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eq-21 which of the following is true of a carburetor backfire flame arrestor?
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A carburetor backfire flame arrestor is essential safety component for internal combustion engines, it prevents ignition of fuel vapors during backfire, protecting both engine and nearby individuals.

A carburetor backfire flame arrestor is a crucial safety component in internal combustion engines. Its primary function is to prevent the ignition of fuel vapors that may be emitted during a backfire, thus avoiding potential damage to the engine or harm to those nearby. This device essentially acts as a barrier between the carburetor and the air intake, allowing air to flow through while extinguishing any flames caused by a backfire. There are several key features of a carburetor backfire flame arrestor. First, it's designed to have a large surface area, typically constructed with metal mesh or perforated metal plates. This allows the arrestor to dissipate heat quickly, which is vital for extinguishing flames. Second, it should be regularly inspected and cleaned to maintain its effectiveness, as accumulated dirt and debris can reduce airflow and hinder its ability to prevent fires.

It is critical to ensure proper maintenance of this device to guarantee its optimal functioning. The first step of a four-stroke engine is intake. When the engine's intake valve opens, the piston draws the fuel-air combination into the cylinder by exerting downwardly directed negative pressure. In order to prepare the air-fuel mixture for the power stroke's ignition of fuel the piston compresses it. The piston begins its second rotation during combustion. High compression causes the spark plug to ignite the compressed air and fuel mixture. By turning the crankshaft during this stroke, the engine generates mechanical work. An engine exit is the exhaust. A number of gases, including greenhouse gases, are released by the stroke engine. The stroke engine has a high efficiency.

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