Test: Flywheels - 1 - Mechanical Engineering MCQ

The flywheel reduces the fluctuation of speed during a cycle for constant output load.

The flywheel controls the mean speed of the prime mover.

The flywheel adjusts supply when output is varying.

The flywheel is no influence over cyclic speed fluctuations. 

181.5 rpm

180.5 rpm

178.5 rpm

179.5 rpm

Iω (ω₁ - ω₂)

Iω₂K

2KE

All of these

6210 Nm

6250 Nm

6310 Nm

6430 Nm

The coefficient of fluctuation of speed remains same with any change in the mean speed of the prime mover.

The maximum fluctuation of energy of a flywheel is directly proportional to coefficient of fluctuation of speed.

For the same fluctuation of energy, the size of the flywheel is reduced at higher mean speed of rotation.

For the same mass of flywheel, the rim type and disc type flywheels are equally preferable

1,3 and 4

2, 3 and 4

1,2 and 3

1,2 and 4

Punching machine

Lathe

Revetting machine

Steam engine

N₁ + N₂

N₁ - N₂

mean speed of the engine .

mean torque developed by the engine

cyclic fluctuations of speed when delivering constant output

variation of load demand on the engine

Turning-moment-diagram is graphical representation of turning moment or crank effort for various positions of the crank.

The area of turning -moment-diagram represents the work done.

The variation of energy above and below the mean resisting torque line is called fluctuation of energy.

The coefficient of fluctuation of energy is defined as the ratio of work done per cycle to the maximum fluctuation of energy.