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GATE 2022 ME: Fluid Mechanics Quiz-9

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Question 1

The maximum efficiency of power transmission through pipe is

Question 2

The head loss in a sudden expansion from 10 cm diameter pipe to 20 cm diameter pipe, in terms of velocity V1 in the 10 cm pipe is

Question 3

Kerosene flows through a 100 mm diameter horizontal cast iron pipe (friction factor = 0.0450) of length 250 m. The volumetric flow rate is 0.2m3/s. The head loss (in m) due to friction in m, is (assume g = 9.81 m/s2)

Question 4

A 400 m long horizontal pipe is to deliver 1000 kg of oil (s = 0.9, ν = 0.0002 m2/s) per 60 seconds. If the head loss is not to exceed 800 cm of oil, the pipe diameter is _____ m.
[Friction factor for laminar flow : f = 64/Re]

Question 5

A piping system consists of three pipes arranged in series, the lengths of the pipes are 1200 m, 750 m and 600 m and diameters 750 mm, 600 mm, 450 mm respectively.  Transform the system to an equivalent 450 mm diameter pipe __________.

Question 6

Two pipes of length 2500 m each and diameters 80 cm and 60 cm respectively, are connected in parallel. The coefficient of friction for each pipe is 0.006 . The total flow is equal to 250 liters/s, the rate of flow (in liters/s) in larger pipe is _______.
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