Gears, Pulleys, Drives, and Sprockets Quiz

What is the primary function of gears, pulleys, and sprockets?

• To increase electrical power

• To change rotational speed, direction, and torque

• To convert rotational motion to linear motion

• To store mechanical energy

In a gear train, what is the role of an idler gear?

• To increase the gear ratio

• To reduce noise

• To increase speed

• To change the direction of rotation

What must be the same for two mating gears?

• Number of teeth

• Material

• Diameter

• Diametric pitch

How is gear ratio calculated using the number of teeth?

• Number of teeth in divided by number of teeth out

• Sum of teeth in and out

• Number of teeth out divided by number of teeth in

• Difference between teeth in and out

What is the gear ratio if a gear with 40 teeth drives a gear with 20 teeth?

• 1:2

• 2:1

• 1:1

• 4:1

In a compound gear train, what happens to the angular velocity of gears sharing a shaft?

• They stop rotating

• They rotate in opposite directions

• They rotate at the same speed

• They rotate at different speeds

What is a key advantage of using belts over chains?

• Lower cost

• Higher strength

• No lubrication required

• No slippage

Which of the following is a disadvantage of using chains and sprockets?

• They are quieter

• They are more expensive

• They require lubrication

• They are less durable

What happens to the direction of rotation when a belt goes around the exterior of pulleys?

• They rotate in the same direction

• They rotate at different speeds

• They stop rotating

• They rotate in opposite directions

What is the gear ratio if a 6-inch pulley drives a 2-inch pulley?

• 2:1

• 1:2

• 3:1

• 1:3