Filters
Question type
Study Flashcards

Which of the following have lowered the electrical current load and reduced maintenance downtime on trailer wiring systems?


A) LED lighting
B) modular wiring
C) plug-in connectors
D) all of the above

E) B) and D)
F) A) and B)

Correct Answer

verifed

verified

To which of the following assemblies is a kingpin either welded or bolted?


A) upper coupler
B) lower coupler
C) fifth wheel
D) drawbar eye

E) B) and C)
F) None of the above

Correct Answer

verifed

verified

What does the eye on a drawbar connect to?


A) upper coupler
B) lower coupler
C) fifth wheel
D) pintle hook

E) All of the above
F) A) and B)

Correct Answer

verifed

verified

Which of the following values would represent typical maximum cooling capacity of a refrigerated van?


A) 12,000 Btu (12,660 kj)
B) 14,000 Btu (14,770 kj)
C) 18,000 Btu (18,991 kj)
D) 25,000 Btu (26,376 kj)

E) B) and C)
F) B) and D)

Correct Answer

verifed

verified

What is the maximum height permitted on any highway truck or trailer operated in the USA,Mexico,or Canada?


A) 10 feet 8 inches (3.25 meters)
B) 12 feet 6 inches (3.81 meters)
C) 13 feet 6 inches (4.11 meters)
D) 14 feet 8 inches (4.47 meters)

E) B) and D)
F) B) and C)

Correct Answer

verifed

verified

When a refrigerated trailer is divided into three compartments,each managed at a different temperature,which of the following is required?


A) separate reefer unit for each compartment
B) separate condenser for each compartment
C) separate evaporator for each compartment
D) separate computer for each compartment

E) A) and B)
F) C) and D)

Correct Answer

verifed

verified

Technician A says that power line carrier (PLC) permits multiplexing to take place between a trailer and the tractor data bus on a non-dedicated wire.Technician B says that PLC messages are RF-superimposed over the blue 12-volt auxiliary power supply between the tractor and trailer.Who is correct?


A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

E) B) and D)
F) None of the above

Correct Answer

verifed

verified

Which of the following AWG wiring sizes is the minimum that should ever be used on any trailer light circuit?


A) 12 gauge
B) 16 gauge
C) 18 gauge
D) 20 gauge

E) None of the above
F) B) and C)

Correct Answer

verifed

verified

Which of the following differentiates a D-train combination from other multi-trailer highway trains?


A) articulation between the lead and pup is removed
B) articulation between the tractor and lead trailer is removed
C) three points of articulation
D) two points of articulation

E) B) and C)
F) All of the above

Correct Answer

verifed

verified

If a trailer is equipped with a service brake priority air system and all its reservoirs are empty,which of the following must occur before the trailer brakes can be released?


A) all service chambers must be charged
B) air tanks must be charged to 60 psi before the hold-off circuit is charged
C) the service signal circuit must be activated
D) spring brakes over one axle must be caged

E) A) and B)
F) None of the above

Correct Answer

verifed

verified

What is the function of a trailer pressure protection valve?


A) maintain reservoir pressure
B) maintain pressure in the service line
C) maintain pressure in the supply line
D) maintain pressure in the brake chamber

E) B) and D)
F) None of the above

Correct Answer

verifed

verified

Which type of trailer floor design would be most suitable for use in a refrigerated trailer?


A) duct-type floor
B) T-bar-type floor
C) hybrid T-bar duct
D) ship lapped,laminated oak

E) A) and D)
F) B) and D)

Correct Answer

verifed

verified

Showing 61 - 72 of 72

Related Exams

Exam 1

Introduction to Servicing Heavy-Duty Trucks

40 Questions

Exam 2

Shop Safety and Operations

30 Questions

Exam 3

Tools and Fasteners

39 Questions

Exam 4

Preventive Maintenance Program

40 Questions

Exam 5

Fundamentals of Electricity

56 Questions

Exam 6

Fundamentals of Electronics and Computers

50 Questions

Exam 7

Batteries

52 Questions

Exam 8

Charging Systems

35 Questions

Exam 9

Cranking Systems

32 Questions

Exam 10

Chassis Electrical Circuits

50 Questions

Exam 11

Diagnosis and Repair of Electronic Circuits

50 Questions

Exam 12

Multiplexing

60 Questions

Exam 13

Hydraulics

52 Questions

Exam 14

Clutches

45 Questions

Exam 15

Standard Transmissions

52 Questions

Exam 16

Standard Transmission Servicing

40 Questions

Exam 17

Torque Converters

30 Questions

Exam 18

Automatic Transmissions

42 Questions

Exam 19

Automatic Transmission Maintenance

32 Questions

Exam 20

Electronically Automated Standard Transmissions

40 Questions

Exam 21

Electronically Controlled Automatic Transmissions Ecats

57 Questions

Exam 22

Driveshaft Assemblies

50 Questions

Exam 23

Heavy-Duty Truck Axles

40 Questions

Exam 24

Heavy-Duty Truck Axle Service and Repair

42 Questions

Exam 25

Steering and Alignment

55 Questions

Exam 26

Suspension Systems

50 Questions

Exam 27

Wheels and Tires

65 Questions

Exam 28

Truck Brake Systems

100 Questions

Exam 29

Hydraulic Brakes and Air-Over-Hydraulic Brake Systems

30 Questions

Exam 30

Abs and Ebs

45 Questions

Exam 31

Air Brake Servicing

56 Questions

Exam 32

Vehicle Chassis Frame

42 Questions

Exam 34

Fifth Wheels and Coupling Systems

45 Questions

Exam 35

Heavy-Duty Heating, ventilation, and Air Conditioning Systems

65 Questions

Show Answer