ASE - Engine Performance Study Guide 2023 with
complete solution
Magnetic pulse generators are used to provide a digital signal about component speed
or position.
False
A digital signal may be called a square-wave signal.
True
The manifold absolute pressure (MAP) sensor monitors engine load.
True
A defective O2 sensor heater may cause reduced open loop time.
False
A defective vehicle speed sensor may cause improper torque converter lockup.
True
A vehicle with throttle actuator control may use three throttle position sensors.
True
The exhaust gas recirculation valve position sensor is a linear potentiometer mounted
on top of the EGR valve.
True
The knock sensor changes vibration to a frequency signal and sends the signal to the
computer.
False
Many modules have to be reprogrammed for the vehicle if they are to be replaced.
True
Engines that have throttle actuator control require an idle air control motor.
False
When checking a solenoid with an ohmmeter, there should be an infinity reading on the
meter if the solenoid is good.
False
If the computer activates a component or circuit by completing a ground it is referred to
as a feed side driver.
False
The idle air control motor works by varying the position of the throttle plate.
False
The digital EGR is comprised of three solenoids that all flow different amounts of EGR.
True
Many modern engines do not have adjustable ignition timing.
True
Networking smaller more specialized modules is more cost effective than using one or
two centralized complex modules.
True
The individual modules in a CAN system are sometimes called nodes.
True
Modules on the serial bus that can initiate communication with other modules on the
serial data bus are called slaves.
, False
A hot-range spark plug has a shorter heat path than a cold-range spark plug.
False
The ignition system contains two electrical sides, the primary and the secondary.
True
The secondary coil winding contains two hundred turns of heavy wire.
False
Base or initial timing is timing with computer advance added.
False
The ignition coil is both a primary and secondary ignition component.
True
Base timing is often adjustable on DI systems.
True
Ignition cables are usually made of solid wire which acts as a resistor in the secondary
circuit.
False
Carbon tracking is the formation of carbonized dust between distributor cap terminals.
True
At increased RPM and less time between coil firings, electronic dwell begins earlier to
allow for coil saturation.
True
The parade pattern on an oscilloscope displays cylinder patterns from right to left.
False
The triggering device in an electronic ignition system is used to indicate crankshaft
position.
True
Waste spark system deliver spark to two cylinders at once.
True
One type of fast start electronic ignition system uses two crankshaft position sensors.
True
On most electronic ignition systems base timing needs to checked and adjusted
whenever the system is serviced.
False
The camshaft position sensor may have to timed to the engine when it is installed.
True
A shorted secondary coil winding provides an ohmmeter reading above the specified
resistance.
False
A shorted ignition coil may damage the ignition module.
True
Spark plugs with iridium tips should not be re-gapped.
True
PIP stands for profile ignition pickup.
True
In a waste spark system the spark plugs are connected in parallel to the ignition coils.
False
complete solution
Magnetic pulse generators are used to provide a digital signal about component speed
or position.
False
A digital signal may be called a square-wave signal.
True
The manifold absolute pressure (MAP) sensor monitors engine load.
True
A defective O2 sensor heater may cause reduced open loop time.
False
A defective vehicle speed sensor may cause improper torque converter lockup.
True
A vehicle with throttle actuator control may use three throttle position sensors.
True
The exhaust gas recirculation valve position sensor is a linear potentiometer mounted
on top of the EGR valve.
True
The knock sensor changes vibration to a frequency signal and sends the signal to the
computer.
False
Many modules have to be reprogrammed for the vehicle if they are to be replaced.
True
Engines that have throttle actuator control require an idle air control motor.
False
When checking a solenoid with an ohmmeter, there should be an infinity reading on the
meter if the solenoid is good.
False
If the computer activates a component or circuit by completing a ground it is referred to
as a feed side driver.
False
The idle air control motor works by varying the position of the throttle plate.
False
The digital EGR is comprised of three solenoids that all flow different amounts of EGR.
True
Many modern engines do not have adjustable ignition timing.
True
Networking smaller more specialized modules is more cost effective than using one or
two centralized complex modules.
True
The individual modules in a CAN system are sometimes called nodes.
True
Modules on the serial bus that can initiate communication with other modules on the
serial data bus are called slaves.
, False
A hot-range spark plug has a shorter heat path than a cold-range spark plug.
False
The ignition system contains two electrical sides, the primary and the secondary.
True
The secondary coil winding contains two hundred turns of heavy wire.
False
Base or initial timing is timing with computer advance added.
False
The ignition coil is both a primary and secondary ignition component.
True
Base timing is often adjustable on DI systems.
True
Ignition cables are usually made of solid wire which acts as a resistor in the secondary
circuit.
False
Carbon tracking is the formation of carbonized dust between distributor cap terminals.
True
At increased RPM and less time between coil firings, electronic dwell begins earlier to
allow for coil saturation.
True
The parade pattern on an oscilloscope displays cylinder patterns from right to left.
False
The triggering device in an electronic ignition system is used to indicate crankshaft
position.
True
Waste spark system deliver spark to two cylinders at once.
True
One type of fast start electronic ignition system uses two crankshaft position sensors.
True
On most electronic ignition systems base timing needs to checked and adjusted
whenever the system is serviced.
False
The camshaft position sensor may have to timed to the engine when it is installed.
True
A shorted secondary coil winding provides an ohmmeter reading above the specified
resistance.
False
A shorted ignition coil may damage the ignition module.
True
Spark plugs with iridium tips should not be re-gapped.
True
PIP stands for profile ignition pickup.
True
In a waste spark system the spark plugs are connected in parallel to the ignition coils.
False
