Flywheels MCQ Practice Test
1. The maximum fluctuation of energy of flywheel is,
- (A) Difference
between maximum and minimum kinetic energy during the cycle
- (B) Difference
between maximum and mean kinetic energy during the cycle
- (C) Difference
between mean and minimum kinetic energy during the cycle
- (D) Mean
of maximum and minimum kinetic energy during the cycle
2. For finding out the bending moment for the arm (spoke) of flywheel, the arm is assumed as,
- (A) A
cantilever beam fixed at the rim and subjected to tangential force at the hub
- (B) A
simply supported beam fixed at hub and rim and carrying uniformly distributed
load
- (C) A
cantilever beam fixed at the hub and subjected to tangential force at the rim
- (D) A
fixed beam fixed at hub and rim and carrying uniformly distributed load
3. The maximum fluctuation of speed of flywheel is,
- (A) Difference
between maximum and minimum speeds during the cycle
- (B) Difference
between maximum and mean speeds during the cycle
- (C) Difference
between mean and minimum speeds during the cycle
- (D) Mean
of maximum and minimum speeds during the cycle
4. The coefficient of fluctuation of speed of flywheel is given by,
- (A) (ωmax
- ωmin)/ω
- (B) 2 (ωmax - ωmin)/
(ωmax + ωmin)
- (C) 2 (nmax - nmin)/
(nmax + nmin)
- (D) Any
one of the above
5. A flywheel is used,
- (A) To
store and release energy when required during the work cycle
- (B) To
reduce the power capacity of electric motor
- (C) To
reduce the amplitude of speed fluctuations
- (D) Any
one of above functions
6. The coefficient of fluctuation of energy of flywheel is,
- (A) Ratio
of maximum fluctuation of energy to work done per cycle
- (B) Ratio
of to work done per cycle to maximum fluctuation of energy
- (C) Difference
between maximum and minimum kinetic energy during the cycle
- (D) Ratio
of maximum and minimum kinetic energy during the cycle
7. The cross-section of the flywheel arm is,
- (A) I section
- (B) Rectangular
- (C) Elliptical
- (D) Circular
8. The rim of the flywheel is subjected to,
- (A) Direct
tensile stress and bending stress
- (B) Torsional
shear stress and bending stress
- (C) Direct
shear stress and bending stress
- (D) Compressive
stress and bending stress
9. The spokes of the flywheel are subjected to,
- (A) Direct
shear stress
- (B) Torsional
shear stress
- (C) Tensile
stress
- (D) Compressive
stress
10. The coefficient of fluctuation of speed of flywheel is,
- (A) Ratio
of maximum and minimum speeds during the cycle
- (B) Ratio
of maximum fluctuation of speed to the mean speed
- (C) Ratio
of mean speed to maximum fluctuation of speed during the cycle
- (D) Sum
of maximum fluctuation of speed and the mean speed
11. The hub diameter of the flywheel is taken as,
- (A) 2.5 (shaft
diameter)
- (B) 1.5 (shaft
diameter)
- (C) 4 (shaft
diameter)
- (D) 2 (shaft
diameter)
12. The tensile stress in the rim of the flywheel is given by,
Where, ρ is mass density and v is linear velocity at the mean radius of the rim.
13. A flywheel is used,
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- (A) ρv2/2
- (B) πρv2
- (C) ρv2
- (D) 2
ρv2
13. A flywheel is used,
- (A) To
limit the fluctuations of speed during each cycle
- (B) To
control the mean speed of the engine
- (C) To
maintain a constant speed
- (D) To
come into action when the speed varies