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Planetary Gear Basics

Total questions: 16

Worksheet time: 8mins

Name
Class
Date
1.

Which gear is not part of a planetary gear set?

a)

Hypoid gear

b)

Ring gear

c)

Sun Gear

d)

Carrier gear

2.

Which planetary gear has pinion gears that are often called "The Planets"?

a)

Sun Gear

b)

Carrier gear

c)

Ring gear

d)

Annulus gear

3.

If the sun gear is turning Clockwise (CW) what direction will the planet pinions turn?

a)

Clockwise (CW)

b)

Counter Clockwise (CCW)

c)

They won't turn at all and instead they will rotate as an assembly.

d)

They will thrust to the right

4.

If the planet pinions are turning clockwise the ring gear will also turn clockwise.

a)

True

b)

False

5.

Within a simple planetary gear set, in order to have a driven output there must be: (Choose all Correct answers)

a)

A drive input

b)

A reaction member

c)

A clutch pack

d)

An accumulator

6.

Which gear in the planetary gear set is considered the largest gear?

a)

Sun gear

b)

Ring gear

c)

Annulus gear

d)

Carrier gear

7.

If the sun gear is the drive gear turning CW, and the carrier is the reaction gear, Which direction will the ring gear turn?

a)

CW

b)

CCW

c)

Lateral.

d)

Front to back

8.

If the ring gear is the drive gear turning CW, and the sun gear is the reaction gear, torque on the driven gear will:

a)

Increased

b)

Decrease

c)

Stay the same

9.

If the ring gear is the drive gear turning CW, and the sun gear is the reaction gear. The driven gear will:

a)

Be the carrier gear turning CW

b)

Be the carrier gear turning CCW

c)

Be the pinion gears turning CCW

d)

Be in overdrive

10.

When torque on the driven gear increases, the rotational speed on the driven gear:

a)

Increases

b)

Decreases

c)

Stays the same

11.

When the carrier gear and the sun gear are both drive input gears: (Multiple Answers)

a)

The gear ratio is 1:1

b)

The reaction gear is the ring gear

c)

The ring gear is the driven gear

d)

The gear set is in overdrive

e)

The gear set is in direct drive

12.

If the sun gear is the drive gear turning CW and the ring gear is reactionary, the planet pinion gears will be turning:

a)

CW (clockwise)

b)

CCW (counter clockwise)

c)

Not on their own but as an entire assembly with the carrier gear

13.

Which gear in the planetary gear set is considered the smallest gear?

a)

Sun gear

b)

Ring gear

c)

Annulus gear

d)

Carrier gear

14.

Which gear in the planetary gear set is considered the medium size gear?

a)

Sun gear

b)

Ring gear

c)

Annulus gear

d)

Carrier gear

15.

When the sun gear is driving the ring gear (carrier is reactionary): (Choose all that apply)

a)

Torque goes up and speed goes down on the ring gear

b)

Torque goes down and speed goes up on the ring gear

c)

The gears are in overdrive

d)

The gears are in underdrive

e)

The gears are in direct drive

16.

Reaction gears that vary in rotational speed will cause an output gear ratio that will also vary.

a)

True

b)

False