Question 1

Which of the following is NOT true regarding a dry clutch system?

Accepted Answer

High speed, brushless AC motors are used in wet clutch systems, not dry clutch systems.

Question 2

Technician A says that there are two output shafts in a dual clutch transmission. Technician B says that there is a center main shaft that is actually both input shafts. Who is correct?

Accepted Answer

In a dual clutch transmission, there are indeed two output shafts, and the center main shaft functions as both input shafts, one for each clutch.

Question 3

Technician A says that the 6DCT250 transmission moves the shift forks through a set of gears and machined cams via a cable. Technician B says that a special cam gear prevents two gears from being engaged at the same time. Who is correct?

Accepted Answer

Technician B is correct because a special cam gear is used to prevent two gears from being engaged simultaneously in a dual-clutch transmission like the 6DCT250. Technician A's description does not accurately describe the operation of the 6DCT250 transmission.

Question 4

Technician A says that when a transmission is in first gear, the first input shaft (or the hollow shaft) is connected to the engine. Technician B says that when the transmission is in second gear, the first input shaft (or the hollow shaft) is connected to the engine. Who is correct?

Accepted Answer

When the transmission is in first gear, the first input shaft (or the hollow shaft) is connected to the engine.

Question 5

Technician A says that a dual clutch transmission has improved fuel economy. Technician B says that the dual clutches are each connected to a separate input shaft that drives its own set of gears. Who is correct?

Accepted Answer

Dual clutch transmissions can improve fuel economy by allowing for faster and more efficient gear changes. Additionally, they use two clutches connected to separate input shafts, each driving its own set of gears, allowing for seamless gear transitions.

Question 6

Technician A says that a wet clutch is not hydraulically actuated. Technician B says that a dry clutch contains two single disc clutches for use in high torque applications. Who is correct?

Accepted Answer

A wet clutch is typically hydraulically actuated, and a dry clutch does not necessarily contain two single disc clutches for high torque applications.

Question 7

Which of the following statements regarding a dry clutch system is NOT true?

Accepted Answer

A dry clutch system typically does not provide smooth shifts compared to a wet clutch system, which is designed to offer smoother operation due to the lubrication provided by the oil.

Question 8

The dual clutch system contains a set of damper springs. Technician A says that these springs help reduce shift shock as the clutch is applied. Technician B says that the springs help absorb engine pulses while driving the vehicle. Who is correct?

Accepted Answer

Both technicians are correct. The damper springs in a dual clutch system help reduce shift shock by smoothing out the engagement of the clutch (Technician A) and also help absorb engine pulses to provide a smoother driving experience (Technician B).

Question 9

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?

Accepted Answer

Dual-clutch transmissions use two clutches, either wet or dry, to connect the engine to the transmission, allowing for faster and more efficient gear changes compared to a standard torque converter.

Question 10

Which of the following terms is used to identify clutches that are designed to operate immersed in hydraulic oil or transmission fluid?

Accepted Answer

Wet clutches are designed to operate immersed in hydraulic oil or transmission fluid, which helps in cooling and reducing friction.

Question 11

What type of clutches are used to hold or drive individual members of the planetary set in an automatic transmission?

Accepted Answer

Multi-disc wet clutches are commonly used in automatic transmissions to hold or drive individual members of the planetary gear set due to their ability to handle high torque and dissipate heat effectively.

Question 12

Which of the following statements is true with respect to a dry clutch?

Accepted Answer

The answer of Which of the following statements is true...

Question 13

Which of the following statements is true with respect to a wet clutch?

Accepted Answer

Wet clutches are typically actuated hydraulically, as the hydraulic fluid also serves as a cooling and lubricating medium for the clutch plates.

Question 14

A __________ contains two sets of single disc clutches, similar to a traditional manual transmission clutch disc.

Accepted Answer

The answer of A __________ contains two sets of single...

Question 15

A customer has a concern that their new vehicle, equipped with a dry-type dual clutch, shifts rough. Which of these is most likely the cause?

Accepted Answer

Dry-type dual clutch transmissions often have a different feel compared to traditional automatic transmissions, and what the customer perceives as rough shifting may be normal for this type of transmission.

Question 16

Technician A says that the high-performance models are typically equipped with a paddle-shifted dry clutch system to handle the high torque produced by the engine. Technician B says that a wet-type clutch is the type of clutch system with a hydraulic system. Who is correct?

Accepted Answer

The answer of Technician A says that the high-performance models...

Question 17

Technician A says that a dry clutch is lighter weight and is used for more fuel efficiency. Technician B says that a dry clutch has a hydraulic system that controls operation and adds weight to the system. Who is correct?

Accepted Answer

Technician A is correct because a dry clutch is typically lighter and can contribute to better fuel efficiency. Technician B is incorrect because a dry clutch does not inherently have a hydraulic system; that is more characteristic of a wet clutch system.

Question 18

Technician A says that dual clutch systems contain a set of damper springs to absorb engine pulses while the vehicle is driving. Technician B says that the damper springs help reduce damaging shift shock as the clutch is applied. Who is correct?

Accepted Answer

Both technicians are correct. Damper springs in dual clutch systems help absorb engine pulses and reduce shift shock.

Quiz 20: Dual Clutch Transmissions