General Knowledge I
When is it necessary to learn how a fire extinguisher works?
Before the fire happens
The slack adjuster needs to be adjusted if the free play is more than:
1 Inch
Which part of the kingpin should the locking jaws close around
The Shank
Why should you limit your use of the air horn.
It can startle other drivers
What is the longest interstate highway in the U.S.
I-90 ( runs between Boston, Massachusetts and Seattle, Washington
The primary cause of fatal crashes is:
Driving too fast
It is not safe to drive a vehicle that has a brake drum with cracks longer than _the width of the friction area
1/2
Air equipped trailers made before 1975
Often do not have spring brakes
Most skids are caused by:
Going to fast or stopping quickly
What is the maximum weight allowed on a tractor trailer
80,000 pounds
Stab braking should not be used on vehicle with:
Antilock Brakes
the safety valve is set to automatically reduce tank pressure at what psi:
150 PSI
After you have coupled the trailer, you should start raising the landing gear by using:
Low Gear
What is not a danger to rough acceleration
Tire Damage
Where is the world largest truck stop
IOWA 80 Truck Stop (Walcott, Iowa) 900 Truck Parking spaces.
When parked on the side of the road at at night, you must:
Turn on your 4 ways
When does your low pressure warning light and buzzer come
Before 55 PSI
When you turn suddenly while pulling doubles, which trailer is most likely to turn over.
Rear Trailer
How do you recognize hazardous materials by looking on the container
Labels
The number of truckers in the U.S.
3.5 million
Why may tourists be a hazard?
They may move slowly, change lanes unexpectedly or stop suddenly.
An air brake system is fully charged at what PSI:
125 PSI
This type of of tractor and trailer require the shortest amount of stopping distance
Fully Loaded
Backing a commercial vehicle is
Always Dangerous
Who invented the first semi truck
Alexander Winton (1898)