Deck 37: Clutches

Question 1

When compared to a diaphragm-type pressure plate, a coil spring pressure plate assembly has fewer moving parts.

Answer 1

False

Question 2

There is approximately 10 psi residual pressure in the hydraulic clutch lines when the clutch is in the engaged position.

Answer 2

False

Question 3

Shaft and lever clutch linkage are used on most modern passenger cars.

Answer 3

False

Question 4

Some transaxles have a short, self-centering input shaft that does not require a pilot bushing or bearing.

Question 5

Chatter is caused by liquid contaminants on the friction surfaces.

Question 6

The fluid level in the hydraulic clutch reservoir should be approximately one-fourth inch from the top.

Question 7

Torsional coil springs in the clutch disc ______.

A)absorb the torque forces
B)are the mechanical force holding the pressure plate against the driven disc and flywheel
C)are located between the friction facings
D)All the answers are correct.

Question 8

Most hydraulic clutch release systems should be adjusted once a year.

Question 9

Particles of cotton, brass, rope, and wire are added to prolong the life of the clutch disc and provide torsional strength.

Question 10

Clutch slippage occurs when the clutch disc is not gripped firmly between the flywheel and the pressure plate.

Question 11

When the clutch is fully engaged, the release bearing is normally stationary.

Question 12

Many manufacturers specify replacing the DMF (dual-mass flywheel)as part of clutch replacement.

Question 13

Until recently, asbestos was the material that was molded or woven into facings of the clutch disk.

Question 14

The clutch and the brake system may share the same reservoir.

Question 15

Clutch drag occurs if the clutch disc is not completely released when the clutch pedal is fully depressed.

Question 16

The flywheel should not be resurfaced unless there are hot spots on its surface or the rivets on the clutch disk have made contact with the flywheel surface.

Question 17

Coil spring-type pressure plates require less pedal effort than diaphragm-type pressure plates.

Question 18

Dual-mass flywheels do not require special testing tools to determine their condition.

Question 19

Chatter is a shuddering felt in the vehicle when the pressure plate releases the clutch disc.

Question 20

The clutch friction disc always rotates with the ______.

A)engine crankshaft
B)flywheel
C)pressure plate
D)transmission input shaft

Question 21

Technician A says clutch linkage may be mechanically or hydraulically operated. Technician B says clutch linkage includes shaft and lever linkage and cable linkage designs. 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 engine flywheel is the main driving member of the clutch. Technician B says the transmission input shaft receives driving motion from the pilot bearing. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 23

Which of the following is NOT a spring type used in pressure plate assemblies?

A)Belleville
B)coil
C)diaphragm
D)torsional

Question 24

Technician A says the clutch allows the engine to idle while the vehicle is stopped. Technician B says the clutch is needed for gear shifting. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 25

Technician A says the front of the transmission input shaft may be supported by a pilot bearing. Technician B says on some transaxles the input shaft is not supported by a pilot bearing. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 26

While discussing different types of pressure plate assemblies, Technician A says coil spring types do not require release levers. Technician B says Belleville-type pressure plates are not commonly used because they require excessive space in the bell housing. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 27

The two driving members (inputs)of the clutch assembly are the flywheel and the ______.

A)clutch disk
B)transmission input shaft
C)pilot bearing
D)pressure plate

Question 28

The clutch release bearing exerts pressure upon the ______.

A)clutch disc
B)diaphragm spring
C)pilot bearing
D)torsional springs

Question 29

Technician A says an oil-soaked clutch disc cannot cause clutch chatter. Technician B says clutch chatter cannot be caused by loose bell housing bolts. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 30

The surface of the pressure plate contacts the ______.

A)transmission main shaft
B)throwout bearing
C)clutch disc
D)flywheel

Question 31

When making a clutch adjustment, it is necessary to ______.

A)measure the clutch pedal free travel
B)lubricate the clutch linkage
C)check the hydraulic fluid level
D)place the transmission in reverse

Question 32

When the clutch is disengaged, the power flow stops at the ______.

A)transmission input shaft
B)driven disc hub
C)pressure plate and flywheel
D)torsion springs

Question 33

Technician A says the pressure plate assembly squeezes the clutch disc onto the flywheel. Technician B says the pressure plate moves away from the clutch disc so that the disc can stop rotating. 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 clutch fork moves the pilot bearing. Technician B says the clutch fork movement is controlled by the clutch pedal. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 35

Technician A says the clutch assembly is located between the engine and the transmission. Technician B says the clutch provides a mechanical coupling between the engine flywheel and the transmission input shaft. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 36

Insufficient clutch pedal clearance results in ______.

A)gear clashing when shifting the transmission
B)a noisy front transmission bearing
C)premature release bearing failure
D)premature pilot bearing failure

Question 37

Technician A tests for clutch slippage on a road test. Technician B tests for clutch slippage in the shop by engaging the clutch with the transmission in third gear while the vehicle is stationary. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 38

Which of the following is probably NOT the cause of a vibrating clutch?

A)excessive crankshaft endplay
B)out-of balance pressure plate assembly
C)excessive flywheel runout
D)loose flywheel bolts

Question 39

When the clutch pedal is released on a hydraulic clutch linkage, the ______.

A)master cylinder piston is released by the piston return spring
B)master cylinder piston is released by hydraulic pressure
C)slave cylinder is released by hydraulic pressure
D)slave cylinder piston does not move

Question 40

Which of the following components is NOT part of a clutch disc?

