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Gear box is used

A. To produce torque

B. For speed reduction

C. To obtain variable speeds

D. To increase efficiency of system

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  1. In second type of levers,
  2. The elasticity is the property of a material which enables it to
  3. The bending moment M and a torque T is applied on a solid circular shaft. If the maximum bending stress…
  4. In designing a connecting rod, it is considered like __________ for buckling about X-axis.
  5. In nitrated parts, the origins of the fatigue cracks will occur at
  6. The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given…
  7. The designation M 33 × 2 of a bolt means
  8. Which of the following statement is correct?
  9. Which of the following statement is correct regarding power screws?
  10. In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing
  11. In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.
  12. Which process will increase the fatigue duration of parts?
  13. The connecting rod bolts are tightened up with initial tension greater than the external load so that
  14. The static tooth load should be __________ the dynamic load.
  15. The strength of a riveted joint is equal to
  16. A bench vice has following type of threads
  17. The cross-section of the arm of a bell crank lever is
  18. If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations…
  19. The function of cutting oil when threading a pipe is to
  20. The value of Lewis form factor used in design of gears is
  21. The metal suitable for bearings subjected to heavy loads is
  22. A tube has the following advantage over pipe
  23. Yield point in fatigue loading as compared to static loading is
  24. Allen bolts are
  25. The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive)…
  26. The face of the tooth is the
  27. The ratio of endurance limit in shear to the endurance limit in flexure is
  28. For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient…
  29. Set screws are
  30. In a multiple V-belt drive, if one of the belts break, then