Home

The rotating shafts tend to vibrate violently at whirling speeds because

A. The system is unbalanced

B. Bearing centre line coincides with the axis

C. The shafts are rotating at very high speeds

D. Resonance is caused due to the heavy mass of the rotor

Correct Answer : D.


Download Objective type questions of Theory of Machines PDF

Visit our PDF store

Get all objective type questions of Theory of Machines MCQ

Also checkout these categories

Advanced Surveying MCQ Asp Programming MCQ Physical Measurement MCQ Chemical Bonding and Molecular Structure MCQ Mycoplasma and Bacteria MCQ Analogy MCQ s-Block Element MCQ Kinetic Theory of Gases MCQ Coding MCQ Java Programming MCQ Fact MCQ General Science MCQ

Please do not use chat terms. Example: avoid using "grt" instead of "great".

Submit
Load More..
You can do it
  1. Which of the following is a lower pair?
  2. For an involute gear, the ratio of base circle radius and pitch circle radius is equal to
  3. Which of the following is an inversion of a double slider crank chain?
  4. The magnitude of linear velocity of a point B on a link AB relative to point A is (Where ω = Angular…
  5. For a kinematic chain to be considered as mechanism
  6. The Scott-Russell mechanism consists of
  7. The radial distance of a tooth from the pitch circle to the bottom of the tooth is called
  8. The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given…
  9. The Coriolis component of acceleration acts
  10. The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω…
  11. A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure,…
  12. Whirling speed of the shaft is the speed at which
  13. The number of links in pantograph mechanism is equal to
  14. When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the…
  15. A Porter governor is a
  16. In a steam engine, the earlier cut-off with a simple slide valve may be obtained by increasing the steam…
  17. A spring controlled governor is said to be unstable when the controlling force
  18. The contact ratio is given by
  19. The direction of Coriolis component of acceleration is the direction
  20. The acceleration of a particle at any instant has two components i.e. radial component and tangential…
  21. The maximum value of the pressure angle in case of cam is kept as
  22. Lower pairs are those which have
  23. In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without…
  24. When the axes of the first and last wheels are coaxial, then the train is known as
  25. The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r₁…
  26. The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m).(dx/dt)…
  27. The Klein's method of construction for reciprocating engine mechanism
  28. The method of direct and reverse cranks is used in engines for
  29. At the nodal point in a shaft, the amplitude for torsional vibration will be
  30. In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is Constant, then