Question

the parallelogram steering system gets its name because:
a. the center link and the idler arm run parallel to each other.
b. the pitman arm and the axle always run parallel to each other.
c. the wheels run parallel to each other.
d. the pitman and idler arms run parallel to each other.

Explanation:

The parallelogram steering system is named for its parallelogram-shaped linkage, formed by the pitman arm, idler arm, center link, and tie rods. A key defining feature is that the pitman arm and idler arm are parallel to one another, maintaining the parallelogram structure during steering.

Answer:

d. The pitman and idler arms run parallel to each other.