True or False question 1) When inspecting or working on the exhaust system, remember that its components get very hot when the engine is running

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True or False question

1) When inspecting or working on the exhaust system, remember that its components get very hot when the engine is running. Contact with them could cause a severe burn. Also, always wear safety glasses or goggles when working under a vehicle?

True

or

False

2.    Some exhaust systems are designed with extractor pipes. These have one pipe for each exhaust port. The pipes are designed with long sweeps that prevent back pressure. They also provide a scavenging effect, which assists in extracting the exhaust gases from the cylinders, thereby increasing engine performance.

? True

or

? False

 

3.   The exhaust manifold collects the burnt gases as they are expelled from the cylinders and directs them to the exhaust pipe.

? True

or

? False

4. The tailpipe is the last pipe in the exhaust system. It releases the exhaust fumes into the atmosphere beyond the back end of the car.

? True

or

? False

 

5.   Heat shields are usually made of pressed or perforated sheet metal.

? True

or

? False

 

6.   Heat shields trap the heat in the exhaust system, which has a direct effect on maintaining exhaust gas velocity.

? True

or

? False

 

7.   Two types commonly used are the reverse-flow and the straight-through mufflers.

? True

or

? False

 

8.    Many cars use a double-wall exhaust pipe to better contain the sound and reduce pipe ring.

? True

or

? False

 

9.   Many mufflers are produced with drain holes drilled into them to allow condensation to drip out.

? True

or

? False

 

10.   The largest performance gain from using an exhaust headers is that it increases the engine's volumetric efficiency.

? True

or

? False

11.    A catalytic converter breaks down HC and CO to relatively harmless by-products.

? True

or

? False

12.   OBD-II regulation call for a monitoring system that looks at the effectiveness of the catalytic converter.

? True

or

? False

13.  A catalytic converter is part of the exhaust system and a very important part of the emission control system.

? True

or

? False

14.  A catalytic converter contains a ceramic element coated with a catalyst.

? True

or

? False

15.  A catalyst is a substance that causes a chemical reaction in other elements without actually becoming part of the chemical change and without being used up or consumed in the process.

? True

or

? False

16.  Exhaust leaks are often identified by sound, although very small leaks can be difficult to locate.

? True

or

? False

 17.   Most parts of the exhaust system, particularly the exhaust pipe, muffler, and tailpipe, are subject to rust, corrosion, and cracking.

? True

or

? False

18.  Broken or loose clamps and hangers can allow parts to separate or hit the road as the car moves causing vibrations.

? True

or

? False

19.    Excessive exhaust noise from the tailpipe can be due to a muffler or resonator in which the baffles have corroded so that they are no longer effective. 

? True

or

? False

20.    A restricted exhaust can be tested with an exhaust pressure gauge.

? True

or

? False

21.    Before replacing an exhaust system component, soaks all old connections with a penetrating oil.

? True

or

? False

22.    Checks the old system's routing for critical clearance points before replacing an exhaust system component.

? True

or

? False

23.    Most exhaust work involves the replacement of parts. When replacing exhaust parts, make sure the new parts are exact replacements for the original parts. Doing this will ensure proper fit and alignment as well as ensure acceptable noise levels.

? True

or

? False

24.    When installing exhaust gaskets, carefully follow the recommendations on the gasket package label and instruction forms.

? True

or

? False

25.    To replace an exhaust manifold gasket, follow the torque sequence in reverse to loosen each bolt. Repeat the process to remove the bolts. Doing this minimizes the chance that components will warp.

? True

or

? False