DE Unit 5
the minimum legal tread depth for the tires on your vehicle is
1/16
During a rainfall, roads are slickest
10-15 minutes
At 60 mph, on dry pavement, the vehicle-braking distance for a 3,000-pound vehicle to come to a stop is
160 feet
A car moving at 60 mph will take how much time to come to a complete stop?
4-6 seconds
The percentage of traffic fatalities that occurs between 9 P.M. and 6 A.M. is
50 percent
Human-reaction distance generally adds how much to total braking distance?
66 feet
One reason an engine can fail is
a broken timing gear. a malfunctioning fuel system. a malfunctioning electrical system. all of the above
Before you negotiate a curve, you should look for
a sign with the maximum safe speed limit.
antilock braking system
abs
sticking together
adhesion
If you are in a collision, you should NOT
admit fault. sign any form except those given to you by police. accuse anyone of causing the collision. all of above
Engine fires are usually caused by
an electrical problem.
a blowout occurs when
an explosion of a tire while a vehicle is in motion.
Your ability to see is diminished at night and just as much
at sunrise
You usually find a runoff area
at the bottom of a long hill.
roads built higher on the outside than on the inside
banked roads
a skid caused by a tire suddenly going flat
blowout skid
When your vehicle skids, you should not
brake
a skid caused by the brakes being applied too hard
breaking skid
when all four wheels lose traction in a turn simultaneously
cornering skid
roads built higher in the center than at either edge
crowned roads
When your vehicle skids, you lose control of its
direction & speed
When driving downhill in a vehicle with a manual transmission, you should
downshift
When driving uphill in a vehicle with a manual transmission, you should
drive at a safe speed
Going up and down hills does not affect driving difficulty.
false
If you cannot see well in heavy sleet or snow while driving, the best thing to do is turn on your high beams.
false
If you suffer total steering failure, you should use the foot brake, not the parking brake, to stop.
false
If your car is fast enough, you should try to out drive a tornado rather than stopping.
false
Rain and snow only decrease your ability to see ahead.
false
The amount of air pressure in your tires does not affect traction.
false
When parking in a hailstorm, you should angle your car so that the hail hits the back of your car.
false
While waiting for help to arrive, it is okay to sit in your vehicle while it idles, or stand in front of it or behind it.
false
You do not need to slow down if you cannot keep a safe distance between your vehicle and another, as long as you think you can stop in time.
false
You do not need to turn off your high beams if you know you will quickly pass an approaching car.
false
The number one weather-related killer in the United States is/are
floods
Doubling your speed multiplies your braking distance by
four times
the force between two surfaces that resists the movement of one surface across the other
friction
In wet conditions, if you hydroplane, you should
gently pump the brake pedal if you need to brake.
The natural laws include the law of
gravity
the natural force at work on your vehicle on hills is
gravity
the ability to change the vehicle speed or direction
grip
While driving during dusk and dawn you should use your
headlights
Glare is caused when the sun
hits your windshield
the distance traveled from the time your eyes see a hazard to the time your brain recognizes it
human-perception time
When a vehicle's tires completely lose contact with the road and move on a thin film of water, it is called
hydroplanning
What reduces traction even more than rain?
ice
states that objects at rest do not move unless some force acts on them
inertia
To maintain or improve traction while driving, you should
inflate them correctly. buy the proper tires for your vehicle. ensure the suspension is working properly. all of the above
energy of motion
kinetic energy
One of the best ways to help yourself in difficult situations is to
know what to do in an emergency situation.
A personal factor that can control to drive more safely would be
knowlegde
In addition to visibility issues, a possible health issue while driving in the mountains is
lack of oxygen
You can raise a car's center of gravity by
loading a roof rack with items
When driving in fog, you should drive with your
low beams on
combination of object's weight and speed
momentum
Smaller cars with lower centers of gravity are
more stable than cars with higher centers of gravity
it is acceptable to use your high beams
on very dark roads with no traffic around.
the best way to reduce risk in icy conditions is to
postpone driving until the weather clears.
a skid caused by excess acceleration
power skid
If you experience sudden brake failure while driving,
rapidly pump the brake pedal.
When dealing with glare, you should
reduce your speed
High beams should not be used in bad weather because they
reflect light back at you.
If you live in a snowy area, you should keep the following item/s in your car:
shovel jumper cables windshield scraper all of the above
when your vehicle careens wildly across the road
skid
When driving on a crowned road, you can gain more control of your vehicle by
slowing down
Vehicle fatality rates are highest for
small pickup trucks and small utility vehicles.
A visibility problem specific to driving in the mountains would be
steep grades
In wet, rainy conditions, when entering a turn or curve, you should avoid sudden
stops acceleration starts all of the above
In addition to weather and the road surface, the quality of what can have an effect on traction?
suspension
Whether you need to speed up or slow down is determined by
the location of other vehicles in traffic
The reinforced glass on your vehicle made to withstand driving and pelting objects is
the windshields
Braking capability depends on
tire pressure and suspension system wind speed and the slope of road. brake alignment and pad material. all the above
To employ the threshold/squeeze braking method, you apply the brake pedal with
toes
the distance it takes to stop a vehicle
total stopping distance
The single most important factor in maintaining vehicle control is
traction
A vehicle skid usually means you
tried to change speed and/or direction too quickly
A banked curve works with the force of gravity to help you stay on the road through the turn.
true
Accelerating or braking can be better choices than steering to avoid a collision.
true
An easy way to minimize glare is to see that your windshield is clean.
true
Centrifugal force pushes you in the direction opposite to the way you are turning.
true
Driving up a long, steep hill can cause your engine to overheat.
true
Even though a flooded area appears shallow enough to cross, you should not try to cross it.
true
If both headlights fail at the same time, you should try switching to high beams.
true
If you cannot avoid a collision, you should steer so that you sideswipe an object instead of hitting it head-on.
true
If you get stuck in the snow, you may be able to free your vehicle by "rocking" it.
true
If your vehicle breaks down and you cannot call for help, you should raise the hood or turn on your flashers.
true
The three major highway conditions that require you to adjust speed are changes in visibility, traction, and space.
true
Wet roads or excessive speed can cause your vehicle to go into a skid.
true
When driving in rain and snow you should keep your low beams on at all times.
true
When in a skid, you might need to make several steering corrections to get the car to go where you want it.
true
You should avoid looking in the headlights of oncoming vehicles.
true
When you know you will be driving in the mountains, you should
try to find out about current weather conditions.
If your accelerator sticks, you should not
try to unstick the pedal until after you pull off the road.
When approaching a large vehicle on a slush-covered roadway, you should
turn on your windshield washers before you meet.
In the case of flooding, cars can easily be carried away by water.
two feet of water
If you get caught driving in a hailstorm, pull to safety
under an overpass
the distance the vehicle travels once the brakes have been applied
vehicle braking distance
An environmental factor that can affect driving includes
weather. lighting. road conditions. all of the above
Weather that causes wide areas of glare occurs during
winter
If you are in a collision, exchange information such as
your driver's license information.
