Ready to test your Knowledge?
Try out our new practice tests completely free!
exam preparation banner icon

Automotive Technology

Trade & Technology

Quiz 24 :

Engine Performance Systems

Quiz 24 :

Engine Performance Systems

search
arrow
Higher compression ratios tend to speed up combustion.
Free
True False
Answer:

Answer:

True

arrow
In a GDI system (gasoline direct injection) the injector sprays fuel into the ______.
Free
Multiple Choice
Answer:

Answer:

D

arrow
Which of the following jobs is NOT a function of the ignition system?
Free
Multiple Choice
Answer:

Answer:

A

arrow
When there is a calibration update available for an OBD-II vehicle, the old EPROM is removed from its socket in the PCM and a new EPROM with the updated software is installed in its place.
True False
Answer:
arrow
Which of the following is not a PCM output?
Multiple Choice
Answer:
arrow
The PCM can turn off the A/C compressor when the engine is operating at full throttle.
True False
Answer:
arrow
Engine vacuum is being discussed. Technician A says that when the engine is operating under light loads, engine vacuum is low. Technician B says that engine vacuum is high when the engine is operated under heavy loads. Who is correct?
Multiple Choice
Answer:
arrow
The MIL light should illuminate when the ignition switch is turned to the run position [engine not running] and go out within a few seconds after the engine is started.
True False
Answer:
arrow
Which of the following is NOT an advantage of an electronic spark control system?
Multiple Choice
Answer:
arrow
During the EVAP monitor vacuum pull-down test, the canister vent solenoid is held open.
True False
Answer:
arrow
Higher-octane fuels are easier to ignite and burn faster than low-octane fuel.
True False
Answer:
arrow
Ignition spark typically occurs a few degrees _______.
Multiple Choice
Answer:
arrow
The injector pulse width is ______.
Multiple Choice
Answer:
arrow
Only OBD-II equipped vehicles have a sixteen-pin DLC connector.
True False
Answer:
arrow
Air/fuel ratios are being discussed. Technician A says that when the air fuel ratio is higher than 14.7 to 1 the engine produces more power. Technician B says that when the air fuel ratio is lower than 14.7 to 1 the engine uses less fuel. Who is correct?
Multiple Choice
Answer:
arrow
OBD-II regulations require all vehicle manufacturers to use the same names and acronyms for all electric and electronic systems related to the engine and emission control systems.
True False
Answer:
arrow
Which of the following chemicals is NOT a pollutant?
Multiple Choice
Answer:
arrow
The PCM can be electronically linked to other control modules.
True False
Answer:
arrow
Port fuel injection systems have a throttle plate assembly, but fuel never passes by the plate.
True False
Answer:
arrow
Scan tools can be used to cycle on and off some actuators such as injectors, vacuum solenoids, idle air control motors, and the like.
True False
Answer:
Showing 1 - 20 of 69