Heavy Duty Truck Systems – Chapter 10 – Review Questions & Answer
Practice Sheet
When an incandescent light bulb is energized in an electrical circuit, what is electrical energy
converted to? - correct answer ✔✔Heat and Light
What is the function of a headlamp dimmer switch - correct answer ✔✔switches headlamps
between separate low and high beam circuits
What type of headlight fires an arc through gas to produce light energy - correct answer ✔✔HID
Which of the following best explains the construction of a halogen headlamp element - correct
answer ✔✔Tungsten filament encased in a quartz tube
How much voltage is required to sustain the arc in a typical HID headlamp assembly - correct
answer ✔✔Around 85 Volts
Which of the following best describes light energy - correct answer ✔✔Photons
Which of the following would be used to switch turnlights on a truck chassis - correct answer
✔✔Stalk switch
How many contacts are in a typical tractor to trailer electrical connector - correct answer ✔✔7
What color code is used for the brake light circuit in a truck trailer electrical connector - correct
answer ✔✔Red
Practice Sheet
When an incandescent light bulb is energized in an electrical circuit, what is electrical energy
converted to? - correct answer ✔✔Heat and Light
What is the function of a headlamp dimmer switch - correct answer ✔✔switches headlamps
between separate low and high beam circuits
What type of headlight fires an arc through gas to produce light energy - correct answer ✔✔HID
Which of the following best explains the construction of a halogen headlamp element - correct
answer ✔✔Tungsten filament encased in a quartz tube
How much voltage is required to sustain the arc in a typical HID headlamp assembly - correct
answer ✔✔Around 85 Volts
Which of the following best describes light energy - correct answer ✔✔Photons
Which of the following would be used to switch turnlights on a truck chassis - correct answer
✔✔Stalk switch
How many contacts are in a typical tractor to trailer electrical connector - correct answer ✔✔7
What color code is used for the brake light circuit in a truck trailer electrical connector - correct
answer ✔✔Red
