Exhaust systems - Level 1

Which of these is NOT a purpose of an exhaust system?

• Reduce engine noise

• Reduce harmful emissions

• Reduce performance and increase fuel consumption

• Direct gases away from the passenger compartment

What is this component?

Reorder the following exhaust components working from the engine to the end of the system

• 
• 
• 
• 
• 

Organize these exhaust components into the right categories

Groups:

(a) Emissions Reducing

,

(b) Noise cancelling

,

(c) Pipework

• Front section including flexi

• Diesel Particulate Filter

• Middle box

• Manifold

• SCR equipment

• Capacity type

• Expansion type

• Tailpipe

• Petrol Particulate Filter

• Back box

• Catalytic Converter

• Absorbtion type

Expansion type/Capacity type silencers are designed to handle the ​ ​ (a)   frequency soundwaves. Where as Absorption type silencers are designed to handle the ​ (b)   frequency soundwaves.

• Low
• High
• Mid

SCR equipment is found on modern vehicles and prevent harmful contaminants from damaging the environment. SCR stands for ​ (a)   ​ (b)   ​ (c)   ​ ​

• Selective
• Catalyst
• Reduction
• Standard
• Specialist
• Catalytic
• Contaminants
• Regulations
• redundant

Catalytic Converters reduce harmful emissions. However, which of these emissions are the ones checked for on an MOT test​ after 1st August 1992

Groups:

(a) MOT test

,

(b) not on MOT test

• Sulphur Dioxide

• Water

• Hydrocarbons (HC)

• Nitrogen

• Particulate Matter (PM)

• Carbon Dioxide (CO2)

• Heat

• Oxides of Nitrogen (NOx)

• Noise

• Carbon Monoxide (CO)