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Civil Engineering (CE) Exam  >  Civil Engineering (CE) Tests  >  Topicwise Question Bank for Civil Engineering  >  Test: Dimensional & Model Analysis - 2 - Civil Engineering (CE) MCQ

Test: Dimensional & Model Analysis - 2 - Civil Engineering (CE) MCQ


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10 Questions MCQ Test Topicwise Question Bank for Civil Engineering - Test: Dimensional & Model Analysis - 2

Test: Dimensional & Model Analysis - 2 for Civil Engineering (CE) 2024 is part of Topicwise Question Bank for Civil Engineering preparation. The Test: Dimensional & Model Analysis - 2 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Dimensional & Model Analysis - 2 MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Dimensional & Model Analysis - 2 below.
Solutions of Test: Dimensional & Model Analysis - 2 questions in English are available as part of our Topicwise Question Bank for Civil Engineering for Civil Engineering (CE) & Test: Dimensional & Model Analysis - 2 solutions in Hindi for Topicwise Question Bank for Civil Engineering course. Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free. Attempt Test: Dimensional & Model Analysis - 2 | 10 questions in 30 minutes | Mock test for Civil Engineering (CE) preparation | Free important questions MCQ to study Topicwise Question Bank for Civil Engineering for Civil Engineering (CE) Exam | Download free PDF with solutions
Test: Dimensional & Model Analysis - 2 - Question 1
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Apart from inertia force, which of the following forces is most important in motion of submarines underwater?

Test: Dimensional & Model Analysis - 2 - Question 2
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Assuming that the thrust T of a propeller depends on the diameter D, speed of advance V, angular velocity ω, dynamic viscosity μ and mass density ρ, which of the following ’non -dimensional parameters can be derived ‘by dimensional analysis?

Detailed Solution for Test: Dimensional & Model Analysis - 2 - Question 2

Number of variables = 6
Number of dimensions = 3
Dimensionless parameters = 6 - 3 = 3.
Take D, V, and ρ as repeating variables.
VD/μ will not be dimensionless- number as its dimension is [M-1L3].

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Test: Dimensional & Model Analysis - 2 - Question 3
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Which of the following could be a π-parameter of the function f(F, V, r, m, L) = 0 when V, r and L are taken as repeating variables?

Detailed Solution for Test: Dimensional & Model Analysis - 2 - Question 3

A π parameter is constant and has zero dimensional unit i.e. M°L°T°.

Test: Dimensional & Model Analysis - 2 - Question 4
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Match List-I (Flow problem under study) with List-ll (Model law) and select the correct answer using the codes given below the lists:
List-I
1. Rise of gas bubbles in liquid
2. Flow of gas in a pipe
3. Flow over a spillway dam
4. Flight of supersonic jet

List-II
A. Euler number
B. Froude number
C. Mach number
D. Reynold’s number
E. Weber’s number 
Test: Dimensional & Model Analysis - 2 - Question 5
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A ship’s model of scale 1 : 100 had a wave resistance of 1 kg at its design speed. The corresponding wave resistance in prototype will be
Detailed Solution for Test: Dimensional & Model Analysis - 2 - Question 5


Froude model is applicable here because of influence of gravity force using froude model law,



or, Fp = 1000000 kg

Test: Dimensional & Model Analysis - 2 - Question 6
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If the velocity, bulk modulus of elasticity and the mass density of a fluid are denoted by U, K and ρ respectively, then the Mach number is given by
Detailed Solution for Test: Dimensional & Model Analysis - 2 - Question 6

Mach number U/C = 

Test: Dimensional & Model Analysis - 2 - Question 7
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Euler’s equation of motion
Detailed Solution for Test: Dimensional & Model Analysis - 2 - Question 7

max = (fg)x + (fp)x + (fn)x + (ft)x
→ Reynold’s equation
fg → Due to gravity
fp → Due to pressure
fn → Due to viscosity
ft → Due to turbulence
max = (fg)x + (fp)x → Euler’s equation
(Neglected viscous force vand force due to turbulence)

Test: Dimensional & Model Analysis - 2 - Question 8
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A model of reservoir is emptied in 10 minutes. If the model scale is 1:25, the time taken by the prototype to empty itself, would be
Detailed Solution for Test: Dimensional & Model Analysis - 2 - Question 8


∴ tp = 5tm = 5 x 10 = 50 min

Test: Dimensional & Model Analysis - 2 - Question 9
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When Mach number is more than 6, the flow is called
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when the Mach number in flow region is slightly less to slightly greater than 1, flow is transonic flow.

Test: Dimensional & Model Analysis - 2 - Question 10
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A harbour model has a horizontal scale of 1/150 and a vertical scale of 1/60. The interval between successive high tides in the model will be nearly
Detailed Solution for Test: Dimensional & Model Analysis - 2 - Question 10


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