Question

16.) a vehicles headlight beam cannot be brought into alignment. this could be caused by:
a. improperly installed halogen elements.
b. a faulty headlamp switch.
c. lamps that are too bright.
d. a faulty dimmer switch.

Explanation:

A faulty headlamp switch would affect the operation of the headlamp (like turning it on/off) rather than its alignment. Bright lamps don't cause mis - alignment. A dimmer switch affects the brightness level. Improperly installed halogen elements (which are part of the headlamp assembly) can lead to mis - alignment of the headlight beam.

Answer:

A. improperly installed halogen elements.