Deck 6: Automatic Transmission Fundamentals

Question 1

All of the following statements with respect to automatic transmission are true except:

A) The transmission has the ability to select and shift gears without input from the driver.
B) The transmission can automatically couple and uncouple from the engine when needed.
C) The transmission will automatically upshift and downshift in response to engine speed and load.
D) Automatic transmissions are not widely used because they are an expensive option.

Answer 1

D

Question 2

A torque converter does all of the following except:

A) enables the transmission to automatically couple and uncouple from the engine when needed.
B) allows the engine to idle at a stop even though the transmission is still in gear.
C) multiplies torque from the engine to the input shaft of the transmission under certain driving conditions.
D) transmits lower amounts of torque as engine speed increases.

Answer 2

D

Question 3

All of the following statements with respect to the principles of operation of automatic transmissions are true except:

A) A planetary gear set is a device with several gears assembled in a compact design.
B) Planetary gears are held together in a sun gear.
C) If an individual component of a planetary gear set is prevented from turning, it will create one of three gear ratios.
D) By combining two or more planetary gear sets, we can create the needed gear ratios, or speeds.

Answer 3

B

Question 4

Any gear ratio of less than 1:1 is considered an overdrive ratio. Overdrive ratios are typically used to:

A) increase engine speed.
B) increase fuel economy.
C) decrease engine noise.
D) decrease engine wear.

Question 5

Any gear ratio of less than 1:1 is considered:
​

A) gear reduction.
B) direct drive.
C) overdrive.
D) indirect drive.

Question 6

Planetary gears are held in place by a:

A) sun gear.
B) ring gear.
C) planet carrier.
D) clutch.

Question 7

Tech A says that the higher the numerical gear ratio (4:1), the more torque will be applied to the wheels. Tech B says that the lower the numerical gear ratio (2:1), the more speed can be obtained at the wheels. Who is correct?

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

Question 8

Tech A says that vehicles with smaller engines require less gear ratios to operate efficiently. Tech B says that manufacturers have been adding more gear ratios in a quest for better fuel economy. Who is correct?

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

Question 9

Tech A says that most automatic transmissions use planetary gear sets. Tech B says that planetary gear sets are often combined together to create the needed gear ratios for a transmission. Who is correct?

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

Question 10

Which of these transmissions uses two, either wet or dry, clutches in place of a standard torque converter to connect the engine to the transmission?

A) Continuously variable transmissions
B) Power-splitting transmission
C) Dual-clutch transmissions
D) Dual-shaft transmissions

Question 11

Which of these are often used to change the direction of power flow 90 degrees?

A) Hypoid gears
B) Helical cut gears
C) Spur gear
D) Bands

Question 12

Tech A says that spur gears create more thrust motion than helical gears. Tech B says that helical cut gears are noisier than straight-cut gears. Who is correct?

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

Question 13

Tech A says that a parallel hybrid drivetrain has two or more different devices to propel the vehicle. Tech B says that power-splitting transmissions use two adjustable pulleys and a heavy metal belt. Who is correct?

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

Question 14

Tech A says that dual-clutch transmissions are more like a manual transmission internally. Tech B says that the driver needs to operate the clutches on a dual-clutch transmission. Who is correct?

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

Question 15

Tech A says that a transaxle assembly includes the transmission and final drive mechanism. Tech B says that transaxles are used for front wheel drive vehicles. Who is correct?

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

Question 16

Which of these converts the hydraulic pressure acting on a piston to a mechanical force that is then applied to a brake band?

A) Seals
B) Springs
C) Servos
D) Pinions

Question 17

Tech A says that multidisc clutches are used to drive or hold planetary gear components. Tech B says that bands are used to drive planetary gear components. Who is correct?

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

Question 18

Tech A says that bands allow components to freewheel in one direction, and lock up in the other direction. Tech B says that sprags are stronger than one-way rollers. Who is correct?

