ADT 7-2

Question 1

The spring rate of a spring is measured in units of ________.

Answer 1

Lb. per Inch

Question 2

Two technicians are discussing torsion bars. Technician A says that many torsion bars are adjustable to allow for ride height adjustment. Technician B says that torsion bars are usually marked left and right and should not be switched side to side. Which technician is correct?

Answer 2

Both Technicians A and B

Question 3

A vehicle makes a loud noise while traveling over bumpy sections of road. Technician A says that worn or deteriorated control arm bushings could be the cause. Technician B says that worn or deteriorated strut rod bushings could be the cause. Which technician is correct?

Answer 3

Both Technicians A and B

Question 4

Two technicians are discussing MacPherson struts. Technician A says that in most applications the entire strut assembly rotates when the front wheels are turned. Technician B says a typical MacPherson strut suspension system uses only one control arm and one ball joint per side. Which technician is correct?

Answer 4

Both Technicians A and B

Question 5

Technician A says that regular replacement shock absorbers will raise the rear of the vehicle that is sagging down. Technician B says that replacement springs will be required to restore the proper ride height. Which technician is correct?

Answer 5

Technician B only

Question 6

A vehicle used for 24-hour-a-day security was found to have damaged suspension-limiting rubber jounce bumpers. Technician A says sagging springs could be the cause. Technician B says defective or worn shock absorbers could be the cause. Which technician is correct?

Answer 6

Both Technicians A and B

Question 7

The part of many rear suspension systems that controls side-to-side movement is called the ________.

Answer 7

Track Rod or Panhard Rod

Question 8

Two technicians are discussing air shocks. Technician A says that air is forced through small holes to dampen the ride. Technician B says that air shocks are conventional hydraulic shock absorbers with an airbag to control vehicle ride height. Which technician is correct?

Answer 8

Technician B only

Question 9

The owner of a pickup truck wants to cut the coil springs to lower the vehicle. Technician A says that the ride will be harsher than normal if the springs are cut. Technician B says that the springs could be damaged, especially if a cutting torch is used to cut the springs. Which technician is correct?

Answer 9

Both Technicians A and B

Question 10

A MacPherson strut is a structural part of the vehicle. True or False?

Answer 10

True

Question 11

Unusual noise during a test drive can be caused by which of the following?

A.) Defective wheel bearings or stabilizer bar links.

B.) Defective or worn control arm bushings or ball joints.

C.) Worn or defective CV joints.

D.) All of the above

Answer 11

D.) All of the above

Question 12

Two technicians are discussing non-indicator-type ball joint inspection. Technician A says that the vehicle should be on the ground with the ball joints loaded, then checked for freeplay. Technician B says that the ball joints should be unloaded before checking for freeplay. Which technician is correct?

Answer 12

Technician B only

Question 13

Most manufacturers specify a maximum axial play for ball joints of about ________.

Answer 13

0.050 in. (1.27 mm)

Question 14

The preferred method to separate tapered chassis parts is to use ________.

Answer 14

A puller tool or two hammers to shock and deform the taper.

Question 15

A light film of oil is observed on the upper area of a shock absorber. Technician A says that this condition should be considered normal. Technician B says that a rod seal may bleed fluid during cold weather, causing the oil film. Which technician is correct?

Answer 15

Both Technicians A and B

Question 16

Before the strut insert can be removed from a typical MacPherson strut assembly, which operation is necessary to prevent possible personal injury?

Answer 16

The coil spring should be compressed.

Question 17

What should the technician do when replacing stabilizer bar links?

Answer 17

The links can be replaced individually, yet the manufacturer often recommends that the links at both ends be replaced together.

Question 18

A noise and a pull toward one side during braking is a common symptom of a worn or defective ________.

Answer 18

Strut rod bushing

Question 19

To help prevent vehicle wandering on a vehicle with torsion bars, the ride height (trim height) should be within ________ side to side.

Answer 19

0.125 in. (3.2 mm)

Question 20

Two technicians are discussing suspension bushings. Technician A says that replacing the control arm bushings usually requires special tools. Technician B says using high-performance urethane bushings may cause excessive noise to be transferred to the passenger compartment. Which technician is correct?

