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JSSC JE (ME) :QUIZ-4 || Flywheels

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Question 1

A circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is closest to ?

Question 2

Coefficient of fluctuation of energy for the flywheel is given by

Question 3

For the same indicated work per cycle, mean speed and permissible fluctuation of speed, what is the size of flywheel required for a multi-cylinder engine in comparison to a single-cylinder engine?

Question 4

In a flywheel, the safe stress is

and the density is

Then what is the maximum peripheral velocity

Question 5

A flywheel connected to a punching machine has a mean angular speed 10 rad/s. if total fluctuation of speed is not to exceed ±1 % and the mass moment of inertia is 50 kg-m². The energy supplied by the flywheel __________.

Question 6

As the no. of cylinder increases in the engine, the coefficient of fluctuation of energy

Question 7

If the coefficient of fluctuation of speed is 0.5 then the coefficient of steadiness is

Question 8

The amount of energy absorbed by a fly wheel is determined from the

Question 9

If the speed of the engine varies between 390rpm and 410 rpm in a cycle of operation, the coefficient fluctuation of speed will be

Question 10

Introduction of the flywheel in a rotating system smoothens

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AE & JE Exams Mechanical Engineering

May 30AE & JE Exams