JH 7th edition Chapter 93 A5 12 Questions

What is the main purpose of brakes on a vehicle?

• To increase the speed of the vehicle

• To control the steering of the vehicle

• To convert vehicle movement into heat to stop the wheels

• To provide a comfortable ride for passengers

Answer explanation

The main purpose of brakes is to convert vehicle movement into heat, which stops the wheels. This process is essential for safely reducing speed and bringing the vehicle to a halt, making it the correct choice.

Which type of brakes are used on the front of most vehicles built since the early 1970s?

• Drum brakes

• Disc brakes

• Emergency brakes

• Hydraulic brakes

Answer explanation

Disc brakes have been the standard for the front of most vehicles since the early 1970s due to their superior stopping power and heat dissipation compared to drum brakes, making them the correct choice.

What are the six subsystem categories of the brake system?

• Apply, boost, hydraulic, wheel brakes, brake balance control, and brake warning lights

• Accelerate, decelerate, balance, control, warning, and safety

• Pressure, power, control, balance, warning, and safety

• Friction, pressure, control, balance, warning, and safety

Answer explanation

The correct answer lists the six subsystem categories of the brake system: apply, boost, hydraulic, wheel brakes, brake balance control, and brake warning lights, which are essential for the system's functionality.

What is the purpose of adjustable pedals in a vehicle?

• To make it easier for the driver to see the road

• To make it more comfortable for the driver to sit

• To allow the driver to position the pedals

• To improve the performance of the brake system

Answer explanation

Adjustable pedals allow the driver to position the pedals for optimal comfort and control, accommodating different leg lengths and driving preferences, which enhances the overall driving experience.

What is the purpose of ABS in a vehicle?

• To improve fuel efficiency

• To prevent the wheels from locking during braking

• To increase the speed of the vehicle

• To reduce the weight of the vehicle

Answer explanation

The purpose of ABS (Anti-lock Braking System) in a vehicle is to prevent the wheels from locking during braking. This enhances control and stability, especially in slippery conditions, allowing the driver to steer while braking.

What does FMVSS 135 establish?

• Specific brake performance requirements for passenger vehicles, multipurpose passenger vehicles, trucks, and buses

• Guidelines for the design of vehicle interiors

• Standards for vehicle emissions

• Regulations for the use of seat belts in vehicles

Answer explanation

FMVSS 135 establishes specific brake performance requirements for various types of vehicles, ensuring safety and effectiveness in braking systems.

How many steps are there in the FMVSS 135 brake test procedure?

• 12

• 18

• 24

• 30

Answer explanation

The FMVSS 135 brake test procedure consists of 18 steps, which detail the testing process for vehicle braking performance. This makes 18 the correct answer among the provided choices.

What is the goal of any brake system repair?

• To improve the performance of the brake system

• To reduce the weight of the vehicle

• To restore like-new performance

• To increase the speed of the vehicle

Answer explanation

The goal of any brake system repair is to restore like-new performance, ensuring the vehicle's braking efficiency and safety are at optimal levels, rather than focusing on performance enhancement or weight reduction.

Who is responsible for maintaining the designed-in level of braking performance?

• The vehicle manufacturer

• The vehicle owner

• The brake system technician

• The government regulatory agency

Answer explanation

The vehicle manufacturer is responsible for ensuring that the braking performance meets safety standards and specifications. They design and test the brake systems to maintain the required performance levels.

What is the GM regular production code (RPO) used for?

• To identify optional equipment and brake system type or rating

• To regulate the use of seat belts in vehicles

• To establish specific brake performance requirements for passenger vehicles, multipurpose passenger vehicles, trucks, and buses

• To provide guidelines for the design of vehicle interiors

Answer explanation

The GM regular production code (RPO) is used to identify optional equipment and the type or rating of the brake system in vehicles, making it essential for understanding vehicle specifications.