Exhaust System

Question 1

What are the 2 functions of the exhaust system?

Answer 1

1. Takes hot waste gases away from the engine

2. Reduces noise made the expanding gases

Question 2

3 main components of an exhaust

Answer 2

Manifold
Exhaust pipe
Silencer

Question 3

What is an exhaust pipe made from now?

Answer 3

Mild or stainless steel

Question 4

What is the most common type of silencer ?

Answer 4

Baffle

Question 5

2 types of noise to silence?

Answer 5

Low frequency -capacity

High frequency - absorption

Question 6

What is the wire/fibre material used for in a silencer ?

Answer 6

Absorbs high frequency noise

Question 7

What is a composite silencer ?

Answer 7

Small capacity silencer , silencer at the front, absorbai on at the rear

Question 8

How do we fasten the system together ?

Answer 8

Clamps and fasteners

Question 9

What is the purpose of a catalytic converter?

Answer 9

Reduce emissions below a level set by the manufacturer

Question 10

What are the 2 types of support materials in a catalytic converter

Answer 10

Substrate and wash coat

Question 11

What are the 3 types of manifolds ?

Answer 11

Siamese manifold
4 to 1 manifold
Cast manifold

Question 12

Symptoms of a bad catalytic converter

Answer 12

Error code from ems
Rotten egg smell
Hard starting 
Poor fuel economy 
Pool performance

Question 13

What is DPF?

Answer 13

Diesel particulate filter

Question 14

What is the purpose of a diesel particulate filter?

Answer 14

Removes soot that the burnt diesel produces

Question 15

What is regeneration of the DPF?

Answer 15

Burns off the soot