General Knowledge
What is the vision requirement for a CDL A license?
20/40 vision
What is the air brake lag distance?
The distance it takes for the brakes to engage after the pedal is pressed
What types of liquids can be transported in a tanker?
Various liquids, including fuel, chemicals, and water
What is the minimum length allowed for double trailers?
28 feet for each trailer (varies by state)
What is the common type of combination vehicle?
Tractor-trailers
Describe the role of the Department of Transportation (DOT) in CDL regulations?
To regulate and oversee commercial driving standards
How can you check the air pressure in your brake system?
By using the air pressure gauge
What is the importance of using a surge control device in tankers?
To control the movement of liquid during transport
When pulling doubles or triples, which trailer should be the heaviest?
First.
Describe the importance of a clear view in combination vehicle operation.
To ensure proper visibility and safety
What is the difference between a Class A and Class B CDL?
Class A allows for combination vehicles; Class B is for single vehicles
What is a "spring brake" and how does it work?
A brake that uses a spring to hold the brakes in place
When liquid surges forward during braking, it can cause this dangerous situation?
The vehicle to push forward
What are the common challenges when driving triple trailers?
More challenging to maneuver and brake
When coupling a tractor to a trailer, the fifth wheel locking jaws should close around this part of the trailer kingpin?
The shank (the solid part just behind the head of the kingpin)
What is the weight of a vehicle that requires a CDL?
26,001 lbs or more
What are the signs of brake fade?
Reduced stopping power, smell of hot breaks
What are the regulations for transporting hazardous materials in a tanker?
Follow DOT regulations and placarding requirements
What is different for the inspection process for double and triple trailers compared to single trailer.
Same process with more trailers to look over.
How does the length of a combination vehicle affect maneuverability?
Longer vehicles require more space to turn
Name three types of vehicles covered under a CDL A license?
Tractor-trailers, Dump truck GVWR over 26,001lbs, Flat bed over 26,001lbs
What is the purpose of performing a break check?
To check for air leaks in the system
Before loading a tanker, you must make sure all outlets, inlets, and dome covers are in this condition?
Closed and secured
What is the importance of weight distribution in double and triple trailers?
Proper load distribution is essential for stability
What is the importance of communication with other drivers in combination vehicles?
Important for safe driving and preventing accidents