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WorksheetsGear Ratio Calculations
Total questions: 29
Worksheet time: 29mins
When a gear system increases the speed of the driven gear, what must happen to the value of torque for that system?
When a gear system decreases the speed of the driven gear, what must happen to the value of torque for the driven gear?
When a gear system keeps the speed constant between the driver and driven gears, what must happens to the value of torque?
When a input gear is larger than a output gear you have.....
Increased Speed
Increased Torque
When a multiple gear bike goes up a hill, what should happens to the speed and torque if the gear system is used corretly?
When on a multiple gear bike is going down a hill, what should happens to the speed and torque?
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 output, such as a wheel or mechanism in a system?
Driving Gear
Driven Gear
Bigger Gear
Smaller Gear
Gear reduction is seen as a fraction that is often reduced to simplify the expression. Gear reduction: 40 / 12 gets reduced to
20/6
80/24
10 / 3
30/9
_________have NO EFFECT on Gear Ratio or Gear Reduction, regardless of the number of teeth they have.
Idler Gears
Driven Gears
Driving Gears
Pulleys
All gears in between the driving gear and the driven gear that only transmit power are known as ______
Idler Gears
Trained Gears
Driven Gears
Driving Gears
What is the gear ratio with a driving gear with 40 teeth and a driven gear with 8 teeth?
5
1/5
5/8
8/5
What is the Gear Ratio of a driven gear with 8 teeth and a driving gear with 32 teeth?
4
1/4
0.4
0.25
The input gear has 6 teeth. The output gear has 48 teeth. If the input torque is 10 Newtons*meters then the output Torque will be
1.25 N*m
80 N*m
8 N*m
10 N*m
On the illustration, the number of the gear A teeth are 12 (input), and the number of the gear B teeth (output) are 48. Select one which shows correct gear ratio.
25
0.25
40
4
0.4
# of teeth input gear = 8
# of teeth output gear = 40
What is the gear ratio (in lowest terms)?
5:1
40:8
1:5
8:40
# of teeth input gear = 6
# of teeth output gear = 48
What is the gear ratio (in lowest terms)?
1:8
8:1
6:48
# of teeth input gear = 60
# of teeth output gear = 30
If the input speed is 20 rpm, what is the output speed?
60 rpm
20 rpm
40 rpm
10 rpm
# of teeth input gear = 25
# of teeth output gear = 75
If the input torque is 40 N*m, what is the output torque?
120 N*m
80 N*m
40 N*m
13.3 N*m
# of teeth input gear = 20
# of teeth output gear = 80
What is the Mechanical Advantage for this gear system?
8
0.25
4
If we have a gear ratio of 1:2, there is increased:
speed
torque
no change in speed or torque
Does the Driving Gear or Driven Gear have the motor attached?
The Driving Gear has the motor attached
The Driven Gear has the motor attached
What type of mechanical advantage does this gear system provide?
Torque Advantage
Speed Advantage
no Mechanical Advantage
What is the mechanical advantage of 1:5 or 0.2 gear ratio?
Torque Advantage
Speed Advantage
no Mechanical Advantage
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
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
Gears next to each other spin in
Opposite directions
the same direction
