Vehicle Dynamics Mid - II, November - 2014

1.When a two degree freedom system is vibrating with the second natural frequency, the ratio of the amplitude of two masses is
  • Equal to +1
  • Equal to -1
  • Greater than +1
  • Less than -1
Answer: B
2.If a system is subjected to a suddenly applied non-periodic force, the response will be
  • Periodic
  • Transient
  • Steady
  • Unsteady
Answer: B
3.Dynamic vibration absorber is suitable for _____________
  • Constant speed machines
  • Varying speed machines
  • Zero speed range machines
  • None of the above
Answer: A
4.The angle between the tire plane and the vertical plane is called
  • Tire Plane angle
  • Side Slip angle
  • Camber angle
  • Velocity Vector
Answer: C
5.A vibration beam has ___________ degrees of freedom
  • Single
  • two
  • three
  • multi
Answer: D
6.Which of the following method is used to find all the Eigen values and Eigen Vectors simultaneously?
  • Rayleigh’s Method
  • Holzer’s method
  • Matrix Iteration method
  • Jacobi’s method
Answer: D
7.HOLZER’s method is _____________________
  • Extract method
  • Trial and error method
  • Approximate method
  • None
Answer: B
8.Vulcanization is the process of __________________
  • Controlling a volcano
  • Controlling the pressure of tyre
  • Converting natural rubber into a harder and more durable material
  • Increasing the strength of tube
Answer: C
9.If a spring –mass dashpot system is subjected to excitation by constant harmonic force then at resonance, its amplitude of vibrations will be
  • Infinity
  • inversely proportional to damping
  • directly proportional to damping
  • decreases exponentially with time
Answer: A
10.For a fixed-fixed beam the total uniformly distributed mass can be shown to be replaced by ____ % of its mass to act at the centre
  • 50
  • 37.2
  • 23.2
  • 100
Answer: B
11.The principal mode is said to be normal mode of vibration if the amplitude for one of the masses is taken as ________________
Answer: Unity
12.The inertia coupling is also known as ______________
Answer: Dynamic Coupling
13.Dunkereley’s method is most suited for determination of _____________________
Answer: Natural Frequency of Structures
14.The method used to find the Eigen values and Eigen vectors one at a time is _______________
Answer: Matrix Iteration Method
15.Flexibility matrix is the inverse of ______________ matrix.
Answer: Stiffness
16.An automobile is simulated by the simplified 2-DOF system. The first mode of the system is a representation for _______________
Answer: Vertical Translation
17.SAE stands for______________________
Answer: Society of Automotive Engineers
18.Two masses both ‘m’ are fixed on a tightly stretched string, such that masses at one third points on the string. The second natural frequency is______________________
Answer: √3T/ml
19.What are the independent coordinates an automobile if pitch and bounce motions, _____________ and_______________
Answer: Angular and linear
20._______________ type of damper used in an automobile
Answer: Viscous