Answer 3 free questions

ASE Maintenance & Light Repair: 3 free questions

Tap an answer to see if you're right and why, or switch to Timed and get scored at the end. Each answer is also under its question.

1. ASE G1 Auto Maintenance & Light Repair

   The primary purpose of the PCV (positive crankcase ventilation) system is to:

   ARoute crankcase blow-by vapors into the intake to be burned BIncrease fuel delivery pressure at high engine speed CCool the engine oil as it drains back to the crankcase DFilter the incoming air before it reaches the throttle body
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   Answer: A. Route crankcase blow-by vapors into the intake to be burned

   PCV uses manifold vacuum to draw blow-by gases from the crankcase and route them into the intake to be reburned, reducing emissions and preventing sludge and pressure buildup.

2. ASE G1 Auto Maintenance & Light Repair

   Two technicians discuss brake fluid. Technician A says DOT 3 and DOT 4 fluids absorb moisture over time, which lowers the boiling point. Technician B says brake fluid should be serviced periodically because absorbed moisture can cause internal corrosion. Who is correct?

   ATechnician A only BTechnician B only CBoth Technicians A and B DNeither Technician
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   Answer: C. Both Technicians A and B

   Both are right: glycol brake fluid is hygroscopic, so absorbed moisture lowers the boiling point and promotes corrosion, which is why periodic fluid service is specified.

3. ASE G1 Auto Maintenance & Light Repair

   A front-wheel-drive car makes a clicking or popping noise that gets louder when turning sharply under acceleration. The MOST likely cause is:

   AA worn timing belt BA worn outer CV joint CA slipping serpentine belt DA restricted cabin air filter
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   Answer: B. A worn outer CV joint

   Clicking that worsens on turns under power is the classic worn outer CV joint symptom, usually from a torn boot that let the grease escape.