correct statements-

1) Hardy cross method is applicable in pipe network as well as in open channel flow.

2) Triangular notch is preferred over rectangular notch of measuring low discharge.

The diameter of a tapered pipe reduces from 2D to D over a length of L. The head loss due to friction is x times the head loss through friction had it been a pipe of constant diameter D. The value of x is.

Hardy cross method is used to analyse pipe network in which ⇒ h_f = kQⁿ, where n = 1.8

The modification factor in discharge (ΔQ) will be

The ratio of head loss through a pipe in which water is discharged from site at a uniform rate at regular intervals and the end is closed, to the head loss through a pipe carrying uniform discharge.

Two reservoirs with water levels 180.00 and 150.00 are connected by a pipe line 500 mm in diameter and 2000 m long. The pipe line crosses a ridge whose summit is 15 m above the level of water surface in upper reservoir and 200 m distant from the higher reservoir. Find the minimum depth (in m) below the ridge at which the pipe must be laid if separation occurs at 2m of water absolute. Take f = 0.04 and atmospheric pressure = 10m of water. Report your answer correct to two decimal places.

A pipe line connecting two reservoirs has its diameter reduced by 20% due to deposition of chemicals. For a given head difference in the reservoir with unaltered friction factor, this would cause reduction in discharge of ____%