UUS Practice Tests⌕ Search
Automotive Service · MIL5

ASE Suspension, Steering, and Hydraulics Practice Test

Suspension, steering, and hydraulic systems affect wheel control, ride response, and steering effort. The MIL5 practice material samples service decisions involving steering gears and linkages, suspension components, wheel and hub mounting, and hydraulic power steering. Questions frame common inspection findings and ask what a technician should check or repair first.

Exam overview

Exam providerNational Institute for Automotive Service Excellence
Exam codeMIL5
CategoryAutomotive Service

About the ASE Suspension, Steering, and Hydraulics Exam

Work with these scenarios by separating symptoms from likely causes and choosing checks that preserve safe, accurate diagnosis. Steering questions touch rack-and-pinion and recirculating-ball mechanisms, steering gear lash, rack bellows, and belt or hose condition. Suspension examples involve shock absorbers, stabilizer links, and track bars, with attention to how component wear can affect handling or vehicle stability. Wheel-related items ask about runout, mounting surfaces, and vibration that changes after tire rotation. Hydraulic steering decisions emphasize hose routing and securing, as well as recognizing belt slip under load. Practice explaining why a check comes before an adjustment or replacement, and connect each observed condition to its mechanical purpose and likely effect on vehicle operation.

Sample Practice Questions

Review a selection from this exam's published US Practice Tests practice bank.

Question 1

A vehicle’s steering wheel vibrates mainly at highway speeds, and the vibration changes after the front wheels are rotated. What should be checked first?

  1. AWheel and tire balance
  2. BPower steering fluid level
  3. CSteering gear adjustment
  4. DFront caster angle
Show answerCorrect answer: A

A speed-related vibration that changes when wheels are rotated commonly points to wheel-and-tire imbalance or a related wheel-and-tire issue. Balancing is a sensible initial check.

Question 2

A vehicle with a rack-and-pinion steering system has a torn steering rack bellows, but no other damage is found. What is the primary purpose of the bellows?

  1. ATo keep contaminants and moisture away from the rack and inner tie-rod area
  2. BTo provide hydraulic pressure to the steering gear
  3. CTo set the front wheel camber angle
  4. DTo limit steering-wheel rotation at full lock
Show answerCorrect answer: A

The rack bellows helps protect the rack and inner tie-rod area from dirt and moisture while accommodating steering movement. A torn boot should be addressed, and the protected components should be checked for contamination or damage.

Question 3

A technician measures front wheel runout and suspects that a wheel’s mounting surface is not seated flat against the hub. What should be checked first?

  1. AThe wheel and hub mating surfaces for debris, corrosion, or damage
  2. BThe power steering reservoir fluid level
  3. CThe rear shock absorber rebound rate
  4. DThe steering column tilt mechanism
Show answerCorrect answer: A

Rust, debris, or damage between the wheel and hub can prevent proper seating and create runout or vibration. Inspect and clean the mating surfaces as appropriate, then recheck using the specified procedure.

Question 4

A vehicle has a solid rear axle. What is the main role of a track bar, where fitted?

  1. ALimit side-to-side movement of the axle relative to the body
  2. BControl hydraulic steering assist pressure
  3. CSet the front wheel toe angle
  4. DPrevent the brake pedal from traveling too far
Show answerCorrect answer: A

A track bar, also called a lateral locating bar, helps locate a solid axle laterally relative to the vehicle body while allowing suspension travel.

Question 5

A power steering belt is visibly cracked and slips under load. What is the most appropriate repair approach?

  1. AReplace the belt and set its tension to the specified value
  2. BApply grease to the belt to reduce noise
  3. CIncrease steering-gear preload
  4. DOverfill the hydraulic reservoir
Show answerCorrect answer: A

A cracked belt can slip and may reduce pump drive, especially when steering demand is high. Replace a damaged belt and adjust tension to specification; excessive tension can damage bearings.

Question 6

A vehicle with hydraulic power steering has a damaged pressure hose. Why should the replacement hose be routed and secured as specified?

  1. ATo prevent contact with hot, moving, or sharp components and avoid hose damage
  2. BTo increase the steering gear’s mechanical advantage
  3. CTo set the vehicle’s front ride height
  4. DTo make the pump operate without fluid
Show answerCorrect answer: A

Correct routing and retention keep a pressurized hose away from heat sources, moving parts, and sharp edges that could cause abrasion, leaks, or sudden hose failure.

Question 7

During an inspection, a technician finds that a shock absorber is wet with a light film of oil but has no active dripping. What is the best next step?

  1. ADetermine whether the film is a normal residue or evidence of leakage using the maker’s inspection criteria
  2. BReplace every shock absorber on the vehicle immediately
  3. CTighten the shock absorber rod until the oil film disappears
  4. DAdd hydraulic fluid through the shock absorber body
Show answerCorrect answer: A

A light film can be residue rather than a failed shock, so the condition should be assessed using the applicable inspection criteria and the component’s performance. Active leakage or poor damping may indicate replacement is needed; shocks are not normally serviced by adding fluid in place.

How to use this practice test

Access is free. A practice session draws up to 20 random questions from the available 50-question bank and displays results after you finish. Use missed or uncertain items to identify whether you need to revisit steering mechanism functions, suspension effects, wheel inspection, or hydraulic component service decisions.

Preparation tips

  • For steering gear questions, distinguish rack-and-pinion parts from recirculating-ball components and relate each part to its mechanical function.
  • When evaluating steering vibration, compare the symptom with wheel balance, runout, mounting-surface condition, and changes after wheel rotation before selecting a repair.
  • Review how track bars and stabilizer links locate or connect suspension components, and identify the handling effects associated with looseness or wear.
  • For hydraulic power steering, inspect belt condition and hose damage; account for specified routing, clearance, and securement when considering replacement.
  • Separate a light oil film on a shock absorber from active leakage, and base the next inspection step on the severity of the observed condition.
Official sourceOfficial exam page ↗