Fifth Wheel Coupling Flashcards
1
Q
What is a tractive unit also known as ?
A
Also known as a prime mover , head unit or tractor unit
2
Q
What is a semi trailer?
A
Trailer that connects to a tractive unit by a fifth wheel
3
Q
What is the purpose of a fifth wheel coupling?
A
Used on vehicles with a minimum unladen weight in excess of 2 tonnes
4
Q
What does a fifth wheel coupling allow ?
A
The tractive unit and semi trailer to be coupled then pivot round the tractive unit
5
Q
What are the advantages of a fifth wheel coupling?
A
More manoeuvrable
Smaller Turning circle
Economical to operate
6
Q
What is the most common type of fifth wheel coupling?
A
Hook and wedge , only 2 principle parts
7
Q
What is the hook and wedge manufactured from?
A
High tensile manganese steel
