109
Chapter 33
End of Chapter Review Questions Answer Key
1. What is the standard loading dock height used in trucking operations?
2. Technician A says that a damaged floor in a unibody van trailer should be
immediately repaired because the floor forms part of the frame. Technician B says
that an out-of-square door frame on a unibody van trailer can indicate problems with
the structural integrity of the vehicle. Who is correct?
3. What is the function of a hubdometer?
4. Which of the following is a measure of the cooling capacity of a reefer?
5. What is the major difference between a straight platform and a low-bed trailer?
6. How many pivot points are there in an A-train combination?
7. What is the difference between trailer-specific tires and tractor tires?
110
8. How many pivot points are there in a B-train combination?
9. What wire color code does power line carrier multiplexing communications use?
10. What type of trailer design is most commonly seen on our roads?
11. What procedure tends to cause most landing gear damage?
12. Technician A says that in an ATA 7-wire trailer cord, the color green is used for
marker lights. Technician B says that the color white is used for chassis ground. Who
is correct?
13. Which type of refrigerant could be legally used in some trailer reefer systems but not
in a tractor system?
14. What is the usual maximum permitted width for a trailer operated on the highway?
15. Which of the following must be used to couple a semi-trailer to a tractor?
111
16. Which of the following devices will convert a semi-trailer into a full-trailer?
17. Which of the following train configurations would be made up of two semi-trailers?
18. Which of the following train configurations would have to be equipped with a pintle
hook?
19. Which of the following terms would best describe the frame used on a typical van-
type trailer?
20. Which component on a trailer upper coupler locks to the jaws of the fifth wheel on the
tow vehicle?