GEAR RATIOS

Making a _________________change is one of the easiest ways to change mechanical advantage in a mechanism or system to achieve the desired speed and/or torque.

• gear teeth

• Gear Ratio

• drastic

• position

What do we call the gear connected to the input power source, such as a motor?

• Driven Gear

• Bigger Gear

• Smaller Gear

• Driving Gear

What do we call the gear connected to the output, such as a wheel or mechanism in a system?

• Driving Gear

• Driven Gear

• Bigger Gear

• Smaller Gear

When you have a system with a driving gear that is _______ than the driven gear you will increase torque and decrease speed.

• smaller

• bigger

• same size

• thicker

When you have a system with a driving gear that is LARGER than the driven gear you will ___________________

• decrease Speed and decrease Torque

• increase Speed and increase Torque

• increase Speed and decrease Torque

• decrease Speed and increase Torque

Gear ratio is seen as a ratio that is often reduced to simplify the expression. Gear ratio: 40 : 12 gets reduced to

• 20:6

• 80:24

• 10:3

• 30:3

The __________ Gear causes motion

• Driven

• Driving

• Smallest

• Biggest

The rpm (revolutions per minute) or speed of the bigger gear is always ______ than the rpm/speed of the smaller gear.

• slower

• faster

• more

• equal

Gears locked together on the same shaft will always turn in the same _______ and at the same rpm.

• speed

• torque

• direction

• momentum

What is the Gear Ratio of a driven gear with 8 teeth and a driving gear with 32 teeth? Hint: GR=DRIVEN/DRIVING

• 4

• 1/4

• 0.4