Exploring Gear Ratios and Their Effects

What is a gear ratio?

• The ratio of the diameter of the gears

• The ratio of the number of teeth on two meshing gears

• The ratio of the speed of the input gear to the output gear

• The ratio of the torque of the input gear to the output gear

If a driving gear has 20 teeth and a driven gear has 40 teeth, what is the gear ratio?

• 1:2

• 2:1

• 1:1

• 1:4

How does increasing the gear ratio affect the speed of the output gear?

• Increases the speed

• Decreases the speed

• Does not affect the speed

• Reverses the direction of speed

How does increasing the gear ratio affect the torque of the output gear?

• Increases the torque

• Decreases the torque

• Does not affect the torque

• Reverses the direction of torque

Calculate the gear ratio if the input gear has 15 teeth and the output gear has 45 teeth.

• 1:3

• 3:1

• 1:2

• 2:1

Which of the following best describes the effect of a high gear ratio in a bicycle?

• Easier to pedal, less speed

• Harder to pedal, more speed

• Easier to pedal, more speed

• Harder to pedal, less speed

If a gear system has a gear ratio of 4:1, what does this imply about the input and output gears?

• The input gear rotates four times for every one rotation of the output gear

• The output gear rotates four times for every one rotation of the input gear

• Both gears rotate at the same speed

• The input gear has four times the torque of the output gear

What is the effect of a low gear ratio on a vehicle's acceleration?

• Increases acceleration

• Decreases acceleration

• No effect on acceleration

• Reverses the direction of acceleration

If a gear system has an input speed of 100 rpm and a gear ratio of 5:1, what is the output speed?

• 500 rpm

• 100 rpm

• 20 rpm

• 50 rpm

In a gear train, if the input torque is 10 Nm and the gear ratio is 1:4, what is the output torque?

• 2.5 Nm

• 40 Nm

• 10 Nm

• 4 Nm