Previous Year GATE Questions on Flywheel

Solved Gate Questions on Flywheel

Question 1. Which of the following statement is correct?

(A) Flywheel reduces speed fluctuations during a cycle for a constant load, but flywheel does not control the mean speed of the engine if the load changes

(B) Flywheel does not reduce speed fluctuations during a cycle for a constant load, but flywheel does control the mean speed of the engine if the load changes.

(C) Governor controls speed fluctuations during a cycle for a constant load, but governor does not control the mean speed of the engine if the load changes.

(D) Governor controls speed fluctuations during a cycle for a constant load, and governor also controls the mean speed of the engine if the load changes.

GATE-ME-2001

Hint

Question 2. For a certain engine having an average speed of 1200 rpm, a flywheel approximated as a solid disc, is requires 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?

(A) 40 kg

(B) 51 kg

(C) 62 kg

(D) 73 kg

GATE-ME-2003

Hint

Question 3. A rotating disc of 1m diameter has two eccentric masses of 0.5 kg each at radii of 50 mm and 60 mm at angular positions of  respectively. A balancing mass of 0.1 kg is to be used to balance the rotor. What is the radial position of the balancing mass?

(A) 50 mm

(B) 120 mm

(C) 150 mm

(D) 280 mm

GATE-ME-2005

Hint

Question 4. If  is the coefficient of speed fluctuation of a flywheel then the ratio of  will be:

(A) 

(B) 

(C) 

(D) 

GATE-ME-2006

Hint

Question 5. The speed of an engine varies from 210 rad/s to 190 rad/s. During a cycle the change in kinetic energy is found to be 400 Nm. The inertia of the flywheel in  is

(A) 0.10

(B) 0.20

(C) 0.30

(D) 0.40

GATE-ME-2007

Hint

Question 6. A circular solid 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

(A) 395

(B) 790

(C) 1580

(D) 3160

GATE-ME-2007

Hint

Question 7. A flywheel connected to a punching machine has to supply energy of 400 Nm while running at a mean angular speed of 20 rad/s. If the total fluctuation of speed is not exceed to , the mass moment of inertia of the flywheel in  is

(A) 25

(B) 50

(C) 100

(D)125

GATE-ME-2013

Hint

Answer Keys