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WorksheetsAutomotive fuel, ignition, air and exhaust systems
Total questions: 77
Worksheet time: 2hrs 35mins
An internal combustion engine (ICE) creates kinetic energy from what energy source?
Chemical energy
Fluid energy
Carbon energy
Green energy
Which are the common types of Internal combustion engines (ICE) used in modern automotive applications?
Reciprocating piston engine
Rotary Wankel engine
Random firing engine
Steam engine
Flux capacitor engine
Which are the four strokes of the reciprocating piston engine?
Extinguish
Induction
Compression
Ignition/power
Exhaust
What type of ignition source does a Diesel engine utilise?
Explosion Ignition (EI)
Compression Ignition (CI)
Spark Ignition (SI)
Wack Ignition (WI)
What type of ignition source does a petrol engine utilise?
Compression Ignition (CI)
Quark Ignition (QI)
Spark Ignition (SI)
Fuel Ignition (FI)
What is the ideal or stoichiometric ratio for a petrol engine?
55:1
1055:1
14.55:1
14.7:1
What is the ideal or stoichiometric ratio of a diesel engine?
14.5:1
14.5:2
14.55:10
14.7:1
Which has a higher compression ratio?
A diesel engine
A petrol engine
Which has a lower compression ration?
A petrol engine
A diesel engine
Which of the following is an average compression ratio range for a petrol engine?
Between 5:1 and 6:1
Between 1:1 and 10:1
Between 8:1 and 12:1
Between 18:1 and 25:1
Which of the following is an average compression ratio range for a diesel engine?
Between 18:1 and 25:1
Between 8:1 and 12:1
Between 70:1 and 100:1
Between 7:1 and 14:1
Looking at the image can you identify from left to right the type of fuel injection system?
Single point injection, Direct injection, Multipoint injection
Direct injection, Multipoint injection, Single point injection
Single point injection, Multipoint injection, Direct injection
The process of compressing fuel and air
compression
pressure
exhaust
ignition
An opening where spent fuel is released
intake
exhaust valve
cylinder
head
name the stroke
Induction
compression
power
Exhaust
Name the stroke
Induction
Compression
Power
Exhaust
On a 4 cylinder engine, if number 1 cylinder is on compression, what stroke is cylinder 4
Induction
compression
power
exhaust
How many faces does the rotary engine have?
1
2
3
4
The bore of the engine shown in the image is indicated as
1
2
3
4
Which of the following BEST describes the term TDC?
Furthest point of piston travel away from the Crankshaft
Time and distance covered
Top of the piston
Nearest point of piston travel towards the Crankshaft
During the first stroke (Intake), what valves are open-if any?
Both closed
Intake valve open, Exhaust closed.
Both are open
Intake valve closed, Exhaust valve open.
What is it?
valve
crankshaft
bottom
wrench
List the strokes of the 4 - cycle engine theory in order.
Intake, Power, Compression, Exhaust
Intake, Compression, Power, Exhaust
Exhaust, Power, Compression, Intake
Compression, Power, Intake, Exhaust
_________ is a rotational force, that is, a force that causes rotation and not forward movement.
Gravity
Speed
Torque
Velocity
Which of the following are benefits of gears?
Change the plane of rotation
Increase or decrease the speed of applied motion
Increase or decrease the applied force
Provide a drive without slippage
A fuel pump..
moves gas for the gas tank to the engine
in a modern vehicle is electric
pumps a fuel at pressures from 5 to 60 PSI
all of the above
Automotive systems are an electro mechanical system.
ture
false
Why is a dry element air filter pleated
To increase the surface area
Its easier to manufacture
It improves the look
It cools the air down
Apart from removing particles from the air the air cleaner also
Increases the oxygen
Quietens the air intake
stops smoke in the exhaust
Pressurises the air
Two other types of air cleaner can be known as a:
oil shower and cycle home
oil bath and spinner
oil bath and cyclone
oily cyclone and wet bath
Intake manifolds are tubes connected to the inlet ports of an engine to guide in:
Fuel
Fuel and air
Exhaust gasses
Engine oil
Inlet manifolds on old vehicles used to hold the carburetor to mix the fuel into the air, but inlet manifolds on modern vehicles hold the .............. ........... instead
Exhaust manifold
Fuel pump
petrol mixers
fuel injectors
A Plenum chamber is part of the inlet manifold it could be known as a type of:
sump
Mixer
Reservoir
pump
One type of engine only takes air into the engine, which is it?
Petrol engine
Diesel engine
This is the first part of the exhaust system, what is it called?
Inlet manifold
Down pipe
Tail pipe
Exhaust manifold
What is the main safety consideration when working with or near an exhaust system?
Its likely to be oily
Its likely to be hot
It could be corrosive
It could be noisy
What is the English term for Muffler?
Silencer
Quietener
Hand warmer
Box
Do some silencers allow the exhaust gas to flow straight through?
