Perception is thus part of all human observation. This aspect of what is involved in observation is crucial to any efforts to use it as a method of. research. EXERCISE 1. Write down what kinds of factors may affect your perception of something you observe.
A GMC truck with a standard cab but a long bed is more than 18 1/2 feet in total length. A truck with a double cab and a regular bed is slightly more than 19 feet long. If a pickup has a larger crew cab with a standard box, the vehicle is about 20 feet long. However, if the truck has a crew cab with a short box, the entire length is a little more than 19 feet.
Trailer length either 48' or 53 (most are now 53') Tractors are measured using wheel base. Wheel base is center of the front axle to the center of the rear axle. A short, single axle, day cab (truck w/no sleeper) wheel base would be about 150 to 156. A larger truck, twin screw (two rear axles) with a sleeper would be in the 230 range.