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Chapter 01—Introduction to Servicing Heavy-Duty Trucks
1. What is the minimum truck class rating required to haul a load of 34,000 pounds?
2. Which of the GVW categories would a Class 6 truck be rated at?
3. Which of the following types of clutches are used in heavy-duty truck powertrains?
4. Which of the following truck configurations has a single drive axle?
5. How is the wheel base measured on a tandem axle truck?
Forward edge of the front tire to the rear edge of the rear tandem tire
Center of the front tire to the center of the rear tandem tire
From the centerline of the front wheel to the centerline of the tandem spread
6. What is the maximum number of forward gear ratios that have been used in highway heavy-duty truck transmissions?
7. Which of the statements about brake systems used on heavy-duty trucks is NOT true?
Class 8 trucks use air brake systems
Current production trucks and trailers are equipped with ABS
Disc brakes are not used on heavy duty trucks
Some class 7 trucks have air-over-hydraulic brakes
8. Technician A says that most current Class 8 trucks use power-assisted steering. Technician B says that rack and pinion
steering is a recent introduction in trucks. Who is correct?
Chapter 01—Introduction to Servicing Heavy-Duty Trucks
9. Which of these organizations conducts a certification program for truck technicians?
10. Which of the following terms describes a trucking operation that runs goods from terminal to terminal?
11. Which ASE certification test qualifies truck technicians to work on air brake systems?
12. Which of the following is not mounted on an axle?
13. Which of the following is NOT a type of vehicle retarder?
transmission hydraulic retarder
14. Which of the following components couples a trailer to a tractor fifth wheel?
15. Which of the following components is used to transfer torque from the transmission to the driveshaft?
16. What component is used in drivelines to allow torque transfer between two drive components on different planes?
17. Which ASE test certifies technicians to work on truck electrical systems?
d
Chapter 01—Introduction to Servicing Heavy-Duty Trucks
18. If a technician holds ASE T5 certification, what is he or she certified to work on?
suspension and steering systems
19. What is another way of describing an ‘independent trucker’?
20. Which of the following is a major advantage of a truck air suspension system?
adjusts from loaded to unloaded states
21. How many tires would be found on a typical tandem drive, highway tractor?
22. What is the advantage of using two or three countershafts in a heavy-duty truck transmission?
divides torque reducing stress on gears
increases overall transmission length
23. If a truck is described as a tandem drive, highway tractor, how many axles does it have?
24. What is the front of a trailer sometimes known as?
25. Which of the following correctly describes GVW?
weight of the vehicle and its load
weight of the vehicle minus its load
26. Which of the following truck brand names is owned by Paccar?
Chapter 01—Introduction to Servicing Heavy-Duty Trucks
27. Which of the following acronyms is used to describe the overall length of a tractor-semi trailer combination?
28. What is another way of saying ‘computer–controlled’?
hydromechanically managed
29. Approximately what percentage of total freight volume is handled by trucks nationwide?
30. Which of the following occupations in the truck service industry has an ASE certification test?
medium/heavy duty parts specialist
31. If a standard 6X4 highway tractor is converted from duals to wide base singles on the drive axles, how many tires
would the unit have in total?
32. If what is known as a standard 18-wheeler has its duals replaced by wide-base singles throughout the rig, what would
be the total number of tires?
33. Which of the following accounts for an increase in auxiliary HVAC systems on late model trucks?
Drivers are not as hardy today
Anti-idling legislation in some areas
Diesel fuel today has more sulfur
Drivers sleep better without the engine noise
34. Which ASE certification category qualifies transit bus technicians?
Chapter 01—Introduction to Servicing Heavy-Duty Trucks
35. Technician A says that an ASE certified truck technician is eligible to join the ATA Technology and Maintenance
Council (TMC) as a technician member. Technician B says that two years of hands-on experience are required to be
eligible to take ASE certification tests? Who is correct?
36. Which of the following would be associated with shorepower/hotel loads?
37. Which of the following terms refers to the tracking, moving, storing, and delivery of cargo?
38. Which of the following terms would be used to classify a fire truck?
39. What domestically sourced alternate fuel, is widely use in transit bus applications, especially on the West coast?
40. Technician A says that diesel electric hybrid drive systems are suited to inner city, stop-start applications. Technician
B says that a diadvantage of diesel electric hybrid drive systems increase emissions. Who is correct?