16 Questions
What is the most common name for the combination vehicles made up of a powered semi-tractor and one or more semitrailers?
Semis
How many axles does the tractor unit typically have?
Two or three
What is the movable coupling called that is found on most tractor trucks?
Fifth-wheel trailer coupling
What is the cabover engine configuration like?
The driver sits next to or over the engine
Why was the cabover largely phased out of North American over-the-road (long-haul) service by 2007?
Difficult to service and limited access to the front of the engine
How much could a truck cost as of 25 May 2016?
$100,000
What is the fuel economy standard required by 2014?
7 miles per gallon
What is the power requirement for trucks at 55 mph?
170 hp
How many tires does the cargo trailer usually have?
10
Why is the term 'eighteen-wheeler' considered by some truckers to be a misnomer?
It's a nickname for a five-axle over-the-road combination.
What is used to connect the second of a set of doubles to the first trailer?
Converter gear known as a 'dolly'
What is common in the US when referring to the number of tires on a trailer?
Referring to the number of wheel hubs
What allows adjusting the weight distribution of many trailers?
Movable tandem axles
What may individual states further allow, in terms of vehicle size?
'Longer combination vehicles' (LCVs)
'Eighteen-wheeler' is a nickname for which type of over-the-road combination?
'Five-axle'
'Dolly' used for connecting trailers has a coupling for which part of the second trailer?
'Rear trailer'
Test your knowledge about the combination vehicles made up of a powered semi-tractor and one or more semitrailers, known by various names like 'semis', 'big rigs', or 'eighteen-wheelers'. Learn about the typical features and configurations of these tractor-trailers.
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