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WorksheetsDVA31064 CH3: Vehicle Ignition System
Total questions: 34
Worksheet time: 17mins
A petrol engine requires:
1. Spark
2. Fuel
3. Water
4. Air, to produce combustion.
Which of the following combinations is correct?
1, 2 and 3
1 and 2
1, 2 and 4
1, 3 and 4
How many different circuits are there in a contact breaker ignition system?
1
2
3
4
On what voltage, in volts, does the primary ignition circuit operate?
6
12
24
10
Which part distributes the spark to each cylinder in turn?
Spark plug
Rotor arm
Distributor cap
Ignition Coil
Which winding has the most turns?
Primary
Secondary
What is the voltage, in volts, in the secondary winding; during the dwell period?
0
12
20000
15000
Which part switches the primary circuit on and off?
Distributor cap
Ignition coil
Rotor arm
Contact breaker
What is the distributor cap made from?
Brass
Hard plastic
Spring metal
Carbon
What material are the spark plug conducting leads made from?
Copper
Carbon
Brass
Steel
Where is a ballast resistor connected?
Between the coil and the starter solenoid
Between the ignition switch run position and the distributor
Between the ignition switch run position and the starter solenoid
Between the coil and the ignition switch run position
Which part was replaced in a DI system?
Distributor
Contact breaker
Spark plug
Rotor arm
How many different types of sensing system could be used with a DI system?
1
2
3
4
What type of light is used in optical sensing systems?
Infrared
Ultraviolet
White
Pulsed
What directly triggers a Hall effect device?
Light
Mechanical movement
Magnetism
A Supply voltage
An inductive sensor picks up the changing magnetic field produced by a rotating magnet. Is this true or false?
True
False
A magnetic pickup produces a digital output signal. Is this true or false?
True
False
In an ICM, what is the stage immediately before the driver stage?
Amplifier
Pulse shaper
Dwell control
Power supply
HEI coils produce a higher voltage than traditional ignition coils. Is this true or false?
True
False
Which of the following was a prime cause of poor ignition timing?
Poor fuel quality
Wear in distributor drive gear
Inaccurate speed sensing
Resistance in spark plug leads
How did early DI systems automatically adjust the ignition timing?
By centrifugal or vacuum advance methods
No adjustment possible
By changing the gap on the contact breaker
By changing the distributor rotor arm
What do the initials TPS stand for when referring to an ignition system?
Transmission pulse sensor
Throttle pulse sensor
Transmission position sensor
Throttle position sensor
In a GM DI system, what voltage, in volts, is used to transfer control of the ignition to the ECU?
3
5
7
9
What distributor sensor is used in a typical GM DI system?
Optical
Inductive pickup
Hall effect
Capacitive
How many wires are used to communicate between the TFI-IV ICM and the EEC-IV ECU in a Ford DI system?
1
2
3
4
Which distributor sensor is used in a typical Ford DI system?
Optical
Inductive pickup
Hall effect
Capacitive
In a 4 cylinder system using a crankshaft driven sensor, how many missing teeth will there be on a trigger wheel for spark initiation?
1
2
3
4
Which of the following is NOT an advantage of a EI system?
Fewer moving parts
Cheaper to produce
No mechanical load on engine
Less maintenance required
What is the compression stroke cylinder called when it is fired by the DIS secondary circuit?
Event cylinder
Home cylinder
Waste cylinder
Lead cylinder
In an EI system, what directly causes the secondary circuit to fire?
The crankshaft rotation
The induction coil switching on
Switching the power supply on
The ECU turning the primary winding off
How many coils will there be in a typical Ford 4 cylinder system?
1
2
3
4
In a 4 cylinder system, how many times will the crankshaft turn before the same event cylinder fires again as an event cylinder?
1
2
3
4
In a typical GM distributorless ignition system, where does the camshaft sensor send its signal?
To the crankshaft sensor
To the electronic control unit
To the electronic coil module
To the ignition coil
How many coils will there be in a six cylinder direct ignition system?
2
4
6
8
Where does the capacitor discharge to in order to produce a spark in a typical CDI system?
To the secondary winding
To the primary winding
To the relay
To the spark plug
