Gears MCQ

31. The gears are termed as medium velocity gears, if their peripheral veocity is

  1. 1-3 m/sec
  2. 3-5 m/sec
  3. 15-30 m/sec
  4. 30-50 m/sec
Answer. b

32. In case of spur gears, the portion of path of contact from the pitch point to the end of the engagement of a pair of teeth is called as

  1. Arc of recess
  2. Arc of contact
  3. Arc of approach
  4. Arc of departure
Answer. a

33. Which term defines the surface below the pitch surface of the gear tooth?

  1. Face of tooth
  2. Flank of tooth
  3. Profile
  4. Pitch circle
Answer. b

34. Efficiency in a normal spur gear pair will be

  1. above 98%
  2. upto 80%
  3. less then 50%
  4. less tean 30%
Answer. a

35. Which of the following curve is obtained traced by a point on the circumference of a circle which rolls without slipping on a fixed straight line.

  1. Pitch circle
  2. Addendum circle
  3. Cycloidal
  4. Involute
Answer. c

36. Which of the following gear system have minimum axial thrust?

  1. Helical gears
  2. Double helical gears
  3. Spur gears
  4. Bevel gears
Answer. b

37. Which of the following toothed wheels do not come under the classification according to the position of teeth on the gear surfaces?

  1. Straight
  2. Inclined
  3. Curved
  4. Non-intersecting and non-parallel
Answer. d

38. The differential gear in the automobiles is used to

  1. assist in changing speed
  2. provide balancing
  3. reduce speed
  4. help in turning
Answer. d

39. The radius that connects the root circle to the profile of the tooth is known as

  1. arc of approach
  2. fillet radius
  3. profile
  4. pitch radius
Answer. b

40. In gear drive, addendum equals

  1. diametral pitch
  2. circular pitch
  3. module of the gear
  4. 1.57 times the module of the gear
Answer. c
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