All Courses
Get the App Signup / Login
Sign in Open App
Mechanical Engineering Exam  >  Mechanical Engineering Tests  >  Fluid Mechanics for Mechanical Engineering  >  Test: Dimensional Analysis & Modeling - Mechanical Engineering MCQ

Test: Dimensional Analysis & Modeling - Mechanical Engineering MCQ


Test Description

15 Questions MCQ Test Fluid Mechanics for Mechanical Engineering - Test: Dimensional Analysis & Modeling

Test: Dimensional Analysis & Modeling for Mechanical Engineering 2024 is part of Fluid Mechanics for Mechanical Engineering preparation. The Test: Dimensional Analysis & Modeling questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Dimensional Analysis & Modeling MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Dimensional Analysis & Modeling below.
Solutions of Test: Dimensional Analysis & Modeling questions in English are available as part of our Fluid Mechanics for Mechanical Engineering for Mechanical Engineering & Test: Dimensional Analysis & Modeling solutions in Hindi for Fluid Mechanics for Mechanical Engineering course. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free. Attempt Test: Dimensional Analysis & Modeling | 15 questions in 20 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study Fluid Mechanics for Mechanical Engineering for Mechanical Engineering Exam | Download free PDF with solutions
Test: Dimensional Analysis & Modeling - Question 1
Save

Froude number is significant in

Detailed Solution for Test: Dimensional Analysis & Modeling - Question 1
Froude No = √ Inertial force / Gravity force

So, Froude number is significant when gravity forces have strong influence.

Test: Dimensional Analysis & Modeling - Question 2
Save

In similitude with gravity force, where equality of Froude number exists, the velocity ratio becomes

where Lr = ratio of linear dimensions of model and prototype.

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

When similitude of gravity forces exists and Froude number are equal i.e.,

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Dimensional Analysis & Modeling - Question 3
Save

Consider the following statements:

1. At low Reynolds numbers of any flow, viscous forces dominate over inertial forces. 2. Transition from laminar to turbulent flow occurs over a range of Reynolds number depending on the surface presented to the flow.

Which of the above statements is/are correct?

Detailed Solution for Test: Dimensional Analysis & Modeling - Question 3
Reynolds number is the ratio of inertial force to viscous force. So for low Reynolds number, viscous force > inertial force. The critical value of Reynolds number depends on the surface on which the flow occurs. So both the statements are true.

Test: Dimensional Analysis & Modeling - Question 4
Save

The laminar flow is characterized by Reynolds number which is
Detailed Solution for Test: Dimensional Analysis & Modeling - Question 4
For the flow to be laminar, the Reynolds number of the flow must be less than the critical Reynolds number.

Test: Dimensional Analysis & Modeling - Question 5
Save

Laminar flow between closely spaced parallel plates is governed by the consideration of which one of the following pairs of forces?
Detailed Solution for Test: Dimensional Analysis & Modeling - Question 5
For laminar flow between parallel plates, viscous and inertial forces are the most significant forces. Laminar flow can occur even when no pressure or gravitational forces play an effect, for example, the laminar flow between one fixed and one moving plate when both the plates are horizontal and exposed to the atmosphere are not affected by either pressure or gravity force. But for flow to be laminar, viscous forces must exist.

Test: Dimensional Analysis & Modeling - Question 6
Save

The unit of the following property is not m2⁄s
Detailed Solution for Test: Dimensional Analysis & Modeling - Question 6
Although you can check the units of all the four options, it will be wise to note that option (B) and (C) can never have the same units. So if you check just the two options you will see that dynamic viscosity has the unit of Pa-s.

Test: Dimensional Analysis & Modeling - Question 7
Save

In flow through a pipe, the transition from laminar to turbulent flow does not depend on
Detailed Solution for Test: Dimensional Analysis & Modeling - Question 7
For flow through pipe, the characteristic length is the diameter of pipe and not the length of the pipe. So the Reynolds number in pipe flow depends on velocity, viscosity, density of fluid and the diameter of pipe, but not the length of pipe.

Test: Dimensional Analysis & Modeling - Question 8
Save

In a compressible fluid flow field, the Mach number indicates the ratio of
Test: Dimensional Analysis & Modeling - Question 9
Save

Weber number is ratio of square root of inertial force to
Test: Dimensional Analysis & Modeling - Question 10
Save

Assertion (A): In fluid system model studies, a simple scaling-up of measurements made on the model may not yield results accurately corresponding to the prototype.

