Engine Performance Chapter Exam
Questions & Answers (Grade A+)
The EGR valve is designed to reduce:
a. Oxides of oxygen
b. Carbon monoxide
c. Carbon dioxide
d. Oxides of nitrogen -
correct answer ✅D
Technician A says that the catalytic converter oxidizes hydrocarbons
(HC). Technician B says that the catalytic converter oxidizes CO
(carbon monoxide). -
correct answer ✅Both
Technician A says that the evaporative emission system (EVAP) must
detect a leak from a hole 0.020 inches in diameter beginning in the
2001 model year. Technician B says that the ORVR portion of the
evaporative emission system is designed to capture fuel vapors
produced during refueling. -
correct answer ✅Both
All of the following about an alternator are true except:
a. Recharge the battery after starting the engine.
b. Sense electrical load with the diodes.
,Engine Performance Chapter Exam
Questions & Answers (Grade A+)
c. PCM can control alternator output.
d. Power accessories when the engine is running -
correct answer ✅B
Technician A says that overheating can damage an engine in a
matter of minutes. Technician B says engines are designed to
operate at a temperature that promotes good combustion and low
emissions, as well as ensuring unburned fuel and water from the
combustion process are boiled off in the crankcase. -
correct answer ✅Both
All of the following are true about supercharging except:
a. Superchargers are driven by the exhaust flow.
b. Superchargers require a belt.
c. Superchargers create pressure inside the intake manifold.
d. Supercharged engines require high octane fuel. -
correct answer ✅A
The proper sequence for the four-cycle engine is:
a. Intake, exhaust, power, compression.
b. Compression, power, intake, exhaust.
, Engine Performance Chapter Exam
Questions & Answers (Grade A+)
c. Power, intake, compression, exhaust.
d. Intake, compression, power, exhaust. -
correct answer ✅D
Technician A says that the PCV system was introduced in
1998.Technician B says the PCV system helps eliminate blow-by and
oil contamination by unburned fuel. -
correct answer ✅Tech B
Technician A says the solenoid is used so a small amount of current
through the ignition switch can be used to control the much larger
starter current. Technician B says current to start the vehicle travels
directly through the ignition switch and then to the starter. -
correct answer ✅Tech A
Technician A says that direct injection is an earlier version of port
fuel injection. Technician B says that direct injection systems inject
fuel directly into the intake manifold. -
correct answer ✅Neither
All of the following are examples of engine designs except:
a. Horizontally opposed.
Questions & Answers (Grade A+)
The EGR valve is designed to reduce:
a. Oxides of oxygen
b. Carbon monoxide
c. Carbon dioxide
d. Oxides of nitrogen -
correct answer ✅D
Technician A says that the catalytic converter oxidizes hydrocarbons
(HC). Technician B says that the catalytic converter oxidizes CO
(carbon monoxide). -
correct answer ✅Both
Technician A says that the evaporative emission system (EVAP) must
detect a leak from a hole 0.020 inches in diameter beginning in the
2001 model year. Technician B says that the ORVR portion of the
evaporative emission system is designed to capture fuel vapors
produced during refueling. -
correct answer ✅Both
All of the following about an alternator are true except:
a. Recharge the battery after starting the engine.
b. Sense electrical load with the diodes.
,Engine Performance Chapter Exam
Questions & Answers (Grade A+)
c. PCM can control alternator output.
d. Power accessories when the engine is running -
correct answer ✅B
Technician A says that overheating can damage an engine in a
matter of minutes. Technician B says engines are designed to
operate at a temperature that promotes good combustion and low
emissions, as well as ensuring unburned fuel and water from the
combustion process are boiled off in the crankcase. -
correct answer ✅Both
All of the following are true about supercharging except:
a. Superchargers are driven by the exhaust flow.
b. Superchargers require a belt.
c. Superchargers create pressure inside the intake manifold.
d. Supercharged engines require high octane fuel. -
correct answer ✅A
The proper sequence for the four-cycle engine is:
a. Intake, exhaust, power, compression.
b. Compression, power, intake, exhaust.
, Engine Performance Chapter Exam
Questions & Answers (Grade A+)
c. Power, intake, compression, exhaust.
d. Intake, compression, power, exhaust. -
correct answer ✅D
Technician A says that the PCV system was introduced in
1998.Technician B says the PCV system helps eliminate blow-by and
oil contamination by unburned fuel. -
correct answer ✅Tech B
Technician A says the solenoid is used so a small amount of current
through the ignition switch can be used to control the much larger
starter current. Technician B says current to start the vehicle travels
directly through the ignition switch and then to the starter. -
correct answer ✅Tech A
Technician A says that direct injection is an earlier version of port
fuel injection. Technician B says that direct injection systems inject
fuel directly into the intake manifold. -
correct answer ✅Neither
All of the following are examples of engine designs except:
a. Horizontally opposed.
