Gears

Question 1

A wheel with teeth is a:

Answer 1

Gear

Question 2

Gear devices can tranmit at:

Answer 2

Different speeds
Different torques or
Indifferent directions

Question 3

What are the 4 functions gears have?

Answer 3

1. To change the direction of movement
2. To change the type of movement
3. To change the direction of rotation
4. To decrease speed to obtain an increase in force

Question 4

When a large driver gear drives a small driven gear, the driven gear rotates faster than the driver gear.

Answer 4

This is gearing up and speed is increased and force is decreased

Question 5

When a small driver gear drives a large driven gear, the driven gear rotates slower than the drive gear.

Answer 5

This is gearing down and speed is decreased and force is increased

Question 6

The purpose of this gear is to change the direction of the driven gear.

Answer 6

Idler gear

Question 7

This gear is moved by the driver.

Answer 7

Driven gear

Question 8

This gear rotates in opposite directions with a driven gear

Answer 8

Driver gear

Question 9

Name the types of gears

Answer 9

Spur gears
Bevel gears
Rack and pinion gears
Worm gears

Question 10

Name two characteristics of a worm gear

Answer 10

It always drives the worm wheel
It always drives faster than the wheel

Question 11

This gear changes the direction of movement 90°

Answer 11

Worm gear

Question 12

This gear is used to obtain a large increase in force by means of a large decrease in speed.

Answer 12

Worm gear

Question 13

How does a rack and pinion work?

Answer 13

This system of gears work in two ways
•When a pinion turns, it makes the rack move in a straight line
•Pushing or pulling the rack makes the pinion turn

Question 14

What is a rack?

Answer 14

It’s a flat gear whose teeth mesh with the pinion gear

Question 15

A round gear is a:

Answer 15

Pinion

Question 16

Name 5 uses of a bevel gear

Answer 16

1. In train engines
2. In motor cars
3. Steel plants
4. Power plants
5. Cooling towers
6. Printing presses

Question 17

This gear is shaped like a cone

Answer 17

Bevel gear

Question 18

This gear have straight teeth and the shaft that they are attached to are parallel to each other

Answer 18

Spur gear

Question 19

State if true or false
The driven gear provides the input movement and the driver gear gives the output movement

Answer 19

False.
The driver gear provides the input movement and the driven gear gives the output movement.

Question 20

This gear has no change in speed or force.

Answer 20

Bevel gear