ASE G1 Maintenance & Light Repair: Key Concepts & Practice
#2
A vehicle's air conditioner blows cold air while driving at normal speeds, but warm while sitting at stop
lights. The LEAST likely cause of this condition is:
A. An overheating engine.
B. A weak electric fan motor.
C. A frozen expansion valve.
D. Debris in the condenser fins. - correct answer ✔✔Answer C is correct. This is a least likely type
question. Once the expansion valve freezes, the air conditioner would have poor performance at all
speeds.
A technician runs a scan and receives a fault code indicating a problem in the MAF sensor circuit.
Technician A says this could be caused by a loose wire or an intermittent open. Technician B says this
could be caused by a faulty MAF sensor. Who is correct?
A. Technician A
B. Technician B
C. Both A and B
D. Neither A or B - correct answer ✔✔Answer C is correct. Both technicians are correct.
A vehicle blows blue gray exhaust from its tailpipe only when first started in the morning. The MOST
likely cause of this condition is:
A. Worn piston rings.
B. A lean fuel condition.
C. A leaking fuel injector.
D. Leaking valve seals. - correct answer ✔✔Answer D is correct. A leaking valve seal will cause oil to leak
into the cylinder's chamber over time, usually overnight, resulting in blue gray exhaust at first start.
#2
A vehicle's air conditioner blows cold air while driving at normal speeds, but warm while sitting at stop
lights. The LEAST likely cause of this condition is:
A. An overheating engine.
B. A weak electric fan motor.
C. A frozen expansion valve.
D. Debris in the condenser fins. - correct answer ✔✔Answer C is correct. This is a least likely type
question. Once the expansion valve freezes, the air conditioner would have poor performance at all
speeds.
A technician runs a scan and receives a fault code indicating a problem in the MAF sensor circuit.
Technician A says this could be caused by a loose wire or an intermittent open. Technician B says this
could be caused by a faulty MAF sensor. Who is correct?
A. Technician A
B. Technician B
C. Both A and B
D. Neither A or B - correct answer ✔✔Answer C is correct. Both technicians are correct.
A vehicle blows blue gray exhaust from its tailpipe only when first started in the morning. The MOST
likely cause of this condition is:
A. Worn piston rings.
B. A lean fuel condition.
C. A leaking fuel injector.
D. Leaking valve seals. - correct answer ✔✔Answer D is correct. A leaking valve seal will cause oil to leak
into the cylinder's chamber over time, usually overnight, resulting in blue gray exhaust at first start.
