ch 10

1

Many late-model vehicles with 4WD systems have the ability to automatically switch from 2WD to 4WD.

2

AWD constantly provides power to front- and rear-drive axles.

3

Viscous coupling differentials send power to the axle or wheel that has the least traction.

4

During turns, the front wheels travel a shorter distance than the rear wheels.

5

When shifting from 4WD Auto to 4WD Low, most vehicles must be brought to a stop.

6

Most full-time AWD systems give the driver the option of 2WD or 4WD.

7

A device which allows the front and rear axles to rotate at different speeds in full-time 4WD and AWD systems works to eliminate driveline windup.

8

A viscous coupling must be used with a center differential.

9

Integrated full-time 4WD systems use _____ controls to enhance full-time operation.

10

Technician A says all-wheel drive vehicles spread the tractive effort to all four driving wheels. Technician B says all-wheel drive vehicles operating under normal conditions are driving in 2WD. Who is correct?

11

Which statement concerning turning a corner with a 4WD system is correct?

12

Technician A says the interaxle differential solves the problem of driveline windup during turns. Technician B says the interaxle differential increases performance in poor traction conditions. Who is correct?

13

Technician A says operating a vehicle in 4WD-Low on dry pavement increases tire wear. Technician B says driveline components may be damaged by operating in 4WD-High on drive pavement. Who is correct?

14

Technician A says viscous clutch biasing sends torque to the wheel with the least traction. Technician B says it will send torque to the wheel with the greatest traction. Who is correct?

15

Technician A says a transfer case may have a limited-slip, viscous-type clutch assembly. Technician B says a transfer case may have a multiple plate clutch assembly for limited slip. Who is correct?

16

When the transfer case is in the lock position, the vehicle should be _____.

17

Technician A says electronically controlled systems may use sensor inputs to control the center differential for front-rear torque bias. Technician B says the Porsche PTM system uses an electronically controlled motor in the transfer case. Who is correct?

18

Technician A says the Haldex clutch uses hydraulic pressure to regulate torque between the front and rear axles. Technician B says the Quaife differential uses clutches to regulate torque between front and rear axles. Who is correct?