Test: Flow Through Pipes - 2


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10 Questions MCQ Test GATE Civil Engineering (CE) 2023 Mock Test Series | Test: Flow Through Pipes - 2

Test: Flow Through Pipes - 2 for Mechanical Engineering 2022 is part of GATE Civil Engineering (CE) 2023 Mock Test Series preparation. The Test: Flow Through Pipes - 2 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Flow Through Pipes - 2 MCQs are made for Mechanical Engineering 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Flow Through Pipes - 2 below.
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Test: Flow Through Pipes - 2 - Question 1

Three identical pipes of length L, diameter D and friction factor f, are connected in parallel between two reservoirs. The size of a pipe of length L and of same friction factor f, equivalent to the above pipes, is

Detailed Solution for Test: Flow Through Pipes - 2 - Question 1

Equivalent pipe for the pipes in parallel:


or 
or  De = 1.5518 D

Test: Flow Through Pipes - 2 - Question 2

A pipe of diameter D is to be replaced by n pipe each of diameter of laid in parallel. The value of d is given by 

Detailed Solution for Test: Flow Through Pipes - 2 - Question 2


or D5 = n2d5
or D = n2/5 D
∴ d = (D/n2/5)

Test: Flow Through Pipes - 2 - Question 3

At a sudden expansion in a horizontal pipe

Test: Flow Through Pipes - 2 - Question 4

In a pipeline, the H.G.L is above the pipe center line in the longitudinal section at point A and below the pipe center line at another point B.
From this it can be inferred that

Test: Flow Through Pipes - 2 - Question 5

In network of pipes

Test: Flow Through Pipes - 2 - Question 6

Consider the following statements:
1. Pipe network analysis is normally necessary in analyzing flow in pipes at city water systems,
2. Hardy-cross method of solving pipe network is a method of successive approximations and is not a direct method.
3. The network must satisfy the momentum equation because the flow in each pipe satisfies the head loss equation.
4. Principle of continuity is satisfied in a pipe network..

Select the correct statments:

Test: Flow Through Pipes - 2 - Question 7

The diameter of the nozzle (d) for maximum transmission of power is given by
Where
D = Diameter of pipe
f = Darcy’s friction factor
l = Length of pipe

Detailed Solution for Test: Flow Through Pipes - 2 - Question 7

For maximum power transmission through nozzle:
Nozzle diameter


A = area of supply pipe
a = area of Nozzle

Test: Flow Through Pipes - 2 - Question 8

Maximum efficiency of transmission of power through a pipe is

Detailed Solution for Test: Flow Through Pipes - 2 - Question 8

Efficiency of power transmission is given by 

For maximum efficiency

We get

Test: Flow Through Pipes - 2 - Question 9

Power transmitted through a pipe is maximum when
Where
H = total head supplied
HL = head loss due to friction

Detailed Solution for Test: Flow Through Pipes - 2 - Question 9

For maximum power transmission

Test: Flow Through Pipes - 2 - Question 10

Power transmitted through a pipe is given by
where
w = specific weight of the fluid flowing through pipe
Q = discharge, m3/s

Detailed Solution for Test: Flow Through Pipes - 2 - Question 10

Power transmitted through a pipe (When HL is frictional head)
P = wQ(H - HL)

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