Yes
No
What would an exhaust system be inspected for?
Noise, security, water leaks
Condition, leaks, noise, security
Smoke colour, noise, security
Part number, size, emissions
To improve the emissions of a vehicle what exhaust component is fitted?
Filter
Dogalytic converter
Gas analyser
Catalytic converter
What are the bad gasses produced by the engine?
Carbon monoxide, Hydrocarbons, Carbon Dioxide
Carbon Dioxide, Helium, Oxides of Nitrogen
Carbon of Nitrogen, Oxides of oxygen, Water
Oxides of Nitrogen, Carbon monoxide, Hydrocarbons
Where is the "Cat" located on an exhaust system?
At the tail Pipe
Near the engine
Half way down
Before the exhaust manifold
Exhaust manifolds are usually made out of:
Cast Iron
Aluminium
Plastic
Glass
On a cooling system the flow from the engine goes into the radiator at:
The top
The bottom
The component shown is a :
Oil pump
Thermostat
Water pump
Vane gear
When does a thermostat open?
When the engine first starts
When the engine is stationary
When the air flow over the radiator is at a set temperature
When the coolant in the engine reaches a set temperature
What is usually used to drive a water pump?
A chain
A gear
Water pressure
A belt
In a multi-point injection system atomised fuel is sprayed very close to which one of the following component
Continuous multi-point injection
Single –point injection
Double point injection
Sequential multi-point injection
In a multi-point injection system atomised fuel is sprayed very close to which one of the following component
Inlet valves
Exhaust valves
Engine cylinder wall
Catalytic converter
When diesel injectors are being replaced what component also needs to be renewed?
Diesel fuel filter
Injector sealing washers
Leak off and return pipes
Electronic control unit
Which one of the following would be different on a single –point injection (spi) and the multi point injection (MPI) fuel system?
Exhaust manifold location
Throttle valve location
Inlet valve position
Fuel type used
Which design cylinder head is shown in the image?
Spark ignition with two inlet valves
Compression ignition with two inlet valves
Spark ignition with three inlet valves
Compression ignition with three inlet valves
What is one advantages of using a coil per spark plug system?
High tension leads are longer
High tension leads are shorter
High tension leads are not required
High tension leads can be made from aluminium
What is the exhaust component shown in the image?
Resonator box
Expansion box
Middle box
Catalytic converter
What is the main function of a secondary air injection system
To further burn excess hydro-carbons and carbon monoxide
(HC+CO) in the exhaust manifold
To burn excess hydro –carbons and carbon monoxide (HC+CO) in the inlet manifold
To further burn excess burn excess oxides of nitrogen and carbon dioxide (NOx+CO2) in the exhaust manifold
To burn excess oxides of nitrogen and carbon dioxide (NOx+CO2) In the inlet manifold
What three harmful gases are converted by the catalytic converter?
CO₂ +H₂O+N₂
HC+CO+H₂O
HC+CO₂+H₂O
N₂+CO₂+NOx
What equipment should be used to carry out a final check after multi-point fuel injectors have been replaced?
Emission tester
Fuel pressure tester
Multimeter
Oscilioscope
Which one of the following is a method used in silencers to reduce exhaust noise?
Baffle plates
Gate plates
Perforated plates
Twin tail pipes
Which one of the following exhaust produced by incomplete combustion?
Carbon dioxide
Carbon monoxide
Oxygen
Water
What is the electronic fuel injection component shown in the image?
Mass air flow sensor
Manifold absolute pressure sensor
Air flow meter (moving vain type)
Exhaust gas recirculation valve
Which one of the following component maintains fuel system pressure in an electronic fuel injection (EFI) system?
Fuel rail
Fuel filter
Fuel regulator
Fuel injector
What is the purpose of sensor in the image shown?
Signais the ECU for throttle position
Control the idle speed of the engine
Advance the ignition timing
Detects the volume of air flow
When diesel injectors are being replaced what component also needs to be renewed?
Diesel fuel filter
Injector sealing washers
Leak off and return pipes
Electronic control unit
Into which circuit is an ignition system ballast resistor sometimes fitted?
Primary circuit
Secondary circuit
Spark plug H.Y circuit
Spark plug AC circuit
Why is an internal resistor incorporated into a spark plug?
To increase firing voltage
To reduce radio interference
To increase fuel economy
To reduce exhaust emissions
What is the exhaust component indicated in the image shown?
Post catalytic converter oxygen sensor
Pre catalytic converter oxygen sensor
Post catalytic converter carbon dioxide sensor
Pre catalytic converter carbon dioxide sensor
Why do turbocharger shaft bearings require constant cooling to prevent them overheating?
The exhaust gas flow is reduced causing a rise in temperature
The exhaust gas driving the turbine creates a high temperature
The increasein air pressure causes a high rise in temperature
The prevention of turbine blade failure due to the increase in temperature
