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

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

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

34. Efficiency in a normal spur gear pair will be

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

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

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

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

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

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

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

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