NEW
Font size
WorksheetsFuel and Emission Control Quiz
Total questions: 15
Worksheet time: 8mins
Which gases are produced if the fuel mixture is not completely burnt?
Carbon monoxide and hydrogen
Oxides of nitrogen
Carbon dioxide and water
Methane and ethane
What is the purpose of adding additives to fuel?
To increase the fuel's color
To improve the anti-knock quality
To decrease the fuel's density
To reduce the fuel's cost
What is a common effect of engine modifications to meet emission regulations?
Increase in fuel consumption
Decrease in engine size
Increase in engine noise
Decrease in vehicle weight
What shape should the combustion chamber be to avoid unburnt fuel?
Long and narrow
Compact
Wide and flat
Cylindrical
What is the main factor controlling flame speed in an engine?
Fuel type
Chamber shape
Engine size
Exhaust type
What system is used to recycle some of the exhaust gas back into the induction manifold?
Exhaust gas re-circulation (EGR)
Turbocharging
Supercharging
Fuel injection
Why can't lead be used in vehicles with catalytic converters?
It is too expensive
It damages the converters
It increases fuel consumption
It reduces engine speed
What is a common solution to reduce NOx when the engine is under full load?
Increase fuel injection
Use of EGR system
Decrease engine size
Increase engine speed
What happens if the flame speed is too slow in an engine?
All fuel is burnt
Some of the charge remains unburnt
NOx levels decrease
Engine power increases
What is the effect of using a high compression ratio with a compact chamber?
Low flame speed
Excessively high temperature
Reduced NOx production
Increased fuel efficiency
What is the purpose of valves controlling the flow of exhaust gas?
To increase engine noise
To allow recirculation under full load
To decrease engine speed
To increase fuel consumption
What is a consequence of using long narrow chambers in engines?
Clean exhaust
Dirty exhaust
Increased fuel efficiency
Reduced engine noise
What is the purpose of the combustion chamber shape in an engine?
To increase the engine size
To prevent combustion knock
To reduce engine noise
To enhance the color of the engine
What type of fuel should the combustion chamber shape enable the engine to use?
High-octane fuel
Low-octane fuel
Diesel fuel
Biofuel
What is a challenging task for an engine designer according to the text?
Increasing engine size
Designing a combustion chamber for high power and good fuel economy
Reducing engine weight
Enhancing engine aesthetics
