WorksheetsLV 2.1 Engine System Quiz
Total questions: 45
Worksheet time: 23mins
What does the diagram labeled "Single point" represent in an engine system?
Single-point fuel injection system
Multi-point fuel injection system
Carburetor system
Turbocharger system
What is another name for Single Point Injection?
Multi Point Injection
Direct Injection
Throttle Body Injection
Port Injection
What is the fuel supply pressure for Single Point Injection?
2 bar
1 bar
3 bar
4 bar
Compared to multi point injection, what is a benefit of Single Point Injection?
Higher fuel efficiency
Lower production costs
Increased power output
Faster response time
What does the diagram labeled "Multipoint" primarily illustrate?
A single-point fuel injection system
A multipoint fuel injection system
A carburetor system
An exhaust system
What is another name for the multipoint fuel injection system?
MFI
MPI
MPT
MPF
What is the typical fuel supply pressure range for a multipoint injection system?
1-2 bar
2-3 bar
3-4 bar
4-5 bar
How many injectors are used per cylinder in a multipoint injection system?
1 injector
2 injectors
3 injectors
4 injectors
What does MAF stand for in air metering?
Mass Air Flow
Maximum Air Flow
Main Air Flow
Measured Air Flow
What does MAP stand for in air metering?
Manifold Absolute Pressure
Maximum Air Pressure
Main Air Pressure
Measured Air Pressure
What does ECU stand for in automotive systems?
Electronic Control Unit
Engine Control Unit
Electrical Control Unit
Energy Control Unit
What type of signals does an ECU process?
Input and Output signals
Only Input signals
Only Output signals
No signals
What component was replaced by an electronic system in Distributorless Ignition Systems (DIS)?
Distributor
Coil pack
Spark plug
Crankshaft sensor
What is the purpose of the electronic system in Distributorless Ignition Systems (DIS)?
To determine which spark plug should receive a spark
To increase fuel efficiency
To reduce engine noise
To control the air intake
What does the term "Dwell Angle" refer to in the context of ignition systems?
Points open
Points closed
Spark plug firing
Coil charging
Which of the following is a type of trigger system used in ignition systems?
Mechanical
Optical
Hydraulic
Pneumatic
What does "Pinking" refer to in engine terminology?
Normal combustion
Abnormal combustion
Fuel efficiency
Engine cooling
Which effect is utilized in some ignition systems for triggering?
Doppler effect
Hall effect
Photoelectric effect
Seebeck effect
What is the stoichiometric air/fuel ratio for combustion?
14.7:1
12.5:1
16.0:1
13.2:1
How many kilograms of air are required for 1 kilogram of fuel in a stoichiometric mixture?
14.7 kg
12.5 kg
16.0 kg
13.2 kg
What does a lambda (λ) value of 1 indicate in terms of air/fuel ratio?
14.7:1
12.5:1
16.0:1
13.2:1
What does a higher voltage signal from the Lambda sensor indicate about the mixture?
The mixture is richer.
The mixture is leaner.
The mixture is neutral.
The mixture is unchanged.
Where is the lambda sensor or oxygen sensor typically fitted?
In the fuel tank
In the exhaust down pipe or manifold
In the air filter
In the radiator
What is the primary function of a Three Way Catalyst (TWC) in a catalytic converter?
To convert CO, HC, and NOx into CO2, H2O, and N2
To increase the fuel efficiency of a vehicle
To reduce the noise produced by the engine
To enhance the power output of the engine
Which of the following gases is NOT a product of the Three Way Catalyst (TWC) process?
CO2
H2O
N2
O2
What component is labeled as the outermost part of the catalytic converter in the diagram?
Wire net
Carriers
Outer shell
Catalyst
What does the abbreviation CO stand for in exhaust emissions?
Carbon Dioxide
Carbon Monoxide
Nitrogen Oxides
Particulate Matter
What is represented by the abbreviation CO² in exhaust emissions?
Carbon Monoxide
Hydrocarbons
Carbon Dioxide
Water
In the context of exhaust emissions, what does HC stand for?
Hydrocarbons
Nitrogen
Water
Particulate Matter
What does H₂O represent in exhaust emissions?
Nitrogen Oxides
Water
Carbon Monoxide
Hydrocarbons
What is the meaning of NOx in the context of exhaust emissions?
Nitrogen
Carbon Dioxide
Nitrogen Oxides
Particulate Matter
In exhaust emissions, what does N² stand for?
Nitrogen
Water
Carbon Monoxide
Hydrocarbons
What does PM represent in the context of exhaust emissions?
Carbon Dioxide
Particulate Matter/Smoke
Nitrogen Oxides
Water
What is the primary purpose of Exhaust Gas Recirculation (EGR)?
To increase engine power
To recycle exhaust gas and reduce NOx
To improve fuel efficiency
To cool the engine
How can EGR valves be operated?
Manually or hydraulically
Pneumatically or magnetically
Vacuum or electrically
Mechanically or chemically
What does the octane rating measure in petrol?
The color of the petrol
The petrol's ability to burn without detonation of combustion knock
The price of the petrol
The density of the petrol
Which of the following is NOT a type of compression ignition fuel system?
In-line pump
Distributor or rotary
Unit injector
Carburetor
How many main types of compression ignition fuel systems are there?
Two
Three
Four
Five
Which type of fuel system is known for using a common rail?
In-line pump
Distributor or rotary
Unit injector
Common Rail
What is the maximum pressure that can be present in a common rail system?
1400 bar
1000 bar
800 bar
500 bar
What does the cetane number (CN) measure in diesel fuel?
The viscosity of diesel fuel
The combustion quality of diesel fuel during compression ignition
The sulfur content in diesel fuel
The freezing point of diesel fuel
What occurs during Phase 1 of diesel combustion?
The fuel burns as it enters the combustion chamber.
The time between the start of injection and beginning of the pressure rise.
The spreading flame causes a rise in pressure.
The rate of pressure rise dictates the amount of ‘knock’.
What is the main characteristic of Phase 2 in diesel combustion?
Fuel particles are being heated to the temperature needed for self-ignition.
The fuel burns as it enters the combustion chamber.
The spreading flame causes a rise in pressure due to the sudden combustion of fuel.
Phase 3 only exists when the engine is under full load.
When does Phase 3 of diesel combustion occur?
During the ignition delay.
When the engine is under full load.
During the flame spread.
When the fuel particles are being heated.
What dictates the amount of ‘knock’ in Phase 2 of diesel combustion?
The time between the start of injection and beginning of the pressure rise.
The rate of pressure rise.
The temperature needed for the fuel to self-ignite.
The gradual rise in pressure.
