CHIEF ENGINEER Unit 18 Q3

Correct Answer:
B) Displacement of oxygen

Explanation:
The fine mist created by high-pressure systems quickly evaporates, producing steam that displaces oxygen around the fire and effectively suppresses combustion.

Correct Answer:
B) The high-pressure creates a finer mist, which evaporates faster and absorbs heat more efficiently

Explanation:
The finer mist maximizes heat absorption, so less water is needed to achieve the same cooling effect as traditional systems.

Correct Answer:
B) By forming a mist barrier that blocks radiant heat

Explanation:
The mist barrier blocks radiant heat from reaching nearby objects, preventing them from igniting and containing the fire within a limited area.

Correct Answer:
B) Lower water damage to sensitive equipment

Explanation:
High-pressure water-mist systems use much less water, minimizing potential damage to electrical and sensitive equipment compared to traditional sprinklers.

Correct Answer:
A) It produces smaller water droplets that absorb heat more efficiently

Explanation:
The small droplets in high-pressure water-mist systems create a greater surface area for heat absorption, which cools the fire more effectively and uses less water than traditional sprinklers.

Correct Answer:
B) It quickly turns into steam, absorbing more heat and displacing oxygen

Explanation:
The small droplets in a high-pressure system turn to steam rapidly, enhancing heat absorption and creating a localized oxygen-depleted environment, which extinguishes the fire effectively.