Flywheels and Governors Design Questions - ObjectiveBooks

Flywheels and Governors Design Questions

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.
    (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

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