Answer :

Final answer:

The bursting pressure of a fire hose, suggested by the related safety standards, is approximately 200 psi or 23.7 atm, selecting option (a) as the correct answer.

Explanation:

The question about the bursting pressure of a fire hose touches on critical safety standards within firefighting equipment engineering. The provided reference information lists a safety factor for gas stored in a metal cylinder that should not fail until reaching 400 atmospheres. Relating this to fire hose standards, the closest listed option to this reference is 344 lb/in² or approximately 23.7 atm, which converts to option (a) 200 psi. This suggests that fire hoses are designed to withstand significant pressure to ensure safety and reliability during emergency use.

It's important to note that actual operational pressures for fire hoses during use will be much lower than the bursting pressure. The bursting pressure is a safety threshold to ensure the hose can handle unexpected surges or misuse without failing catastrophically. Selecting the correct option based on the information provided leads to 200 psi as the likely bursting pressure for a fire hose, ensuring a margin of safety for firefighters engaged in potentially hazardous situations.

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