The amount of energy absorbed by a flywheel is determined from the ______.

Question

Question

This question was previously asked in

JKSSB JE Mechanical 02 Nov 2021 Shift 1 Official Paper

Answer 1

Concept:

The turning moment diagram (also known as the crank-effort diagram) is the graphical representation of the turning moment or crank-effort for various positions of the crank. It is plotted on cartesian coordinates, in which the turning moment is taken as the ordinate and the crank angle as abscissa.
A flywheel used in machines serves as a reservoir, which stores energy during the period when the supply of energy is more than the requirement and releases it during the period when the requirement of energy is more than the supply.

Let a1, a3, and a5 be the areas in work units of the portions above the mean torque ab of the turning-moment diagram. These areas represent quantities of energies added to the flywheel.
Similarly, area a2, a4, and a6 below ab represent quantities of energies taken from the flywheel.
So with the help of the torque crank angle diagram, we can get energy added and taken from the flywheel but according to the given question, we have to choose only one.