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FUEL SYSTEMS TEST 1 Questions with Detailed Verified
Answers
Main bearing wear is being discussed. Technician A says a heavy thumping knock at irregular
intervals during acceleration may be caused by worn main thrust bearings.
Technician B says this noise indicates loose or worn main bearings
Who is correct? Ans: ✓ ✓ ✓ A only
Technician A says the vacuum test is one of those quick and easy tests that can tell you a lot about
the engine.
Technician B says the vacuum test measures the sealing ability of the engine.
Who is correct? Ans: ✓ ✓ ✓ Both A and B
A vacuum leak is suspected for a rough idle concern. Using a five-gas infrared exhaust analyzer,
Technician A says O2 will be higher than normal.
Technician B says CO will be higher than normal.
Who is correct? Ans: ✓ ✓ ✓ A only
A restricted exhaust may cause any of the following except Ans: ✓ ✓ ✓ faster than normal idle
speed
Technician A says that catalytic converter operation can be confirmed by the delta temperature test.
Technician B says that the converter operation can be confirmed by an exhaust gas analyzer.
Who is correct? Ans: ✓ ✓ ✓ Both A and B
Turbochargers are being discussed. Technician A says that worn shaft seals can be indicated by
bluish-white smoke in the exhaust.
Technician B says that a clogged PCV valve can cause leakage at the shaft seals.
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Who is correct? Ans: ✓ ✓ ✓ Both A and B
A turbocharger with too little boost may be a result of Ans: ✓ ✓ ✓ All of the above
A turbocharged engine has a burned piston from extreme heat. This may be caused by Ans: ✓ ✓ ✓
excessive turbocharger boost pressure
Technician A says that the fuel pump should run for a couple of seconds when the key is turned on.
Technician B says that if the pump is running and there is no fuel pressure, try adding some fuel to
the tank and see if it starts.
Who is correct? Ans: ✓ ✓ ✓ Both A and B
Technician A says that PO441 through PO445 cover purge valve operation.
Technician B says that OBD II systems have no codes for the evaporative emissions system.
Who is correct? Ans: ✓ ✓ ✓ A only
Technician A says that the fuel tank pressure sensor is much like an MAF sensor.
Technician B says that the FTP sensor measures fuel pressure from the fuel pump.
Who is correct? Ans: ✓ ✓ ✓ Neither A nor B
Technician A says it is recommended that you wear shoes with nonslip soles in the shop.
Technician B says shoes worn in the shop should have steel toes.
Who is correct? Ans: ✓ ✓ ✓ Both A and B
Technician A ties his long hair behind his head while working in the shop.
Technician B covers her long hair with a brimless cap.
Who is correct? Ans: ✓ ✓ ✓ Both A and B
Technician A uses compressed air to blow dirt from his clothes and hair.
Technician B says this should only be done outside Ans: ✓ ✓ ✓ Neither A nor B
© Get it right 2025 Getaway - Stuvia US All rights reserved
FUEL SYSTEMS TEST 1 Questions with Detailed Verified
Answers
Main bearing wear is being discussed. Technician A says a heavy thumping knock at irregular
intervals during acceleration may be caused by worn main thrust bearings.
Technician B says this noise indicates loose or worn main bearings
Who is correct? Ans: ✓ ✓ ✓ A only
Technician A says the vacuum test is one of those quick and easy tests that can tell you a lot about
the engine.
Technician B says the vacuum test measures the sealing ability of the engine.
Who is correct? Ans: ✓ ✓ ✓ Both A and B
A vacuum leak is suspected for a rough idle concern. Using a five-gas infrared exhaust analyzer,
Technician A says O2 will be higher than normal.
Technician B says CO will be higher than normal.
Who is correct? Ans: ✓ ✓ ✓ A only
A restricted exhaust may cause any of the following except Ans: ✓ ✓ ✓ faster than normal idle
speed
Technician A says that catalytic converter operation can be confirmed by the delta temperature test.
Technician B says that the converter operation can be confirmed by an exhaust gas analyzer.
Who is correct? Ans: ✓ ✓ ✓ Both A and B
Turbochargers are being discussed. Technician A says that worn shaft seals can be indicated by
bluish-white smoke in the exhaust.
Technician B says that a clogged PCV valve can cause leakage at the shaft seals.
© Get it right 2025 Getaway - Stuvia US All rights reserved
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Who is correct? Ans: ✓ ✓ ✓ Both A and B
A turbocharger with too little boost may be a result of Ans: ✓ ✓ ✓ All of the above
A turbocharged engine has a burned piston from extreme heat. This may be caused by Ans: ✓ ✓ ✓
excessive turbocharger boost pressure
Technician A says that the fuel pump should run for a couple of seconds when the key is turned on.
Technician B says that if the pump is running and there is no fuel pressure, try adding some fuel to
the tank and see if it starts.
Who is correct? Ans: ✓ ✓ ✓ Both A and B
Technician A says that PO441 through PO445 cover purge valve operation.
Technician B says that OBD II systems have no codes for the evaporative emissions system.
Who is correct? Ans: ✓ ✓ ✓ A only
Technician A says that the fuel tank pressure sensor is much like an MAF sensor.
Technician B says that the FTP sensor measures fuel pressure from the fuel pump.
Who is correct? Ans: ✓ ✓ ✓ Neither A nor B
Technician A says it is recommended that you wear shoes with nonslip soles in the shop.
Technician B says shoes worn in the shop should have steel toes.
Who is correct? Ans: ✓ ✓ ✓ Both A and B
Technician A ties his long hair behind his head while working in the shop.
Technician B covers her long hair with a brimless cap.
Who is correct? Ans: ✓ ✓ ✓ Both A and B
Technician A uses compressed air to blow dirt from his clothes and hair.
Technician B says this should only be done outside Ans: ✓ ✓ ✓ Neither A nor B
© Get it right 2025 Getaway - Stuvia US All rights reserved
