ASE - Engine Performance Exam 2025
Questions and Answers
Magnetic pulse generators are used to provide a digital signal about component speed or position. -
ANSWER✔✔-False
A digital signal may be called a square-wave signal. - ANSWER✔✔-True
The manifold absolute pressure (MAP) sensor monitors engine load. - ANSWER✔✔-True
A defective O2 sensor heater may cause reduced open loop time. - ANSWER✔✔-False
A defective vehicle speed sensor may cause improper torque converter lockup. - ANSWER✔✔-
True
A vehicle with throttle actuator control may use three throttle position sensors. - ANSWER✔✔-
True
The exhaust gas recirculation valve position sensor is a linear potentiometer mounted on top of the
EGR valve. - ANSWER✔✔-True
The knock sensor changes vibration to a frequency signal and sends the signal to the computer. -
ANSWER✔✔-False
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
,Many modules have to be reprogrammed for the vehicle if they are to be replaced. - ANSWER✔✔-
True
Engines that have throttle actuator control require an idle air control motor. - ANSWER✔✔-False
When checking a solenoid with an ohmmeter, there should be an infinity reading on the meter if the
solenoid is good. - ANSWER✔✔-False
If the computer activates a component or circuit by completing a ground it is referred to as a feed
side driver. - ANSWER✔✔-False
The idle air control motor works by varying the position of the throttle plate. - ANSWER✔✔-False
The digital EGR is comprised of three solenoids that all flow different amounts of EGR. -
ANSWER✔✔-True
Many modern engines do not have adjustable ignition timing. - ANSWER✔✔-True
Networking smaller more specialized modules is more cost effective than using one or two
centralized complex modules. - ANSWER✔✔-True
The individual modules in a CAN system are sometimes called nodes. - ANSWER✔✔-True
Modules on the serial bus that can initiate communication with other modules on the serial data bus
are called slaves. - ANSWER✔✔-False
A hot-range spark plug has a shorter heat path than a cold-range spark plug. - ANSWER✔✔-False
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
, The ignition system contains two electrical sides, the primary and the secondary. - ANSWER✔✔-
True
The secondary coil winding contains two hundred turns of heavy wire. - ANSWER✔✔-False
Base or initial timing is timing with computer advance added. - ANSWER✔✔-False
The ignition coil is both a primary and secondary ignition component. - ANSWER✔✔-True
Base timing is often adjustable on DI systems. - ANSWER✔✔-True
Ignition cables are usually made of solid wire which acts as a resistor in the secondary circuit. -
ANSWER✔✔-False
Carbon tracking is the formation of carbonized dust between distributor cap terminals. -
ANSWER✔✔-True
At increased RPM and less time between coil firings, electronic dwell begins earlier to allow for coil
saturation. - ANSWER✔✔-True
The parade pattern on an oscilloscope displays cylinder patterns from right to left. - ANSWER✔✔-
False
The triggering device in an electronic ignition system is used to indicate crankshaft position. -
ANSWER✔✔-True
Waste spark system deliver spark to two cylinders at once. - ANSWER✔✔-True
One type of fast start electronic ignition system uses two crankshaft position sensors. -
ANSWER✔✔-True
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 3
Questions and Answers
Magnetic pulse generators are used to provide a digital signal about component speed or position. -
ANSWER✔✔-False
A digital signal may be called a square-wave signal. - ANSWER✔✔-True
The manifold absolute pressure (MAP) sensor monitors engine load. - ANSWER✔✔-True
A defective O2 sensor heater may cause reduced open loop time. - ANSWER✔✔-False
A defective vehicle speed sensor may cause improper torque converter lockup. - ANSWER✔✔-
True
A vehicle with throttle actuator control may use three throttle position sensors. - ANSWER✔✔-
True
The exhaust gas recirculation valve position sensor is a linear potentiometer mounted on top of the
EGR valve. - ANSWER✔✔-True
The knock sensor changes vibration to a frequency signal and sends the signal to the computer. -
ANSWER✔✔-False
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
,Many modules have to be reprogrammed for the vehicle if they are to be replaced. - ANSWER✔✔-
True
Engines that have throttle actuator control require an idle air control motor. - ANSWER✔✔-False
When checking a solenoid with an ohmmeter, there should be an infinity reading on the meter if the
solenoid is good. - ANSWER✔✔-False
If the computer activates a component or circuit by completing a ground it is referred to as a feed
side driver. - ANSWER✔✔-False
The idle air control motor works by varying the position of the throttle plate. - ANSWER✔✔-False
The digital EGR is comprised of three solenoids that all flow different amounts of EGR. -
ANSWER✔✔-True
Many modern engines do not have adjustable ignition timing. - ANSWER✔✔-True
Networking smaller more specialized modules is more cost effective than using one or two
centralized complex modules. - ANSWER✔✔-True
The individual modules in a CAN system are sometimes called nodes. - ANSWER✔✔-True
Modules on the serial bus that can initiate communication with other modules on the serial data bus
are called slaves. - ANSWER✔✔-False
A hot-range spark plug has a shorter heat path than a cold-range spark plug. - ANSWER✔✔-False
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
, The ignition system contains two electrical sides, the primary and the secondary. - ANSWER✔✔-
True
The secondary coil winding contains two hundred turns of heavy wire. - ANSWER✔✔-False
Base or initial timing is timing with computer advance added. - ANSWER✔✔-False
The ignition coil is both a primary and secondary ignition component. - ANSWER✔✔-True
Base timing is often adjustable on DI systems. - ANSWER✔✔-True
Ignition cables are usually made of solid wire which acts as a resistor in the secondary circuit. -
ANSWER✔✔-False
Carbon tracking is the formation of carbonized dust between distributor cap terminals. -
ANSWER✔✔-True
At increased RPM and less time between coil firings, electronic dwell begins earlier to allow for coil
saturation. - ANSWER✔✔-True
The parade pattern on an oscilloscope displays cylinder patterns from right to left. - ANSWER✔✔-
False
The triggering device in an electronic ignition system is used to indicate crankshaft position. -
ANSWER✔✔-True
Waste spark system deliver spark to two cylinders at once. - ANSWER✔✔-True
One type of fast start electronic ignition system uses two crankshaft position sensors. -
ANSWER✔✔-True
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 3
