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Gear Ratios: Torque & Speed

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.
What is the primary function of torque in a motor?
a)
To determine the speed of the motor
b)
To create a twisting force for rotation
c)
To calculate the distance traveled
d)

To increase friction between the tires and the road

2.
How is horsepower related to torque?
a)
Horsepower measures the speed of the motor only.
b)

Horsepower is the amount of torque needed to stop a moving car

c)
Horsepower is the rate of torque application.
d)

Horsepower is the amount of torque needed to accelerate a car

3.
What is the formula to calculate horsepower?
a)
Horsepower = Torque + RPM
b)
Horsepower = Torque - RPM
c)
Horsepower = Torque x RPM
d)
Horsepower = Torque / RPM
4.

Which statement about gear size and speed is true?

a)

larger gears spin faster becasue they create an optimum gear ratio

b)

larger gears spin faster becasue they are able to generate more leverage

c)

smaller gears spin faster because their smaller radius means less linear distrance to travel

d)

smaller gears spin faster because their lower weight makes it easier to spin them

5.
If a driven gear has 40 teeth and the driver gear has 10 teeth, what is the gear ratio?
a)
1:2
b)
2:1
c)
4:1
d)
1:4
6.

Which arrangement will increase torque?

a)

small driver gear and equal size driven gear

b)

large driver gear and smaller driven gear

c)

small driver gear and larger driven gear

d)

large driver gear and equal size driven gear

7.
What is the significance of gear radius in torque output?
a)
A smaller radius is always better for torque.
b)
A larger radius decreases torque output.
c)
A larger radius increases leverage and torque output.
d)
Gear radius has no effect on torque.
8.

A driven gear is spinning faster than the driver. What's going on here?

a)

the driver gear is smaller

b)

the driver gear is larger

c)

the driven gear has more teeth than the driver

d)

the driver gear has less teeth than the driven

9.

In a manual transmission car, why do lower gears have higher gear ratio?

a)

To save gas

b)

To make sure the wheels spin faster

c)

To make turning easier in low gears

d)

To get the car going and increase acceleration

10.

The increase in torque with larger gears is similar to what simple machine?

a)

Wedge

b)

Lever

c)

Inclined plane

d)

Screw