Deck 8: Gears and Shafts

Question 1

Planet gears are also known as pinion gears.

Answer 1

True

Question 2

Technician A says the sun gear always rotates in the opposite direction to the rotation of the pinion gears. Technician B says the pinions will always follow the same direction as the ring gear when the ring gear and carrier pinions are free to rotate at the same time. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Answer 2

C

Question 3

Overdrive occurs when the sun gear is the driving member of the gear set.

Answer 3

False

Question 4

The sun gear has its teeth on the outer surface.

Question 5

The transfer case is usually mounted to the side or rear of the transmission.

Question 6

A faulty output shaft will produce vibrations with a change in engine speed.

Question 7

A key difference in a Lepelletier gear set design is that two clutches are applied at the same time.

Question 8

Chain deflection is often referred to as chain slack.

Question 9

The output gear rotates in the same direction as the input gear when an external gear drives another external gear.

Question 10

Thrust load is a load placed in parallel with the center of an axis.

Question 11

Technician A says the torque the differential assembly receives from the transmission is multiplied by the ring-and-pinion gear in the differential. Technician B says the purpose of the differential is to allow for equal wheel speed while the vehicle is rounding a corner. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 12

Technician A says gear ratio expresses the size difference of two gears by stating the ratio of the driven gear to the drive gear. Technician B says the mathematical relationship, according to the number of teeth, of one gear to another is expressed in gear ratios. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 13

Thrust washers are often referred to as thrust plates.

Question 14

The planet pinion is the bracket in a planetary gear set on which the planet carrier is mounted.

Question 15

Output torque and output speed is decreased when a large gear drives a small gear.

Question 16

Technician A says to multiply torque, gears are used. Technician B says to apply torque to other rotating parts of the drivetrain, gears are used. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 17

Neutral gear results when the input into a planetary gear set is holding a member.

Question 18

Technician A says output torque is decreased and output speed is increased when a large gear drives a smaller gear. Technician B says output torque is increased and output speed is decreased when a small gear drives a larger gear. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 19

Thrust washers are included in a transmission or transaxle overhaul kit.

Question 20

The planet gears are in constant mesh with the sun and ring gears.

Question 21

Technician A says the output of the gear set will be in the opposite direction to the input, which produces reverse gear when the planetary carrier is held. Technician B says the gearset produces a gear reduction when the planetary carrier is the input member. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 22

Technician A says the check ball in a shaft must be seated in the correct direction. Technician B says some shafts are hollow with internal bushings to support another shaft. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 23

Technician A says when an external gear drives another external gear, the output gear will rotate in the opposite direction to the input gear. Technician B says when an external gear drives another external gear, the output gear will rotate in the same direction as the input gear. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 24

Technician A says that a compound planetary gear set is comprised of two gear sets that share a common member. Technician B says that some transmissions use a simple planetary gear set added to a compound gear set to gain additional gear ratios. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 25

Technician A says chassis or white lube is suitable for holding thrust washers and bearings in place during reassembly of the transmission. Technician B says when a planetary gear set with blacken gear shafts should be replaced as an unit. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 26

Technician A says when an external gear is in mesh with an internal gear, the two gears will rotate in the same direction. Technician B says there will be a torque increase when an external gear drives and is in mesh with an internal gear. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 27

Technician A says when the planet carrier is the driving member of the gear set and the sun gear is held, overdrive occurs. Technician B says if any two of the planetary gear set members receive torque in the same direction at the same speed, the third member is forced to turn with the other two and direct drive is the result. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 28

Technician A says a faulty output shaft can cause vibrations. Technician B says an unbalanced torque converter can cause vibrations. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 29

Technician A says in order to provide additional gear ratios, most transmissions are equipped with more that one planetary gear set. Technician B says that from a single planetary gear set, five forward gear combinations are possible, although some of these combinations are seldom used. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 30

When an external gear is in mesh with an internal gear, both gears will rotate in which direction?

