AURTTZ002 - Diagnose and repair exhaust systems

When replacing an exhaust system or components, why is it necessary to use parts that meet required Australian design rules (ADR) for road-registered vehicles?

• To enhance the vehicle's performance
• To improve the vehicle's sound quality
• To ensure compliance with safety and environmental standards set by the government.
• To increase the vehicle's resale value

  When fitting or aligning an exhaust system where do you start from?

• Aligning the exhaust manifold to the engine block
• Connecting the exhaust to the steering wheel
• Starting from the rear bumper
• Aligning the exhaust pipe to the windshield

  Why is it important to align an exhaust system?

• To increase fuel consumption
• To avoid contact with the vehicle body

• To make the exhaust system more visible
• To reduce fuel consumption

How can you diagnose an exhaust system for blockages?

• Visual inspection, pressure gauge measurement, and backpressure test are methods to diagnose exhaust system blockages.

• Road test

• Touching the exhaust pipe
• Listening for unusual sounds

Which is the best option to locate the source of vibration and noise issues in the exhaust?

• Visually inspect the exhaust system

• Road test

• Do a physical inspection

• All options are correct

An exhaust system that reduces the flow ability of exhaust gases has which of the following effects?

• Improves engine performance and improve scavenging of exhaust gasses

• It will create a rise in back-pressure reducing cylinder exhaust scavenging

• Increases engine performance and fuel efficiency
• Has no impact on engine performance or fuel efficiency

How does the design of an exhaust manifold help the scavenging effect of the exhaust pressure pulses?

• By decreasing the length of the exhaust manifold to reduce the effect of pressure pulses.
• By reducing the temperature of the exhaust gases to increase their density.
• By properly timing the opening and closing of exhaust valves to create pressure pulses that aid in pulling out exhaust gases from the combustion chamber.
• By increasing the exhaust backpressure to trap exhaust gases in the combustion chamber.

How can you reduce the toxic fumes from vehicles in the workshop.​ (a)   ​ ​ ​ ​ (b)  

• Use fume extraction system
• Open doors and windows except when it is cold
• Run vehicles for as short a time as possible

What are some methods for checking and locating exhaust leaks?

Select all that apply.

• Listening for unusual noises

• Visually inspecting the exhaust system

• Performing a smoke test

• Checking tyre pressure

How can you check for exhaust leaks?

• By listening for unusual noises such as hissing or popping sounds coming from the exhaust system

• By checking the air pressure of tyres

• By inspecting the turbo

• By testing the air conditioning system

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