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

Question 19

Tech A says that dog clutches are used on most automatic transmissions. Tech B says that all transmissions utilize helical cut gears. Who is correct?

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

Question 20

Apply devices, such as clutches and brakes, either drive or stop members in a planetary gear set in order to create the needed gear ratio.

Question 21

The input shaft is attached to the planetary gear set by one or more clutches, depending on what gear the transmission is in.

Question 22

Which of the following is specifically used to hold one member of the planetary gear set stationary?

Question 23

Which of the following parts is designed to hold a component when it is trying to turn in one direction and allow it to turn freely in the other direction?

A) One-way clutches
B) Multi-disc clutches
C) Bands
D) Both A and C

Question 24

Technician A says a multi-disc clutch is an application device in an automatic transmission. Technician B says a one-way roller or sprag is an application device in an automatic transmission. Who is correct?

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

Question 25

Technician A says multi-disc clutches and bands are mechanically controlled. Technician B says one-way clutches and sprags are hydraulically controlled. Who is correct?

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

Question 26

Two technicians are discussing automatic transmission clutches. Technician A says one-way clutches prevents components from turning in either direction. Technician B says that one purpose of a multi-disc clutch is to hold one rotating member to another rotating member. Who is correct?

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

Question 27

When a gear is selected in an automatic transmission, the input shaft becomes locked to the output shaft of the transmission through which of the following?

A) Bands
B) Gears
C) Clutches
D) All of the answers listed

Question 28

Technician A says a multi-disc clutch is a holding/application device in an automatic transmission. Technician B says a one-way roller or sprag is a device that typically drives another component in an automatic transmission. Who is correct?

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

Question 29

Which of the following is NOT a holding device used in an automatic transmission?

A) Band
B) Dog clutches
C) Multidisc clutches
D) 3-way roller clutch

Question 30

Which type of automatic transmission use multi-plate clutches and bands applied by hydraulic pressure?

A) Hydraulic transmissions
B) Electronic transmissions
C) Both A and B
D) Neither A nor B

Question 31

Although none of the automobile manufacturers in the United States are still producing fully hydraulically controlled transmissions, it is still important for automotive technicians to understand how these transmissions operate.

Question 32

Automatic transmissions are designed to prevent a downshift if that downshift would cause the engine to exceed the safe maximum RPM.

Question 33

Which of the following pressures is not used in reverse, because there is only one speed available?

A) Governor pressure
B) Modulator pressure
C) Throttle valve pressure
D) All of the above

Question 34

Reverse requires greater clutch and brake holding force, so the manual valve will direct additional fluid to work with the pressure regulator valve spring, increasing line pressure.

Question 35

As the engine throttle valve is opened, the transmission throttle valve moves to block the throttle pressure port and open the exhaust port, reducing throttle pressure.

Question 36

Today, the majority of vehicles sold in North America are equipped with automatic transmissions as standard equipment.

Question 37

The transmission needs to be able to adapt the engine torque to meet the _________ demands of the vehicle.

A) Speed and power
B) Fluids and gear ratio
C) Rotation and stability
D) All of the above

Question 38

What is the purpose of a vehicle's transmission?

A) To drive the engines accessories
B) To transmit engine torque to the drive wheels
C) To drive the fluid coupler
D) To stall the engine

Question 39

Given the number of automatic transmission vehicles being produced, it is valuable for all technicians to have a working knowledge of automatic transmission fundamentals, even if they may never rebuild a transmission while working in the automotive field.

Question 40

When an engine is operating under light load, engine manifold pressure is high.

Question 41

When the engine is operating under heavy load, engine manifold pressure is low.

Question 42

Torque multiplication within a torque converter is automatically adjusted, within design limits, by the difference in speed between the impeller and turbine.

Question 43

Which of the following describes torque multiplication in a torque converter?

