Driving Safely Flashcards
How much tread do you need on front tires to operate safely?
4/32” aka 1/8”
How much tread do you need on tires other than front tires?
2/32” aka 1/16”
Where are regrooved, recapped, or retreaded tires not allowed to be used?
On the front wheels of a bus
Steering wheel play of more than ______ degrees or _______inches at the rim of a 20” steering wheel can make it hard to steer
- 2.
How many leaf springs can be broken before the vehicle has to be put OOS?
One fourth or more of the leaves in any spring assembly
Can a vehicle be operated with a main leaf spring broken?
No.
Can a vehicle be operated if a leaf spring is missing ?
No
What are the emergency equipment required to be carried?
Fire extinguisher
Spare fuses
Warning devices (3 red triangles)
Air pressure should build from ____ to ____psi within _____ mins
50-90 3 mins
Air pressure governor cut out is usually _____ to ______ psi
120-140 psi
How often must drivers of trucks transporting cargo inspect it?
Within the first 50 miles, and every 150 miles or every 3 hours. Whichever comes first
How do you test hydraulic brakes for a leak?
Pump pedal 3 times and apply firm pressure for 5 seconds. Pedal should not move.
How do you test parking brake?
Seat belt.
Set brake
Put vehicle into low gear pull against brake
How do you test service brake stopping action?
Go 5 mph
Push pedal firmly
Look for pulling or problems
What are the two special conditions where you should downshift?
Before starting downhill
Before entering a curve
Retarders keep you from skidding when the road is slippery?
True or false?
False
What are two ways of knowing when to shift?
Engine speed
Road speed
How far ahead should a driver be looking? (Time)
12-15 seconds ahead
How far ahead should a driver look? (Distance)
Low speeds- one block
High speeds- quarter mile
What are three good rules for using turn signals ?
Signal early
Signal continuously
Cancel your signal
How can you warn drivers behind you that you’ll need to slow down?
A few light taps on the brake pedal, enough to flash the brake lights
Should you signal drivers when it’s safe to pass you?
No
Should you tap the horn lightly or flash your lights when passing ?
Yes, do this so they know you’re there. 2.5.2
How long do you have to put out your emergency warning devices if you must stop on a road or shoulder?
Within 10 mins
If you stop on a one way or divided highway, where should you place your warning devices?
10ft,
100ft,
And 200ft
Torward the approaching traffic
If you stop on a 2 lane rd with traffic on both directions, where should you place warning devices?
Within 10ft of front or rear corners
100 ft behind and 100ft ahead of the vehicle
If you are stopped beyond a hill, where drivers can’t see the vehicle within 500ft, where should the warning devices be placed?
Move rearmost triangle to a point back down the road so warning is provided
What is perception distance?
The distance your vehicle travels from the time you see a hazard until your brain recognizes it
What is reaction distance?
The distance you continue to travel before you physically hit the brakes
What is the average driver reaction time?
3/4 - 1 second
What is the average driver reaction distance traveled at 55 mph?
61 ft
What is braking distance?
The distance your vehicle will travel in ideal conditions while you are braking
At 55 mph on dry pavement with good brakes, what is the braking distance?
216 ft
What is total stopping distance?
The total minimum distance your vehicle will travel
Total stopping distance at 55 mph?
419 feet
Doubling speed 20-40 makes stopping distance ___times longer
4 times
Triple speed from 20-60 stopping distance is ___ times greater.
Nine times
T or F
Empty trucks stop sooner than fully loaded trucks
False
How much should you reduce speed on a wet road?
By one third
How much should you reduce speed on packed snow?
By half or more
How much should you reduce speed if the road surface is icy?
To a crawl
What should you do if hydroplaning?
Release accelerator and push in clutch
What is the safest speed when driving in heavy traffic?
The speed of other vehicles
How much space should you keep in front of you at speeds below 40 mph?
One second for every 10’ of vehicle length.
Over 40 add one Sec
What is something you can do when being tailgated to reduce chances of a crash?
Increase following distance
Where can strong winds be bad?
Coming out of tunnels
When do you start turning on a left turn?
When you reach the center of the intersection
What does the symbol red triangle with orange center mean?
Slow moving vehicle
What should you do when someone coming at you has their brights on?
Look at the right side of the road
How far ahead can you see with your low beams?
250 ft
How far ahead can you see with you high beams?
350-500ft
What distance should you switch off your high beams
500 ft
When driving in hot weather how often should you inspect your tires?
Every two hours or every 100 miles
How should you brake when going down a hill?
Brake till you get 5mph below safe speed, release brakes
Brake again when at your safe speed
How long does it take a tractor trailer to clear a double RR track?
14 seconds
Should you apply brakes when turning?
No
