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Mechanical Engineering Exam  >  Mechanical Engineering Tests  >  Test: Flywheels - 2 - Mechanical Engineering MCQ

Test: Flywheels - 2 - Mechanical Engineering MCQ


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10 Questions MCQ Test - Test: Flywheels - 2

Test: Flywheels - 2 for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Test: Flywheels - 2 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Flywheels - 2 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Flywheels - 2 below.
Solutions of Test: Flywheels - 2 questions in English are available as part of our course for Mechanical Engineering & Test: Flywheels - 2 solutions in Hindi 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: Flywheels - 2 | 10 questions in 30 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study for Mechanical Engineering Exam | Download free PDF with solutions
Test: Flywheels - 2 - Question 1
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In the case of a flywheel of mass moment of inertia 'I’ rotating at an angular velocity ‘ω’ the expression 1/2 lω2 represents the

Detailed Solution for Test: Flywheels - 2 - Question 1

Kinetic energy stored in the flywheel is 
K.E. = 1/2Iω2

Test: Flywheels - 2 - Question 2
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In which one of the following is a flywheel generally employed

Detailed Solution for Test: Flywheels - 2 - Question 2

The flywheel stored energy in the form of inertia. The flywheel is used where the operation is intermittent such an punching machine, riveting machine etc.

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Test: Flywheels - 2 - Question 3
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In case of flywheel, the maximum fluctuation of energy is the

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Maximum fluctuation of energy

Test: Flywheels - 2 - Question 4
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The maximum fluctuation of energy during a cycle for a flywheel is
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Test: Flywheels - 2 - Question 5
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The amount of energy absorbed by a flywheel is determined from the
Detailed Solution for Test: Flywheels - 2 - Question 5

The amount of energy absorbed by a flywheel is determined form the torque-crank angle diagram. The area under torque-crank angle diagram is known as turning moment.

Test: Flywheels - 2 - Question 6
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Why is the mass of flywheel concentrated in the rim?
Detailed Solution for Test: Flywheels - 2 - Question 6

Flywheel stores energy in the form of inertia and its interia will be more for heavy mass at its periphery. This is the reason mass of flywheel is concentrated in the rim.

Test: Flywheels - 2 - Question 7
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The safe rim velocity of a flywheel is influenced by the
Detailed Solution for Test: Flywheels - 2 - Question 7

Rim velocity 
where
σ = centrifugal stress of circumferential stress
ρ = density of rim materia!
Hence, rim velocity is the function of centrifugal stress and density of rim material.

Test: Flywheels - 2 - Question 8
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The crank-effort diagram of an engine running a machine is showing the areas above and below the mean line (in joules). What is the maximum fluctuation of energy in the below diagram?
Detailed Solution for Test: Flywheels - 2 - Question 8



Maximum energy = E + 50 
Minimum energy = E
Maximum fluctuation of energy
= E + 50 - E = 50J

Test: Flywheels - 2 - Question 9
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For a certain engine having an average speed of 1200 rpm, a flywheel approximated as a solid disc, is required for keeping the fluctuation of speed within 2% about the average speed. The fluctuation of kinetic energy per cycle is found to be 2 kJ. What is the least possible mass of the flywheel if its diameter is not to exceed 1 m?
Detailed Solution for Test: Flywheels - 2 - Question 9

Average speed

we know that

Test: Flywheels - 2 - Question 10
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Which of the following statement is correct?
Detailed Solution for Test: Flywheels - 2 - Question 10

Flywheel is used to control the variations in speed during each cycle of an engine. While the function of a governor is to maintain the speed of an engine within specified limit whenever, there is a variation of load.

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