
Millwright Mechanics - 2nd Year: Gearing Fundamentals
Exams
1. False: True or false. A herringbone gear with a diametral pitch of 20 should have
at least 0.005 inch backlash.
2. 1. Open gear drive
2. Enclosed gear drives: What are the two types of gear drives?
3. Gears that are exposed to the outside environment: What is an open gear
drive?
4. Thick oil or grease: What is typically used to lubricate an open gear drive?
5. Gears contained in a gearbox with a lubrication supply: What are enclosed
gear drives?
6. oil, grease: Enclosed gear drives can be lubricated with or
.
7. Matched pairs of gears manufactured together and intended to mate with
each other: What are gear sets?
8. made in sets: Hypoid and bevel gears are usually .
9. When two or more gears mesh or work together as a unit.: What is a gear
train?
10. The gear with fewer teeth between two gears that have different numbers
of teeth mesh: What is a pinion?
11. drive: The pinion is generally the gear.
12. The larger circular gear of a bevel and hypoid gear set with the teeth
pointing upwards around the ring when the gear lays flat.: What is a crown gear
(ring gear)?
13. The input gear of the gear train causing the mating gear to turn.: What is
the power in drive gear?
14. The output gear of the gear train that the the drive gear forces to turn: What
is the power out driven gear?
15. When the input speed of the gearbox is the same as the output speed: What
is direct drive?
16. A gear train with a slower output speed than the input speed: What is a
speed reducer?
17. A gear train wiht a faster output speed than the input speed: What is a speed
increaser?
18. the ratio of the force produced by a machine to the force applied to it, used
in assessing the performance of a machine: What is mechanical advantage?
19. Using a speed reducer increases torque: How is mechanical advantage in-
creased in a gear train?
20. mechanical advantage: The larger the driven gear is compared to the drive
gear, the greater the .