OS Fire Fighting and Fire Prevention 3

Question 1

What type of fire is designated as Class C in the United States fire classification system?

Accepted Answer

Energized electrical equipment fires

Answer

Combustible metal fires such as magnesium or sodium

Answer

Flammable liquid and grease fires

Answer

Ordinary combustibles including wood and fabric

Question 2

When a fire alarm sounds in your berthing area, what is the proper immediate action for an ordinary seaman?

Accepted Answer

Don required gear and proceed to your assigned fire and emergency muster station

Answer

Search the berthing area for the source of the alarm before taking other action

Answer

Open portholes and vents to clear smoke from the compartment

Answer

Wait in your bunk for a follow-up announcement before moving

Question 3

During shipboard firefighting, which technique is used to apply water to walls, decks, and bulkheads adjacent to a burning compartment?

Accepted Answer

Boundary cooling — wetting surrounding structures to prevent fire spread

Answer

Direct attack — applying water directly into the flames

Answer

Foam blanketing — covering adjacent surfaces with foam

Answer

Smothering — sealing ventilation to starve the fire of oxygen

Question 4

According to maritime fire prevention regulations, where must portable fire extinguishers be located on a vessel?

Accepted Answer

At clearly marked, designated stations throughout the vessel and readily accessible

Answer

Only in the engine room where fires are most likely to occur

Answer

Stored in a locked compartment accessible only to officers

Answer

Only on the bridge and in the engine room control space

Question 5

What is the critical safety concern when a CO2 fixed flooding system is activated in a ship's engine room or cargo hold?

Accepted Answer

Persons remaining in the space may suffocate as CO2 displaces oxygen

Answer

CO2 reacts with fuel oil and may trigger a secondary explosion

Answer

CO2 rapidly corrodes metal surfaces and machinery components

Answer

The system causes flooding that can affect ship stability

Question 6

What does the term 'fire patrol' refer to in shipboard fire prevention duties?

Accepted Answer

Regular rounds made by crew to detect fire hazards or signs of fire

Answer

A scheduled inspection of fire extinguishers to check pressure gauges

Answer

The watch kept by firefighters standing by during hot work operations

Answer

A drill conducted to test the crew's response time to a fire alarm

Question 7

What precaution must be taken before using a CO2 extinguisher in a small enclosed space such as a pump room or void space?

Accepted Answer

Confirm all personnel have exited the space before discharging the CO2

Answer

Ensure the space is well ventilated by opening all access points first

Answer

Pre-cool the extinguisher in cold water for maximum discharge efficiency

Answer

Notify the engine room to reduce machinery speed before application