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Which is positive drive?

A. Flat belt drive

B. V-belt drive

C. Crossed belt drive

D. Timing belt

Correct Answer : D.


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  1. Set screws are
  2. A spring is used to
  3. Stress concentration in static loading is more serious in
  4. When a helical compression spring is cut into halves, the stiffness of the resulting spring will be
  5. The function of a washer is to
  6. For circumferential joint in boilers, the type of joint used is
  7. The maximum efficiency of a square threaded screw is
  8. The gears are termed as medium velocity gears, if their peripheral velocity is
  9. Which of the following statement is wrong?
  10. Wahl's stress factor __________ very rapidly as the spring index decreases.
  11. The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T₁, and…
  12. When compared to the rod of the same diameter and material, a wire rope
  13. When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of…
  14. Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating…
  15. In a horizontal flat belt drive, it is customary to use
  16. A steel containing 0.8% carbon is known as
  17. Whether any core is required in wire ropes
  18. A self locking screw has
  19. The temperature at which the new grains are formed in the metal is known as
  20. A chain drive transmits __________ power as compared to belt drive.
  21. The draw of cotter need not exceed
  22. The pitch diameter is the __________ diameter of an external or internal screw thread.
  23. In unilateral system of tolerance, the tolerance is allowed on
  24. Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d…
  25. In testing a material for endurance strength, it is subjected to
  26. The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard…
  27. According to Indian standards, total numbers of tolerance grades are
  28. If the centre distance of the mating gears having involute teeth is varied within limits, the velocity…
  29. The expansion joint is mostly used for pipes which carry steam at __________ pressures.
  30. Tensile strength of a mild steel specimen can be roughly predicted from following hardness test