A) Increases with turbine speed
B) Is maximum at converter stall
C) Decreases with impeller speed
D) Both A and B

Question 44

As the vehicle begins to move from a stop, torque multiplication is minimal because there is a large difference between the speed of the impeller and the turbine.

Question 45

The transmission needs to be able to adapt the engine torque to meet the _________ demands of the vehicle.

A) Speed and power
B) Fluids and gear ratio
C) Rotation and stability
D) All of the above

Question 46

When turbine speed reaches around 90% of impeller speed, what is the torque multiplication in the torque converter?

A) 1:01
B) 2:01
C) 1:02
D) 3:01

Question 47

A(n) ________ is a device with several gears assembled in a compact design.

A) planetary gear set
B) band
C) overdrive
D) servo

Question 48

Tech A states that most automatic transmissions use pneumatic pressure to apply individual clutches and bands. Tech B states that most automatic transmissions use hydraulic pressure to apply individual clutches and bands. Who is correct?

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

Question 49

Which of the following gear ratio will be created when an individual component of a planetary gear set is prevented from turning?

A) Forward torque reduction with a speed increase
B) Forward speed reduction with a torque increase
C) Reverse
D) All of the above

Question 50

Technician A says that a transaxle must have a type of differential assembly to allow the front wheels to turn at different speeds while driving around a curve. Technician B says that a conventional rear-wheel drive vehicle will typically use a differential assembly that is located in the rear axle assembly. Who is correct?

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

Question 51

Today, the majority of vehicles sold in North America are equipped with automatic transmissions as standard equipment.

Question 52

Given the number of automatic transmission vehicles being produced, it is valuable for all technicians to have a working knowledge of automatic transmission fundamentals, even if they may never rebuild a transmission while working in the automotive field.

Question 53

Without the ability to automatically connect and disconnect the transmission from the engine, a vehicle would stall when it came to a stop, much like a manual transmission vehicle will do if the driver forgets to depress the clutch pedal.

Question 54

Which of the following describes the operation of the hydraulic control system and gear train in an automatic transmission?

A) Selecting and shifting gear ratios to match road speed and engine load without driver input
B) Selecting the vehicle direction without driver input
C) Automatically coupling and uncoupling the transmission from the engine as necessary
D) Parallel parking the vehicle without driver input

Question 55

The transmission can automatically couple and uncouple from the engine when needed, much like a clutch on a manual transmission vehicle.

Question 56

Which of the following is NOT a function that separates an automatic transmission from a manual transmission?

A) Automatic transmissions can select gears without an input from the driver.
B) Automatic transmissions can automatically couple and uncouple from an engine when needed without any work from the driver.
C) Both A and B.
D) None of the above.

Question 57

Without the ability to connect and disconnect from an engine, the vehicle would stall when it came to a stop.

Question 58

Technician A says there are two major differences between an automatic and manual transmission. Technician B says that due to the number of vehicles with automatic transmissions installed, it is important for a technician to have knowledge of automatic transmission fundamentals. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 59

An automatic transmission is generally defined as a transmission that will automatically upshift and downshift in response to engine speed and load.

Question 60

Technician A says that a transaxle must have a type of differential assembly to allow the front wheels to turn at different speeds while driving around a curve. Technician B says that a conventional rear-wheel drive vehicle will typically use a differential assembly that is located in the rear axle assembly. Who is correct?

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

Question 61

Which of the following describes the operation of the hydraulic control system and gear train in an automatic transmission?

A) Selecting and shifting gear ratios to match road speed and engine load without driver input
B) Selecting the vehicle direction without driver input
C) Automatically coupling and uncoupling the transmission from the engine as necessary
D) Parallel parking the vehicle without driver input

Question 62

Which of the following transmission designs uses multidisc clutch packs replace to synchronizer assemblies, which would be in a manual transmission, to lock the individual gears onto the main shaft?

