Question 1

Seat belt retractors are being discussed. Technician A says that when the belt is suddenly jerked on a webbing-sensitive retractor system, the retractor should lock up. Technician B says a vehicle-sensitive retractor can only be tested by braking the vehicle at speeds of 5 to 8 MPH. Who is correct?

Accepted Answer

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

Question 2

Technician A says if the seat belt retractor does not retract when the belt is disconnected, the retractor must be replaced. Technician B says if a seat belt is cut, it must be replaced. Who is correct?

Accepted Answer

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

Question 3

Always disconnect the negative battery cable and wait the recommended time before attempting any service on an air bag system.

Accepted Answer

A) True 
 B)False

Question 4

A live air bag must be deployed before disposal.

Accepted Answer

A) True 
 B)False

Question 5

What is the function of a knee bolster [knee diverter]?

Accepted Answer

The answer of What is the function of a knee...

Question 6

What is the difference between active and passive restraint systems?

Accepted Answer

The answer of What is the difference between active and...

Question 7

Most side impact air bag systems are deployed from the ____________________ or the outside of the ____________________.

Accepted Answer

The answer of Most side impact air bag systems are...

Question 8

What is the distinguishing feature of "second generation" air bags?

Accepted Answer

The answer of What is the distinguishing feature of "second...

Question 9

Second generation air bag systems are being discussed. Technician A says a second generation air bag inflates with about 20 to 35 percent more energy. Technician B says second generation air bags reduce the number of injuries caused by the air bag itself. Who is correct?

Accepted Answer

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

Question 10

Technician A says during a frontal collision, the backup power supply will deploy the air bag if the battery is disconnected. Technician B says all backup power supplies will power down one minute after the negative battery is disconnected. Who is correct?

Accepted Answer

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

Question 11

Technician A says the air bag module can be serviced. Technician B says the inflator assembly is composed of a solid chemical gas generator containing sodium azide propellant. Who is correct?

Accepted Answer

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

Question 12

The powdery substance released from the air bag when it is deployed is ______.

Accepted Answer

A)  cornstarch 
B)  talcum powder 
C)  both "cornstarch" and "talcum powder" 
D)  neither "cornstarch" nor "talcum powder"

Question 13

The wiring harness and electrical connectors for the air bag system components are colored ______.

Accepted Answer

A)  red 
B)  yellow 
C)  orange 
D)  day glow pink

Question 14

The left and right side seat belt retractors are interchangeable.

Accepted Answer

A) True 
 B)False

Question 15

Vehicle-sensitive seat belt retractors are being discussed. Technician A says the vehicle must be driven at 5 to 8 MPH to test the action of the retractors. Technician B says the retractors should lock when the brakes are applied at speeds above 8 MPH and release when the vehicle slows to less than 8 MPH. Who is correct?

Accepted Answer

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

Question 16

Pyrotechnic-type pretensioners should be replaced ______.

Accepted Answer

A)  every 5 years 
B)  every 10 years 
C)  after deployment of the air bag 
D)  never

Question 17

The approximate deployment time for most air bags is ______.

Accepted Answer

A)  less than 100 milliseconds 
B)  about 500 milliseconds 
C)  about 0.5 seconds 
D)  less than 5 milliseconds

Question 18

Technician A says when the SIR warning light is illuminated all the time, there is a fault code stored in the SIR control module. Technician B says if the warning light is on, the air bag system is turned off and the air bag will not deploy in an accident. Who is correct?

Accepted Answer

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

Question 19

When unbuckled, seat belts are stowed away by seat belt ____________________.

Accepted Answer

The answer of When unbuckled, seat belts are stowed away...

Question 20

What is the purpose of the clockspring?

Accepted Answer

The answer of What is the purpose of the clockspring?...

Exam 48: Restraint Systems: Theory, Diagnosis, and Service

Seat belt retractors are being discussed. Technician A says that when the belt is suddenly jerked on a webbing-sensitive retractor system, the retractor should lock up. Technician B says a vehicle-sensitive retractor can only be tested by braking the vehicle at speeds of 5 to 8 MPH. Who is correct?

Technician A says if the seat belt retractor does not retract when the belt is disconnected, the retractor must be replaced. Technician B says if a seat belt is cut, it must be replaced. Who is correct?

Always disconnect the negative battery cable and wait the recommended time before attempting any service on an air bag system.

A live air bag must be deployed before disposal.

What is the function of a knee bolster [knee diverter]?

What is the difference between active and passive restraint systems?

Most side impact air bag systems are deployed from the or the outside of the .

What is the distinguishing feature of "second generation" air bags?

Second generation air bag systems are being discussed. Technician A says a second generation air bag inflates with about 20 to 35 percent more energy. Technician B says second generation air bags reduce the number of injuries caused by the air bag itself. Who is correct?

Technician A says during a frontal collision, the backup power supply will deploy the air bag if the battery is disconnected. Technician B says all backup power supplies will power down one minute after the negative battery is disconnected. Who is correct?

Technician A says the air bag module can be serviced. Technician B says the inflator assembly is composed of a solid chemical gas generator containing sodium azide propellant. Who is correct?

The powdery substance released from the air bag when it is deployed is ______.

The wiring harness and electrical connectors for the air bag system components are colored ______.

The left and right side seat belt retractors are interchangeable.

Pyrotechnic-type pretensioners should be replaced ______.

The approximate deployment time for most air bags is ______.

Technician A says when the SIR warning light is illuminated all the time, there is a fault code stored in the SIR control module. Technician B says if the warning light is on, the air bag system is turned off and the air bag will not deploy in an accident. Who is correct?

When unbuckled, seat belts are stowed away by seat belt ____________________.

What is the purpose of the clockspring?