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Civil Engineering (CE) Exam  >  Civil Engineering (CE) Tests  >  GATE Civil Engineering (CE) 2025 Mock Test Series  >  Test: Laminar Flow in Pipes - 1 - Civil Engineering (CE) MCQ

Test: Laminar Flow in Pipes - 1 - Civil Engineering (CE) MCQ


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10 Questions MCQ Test GATE Civil Engineering (CE) 2025 Mock Test Series - Test: Laminar Flow in Pipes - 1

Test: Laminar Flow in Pipes - 1 for Civil Engineering (CE) 2024 is part of GATE Civil Engineering (CE) 2025 Mock Test Series preparation. The Test: Laminar Flow in Pipes - 1 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Laminar Flow in Pipes - 1 MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Laminar Flow in Pipes - 1 below.
Solutions of Test: Laminar Flow in Pipes - 1 questions in English are available as part of our GATE Civil Engineering (CE) 2025 Mock Test Series for Civil Engineering (CE) & Test: Laminar Flow in Pipes - 1 solutions in Hindi for GATE Civil Engineering (CE) 2025 Mock Test Series course. Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free. Attempt Test: Laminar Flow in Pipes - 1 | 10 questions in 30 minutes | Mock test for Civil Engineering (CE) preparation | Free important questions MCQ to study GATE Civil Engineering (CE) 2025 Mock Test Series for Civil Engineering (CE) Exam | Download free PDF with solutions
Test: Laminar Flow in Pipes - 1 - Question 1
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In a laminar flow between two static parallel plates, the velocity at mid-point is found to be 2.0 m/s. If the space between the plates is 10 cm, then the discharge per unit width (in m3/s/m) will be

Detailed Solution for Test: Laminar Flow in Pipes - 1 - Question 1

The average velocity
= 2/3 x 2 = 4/3 m/s
The discharge per unit width
= 4/3 x 0.1 = 0.13 m3/s/m

Test: Laminar Flow in Pipes - 1 - Question 2
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An oil of viscosity 9 poise is flowing through a horizontal pipe of 60 mm diameter. If the flow is laminar, the pressure drop in 100 m length of the pipe is 1800 kN/m2. The average velocity of flow of the oil is

Detailed Solution for Test: Laminar Flow in Pipes - 1 - Question 2

1 poise = 0.1 N-s/m2 
∴ 

∴ 

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Test: Laminar Flow in Pipes - 1 - Question 3
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The Chezy's coefficient C is related to Darcy- Weisbach friction factor ‘f’ as

Detailed Solution for Test: Laminar Flow in Pipes - 1 - Question 3

(Darcy-Weisbach equation for non- circular section)


Equating both equations, we get 

Test: Laminar Flow in Pipes - 1 - Question 4
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A circular pipe of radius R carries a laminar flow of a fluid. The average velocity is indicated as the local velocity at what radial distance, measured from the centre?
Detailed Solution for Test: Laminar Flow in Pipes - 1 - Question 4

For laminar flow in a circular pipe, the local velocity may be given as,

For laminar flow in a circular pipe, the average velocity may be given as,
    ......(ii)

Equating (i) and (ii), we get,

Test: Laminar Flow in Pipes - 1 - Question 5
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The velocity at which the laminar flow ceases, is known as
Detailed Solution for Test: Laminar Flow in Pipes - 1 - Question 5

Lower Critical Velocity: Lower Critical Velocity is the speed at which laminar flow ceases or shifts from laminar to transition period.

Test: Laminar Flow in Pipes - 1 - Question 6
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The ratio of maximum velocity to average velocity for steady flow between fixed parallel plates is:
Detailed Solution for Test: Laminar Flow in Pipes - 1 - Question 6

For a laminar flow between parallel plates:

Test: Laminar Flow in Pipes - 1 - Question 7
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The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is
Detailed Solution for Test: Laminar Flow in Pipes - 1 - Question 7

Shear stress distribution between the parallel plates is given by,

It has same maximum value at either boundary and decreases linearly to zero at the mid plane.

Test: Laminar Flow in Pipes - 1 - Question 8
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The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is
Test: Laminar Flow in Pipes - 1 - Question 9
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Consider the following statements with reference to steady laminar flow
1. shear stress is zero at the centre.
2. discharge varies directly with viscosity of the fluid flowing.
3. velocity is maximum at the centre.
4. hydraulic gradient varies directly with the velocity.

Which of these statements is/are correct?
Detailed Solution for Test: Laminar Flow in Pipes - 1 - Question 9


Test: Laminar Flow in Pipes - 1 - Question 10
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In a laminar flow through a circle pipe of diameter 20 cm, the maximum velocity is found to be 1 m/s. The velocity at a radial distance of 5 cm from the axis of the pipe will be
Detailed Solution for Test: Laminar Flow in Pipes - 1 - Question 10


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