stats and percentages COPY 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
what is the sign of a worn steering system?
steering wheel begins to shake
what does it mean if the steering wheel jerks between easy and sluggish?
dirt or air has probably entered the power steering system
what kind of force makes the main brake work?
hydraulic
what does brake servo do?
makes it easier to brake when the engine is running
what do you do if the brakes vibrate when using ABS brakes?
keep braking
what allows you to strongly brake by putting light pressure on the brakes?
brake servo
how do you emergency brake in a car with ABS?
brake AS HARD AS POSSIBLE
how should a good brake feel?
the pedal should stop halfway down and feel rigid
what does it mean if the break pedal feels spring?
air in the system
what does it mean if the brake pedal pushes down slowly ?
may be a leak
what does it mean if the brake pedal engages close to the floor?
might need to be repaired or adjusted
how do you check the brake servo?
press brake pedal down repeatedly. then, hold down the pedal as you start the engine. the pedal should move downward when you start the engine.
what shape is on the lid to the brake fluid?
a hexagon
what are the TWO meanings of the sign with the exclamation point?
the brake fluid level is too low OR the parking brake is engaged
how do you calculate meters per second?
divide speed by 3.6
how do you use a light horn in an emergeny?
flash full beams on and off
what lights must not be combined with dipped headlights or fog lights?
daytime running lights
when do you turn off the rear fog lights?
as soon as you’re convinced that the driver behind you has sighted you
what lights do you use when stopping or parking on a road with poor visibility?
parking lights
what does it mean if you hear a high pitched squealing sound when starting the engine?
the alternator belt isn’t working
what is the sign of a broken fuse?
the metal strip running between the fuse terminals has a break in it
how do you replace a fuse (in terms of what connects to what)?
connect matching colors
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
