Question 1

Composite headlights are being discussed. Technician A says they have replaceable bulbs. Technician B says a cracked or broken lens will prevent the operation of a composite headlamp. Who is correct?

Accepted Answer

Technician A is correct because composite headlights are designed with replaceable bulbs, allowing for easy maintenance without needing to replace the entire headlight assembly. Technician B is incorrect because a cracked or broken lens, while it may affect the light's effectiveness or cause it to fail an inspection, does not prevent the operation of the composite headlamp itself; the light can still function.

Question 2

Which of the following statements regarding high-intensity discharge headlamps is false?

Accepted Answer

High-intensity discharge (HID) headlamps do not come on instantly; they require a few seconds to reach full brightness. This is in contrast to halogen bulbs, which do illuminate instantly.

Question 3

Technician A says on all vehicles, the fuse that protects the backup light system is the same fuse that protects the turn signal system. Technician B says vehicles equipped with automatic transmissions use a combination backup/neutral start switch. Who is correct?

Accepted Answer

Technician B is correct because vehicles with automatic transmissions often use a combination backup/neutral start switch, which serves dual functions including activating the backup lights when in reverse and ensuring the vehicle can only be started in park or neutral. Technician A is incorrect because the fuse protecting the backup light system is not universally the same as the one protecting the turn signal system; this can vary by vehicle design.

Question 4

Technician A says HID (xenon)headlights on vehicles sold in Europe must be self-leveling and equipped with washers. Technician B says HID headlights produce more heat and use more electricity than halogen headlights. Who is correct?

Accepted Answer

Technician A is correct because in Europe, regulations require HID (xenon) headlights to be self-leveling and equipped with headlight washers to prevent glare that could affect other drivers. Technician B is incorrect because HID headlights actually produce less heat and use less electricity than halogen headlights, making them more efficient.

Question 5

Technician A says blinking headlights can be caused by the self-resetting circuit breaker installed between battery and the headlight switch, that is kicking out due to a short. Technician B says flickering vehicle lights can be caused by a loose electrical connection. Who is correct?

Accepted Answer

Both technicians are correct. Technician A is correct in stating that a self-resetting circuit breaker can cause headlights to blink if it's kicking out due to a short, indicating an issue in the electrical circuit. Technician B is correct in stating that flickering vehicle lights can be caused by a loose electrical connection, which can disrupt the flow of electricity to the lights.

Question 6

Standard sealed beams are typically filled with ______.

Accepted Answer

Standard sealed beams are typically filled with argon, which is an inert gas that helps prevent oxidation and extends the life of the filament.

Question 7

The light-sensitive photocell sensor/amplifier of an automatic light system is located ______.

Accepted Answer

The light-sensitive photocell sensor/amplifier of an automatic light system is typically located within the upper instrument panel pad to detect changes in ambient light levels and adjust the vehicle's lighting system accordingly.

Question 8

Which of the following is NOT a basic type of headlight used in today's vehicles?

Accepted Answer

Acetylene headlights are not used in today's vehicles; they were used in the early 20th century. Modern vehicles use sealed beam, composite, and high-intensity discharge (HID) headlights.

Question 9

The stoplight switch is normally mounted on the ______.

Accepted Answer

The stoplight switch is typically mounted on the brake pedal arm. This placement allows the switch to activate the brake lights when the brake pedal is pressed.

Question 10

Technician A says the condition of the vehicle's springs and shocks should be checked before aligning the headlamps. Technician B says the vehicle should have a full tank of fuel when its headlamps are being adjusted. Who is correct?

Accepted Answer

Technician A is correct because the condition of the vehicle's springs and shocks can affect the alignment of the headlamps.

Question 11

Technician A says a lamp may contain only one filament. Technician B says some lamps contain two filaments. Who is correct?

Accepted Answer

Both technicians are correct. Some lamps, like those used for basic lighting, contain only one filament, while others, such as dual-beam headlamps in vehicles, contain two filaments for different functions (e.g., high and low beam).

Question 12

Technician A says some condensation on the inside of a sealed beam headlamp is normal. Technician B says the buildup of black spots on the lens of a sealed beam headlamp decreases the brightness of the headlamp. Who is correct?

Accepted Answer

The answer of Technician A says some condensation on the...

Question 13

Technician A says on some vehicles, if the turn signals blink faster than normal, the problem may be a burned out bulb. Technician B says on some vehicles, if the turn signals don't blink at all, the problem may be a burned out bulb. Who is correct?

Accepted Answer

Both technicians are correct. A faster blinking rate often indicates a burned-out bulb by increasing the load on the remaining bulbs, while a complete lack of blinking can also suggest a bulb issue, among other potential causes, such as a faulty relay or fuse.

Question 14

Technician A says non-composite halogen light systems do not have removable bulbs. Technician B says some composite headlamp housings are vented. Who is correct?

Accepted Answer

Both statements are true. Non-composite halogen light systems do not have removable bulbs, and some composite headlamp housings are vented.

Question 15

Which tool is used to diagnose automatic leveling headlight problems?

Accepted Answer

A scan tool is used to diagnose automatic leveling headlight problems as it can communicate with the vehicle's computer systems to identify and troubleshoot issues related to the headlight leveling system.

Question 16

Technician A says the brake light switch receives voltage from the ignition switch. Technician B says when there is light pressure on the brake pedal, the brake lights will be dim. Who is correct?

Accepted Answer

The brake light switch typically receives voltage from the battery or fuse box, not the ignition switch. Brake lights are either on or off; they do not dim with light pressure.

Question 17

Technician A says vanity lights are on whenever the headlamps are on. Technician B says most trunk lights are on whenever the headlamps are on. Who is correct?

Accepted Answer

Vanity lights, typically found in sun visors or rearview mirrors, are controlled independently and are not linked to the headlamp system. Trunk lights are designed to illuminate the trunk area when it is opened, regardless of the headlamp status, not when the headlamps are on.

Question 18

A technician is diagnosing an HID headlight that intermittently turns on and off. Technician A says the problem is a worn out HID arc tube{bulb]. Technician B says the problem is a blown headlight fuse. Who is correct?

Accepted Answer

Technician A is correct because a worn-out HID arc tube (bulb) can cause intermittent operation of the headlight. HID bulbs can fail in a way that allows them to work sporadically before they completely stop working. Technician B's suggestion of a blown fuse would not cause intermittent operation; if the fuse were blown, the headlight would not work at all.

Question 19

Which of the following statements concerning LED headlights is NOT true?

Accepted Answer

LEDs do not contain mercury, which is a significant advantage they have over some other types of lighting that can be toxic and environmentally unfriendly.

Question 20

Technician A uses a powered test light to check a lightbulb. Technician B uses an ohmmeter. Who is correct?

Accepted Answer

Both technicians are correct because a powered test light can be used to check for power and ground at the light socket, indicating if the bulb can receive power, while an ohmmeter can be used to check the continuity of the bulb itself, determining if the filament is intact.

Quiz 20: Lighting Systems