Is the front part of truck that includes engine and cab is tractor?

That's a good question! While the term "tractor" is often used to describe the front part of a truck that includes the engine and cab, it's not technically correct.

Here's why:

* Tractor usually refers to a separate vehicle used for pulling trailers or implements. These tractors are designed for farm work, construction, or hauling.

* Semi-trailer trucks are composed of two main parts: a tractor unit and a semi-trailer.

So, the front part of a semi-trailer truck is more accurately called the tractor unit or cab-over-engine (COE).

Here's a breakdown:

* Tractor unit: The front part of a semi-trailer truck, including the engine, cab, and front axles.

* Semi-trailer: The rear part of a semi-trailer truck, which carries the cargo and has its own axles.

While "tractor" is commonly used in everyday language to refer to the front part of a semi-trailer truck, it's important to be aware of the correct terminology.