Gears, Pulley Drives, Sprockets Review

What is the gear ratio of the following gears?

• 4:8

• 1:2

• 2:1

• 8:4

What is the gear ratio of the following gear train?

• 8:6

• 4:3

• 10:4

• 5:2

What is the output torque?

• 5.83 ft-lbs

• 17.14 ft-lbs

• 4.17 ft-lbs

• 24 ft-lbs

What is the total gear ratio?

• 3:2

• 2:3

• 0.1:1

• 3:1

What is the total gear ratio?

• 2:1

• 1:2

• 5:6

• 6:5

A speed of 1,000 rpm is required when the drive belt is connected to pulley B. What is the diameter of pulley B?

• 4 in

• 0.8 in

• 1.25 in

• 5 in

A garage door operates with a continuous loop of chain over a fixed 10-tooth sprocket that is attached to a live axle shaft. A second 10-tooth sprocket is attached to the live axle shaft and uses a chain connected to a 40-tooth sprocket that is attached to a drum that drives the door. What is the system gear ratio?

• 4:1

• 10:4

• 40:1

• 1:4