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