Which Substance Is Non-Destructive in the Ozone Layer

question 7

Multiple Choice

Which substance is non-destructive in the ozone layer? 

• A) CFCs 
• B) methyl bromide 
• C) halons 
• D) PCBs

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Definitions:

Running Compression Test

A compression test done at running rpm to check the breathing ability of the engine, specifically to see if the valve train is opening and closing the valves sufficiently.

Piston Slap

A condition where there is excessive lateral movement of the piston within its cylinder, leading to a knocking noise.

Head Gasket

A critical sealing component located between the engine block and cylinder head in an internal combustion engine, preventing leakage of coolant or oil into the cylinders.

White Exhaust Smoke

Emission indicative of coolant entering the combustion chamber, often due to a blown head gasket or cracked engine block.