Workbook, Heavy Duty Truck Systems, 6E
Chapter Ten – Answer Key
1. What lights would be located on either side of a truck cab roof and at upper extremities of
a van trailer?
2. What component in an incandescent light bulb emits light?
3. What federal legislation covers the lighting standards required by all U.S.-built highway
trucks?
4. Which of the following types of light element would usually only be found in a headlight
assembly?
5. What are high-intensity discharge (HID) headlamps often known as?
6. How much voltage is required to maintain the arc in an HID light after the arc has been
ignited?
7. Which of the following conditions is most likely to cause a failure of an HID light
element?
8. Why are LED lighting systems becoming so popular in truck and trailer lighting systems?
9. When adjusting the aim of a truck headlamp assembly using a wall adjustment screen,
how far away from the wall should the truck be positioned?
10. In a standard seven-wire trailer connector cord, what does the brown color code
represent?