stats and percentages Flashcards
what % of people who die in car accidents were not wearing a seat belt?
40 percent
at what speed do airbags deploy?
20-30 km/hr
how far must the driver sit behind the airbag?
25 cm
how far must the passenger sit behind the airbag?
50 cm
you are responsible that all passengers under age X have the right sort of seatbelt
age 15
people under this height must be in a special child seat
135 cm
children in this age range must be in a rear-facing seat
9 months to 4 years
children must be in a baby seat until this age
9 months
children must be this tall in order to sit in a seat with an airbag
140 cm
how many people can fit in a private car, max?
1 driver, 8 passengers
how does a roof box decrease a car’s fuel efficiency?
10 percent less efficient
you need to mark a load that projects backwards if it projects longer than this amount
one meter
if a load projects more than this amount forward it needs to be marked, even if it is visible
one meter
how far can a sideways load project?
20 cm to each side
what is the maximum vehicle width for a car with a projecting load?
260 cm
how does side force increased in relation to speed?
quadratically
how does BRAKING DISTANCE increase in relation to speed?
Quadratically
how does reaction distance increase in relation to speed?
proportionally
how does stopping distance increase in relation to speed?
the braking distance increased quadratically, but the reaction distance increased proportionally
what is the formula for reaction distance if a driver reacts in one second?
round speed to the nearest 10, remove the zero, and multiply by 3
what is the formula for braking distance?
divide the speed by ten, square the result, then divide by two
how does the reaction time increase in relation to speed?
trick question. it doesn’t. if the reaction time doubles, the reaction distance doubles, but the reaction time is not calculated based on speed.
stopping distance in ideal conditions when going 30 km/hr
13.5 meters
stopping distance in ideal conditions when going 50 km/hr
27.5 meters
stopping distance in ideal conditions when going 70 km/hr
45.5 meters
stopping distance in ideal conditions when going 90 km/hr
67.5 meters
stopping distance in ideal conditions when going 110 km/hr
93,5 meters
what should you do after changing the wheel?
retighten nuts after 50-100 km
how does kinetic energy increase in relation to speed?
quadratically
what kind of steering (over or under) is typical of a front wheel drive car?
understeering
at what age should tires be replaced,even if tread depth is still acceptable?
over 10 years old
what is the minimum tread depth for summer tired?
1.6 mm
what are the rules for using a spare wheel?
no futher than 80 KM and no more than 80 km/hr
how do you calculate meters per second?
divide speed by 3.6
if a battery is only 50 percent charged, what outside temp can it freeze at ?
minus 7 c
if a battery is fully charged, at what temp is there a risk of freezing
minus 65 degrees celsisus
if a battery is 80 % charged, it risks freezing at this outdoors temp:
minus 45 degrees celsius
what color terminals get connected first when jump starting a car?
red (positive)
what is the termf for the weight of the car + trailer at any given moment, including the driver, passengers, and cargo?
gross weight
what is the weight of the car and driver (no load, no passengers)?
kerb weight
what is the term for the MAXIMUM weight a car can have, including drivers, passengers, and cargo?
total weight
what is the term for the total weight minus the car, safety equipment, and driver?
maximum load
what kind of insurance must all cars have?
third party insurance
where are the warning signs placed on a road with a speed limit of 60 km/hr?
50-200 meters
where are the warning signs placed on a road with a speed limit of 50 km/hr?
five to 75 meters
where are the warning signs placed on a road with a speed limit of 80 km/hr?
150-250 meters
where are the warning signs placed on a road with a speed limit of 100+ km/hr?
200-400 meters
full beams, pedestrian with dark clothing and no reflectors
150 meters
full beams, pedestrian with reflectors
450 meters
dipped headlights, pedestrian with reflectors
125 meters
dipped headlights, pedestrians with dark clothing and no reflectors
25 meters
dipped headlights, pedestrian with bright clothing and no reflectors
60 meters
full beams, pedestrian with bright clothing and no reflectors
300 meters
what percentage of traffic accidents involving pedestrians occur in the dark?
50%
what is the month range for the most fatal accidents involving pedestrians?
november to january
what fraction of accidents involving pedestrians occur at or near pedestrian crossings?
1/3
how does ice affect braking distance, if you have studded tires?
2-3x longer
how does ice affect braking distances without studded tires?
3-4x longer
what is the worst temp for black ice?
0 degrees celsius
at what temp (and below) do roads get slippery?
4 degrees celsius
during what period are winter tires required (assuming winter conditions)?
december 1 to march 31
what is the earliest date you can switch to summer tires?
october 1
what is the latest date on which studded tires are allowed?
april 15
what is the latest date on which friction tires are allowed?
trick question, they can be used year round
what is the minimum tread depth for friction tires?
3 mm
what is a person’s risk of death is they are hit by a car going 50 km/hr?
80%
what is a person’s risk of death if they are hit by a car going 30 km/hr?
10%
what is the distance between verge markers on a country road?
50 meters
what is the distance between verge markers on a motorway?
100 meters
what is true of road markers on a curve?
they may be only 25 meters apart
what does a center line with a 1:3 ratio indicate?
a speed limit of at least 70 km/hr applies (usually seen on country road)
what does a center line with a 1:1 ratio indicate?
that the speed limit is 50 km/hr or lower (seen in dense areas)
you get your license revoked if you are caught driving this much over the speed limit
30 km/hr, unless the speed limit on the road is already 30 km/hr, in which case going 20 over gets you revoked
when your BAC is .2, your chance of getting in a fatal accident is X times more
10 -12 times
about how many people die in alcohol-related accidents each year
75
who runs the highest risk of having an accident due to fatigue?
a man who is 18-24 years old
if you’re 18-24, and have a BAC of .5, how increased is your chance of being involved in a traffic accident?
900x greater
for a driver with a BAC of .5-1, how much more likely is your chance of getting in an accident?
13x
at a blood alcohol level of 1-1.5, how much increased risk is there of getting in a traffic accident?
100 times
