Drivers ed chapter 9 test

What is the impact that temperature has on air pressure?

1. cold causes tires to become underinflated 2. heat causes tire pressure to increase

In the picture below, what three things determine how hard the two cars collide with each other (force of impact)?

1. speed 2. weight 3. time between impact and when vehicles come to a stop

What does the picture below illustrate about total stopping distance?

1. the newer the more tread the sooner it will stop 2. the less tread on a tire the longer it takes to stop

Vehicle A weighs 3,000 pounds. Under ideal conditions traveling at 55 miles per hour, its braking distance is 200 feet. If it carries 3,000 pounds of extra weight, what is the new braking distance (type number only)

400 200 * 2

Vehicle B weighs 6,000 pounds. Under ideal conditions traveling at 40 miles per hour, its braking distance is 200 feet. If it doubles its speed to 80 miles per hour, what is the new braking distance

800 200*4 double side quadruple stopping distance

According to the textbook, what is the purpose of most streets being a crowned surface?

Crowned surfaces help rainfall drain from the roadway.

What does this mean for the car with the lower center of gravity?

It will have more stability and less likely to roll than the car with the higher center of gravity.

What does the picture below illustrate about total stopping distance (weight)?

The heavier the vehicle the longer it takes to stop

What does the below picture illustrate about driving? speed *

The speed of a vehicle is often the determining factor on whether a collision occurs or not.

According to the picture below, what can we learn about driving weather and braking ?

We need to reduce our speed and increase following distance in adverse weather. Braking distance increases on wet road surfaces.

According to the picture below, what happens to the pitch of a vehicle when it applies the brakes?

Weight shifts forward and the front of the car lowers.

A safety belt that a vehicle's occupant must adjust is an example of a ______________ _________________ _____________.

active restraint device

A curve that is higher on the outside is a _______________ _______________. *

banked curve

A bald tire might result in a _______________, which is a sudden loss of air pressure in the tire.

blowout

Which of the following actions uses available traction? *

braking accelerating turning

The DISTANCE your vehicle travels from the time you apply the brakes until the vehicle stops.

braking distance

The __________ ____ _____________ is a point around which an object's weight is evenly distributed. *

center of gravity

Your tires may become underinflated in ________ weather.

cold

In the picture below, what modern safety feature is illustrated to reduce crash forces to the passenger

compartment

What most likely made the collision in the picture below a reality?

double the weight double the stopping distance

When an object moves, it uses kinetic energy, which is called _____________ _____ _______________. *

energy of motion

When properly adjusted, a safety belt

fits snugly across the upper body and hips.

The __________ ______ ______________ is the force with which one moving object hits another object. *

force of impact

The gripping action that keeps tires from slipping is _______________.

friction

_________________ is the force that pulls vehicles toward the earth.

gravity

Which of the vehicles in the picture below has a higher center of gravity? *

green

Good shock absorber

helps create traction

Which natural law is this? Objects at rest tend to stay at rest and objects in motion tend to stay in motion, unless acted upon by a force.

inertia

According to the picture below, identify the inflation that caused this pattern of wear. 3rd pic

overinflation

A restraint device, such as an airbag, that works automatically and occupant doesn't need to fasten is a ______________ _________________ ______________. *

passive restraint device

In the picture below, what part of total stopping distance is missing? orange cars

perception distance

The DISTANCE traveled while you identify a situation.

perception distance

Length of TIME it takes you to identify, predict, and decide to slow for a hazard.

perception time

According to the picture below, identify the inflation that caused this pattern of wear. 1st pic

proper inflation

The DISTANCE your vehicle travels after you identify a hazard until you react to the hazard.

reaction distance

The length of TIME you take to execute your action in response to a identifying a hazard.

reaction time

The resulting weight shift from hard braking or fast acceleration can result in the tires losing contact with the road and a __________

skid

As a result of this concept, what plays a more significant role in most crashes, speed or weight?

speed

The DISTANCE your vehicle travels from the time you perceive a hazard until you reach a complete stop.

total stopping distance

_______________ is the friction which allows tires to grip the roadway

traction

The grooved surface of a tire, called ____________, grips the roadway.

tread

When it is wet, water flows through the grooves in the ____________ and away from the tire.

tread

In order to maximize traction, a tire must have proper

tread and inflation

According to the picture below, identify the inflation that caused this pattern of wear. 2nd pic

underinflation