Engine Performance I - Test One Exam
Actual Questions and Answers 2026
Technician A says both turbocharging and supercharging force more
fuel into the engine for greater performance. Technician B says
engines with turbochargers or superchargers require high octane
fuel. Who is correct? -
correct answer ✅Technician B
One complete combustion cycle requires two revolutions of the
crankshaft. -
correct answer ✅True
All are functions of the modern fuel system except: -
correct answer ✅Mix the fuel with the air
During cold engine start or acceleration, the air-fuel mixture may
be: -
correct answer ✅Richer than normal
The EGR valve is used to reduce: -
correct answer ✅Oxides of nitrogen
The piston converts reciprocating motions into rotory motions. -
correct answer ✅False
,Engine Performance I - Test One Exam
Actual Questions and Answers 2026
Technician A says to use only sockets that are designed for use on
impact wrenches when using an impact wrench. Technician B says
any socket is suitable to use with an impact wrench as long as the
technician visually inspects the socket. Who is correct? -
correct answer ✅Technician A
The crankshaft, camshaft, and valves are located within the engine
block. -
correct answer ✅False
A defective PCV valve can cause: -
correct answer ✅All of the above
The PCV valve helps eliminate water and unburned fuel from the
engine. -
correct answer ✅True
While using a lift to raise a vehicle -
correct answer ✅All of the above
, Engine Performance I - Test One Exam
Actual Questions and Answers 2026
Which of the following will cause the MIL to illuminate? -
correct answer ✅Emission faults
Which is not a component of the starting system? -
correct answer ✅Voltage regulator
In order to save time it may be a good idea to guess at an
adjustment -
correct answer ✅False
Turbocharges and supercharges force more fuel into the cylinders
to increase performance. -
correct answer ✅False
A turbocharger: -
correct answer ✅Compresses intake air
Oxides of nitrogen (NOx) form only under high combustion
temperatures. -
correct answer ✅True
Actual Questions and Answers 2026
Technician A says both turbocharging and supercharging force more
fuel into the engine for greater performance. Technician B says
engines with turbochargers or superchargers require high octane
fuel. Who is correct? -
correct answer ✅Technician B
One complete combustion cycle requires two revolutions of the
crankshaft. -
correct answer ✅True
All are functions of the modern fuel system except: -
correct answer ✅Mix the fuel with the air
During cold engine start or acceleration, the air-fuel mixture may
be: -
correct answer ✅Richer than normal
The EGR valve is used to reduce: -
correct answer ✅Oxides of nitrogen
The piston converts reciprocating motions into rotory motions. -
correct answer ✅False
,Engine Performance I - Test One Exam
Actual Questions and Answers 2026
Technician A says to use only sockets that are designed for use on
impact wrenches when using an impact wrench. Technician B says
any socket is suitable to use with an impact wrench as long as the
technician visually inspects the socket. Who is correct? -
correct answer ✅Technician A
The crankshaft, camshaft, and valves are located within the engine
block. -
correct answer ✅False
A defective PCV valve can cause: -
correct answer ✅All of the above
The PCV valve helps eliminate water and unburned fuel from the
engine. -
correct answer ✅True
While using a lift to raise a vehicle -
correct answer ✅All of the above
, Engine Performance I - Test One Exam
Actual Questions and Answers 2026
Which of the following will cause the MIL to illuminate? -
correct answer ✅Emission faults
Which is not a component of the starting system? -
correct answer ✅Voltage regulator
In order to save time it may be a good idea to guess at an
adjustment -
correct answer ✅False
Turbocharges and supercharges force more fuel into the cylinders
to increase performance. -
correct answer ✅False
A turbocharger: -
correct answer ✅Compresses intake air
Oxides of nitrogen (NOx) form only under high combustion
temperatures. -
correct answer ✅True
