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Speed, Torque, and Gear Ratios

Total questions: 24

Worksheet time: 27mins

Name
Class
Date
1.
When speed increases, what happens to the value of torque?
a)
increases
b)
decreases
c)
stays constant
2.
When speed decreases, what happens to the value of torque?
a)
increases
b)
decreases
c)
stays constant
3.
When speed is constant, what happens to the value of torque?
a)
increases
b)
decreases
c)
stays constant
4.

Looking at the picture, what is the gear ratio?

Choose the best answer.

a)

6:1

b)
1:6
c)

24:4

d)

4:24

5.

Looking at the picture, what is the gear ratio?
Choose the best answer.

a)

10:6

b)

5:3

c)

6:10

d)
3:5
6.

Looking at the picture, what is the gear ratio?
Choose the best answer.

a)
4:6
b)
6:4
c)
2:3
d)
3:2
7.

A gear ratio can be calculated using which of these?

a)

tooth count from each gear

b)

speed driven gear

c)

torque of driven gear

8.
When gears are equal in size, what happens to the speed and torque?
a)
Speed increases; torques decreases
b)
Speed decreases; torque increases
c)
Speed and torque are constant
9.
When gears are equal in size, what is the gear ratio?
a)
1:2
b)
1:3
c)
2:5
d)
1:1
10.

If power remains constant, what happens to speed and torque in a gear system?

a)

Speed decreases; torque increases

b)

Speed decreases; torque decreases

c)

Speed increases; torque decreases

d)

Speed increases; torque increases

11.
When on a bike going uphill, what happens to the speed and torque?
a)
Speed decreases; torques increases
b)
Speed decreases; torques decreases
c)
Speed increases; torques decreases
d)
Speed increases; torques increases
12.
When on a bike going downhill, what happens to the speed and torque?
a)

Speed decreases; torque increases

b)

Speed decreases; torque decreases

c)

Speed increases; torque decreases

d)

Speed increases; torque increases

13.

True or false; When power is constant, both speed and torque can increase at the same time.

a)
true
b)
false
c)
not enough information
14.

If the small gear is driving the large gear, which of these has increased on the bigger gear?

a)

Torque

b)

Speed

c)

Nothing

d)

Need more information

15.
Which kind of movement is depicted in the picture?
a)
Rotary
b)
Linear
c)
Oscillating
d)
Reciprocating
16.
Which kind of movement is depicted in the picture?
a)
Oscillating
b)
Rotary
c)
Reciprocating
d)
Linear
17.
A force in a circular direction
a)

rotation

b)

torque

c)

speed

d)

gravity

18.
The gear train in which diagram provides more torque?
a)
A
b)
B
19.
Which gear train would you use to ride up a hill?
a)
A
b)
B
20.
What is the gear ratio of these meshed gears if the input gear has 36 teeth?
a)
36:60
b)
60:36
c)
3:5
d)
5:3
21.

Which of these situations require a system designed for high torque?

a)

Racing down a hill

b)

Moving 100 tennis balls a minute

c)

Pushing other things around

d)

Accelerating quickly

22.

Which gear ratio will produce higher torque?

a)

100:1

b)

1:100

c)

1:50

d)

200:50

23.

Which gear ratio will produce higher speeds?

a)

100:1

b)

1:100

c)

1:50

d)

200:50

24.
What is the function of the smaller gear?
a)
Makes the output gear turn slower
b)
Makes the output gear turn faster
c)
Makes the larger gears turn in opposite directions.
d)
Makes the larger gears turn in the same direction.