A) Continuously variable
B) Conventional automatic
C) Dual-clutch
D) Dual-shaft

Question 63

Which type of automatic transmission use multi-plate clutches and bands applied by hydraulic pressure?

A) Hydraulic transmissions
B) Electronic transmissions
C) Both A and B
D) Neither A nor B

Question 64

Which of the following parts is designed to hold a component when it is trying to turn in one direction and allow it to turn freely in the other direction?

A) One-way clutches
B) Multi-disc clutches
C) Bands
D) Both A and C

Question 65

All of the following statements with respect to automatic transmission are true except:

A) The transmission has the ability to select and shift gears without input from the driver.
B) The transmission can automatically couple and uncouple from the engine when needed.
C) The transmission will automatically upshift and downshift in response to engine speed and load.
D) Automatic transmissions are not widely used because they are an expensive option.

Question 66

A torque converter does all of the following except:

A) enables the transmission to automatically couple and uncouple from the engine when needed.
B) allows the engine to idle at a stop even though the transmission is still in gear.
C) multiplies torque from the engine to the input shaft of the transmission under certain driving conditions.
D) transmits lower amounts of torque as engine speed increases.

Question 67

All of the following statements with respect to the principles of operation of automatic transmissions are true except:

A) A planetary gear set is a device with several gears assembled in a compact design.
B) Planetary gears are held together in a sun gear.
C) If an individual component of a planetary gear set is prevented from turning, it will create one of three gear ratios.
D) By combining two or more planetary gear sets, we can create the needed gear ratios, or speeds.

Question 68

Any gear ratio of less than 1:1 is considered an overdrive ratio. Overdrive ratios are typically used to:

A) increase engine speed.
B) increase fuel economy.
C) decrease engine noise.
D) decrease engine wear.

Question 69

Any gear ratio of less than 1:1 is considered:

A) gear reduction.
B) direct drive.
C) overdrive.
D) indirect drive.

Question 70

Planetary gears are held in place by a:

A) sun gear.
B) ring gear.
C) planet carrier.
D) clutch.

Question 71

Tech A says that the higher the numerical gear ratio (4:1), the more torque will be applied to the wheels. Tech B says that the lower the numerical gear ratio (2:1), the more speed can be obtained at the wheels. Who is correct?

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

Question 72

Tech A says that vehicles with smaller engines require less gear ratios to operate efficiently. Tech B says that manufacturers have been adding more gear ratios in a quest for better fuel economy. Who is correct?

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

Question 73

Tech A says that most automatic transmissions use planetary gear sets. Tech B says that planetary gear sets are often combined together to create the needed gear ratios for a transmission. Who is correct?

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

Question 74

Which of these transmissions uses two, either wet or dry, clutches in place of a standard torque converter to connect the engine to the transmission?

A) Continuously variable transmissions
B) Power-splitting transmission
C) Dual-clutch transmissions
D) Dual-shaft transmissions

Question 75

Which of these are often used to change the direction of power flow 90 degrees?

A) Hypoid gears
B) Helical cut gears
C) Spur gear
D) Bands

Question 76

Tech A says that spur gears create more thrust motion than helical gears. Tech B says that helical cut gears are noisier than straight-cut gears. Who is correct?

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

Question 77

Tech A says that a parallel hybrid drivetrain has two or more different devices to propel the vehicle. Tech B says that power-splitting transmissions use two adjustable pulleys and a heavy metal belt. Who is correct?

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

Question 78

Tech A says that dual-clutch transmissions are more like a manual transmission internally. Tech B says that the driver needs to operate the clutches on a dual-clutch transmission. Who is correct?

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

Question 79

Tech A says that a transaxle assembly includes the transmission and final drive mechanism. Tech B says that transaxles are used for front wheel drive vehicles. Who is correct?

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

Question 80

Which of these converts the hydraulic pressure acting on a piston to a mechanical force that is then applied to a brake band?

A) Seals
B) Springs
C) Servos
D) Pinions