Answer 20

Both Technicians A and B

Question 21

A vehicle equipped with a coil spring front suspension and a leaf spring rear suspension “dog tracks” while driving on a straight, level road. Technician A says that a broken center bolt could be the cause. Technician B says defective rear shock absorbers could be the cause. Which technician is correct?

Answer 21

Technician A only

Question 22

When axle windup is controlled by the rear-leaf spring during acceleration, this system is called ________.

Answer 22

Hotchkiss Drive

Question 23

A loud “bang” is heard and felt every time the accelerator is depressed or released on a rear-wheel-drive vehicle. Technician A says that a leaf spring could be the cause. Technician B says a broken torque arm could be the cause. Which technician is correct?

Answer 23

Both Technicians A and B

Question 24

Technician A says that all leaf springs are mounted lengthwise on the rear of many vehicles. Technician B says that some vehicles use a transversely mounted leaf spring on the rear. Which technician is correct?

Answer 24

Technician B only

Question 25

A strut-type suspension is used ________.

Answer 25

In both the front and rear.

Question 26

Two technicians are discussing rear shock absorbers. Technician A says that if one shock is leaking, then both rear shock absorbers should be replaced. Technician B says that the rear axle should be supported before removing rear shock absorbers. Which technician is correct?

Answer 26

Both Technicians A and B

Question 27

Technician A says that installing new gas shock absorbers will raise the rear of the vehicle. Technician B says that the shock absorbers usually limit the downward travel of the rear suspension. Which technician is correct?

Answer 27

Technician B only

Question 28

The left front of the vehicle is higher than the right front and the right rear is lower than the left rear. What is most likely the cause of this problem?

Answer 28

A sagging right-rear spring

Question 29

One rear leaf spring is broken. Technician A says that both rear leaf springs should be replaced. Technician B says that only the broken spring needs to be replaced. Which technician is correct?

Answer 29

Technician A only

Question 30

Two technicians are discussing electronic leveling systems. Technician A says that a weight should be placed in the vehicle as part of the diagnostic procedure. Technician B says many ride height sensors are adjustable. Which Technician is correct?

Answer 30

Both Technicians A and B

Question 31

Which of the following sensors are used as a height sensor on vehicles equipped with an electronically controlled suspension?

A.) Hall-effect.

B.) Photo Cell.

C.) Potentiometer.

D.) All of the above

Answer 31

D.) All of the above

Question 32

Which of the following sensors do most vehicles use if equipped with electronic suspension?

A.) Height Sensors

B.) Steering Wheel Position Sensors

C.) Lateral Accelerometer Sensors

D.) All of the above

Answer 32

D.) All of the above

Question 33

A lateral acceleration sensor is used to provide the suspension control module with feedback regarding ________ force.

Answer 33

Cornering

Question 34

A steering wheel position sensor is being discussed. Technician A says that the sensor is used to determine the direction the steering wheel is turned. Technician B says that the sensor detects how fast the steering wheel is turned. Which technician is correct?

Answer 34

Both Technicians A and B

Question 35

Technician A says that an electric control module used in the suspention system is the same as that used for engine control. Technician B says that most electronically controlled suspension systems use a separate electronic control module. Which technician is correct?

Answer 35

Technician B only

Question 36

Which of these actuators is used on electronically controlled suspensions?

A.) Solenoid

B.) Relay

C.) Electric motor

D.) All of the above

Answer 36

D.) All of the above

Question 37

Why is the typical rear load-leveling system connected to the ignition circuit?

A.) To keep the system active for a given time after the ignition is switched off.

B.) To prevent the system from working unless the ignition key is on.

C.) To keep the compressor from running for an extended period of time.

D.) All of the above

Answer 37

D.) All of the above

Question 38

Which sensor can be tested by unbolting the sensor and with the ignition on, engine off (KOEO), looking at the scan tool data?

Answer 38

“G” sensor

Question 39

The firm setting is usually selected by the electronic suspension control module whenever which of the following occurs?

A.) High Speed

B.) Rapid Braking

C.) Rapid Acceleration

D.) All of the above

Answer 39

D.) All of the above

Question 40

Which of the following is the least likely sensor to cause an electronic suspension fault?

A.) Yaw Sensor

B.) Throttle Position (TP) Sensor

C.) Steering Wheel Position Sensor

D.) Vehicle Speed Sensor

Answer 40

B.) Throttle Position (TP) Sensor