# Multiple Choice Questions (MCQ) on Flywheel

1. The radius of gyration of a solid disc type flywheel of diameter ‘D’ is

a. D                  b. D/2               c. D/√2             d. (√3/2)D

2. With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by

a. 2ECS             b. ECS/2                        c. 2ECS2                        d. 2E2CS

(Ans:a)

3. Turning moment diagram is a graph between

a. Torque and Crank angle             b. Torque and crank radius

c. Force and crank radius              d. none of the above

(Ans: a)

4. Mean resisting torque in Turning Moment diagram is given by

a. Work done per cycle/Angle turned during the cycle

b. Work done per cycle x Angle during the cycle

c. Work done per revolution /Angle during the cycle

d. None of the above

(Ans: a)

5. The energy is stored in Flywheel in form of

a. Potential energy    b. Kinetic energy      c. Heat energy         d. Electrical energy

(Ans: b)

6. The radius of Gyration (k) for Rim Type Flywheel having radius ‘r’ is given by

a. k = 2r       b. k=r/2        c. k=r           d. k=r/3

(Ans: c)

7. The coefficient of fluctuation of speed of Flywheel is given by

a. (N1-N2)/N            b. (N1+N2)/N           c. (N1-N2) x N          b. (N1+N2) x N

Where N1 =Maximum speed, N2 = Minimum speed, N = Mean speed.

(Ans: a)

8. The Coefficient of fluctuation of energy of flywheel is given as

a. (Emax – Emin)/Work done per cycle                    b. (Emax + Emin)/Work done per cycle

c. (Emax – Emin) x Work done per cycle                  d. (Emax + Emin) x Work done per cycle

Where Emax = Maximum Kinetic energy of the Flywheel.

Emin = Minimum Kinetic energy of the Flywheel

(Ans: a)