310T Steering and Suspension Systems Questions and Answers

Question 1

A heavy truck is experiencing "memory steer," where it continues to pull to one side after a turn is completed and requires manual correction to straighten out.
Which of the following is the MOST likely cause?

Accepted Answer

Worn or binding kingpins.

Answer

Excessive steering gear lash.

Answer

A failed power steering pump.

Answer

Incorrect front axle toe-in.

Question 2

A technician is diagnosing an air suspension system on a coach where the rear of the vehicle is sitting lower than the specified ride height. The system builds air pressure normally and there are no audible leaks. What is the MOST likely cause?

Accepted Answer

A misadjusted or faulty height control valve.

Answer

A leaking air spring.

Answer

A restricted air dryer.

Answer

Worn shock absorbers.

Question 3

During a pre-trip inspection, a driver notices excessive vertical (up-and-down) play when trying to move the pitman arm. What is the MOST probable cause of this movement?

Accepted Answer

Worn steering gear sector shaft splines or a loose pitman arm retaining nut.

Answer

Normal operation of the steering linkage.

Answer

Worn tie-rod ends.

Answer

Loose wheel bearings.

Question 4

Which of the following suspension components is primarily designed to control axle housing rotation (axle wrap) during acceleration and braking?

Accepted Answer

Torque rod

Answer

Leaf spring

Answer

Shock absorber

Answer

Sway bar

Question 5

A technician is performing a tandem axle alignment. They find that the rear drive axle is not perpendicular to the vehicle's centerline, causing the truck to "crab" or "dog track." What is this alignment condition called?

Accepted Answer

Thrust angle misalignment

Answer

Incorrect camber

Answer

Incorrect caster

Answer

Tandem scrub

Question 6

A truck exhibits excessive bouncing and a floating sensation after hitting bumps, and the tires show a "cupped" or "scalloped" wear pattern. Which components are MOST likely worn?

Accepted Answer

Shock absorbers

Answer

Kingpins

Answer

Tie-rod ends

Answer

Leaf spring center bolts

A heavy truck is experiencing "memory steer," where it continues to pull to one side after a turn is completed and requires manual correction to straighten out.Which of the following is the MOST likely cause?

A heavy truck is experiencing "memory steer," where it continues to pull to one side after a turn is completed and requires manual correction to straighten out.
Which of the following is the MOST likely cause?