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WorksheetsBasic Ignition System Principles and Operation
Total questions: 45
Worksheet time: 23mins
What is the main purpose of a high-voltage spark in a gasoline engine?
To cool the engine
To ignite the air-fuel mixture inside each cylinder
To lubricate the pistons
To increase fuel efficiency
The ignition system must create a high-voltage spark and ______ it to each cylinder at the proper time.
store
deliver
block
reduce
Which of the following is NOT an engine condition that the ignition system must control for spark timing?
Load
Speed
Color
Temperature
The original distributor type of ignition system was called a ________.
A) Electronic ignition system
B) Contact breaker point ignition system
C) Waste spark ignition system
D) Direct ignition system
Which of the following is NOT a way for a conductor to induce voltage according to Faraday's law?
A) A magnet moving to make its magnetic lines of force cut across the conductor.
B) A conductor moving and cutting across the stationary magnetic field.
C) Self-induction with changing current flow to the conductor.
D) Using a battery to power the conductor.
The primary winding of an induction coil is made with several hundred turns of ______.
fine, enameled copper wire
heavy wire
aluminum wire
plastic-coated wire
What is the maximum voltage the ignition coil can make called?
Required voltage
Available voltage
Infinite voltage
Spark voltage
The ignition's timing is critical and is called ______.
Spark timing
Voltage timing
Engine timing
Fuel timing
Which of the following is NOT a common component of most ignition systems?
Battery
Ignition switch
Fuel pump
Spark plugs
Key start systems can be manufactured in two different ways: a mechanical type and with a ________.
Transponder
Battery
Ignition coil
Spark plug
What is one function of a fob in a vehicle's ignition system?
Replace the ignition key
Use a fob and a start button
Unlock the steering column
All of the above.
An ignition coil features two terminals: the positive terminal and the ______ terminal.
Neutral
Negative
Ground
Live
What components are housed in the distributor?
A) Vacuum mechanism and mechanical timing advance mechanisms
B) Spark plug and cylinder head
C) Fuel injector and carburetor
D) Exhaust manifold and catalytic converter
A spark plug's metal shell is made with special threads wrapped around it, with the threads made to fit into a particular ____.
A) Cylinder head
B) Distributor
C) Fuel tank
D) Exhaust pipe
Which of the following is NOT a feature of a spark plug?
Diameter
Reach
Color
Heat range
The 'size' of a spark plug is measured by the diameter of its threads. Which of the following sizes might lighter-duty vehicles use?
14 mm
16 mm
20 mm
22 mm
A spark plug's reach refers to the distance from its seat to the end of its threads. If the reach is too long, what could happen?
The piston could hit the spark plug when the piston is moving upward.
The spark plug could overheat.
The spark plug could become loose.
The spark plug could corrode.
Fill in the blank: Two important organizations that set standards for spark plugs are the Society of Automotive Engineers (SAE) and the ____.
International Organization for Standardization (ISO)
American National Standards Institute (ANSI)
British Standards Institution (BSI)
Deutsches Institut für Normung (DIN)
What is the operating temperature range for spark plugs in a running engine?
500°F to 700°F
746°F to 1460°F
1500°F to 2000°F
300°F to 500°F
A spark plug's heat path is important because if it is too long, it can cause ______.
misfires
pre-ignition
overheating
low fuel efficiency
What are the two main components used in the electronic switching device?
Inductive pickup assembly and Hall-effect sensor
Stationary component and spinning component
Optical sensor and ignition module
Primary windings and magnetic field.
In newer vehicles, the ignition module is controlled by the PCM’s internal circuitry or by the circuitry housed in the ________.
A) Ignition coils
B) Distributor shaft
C) Primary windings
D) Optical sensor
Which of the following is a component of all VR sensors?
Light-emitting diode (LED)
Reluctor
Phototransistor
Hall-effect switch
The Hall-effect system is located inside the ________.
Crankshaft
Distributor
Ignition module
PCM
Which of the following parts is NOT included in a distributorless ignition system?
A) Bushings
B) Bearings
C) Breaker plate assembly
D) Distributor
In a waste spark ignition system, each ignition coil serves two cylinders. In one cylinder, the spark ignites the air-fuel mixture. What happens in the other cylinder?
A) The spark ignites the air-fuel mixture
B) The spark does not affect anything
C) The spark increases the compression
D) The spark decreases the compression
What happens to the air and fuel in the engine cylinder?
They are compressed and cooled
They are fired by the spark
They are expelled through the exhaust
They are mixed with oil.
In a coil-on-plug (COP) system, the ignition coil sits directly atop each ______.
piston
cylinder
spark plug
fuel injector
Which of the following is a benefit of distributorless ignition systems?
Higher voltage spark output
Increased maintenance
More parts/components failures
Higher vehicle weight
The PCM uses information from several sensors to control spark timing. Which sensor measures airflow into the engine?
Manifold absolute pressure (MAP) sensor
Mass airflow (MAF) sensor
Throttle position (TPS) sensor
Crankshaft position (CKP) sensor
Some manufacturers use an ion sense system instead of a knock sensor. This system detects ______.
Misfires
Airflow
Engine load
Temperature
Why is it important to perform ignition system maintenance?
It can make up to 100,000 volts
It reduces vehicle weight
It increases engine speed
It detects misfires.
Which of the following tools is needed to measure and adjust the spark plug gap before installation?
Regular spark plug socket
Spark plug gapping tool
High-tension wire puller
Application-specific spark plug socket
As a vehicle gets older, the secondary ignition system components wear out and may cause issues. Which of the following is NOT typically replaced?
A) Spark plugs
B) High-tension leads
C) Coil boots
D) Brake pads
Good maintenance and worn parts replacement can prevent ______.
Hard starting
Misfiring under load
Both A and B
None of the above.
Which of the following is NOT a common item to check during a visual inspection of the ignition system?
Loose connections
Broken terminals
Corroded terminals
Spark plug gap
A spark test should be performed when ______.
the vehicle is running smoothly
one or more cylinders are misfiring
the engine is new
the vehicle has a full tank of gas
Which of the following is NOT a tool used with an oscilloscope?
Spark plug sockets
A spark plug gapping tool
A high-tension wire puller
A hammer
The oscilloscope can test ______ circuits.
Primary
Secondary
Both primary and secondary
What is one of the purposes of using probes on the COP coil?
A) To increase the voltage
B) To sense the secondary ignition circuit's voltage
C) To decrease the voltage
D) To disconnect the circuit.
Before fully investigating the primary and secondary circuits, make sure that the spark coming directly out of the coil is ____.
weak
absent
good
intermittent
Which of the following is NOT a reason for an ignition system to work improperly?
Loose wires
Corroded wires
Properly connected wires
Faulty spark plugs
A faulty ignition coil can cause a ______.
Delayed acceleration
No-start
Misfire
All of the above
What can internal insulation breakdown in an ignition coil leak voltage to?
Primary circuit
Ground
Both A and B
None of the above
To find an insulation breakdown fault in the coil, the coil will need to be activated. What should be done next? Measure the voltage with an oscilloscope and ________ it to specifications.
Compare
Ignore
Increase
Decrease