A)In opposite directions
B)In the same direction
C)Independent of each other
D)In none of the above directions

Question 31

Technician A says gear reduction is accomplished by holding the sun gear and applying torque to the ring gear. Technician B says gear reduction can also occur if the ring gear is held and the sun gear is the input gear. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 32

Technician A says only one gear reduction forward gear can be provided by a single planetary gear set. Technician B says only one reverse gear can be provided by a single planetary gear set. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 33

Technician A says etching is a discoloration or removal of some material caused by corrosion or some other chemical reaction. Technician B says thrust washers should be replaced with new ones if they are pitted or scored. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 34

Technician A says the sun gear in a planetary gear set is the central gear. Technician B says planet gears are in constant mesh with the sun and ring gears. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 35

​Technician A says sprag and roller clutches should be inspected in the same way as bearings. Technician B says to check their operation by attempting to rotate them in both directions. If working properly, they will allow rotation in both directions. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 36

In the Simpson gear train with the planet carrier as the output, the carrier will always:

A)Rotate in the same direction as the input gear.
B)Rotate in the opposite direction of the input.
C)Rotate in the same direction as the sun gear.
D)Rotate in the same direction as the ring gear.

Question 37

Technician A says when the planet carrier is the input, the output gear member always moves in the opposite direction to the planet carrier. Technician B says when the planet carrier is the output, the planet carrier always follows the direction of the input member. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 38

Technician A says when an internal gear drives and is in mesh with an external gear, there will be a speed increase. Technician B says when an external gear drives another external gear, the output gear will rotate in the opposite direction to the input gear. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 39

Technician A says the input shaft of the transmission connects the output shaft of the TC to the driving members inside the transmission. Technician B says the output shaft connects the driven member of the gear sets to the final drive gear set. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 40

When the planetary carrier is held, the gear set produces which of the following conditions?

A)Neutral
B)Gear reduction
C)Overdrive
D)Reverse gear

Question 41

The ____________________ is the outer gear of a planetary gear set.

Question 42

​Technician A says the differential case is located between the side gears. Technician B says the differential case is mounted on bearings so that it is able to rotate independently of the drive axles. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 43

Explain the advantages of a Ravigneaux gear train over a Simpson gear train.

Question 44

____________________ is another name for a ring gear.

Question 45

Describe the neutral position of a planetary gear set.

Question 46

Technician A says that the Lepelletier gear set design limits the number of gear ratios; therefore, this type of transmission is limited to four forward speeds. Technician B says that this gear set design makes the transmission heavier and more bulky than the other designs. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 47

The following components are located in the hybrid transaxle assembly, the ____________________ assembly, a(n)____________________ unit, the two ____________________, a(n)____________________, and a(n)____________________.

Question 48

​Technician A says Technician A says the Simpson geartrain is an arrangement of a common planetary gearset with two sun gears, two ring gears, and two planetary pinion carriers. Technician B says a Simpson geartrain is the most commonly used compound planetary gearset to provide five reduction gears. Who is correct?

A)​A only
B)​B only
C)​Both A and B
D)​Neither A nor B

Question 49

Describe what produces overdrive in a planetary gear set.

Question 50

The ____________________ rotates between the ring and sun gear.

Question 51

Describe the purpose of bearings fitted to a shaft or gear.

Question 52

Define the result of a large gear driving a smaller gear.

Question 53

While discussing the transmission housing and/or case, Technician A says when removing parts from inside the case, pay close attention to the location of the check balls that may be in the hydraulic system. Technician B says that the case passages can be checked using high-pressure compressed air to determine leaks and cracks. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 54

Explain how reverse gear is obtained in a planetary gear set.

Question 55

Describe the result of a small gear driving a large gear.

Question 56

The ____________________ holds or drives members of the planetary gear set.

Question 57

Define a differential and its purpose.

Question 58

Describe two ways gear reduction is accomplished in a planetary gear set.

Question 59

​The _______________ geartrain is an arrangement of two separate planetary gearsets with a common sun gear, two ring gears, and two planetary pinion carriers.

Question 60

List the reasons that a transmission housing/case will need to be replaced.

Question 61

What are the four common configurations used as final drive units?