Reason (R): Surface tension forces may be relatively much more significant in the model than in the prototype.
Detailed Solution for Test: Dimensional Analysis & Modeling - Question 10
For many fluid systems, the forces on models and prototypes may not be in the ratio of their geometric scales and it depends on the various kinds of forces that hold significance in case of models and prototype. For example, due to the small size of the model, the capillary effects may be significant in a model whereas it will not hold significance on larger size prototypes. So both the statements are correct and R is the correct explanation of A.

Test: Dimensional Analysis & Modeling - Question 11
Save

What are the forces that influence the problem of fluid statics?
Detailed Solution for Test: Dimensional Analysis & Modeling - Question 11
For static fluid, viscous force is absent. If the quantity of fluid is large, surface tension force is negligible. So the only forces worth considering in case of static fluid are gravity and pressure forces.

Test: Dimensional Analysis & Modeling - Question 12
Save

The time period of a simple pendulum depends on its effective length l and the local acceleration due to gravity g. What is the number of dimensionless parameters involved?
Detailed Solution for Test: Dimensional Analysis & Modeling - Question 12
Number of variables (m) = 3 (Time period, length and gravity) Number of fundamental dimensions (n) = 3 (M, L and T) Number of dimensionless terms = m − n = 0

Test: Dimensional Analysis & Modeling - Question 13
Save

What is the correct dimensionless group formed with the variables ρ­density, Rotational speed, diameter and μ­coefficient of viscosity?
Detailed Solution for Test: Dimensional Analysis & Modeling - Question 13

For a dimensionless group to form ρ / μ or μ / ρ should exist (to make the power of M to zero) which eliminates c, and d. checking option (B) gives

Test: Dimensional Analysis & Modeling - Question 14
Save

Viscosity has the dimension of
Detailed Solution for Test: Dimensional Analysis & Modeling - Question 14
We know

Test: Dimensional Analysis & Modeling - Question 15
Save

A model of a golf ball is to be studied to determine the effects of the dimples. A sphere 10 times larger in diameter than an actual golf ball is used in the wind tunnel study. What speed should be selected for the model to simulate a prototype speed of 50 m ⁄ s ?
Detailed Solution for Test: Dimensional Analysis & Modeling - Question 15
dm = 10 dp

Vp = 50 m/s

Vm =?

Assuming viscous effects are dominant and applying dynamic similarity

56 videos|104 docs|75 tests
Join Course
Information about Test: Dimensional Analysis & Modeling Page
In this test you can find the Exam questions for Test: Dimensional Analysis & Modeling solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Dimensional Analysis & Modeling , EduRev gives you an ample number of Online tests for practice

Top Courses for Mechanical Engineering

Download as PDF

Top Courses for Mechanical Engineering

Important Questions for Dimensional Analysis & Modeling

Find all the important questions for Dimensional Analysis & Modeling at EduRev.Get fully prepared for Dimensional Analysis & Modeling with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Dimensional Analysis & Modeling syllabus. Whether you need to review specific subjects or assess your overall readiness, EduRev has you covered. The questions are designed to challenge you and help you gain confidence in tackling the actual exam. Maximize your chances of success by utilizing EduRev's extensive collection of Dimensional Analysis & Modeling resources.

Dimensional Analysis & Modeling MCQs with Answers

Prepare for the Dimensional Analysis & Modeling within the Mechanical Engineering exam with comprehensive MCQs and answers at EduRev. Our platform offers a wide range of practice papers, question papers, and mock tests to familiarize you with the exam pattern and syllabus. Access the best books, study materials, and notes curated by toppers to enhance your preparation. Stay updated with the exam date and receive expert preparation tips and paper analysis. Visit EduRev's official website today and access a wealth of videos and coaching resources to excel in your exam.

Online Tests for Dimensional Analysis & Modeling Fluid Mechanics for Mechanical Engineering

Practice with a wide array of question papers that follow the exam pattern and syllabus. Our platform offers a user-friendly interface, allowing you to track your progress and identify areas for improvement. Access detailed solutions and explanations for each test to enhance your understanding of concepts. With EduRev's Online Tests, you can build confidence, boost your performance, and ace Dimensional Analysis & Modeling with ease. Join thousands of successful students who have benefited from our trusted online resources.
© EduRev
Education Revolution
Follow Us
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup