Design And Technology- Gears

Question 1

Gear

Answer 1

A wheel with cogs (teeth)

Question 2

Gear train

Answer 2

Two or more gears connected (meshed) together

Question 3

Input gear =

Answer 3

Driver gear

Question 4

Output gear =

Answer 4

Driven gear

Question 5

Spur gears

Answer 5

Movement: rotational to opposite rotational

Question 6

Bevel gears

Answer 6

Movement: changes rotational movement 90°

Question 7

Rock and spur gears

Answer 7

Movement: rotational to linear (vice versa)

Question 8

Rack and worm gears

Answer 8

Movement: rotational to linear movement (vice versa)

Question 9

Spur and worm gears

Answer 9

Movement: rotational to linear (vice versa)

Question 10

Control mechanism

Answer 10

Ratchet and Prawl

Question 11

Ratchet and Prawl

Answer 11

Controls gears to turn only one direction

Question 12

Idler gears

Answer 12

Gears between the driver and driven gears

Question 13

Gear ratio (speed)

Answer 13

How many time a driver gear turns in comparison to the driven gear

Question 14

Gearing up

Answer 14

When the driven gear turns faster than driver gear

Question 15

Gearing down

Answer 15

When the driven gear turns slower than the driver gear

Question 16

Speed :

Answer 16

Less cogs= more speed

Question 17

Gear ratio (speed) =

Answer 17

of teeth in the driven gear/ # of teeth on the driver gear

Question 18

Torque:

Answer 18

Bigger gear = more torque

Question 19

Torque (strength)

Answer 19

Strength or force of a gear

Question 20

MA =

Answer 20

Diameter of driven gear/ diameter of driver gear

Question 21

Diameter of driven gear=

Answer 21

MA x diameter of driver gear

Question 22

Diameter of driver gear =

Answer 22

Diameter of driven gear/ MA