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Gear ratio practice

Total questions: 21

Worksheet time: 3hrs 36mins

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.
A gear ratio is defined as which of the following?
a)
Teeth of gear : teeth of gear
b)
gear shape : gear shape
c)
Speed : torque
5.
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.
6.

When a input gear is larger than a output gear you have.....

a)

Increased Speed

b)

Increased Torque

7.

What is the mechanical advantage of this gear ratio?

a)

1: 3 Torque Advantage

b)

1: 3 Speed Advantage

c)

no Mechanical Advantage

8.

What is the mechanical advantage of 1:5 gear ratio?

a)

Torque Advantage

b)

Speed Advantage

c)

no Mechanical Advantage

9.

If the small gear is input gear, what is happening to the torque?

a)

Increase

b)

Decrease

c)

Remains constant

d)

Not enough information

10.

# of teeth input gear = 60

# of teeth output gear = 36

What is the gear ratio (in lowest terms)?

a)

36:60

b)

60:36

c)

3:5

d)

5:3

11.

# of teeth input gear = 24

# of teeth output gear = 4

What is the gear ratio (in lowest terms)?

a)

4:24

b)

1:6

c)

2:12

d)

1:9

12.

# of teeth input gear = 10

# of teeth output gear = 6

What is the gear ratio (in lowest terms)?

a)

6:10

b)

3:10

c)

10:6

d)

3:5

13.
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
14.
Which gear train would you use to ride up a hill?
a)
A
b)
B
15.

# of teeth input gear = 6

# of teeth output gear = 48

What is the gear ratio (in lowest terms)?

a)

1:8

b)

8:1

c)

6:48

16.

What is the best explanation for a gear train with a 7:1 gear ratio?

a)

The input gear turns 1 time for every 7 turns of the output gear.

b)

The input gear turns 7 times for 1 turn of the output gear.

17.

# of teeth input gear = 30

# of teeth output gear = 60

What is the gear ratio (in lowest terms)?

a)

1:2

b)

3:2

c)

2:1

d)

2:5

18.

# of teeth input gear = 25

# of teeth output gear = 75

What is the gear ratio (in lowest terms)?

a)

3:1

b)

2:1

c)

3:4

19.

# of teeth input gear = 20

# of teeth output gear = 80

What is the gear ratio (in lowest terms)?

a)

40:10

b)

20:5

c)

4:1

20.

If the pink gear is the input gear and the blue gear is the output gear, what will happen with speed and torque?

a)

increase speed, decrease torque

b)

decrease speed, increase torque

c)

speed & torque remain constant

21.

Which of the following pics shows a simple gear train that will turn the gears at a constant speed/torque?

a)
b)
c)