Which of the following statement is wrong?

A. A key is used as a temporary fastening

B. A key is subjected to tensile stresses

C. A key is always inserted parallel to the axis of the shaft

D. A key prevents relative motion between the shaft and boss of the pulley

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

You can do it
  1. In a flange coupling, the bolts are subjected to
  2. When an open coiled helical compression spring is subjected to an axial compressive load, the stress…
  3. The power transmitted by the belt drive can be increased by
  4. Screws used for power transmission should have
  5. When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order…
  6. The value of stress concentration factor depends upon
  7. The shear stress in a beam varies from zero at the outer fibres to a maximum at the________.
  8. The velocity factor for ordinary cut gears operating at velocities upto 12.5 m/s is equal to
  9. Which is correct statement? Stress concentration in static loading is
  10. The flank of the tooth is the
  11. The maximum normal stress theory is used for
  12. The efficiency of a riveted joint is equal to
  13. A locking device extensively used in marine type connecting rod ends is a
  14. The property of a bearing material which has the ability to accomodate shaft deflections and bearing…
  15. The number of slots in a 25 mm castle nut is
  16. Eye bolts are used for
  17. The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is
  18. The material generally used for aircraft components is
  19. The application of third type levers is found in
  20. The property of a material which enables it to be drawn into wires with the application of a tensile…
  21. The fatigue life of a part can be improved by
  22. According to Rankine's theory, the failure occurs at a point in a member
  23. For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be
  24. Which of the following statement is correct?
  25. In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then…
  26. Wahl's stress factor __________ very rapidly as the spring index decreases.
  27. In cross or regular lay ropes
  28. Tapered roller bearings can take
  29. The objective of caulking in a riveted joint is to make the joint
  30. The size of a cam depends upon