DFFT Steering and Suspension 2

Question 1

A vehicle's power steering becomes heavy and difficult to turn at low speeds. What should be checked?

Accepted Answer

Power steering fluid level and the drive belt condition

Answer

Low power steering fluid or a slipping drive belt reduces the hydraulic pump's ability to generate sufficient pressure to assist steering at low speeds.

Question 2

A vehicle produces a whining noise that varies with engine speed when turning the steering wheel. What is the cause?

Accepted Answer

A low power steering fluid level causing the pump to cavitate

Answer

When the power steering reservoir is low, the pump draws air along with fluid, causing cavitation that produces a whining or groaning noise that changes with pump speed.

Question 3

Cupped or scalloped wear appears on all four tires. What suspension component is the most likely cause?

Accepted Answer

Worn or failed shock absorbers allowing excessive wheel bounce

Answer

Worn shock absorbers allow uncontrolled wheel hop, causing the tires to periodically bounce away from the road surface and create uneven scalloped wear patterns.

Question 4

A vehicle dips severely at the front during braking and squats at the rear during acceleration. What is the most likely cause?

Accepted Answer

Worn front and rear shock absorbers or struts

Answer

Shock absorbers dampen spring movement; worn dampers allow excessive body motion, leading to nose dive under braking and squat under acceleration.

Question 5

During a vehicle inspection you find a torn outer CV joint boot with grease flung around the area. What must be done?

Accepted Answer

Replace the CV joint boot and inspect the joint for damage and repack with grease

Answer

A torn CV boot allows contamination to enter the joint and grease to escape; the joint must be inspected for damage and repacked before a new boot is installed.

DFFT - Driver Fault Finding Test Practice Test

DFFT - Driver Fault Finding Test Practice Test

DFFT Steering and Suspension 2