Formulae Flashcards
Learn all the math stuff
What is the minimum visual acuity for a driver?
5/10
How much does the chance of an accident increase if you are driving and talking on the phone at the same time?
+30%
In how many hours of driving is fatigue increased, and how much risk increases?
In two hours, the risk doubles.
How much is the risk of a mortal accident increased by alcohol?
Times 10.
When does alcohol reach its maximum effect?
One hour with a meal. 30 minutes with fasting.
On average how does alcohol diminish in the blood?
.10 to .15g/L of blood per hour.
On average how much does one glass of (any) alcohol raise the blood level?
.2 to .25g/L of blood.
2 glasses of alcohol raises the blood level to where?
.5g/L of blood.
The expiration of air on the ethylometer is matched to the g/L of blood how?
.2 g/L of blood = .1 mg/L of air; .5g/L of blood =.25 mg/L of air; .8g/L of blood =.4 mg/L of air.
What is the max level of g/L of blood to be considered drunk?
.5 g/L of blood or .25 mg/L of air.
What is the average time of reaction for a driver in good condition?
1 second, but this can vary due to the state of the driver and more, even to 2 and 3 seconds, and more.
How do I calculate the distance covered during the time of reaction?
- Convert km/h to m/s by dividing the km/h x 1000 by 3600.
- More simply, multiply the tens of the speed by 3: (50 km/h = 15 m)
In dry conditions, how do I calculate stopping (reaction + braking) distance?
Multiply the tens digit of your speed by itself (50 km/h = 25 m while 100 km/h = 100 m)
How do I calculate stopping distance in wet conditions?
Multiply the dry condition figure by 1.5 (@50 km/h 5*5 then *1.5 = 37.5 m).
How do I calculate the security distance?
It is two seconds except when a vehicle masks visibility ahead.
