Question 1

Which of the following is the main advantage of using a dual clutch system in vehicles?

Accepted Answer

Dual clutch systems improve fuel economy by allowing for faster and more efficient gear changes, reducing the time the engine spends in less efficient power bands.

Question 2

Choose the correct statement with respect to the construction and operation of a dual clutch transmission.

Accepted Answer

In a dual clutch transmission, each clutch is connected to a separate input shaft, and each shaft drives its own set of gear ratios. Typically, one clutch handles odd-numbered gears and the other handles even-numbered gears.

Question 3

Tech A states that gears 1, 2, and 3 are on one shaft in a dual clutch transmission and 4, 5, and 6 are on the other shaft. Tech B states that gears 1, 3, and 5 are on one shaft and 2, 4, and 6 are on the opposite shaft. Who is correct?

Accepted Answer

In a dual clutch transmission, odd-numbered gears (1, 3, 5) are typically on one shaft, and even-numbered gears (2, 4, 6) are on the other shaft.

Question 4

Choose the correct statement with respect to the construction of a dry clutch system.

Accepted Answer

Dry clutch systems contain two sets of single-disc clutches.

Question 5

The downside of the dry clutch system is that:

Accepted Answer

The answer of The downside of the dry clutch system...

Question 6

The function of the damper springs is to:

Accepted Answer

Damper springs are used in clutches to absorb engine pulses and vibrations, providing smoother operation.

Question 7

Tech A states that dual clutch transmissions are actually more like a manual transmission than a traditional automatic. Tech B states that rebuilding a dual clutch transmission requires the same tools as rebuilding a manual transmission. Who is correct?

Accepted Answer

Dual clutch transmissions are more similar to manual transmissions in their internal structure and operation, as they use two clutches to engage and disengage gears, unlike traditional automatics that use a torque converter. However, rebuilding them often requires specialized tools not used for manual transmissions.

Question 8

Tech A states that a wet clutch is cooled with antifreeze. Tech B states that a dry clutch does not use hydraulic pressure to apply and release the clutches. Who is correct?

Accepted Answer

Tech B is correct because a dry clutch does not use hydraulic pressure to apply and release the clutches. Tech A is incorrect because a wet clutch is typically cooled with oil, not antifreeze.

Question 9

Tech A states that replacing a clutch on a dual clutch transmission is the same as replacing a clutch on a manual transmission. Tech B states that if transmission fluid leaks onto the clutch disc on a dry clutch system the clutch will slip. Who is correct?

Accepted Answer

Tech B is correct because if transmission fluid leaks onto the clutch disc in a dry clutch system, it can cause the clutch to slip. Tech A is incorrect because replacing a clutch on a dual clutch transmission is more complex than on a manual transmission.

Question 10

Tech A states that each clutch in a dual clutch transmission connects to a different input shaft. Tech B states that dual clutches are both connected to the same input shaft to give greater holding power. Who is correct?

Accepted Answer

In a dual clutch transmission, each clutch is connected to a different input shaft, allowing for seamless gear changes by pre-selecting the next gear.

Question 11

Tech A states that dual clutch transmissions use a traditional flywheel like a manual transmission. Tech B states that dual clutch transmissions use a flexplate like an automatic. Who is correct?

Accepted Answer

The answer of Tech A states that dual clutch transmissions...

Question 12

In a wet clutch system, which of the following directs the flow of hydraulic oil?

Accepted Answer

TCM-controlled solenoids are responsible for directing the flow of hydraulic oil in a wet clutch system by controlling the hydraulic pressure applied to the clutch pack.

Question 13

The function of the blocker ring synchromesh unit is to:

Accepted Answer

The blocker ring synchromesh unit synchronizes the speeds of the gear and the shaft before engagement.

Question 14

Tech A states that on a dual clutch transmission one or more of the synchronizers must be engaged in order for the parking pawl to engage. Tech B states that both clutches are applied to park the vehicle. Who is correct?

Accepted Answer

The answer of Tech A states that on a dual...

Question 15

Which of the following should be done after installing the clutch release bearing assembly into the case?

Accepted Answer

The answer of Which of the following should be done...

Question 16

All of the following statements with respect to replacing the clutch on dry dual clutch transmission are true except:

Accepted Answer

The installation procedure for a new clutch and the reinstallation procedure for an old clutch are not the same, as new clutches may require additional steps or considerations compared to reinstalling an old one.

Question 17

When replacing the motors or the clutch assembly, the computer must be reset to:

Accepted Answer

Resetting the computer enables adaptive learning, allowing the system to recalibrate and optimize the performance of the new components.

Question 18

Tech A states that after replacing a clutch in a dual clutch vehicle the technician should take the vehicle on an extended test drive (a few miles). Tech B states that all adaptives must be performed before test driving the vehicle. Who is correct?

Accepted Answer

Both Tech A and Tech B are correct. After replacing a clutch in a dual clutch vehicle, it is important to perform all necessary adaptive procedures to ensure proper function, and then take the vehicle on an extended test drive to verify the repair.

Question 19

Tech A states that when replacing a dual clutch an entire replacement kit should be purchased that includes necessary seals, actuators, etc. Tech B states that the clutches can be purchased individually so you can replace a single clutch only. Who is correct?

Accepted Answer

Tech A is correct because replacing a dual clutch typically requires a complete kit to ensure all components, including seals and actuators, are properly replaced and function together.

Question 20

Tech A states that it will be necessary to remove the transmission from the vehicle to replace the dual clutch. Tech B states that if the clutch needs to be replaced the entire transmission should be rebuilt. Who is correct?

Accepted Answer

Replacing a dual clutch typically requires removing the transmission from the vehicle, but it does not necessarily mean the entire transmission needs to be rebuilt.

Quiz 20: Dual Clutch Transmissions