Question About The Online CDL Training Program - Specialized Exams "Combination Vehicle"

Topic 27077 | Page 1

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KeepingOn's Comment
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(The concepts are simple, but I don't want to get tripped up on the wording, so looking for clarification on this.)

In "Driver's License Classifications - Page 2"...

Part 1.5 says a Class A CDL is for "Combination vehicles - GCWR* of 26,001 or more ..."

Part 1.6 lists seven special endorsements and one restriction that require testing:

C - Charter Bus X - Combination Tank and Hazardous T - Double/Triple Trailers P - Passenger S - School Bus N - Tank H - Hazardous L-Restriction - Air Brakes

But in part 1.7, it lists the optional specialized exams as only: air brakes, combination vehicle , double/triple, hazardous, passenger, school bus, tanker. Charter Bus isn't listed ... I assumed it was just left off as the list wasn't meant to be complete. I also assumed that "combination vehicle" meant the "Combination Tank and Hazardous" special endorsement previously listed in Part 1.6 and not the general "Combination Vehicle" term as used in Part 1.5 for a Class A license.

But then I got confused when the quiz gave this question: "Which written exams must be taken in order to drive a single-trailer combination vehicle exceeding 26,001 pounds equipped with air brakes?" with the correct answer being "General Knowledge, Air Brakes, Combination Vehicles".

So do we assume anytime "combination" is used in a test that it means "combination tank and hazardous"? Or is it that "single-trailer" already implies the CDL Class A description "combination vehicle" so the further use of "combination" after it can only be referring to "combination tank and hazardous" otherwise it would be redundant?

If "combination vehicle" is used on the actual CDL test, do I assumed it means the "combination tank and hazardous" or just a normal tractor-trailer combo?


Commercial Driver's License (CDL)

A CDL is required to drive any of the following vehicles:

  • Any combination of vehicles with a gross combined weight rating (GCWR) of 26,001 or more pounds, providing the gross vehicle weight rating (GVWR) of the vehicle being towed is in excess of 10,000 pounds.
  • Any single vehicle with a GVWR of 26,001 or more pounds, or any such vehicle towing another not in excess of 10,000 pounds.
  • Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver.
  • Any vehicle required by federal regulations to be placarded while transporting hazardous materials.

Combination Vehicle:

A vehicle with two separate parts - the power unit (tractor) and the trailer. Tractor-trailers are considered combination vehicles.


Gross Combined Weight Rating

The GCWR refers to the total weight of a vehicle, including all trailers.

Delco Dave's Comment
member avatar

I am studying the PA manual and the High road program also. GCWR is the gross combined weight rating. This is a general term referring to the tractor(truck) and what ever it is towing(trailer). Not a specific endorsement like a tanker/hazmat


Hazardous Materials

Explosive, flammable, poisonous or otherwise potentially dangerous cargo. Large amounts of especially hazardous cargo are required to be placarded under HAZMAT regulations


Gross Combined Weight Rating

The GCWR refers to the total weight of a vehicle, including all trailers.


Operating While Intoxicated

Errol V.'s Comment
member avatar

Check your definitions:

Combination Vehicle : A combination vehicle is two or more vehicles put together, like a tractor (technical term for the power unit) and a trailer. Yes, a trailer is a vehicle. This definition has nothing to do with hazardous material.

Bus: The P endorsement is needed to operate any vehicle that seats 16 or more people, including the driver. The difference between a "regular" bus and a School Bus is that a school bus carries our babies so you need that "S" endorsement as well.

Combination Vehicle:

A vehicle with two separate parts - the power unit (tractor) and the trailer. Tractor-trailers are considered combination vehicles.

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