A)torsional damper coil spring
B)cushion (wave)spring
C)Belleville spring
D)hub flange

Question 41

Technician A uses compressed air to clean off asbestos dust from the clutch. Technician B uses an approved liquid cleaning system. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 42

Hydraulic clutch systems are being discussed. Technician A says the clutch master cylinder will normally need about 1 oz. of fluid a year. Technician B says if the master cylinder is less than full, there is probably a leak in the system. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 43

Passenger cars and light trucks are now almost exclusively equipped with _____ spring-type clutches.

A)diaphragm
B)coil
C)torsional
D)eccentric

Question 44

A whirring, grating, or grinding sound that occurs when the clutch pedal is depressed and stops when the pedal is fully released is most likely caused by ______.

A)a failed pilot bearing
B)a failed release bearing
C)worn release levers
D) a bent release fork

Question 45

Internal slave cylinders are being discussed. Technician A says the slave cylinder and the clutch release bearing are a single unit and cannot be serviced separately. Technician B says to replace the slave cylinder, the transmission must be removed. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 46

A technician is replacing a leaking clutch slave cylinder. After removing the cylinder, he takes it apart and finds a swollen cup seal. What should be done?

A)replace the clutch slave cylinder
B)replace the clutch master cylinder
C)flush and bleed the system
D)all answers are correct

Question 47

Which of the following is NOT a function of the flywheel?

A)Provides a mounting surface for the starter ring gear
B)Transfers torque to the transmission input shaft
C)Provides a friction surface for the clutch disk
D)Provides the inertia to rotate the crankshaft through the four strokes

Question 48

The owner of a car complains that the gears grind when shifting into reverse. Technician A says the clutch has excessive freeplay. Technician B says there could be oil on the clutch disk facing. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 49

Which of the following is not a type clutch release linkage?

A)shaft and lever
B)electromechanical
C)cable
D)hydraulic

Question 50

What could cause a clutch pedal pulsation?

A)misaligned bell housing
B)warped flywheel
C)bent or worn release levers
D)All the answers are correct.

Question 51

Technician A says that a leaking clutch master cylinder primary seal will cause fluid to leak onto the clutch pedal and driver's footwell. Technician B says that a leaking clutch master cylinder secondary seal will not show externally but will cause the pedal to be low and spongy. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 52

A mirror-like shine on the pressure plate or a glazed clutch facing that results in chatter could be caused by ______.

A)liquid leaking onto the clutch
B)overheating
C)excessive freeplay
D)A worn release bearing

Question 53

Pilot bearings are being discussed . Technician A says the pilot bearing is located in the flywheel. Technician B says the pilot bearing is located in the crankshaft. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 54

In a self-adjusting-type cable clutch mechanism, the adjusting mechanism is located ______.

A)on top of the clutch pedal
B)inside the bell housing
C)on the engine side of the firewall
D)at the release fork end of the cable

Question 55

The release bearing on a vehicle with a _____ is kept in contact with the release levers of the rotating pressure plate assembly. As a result, the release bearing rotates constantly with the pressure plate.

A)dual-mass flywheel
B)self-adjusting clutch linkage
C)shaft and lever clutch linkage
D)all answers are correct

Question 56

The release bearing slides back and forth on the hollow shaft that is part of the ______.

A)transmission front bearing retainer
B)pilot bearing retainer
C)starter mounting boss
D)transmission breather tube

Question 57

Which statement concerning dual-mass flywheels is false?

A)Dual-mass flywheels are used to reduce vibrations transmitted through the transmission.
B)The rotation of the two flywheel plates can differ by as much as 360 degrees.
C)Dual-mass flywheels are only used on heavy trucks.
D)Dual-mass flywheels provide for smoother shifting, and reduce gear noise.

Question 58

Pilot bearings are being discussed. Technician A says the pilot bearing supports one end of the input shaft. Technician B says the pilot bearing keeps the clutch disc centered in the pressure plate. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 59

Technician A checks the flywheel for runout [warpage] using a dial indicator. Technician B uses a straightedge to check the pressure plate for warpage. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 60

Which of the following is NOT an advantage of a diaphragm-type clutch pressure plate assembly?

A)more compact
B)manually adjustable clamping pressure
C)less weight
D)fewer moving parts to wear out

Question 61

Name three types of clutch linkages.

Question 62

Identify three possible causes of a slipping clutch.

Question 63

The pressure plate moves away from the flywheel when the clutch pedal is ____________________.

Question 64

___________________ linkage is the most commonly used clutch linkage.

Question 65

____________________ can result when the splines in the clutch disc hub or on the transmission input shaft are damaged or when there are problems with the release levers.

Question 66

Many cable-operated clutch release systems have a(n)____________________ mechanism located at the top of the clutch pedal to provide the correct cable to release fork tension.

Question 67

____________________ is another name for the diaphragm spring.

Question 68

Describe how to measure clutch pedal play.

Question 69

A shaking or shuddering that is felt in the vehicle as the clutch is engaged is known as clutch ____________________.

Question 70

____________________ fluid is often used as the hydraulic fluid in hydraulic clutch systems.

Question 71

Describe the procedure for testing clutch dragging.

Question 72

Friction facings are riveted to wave springs that are also called marcel or ____________________ springs.

Question 73

The two types of pressure plate assemblies are those with coil springs and those with a
___________________ spring.

Question 74

Identify three possible causes of a dragging clutch.

Question 75

List three causes of clutch vibrations.

Question 76

What is the function of the release bearing?

Question 77

You should check the pressure plate for ____________________ with a straightedge and feeler gauge.

Question 78

A clutch release bearing is often called a(n)____________________ bearing.

Question 79

What is the difference between chatter, pedal pulsation, and clutch vibration?

Question 80

The bell housing is often called a(n)____________________ housing.