Aux 1 Unit 2 Q1

1 / 11

How is it typically ensured that an isolating valve in a ring fire main system will operate when required?

C) By installing a backup manual valve nearby

B) Through regular maintenance and testing

D) By using an automated control system

A) By keeping it in a partially open position

2 / 11

What is one key aspect of maintaining isolating valves to ensure they function in an emergency?

D) Ensuring the valve is electronically controlled

C) Periodically cycling the valve open and closed

A) Lubricating the valve's handle regularly

B) Keeping the valve fully open at all times

3 / 11

What is the main reason for using a gate valve in a ring fire main system?

D) It is lightweight and compact

A) It is easy to automate

B) It is less prone to corrosion

C) It provides minimal flow restriction when fully open

4 / 11

Why is the isolating valve for the machinery space positioned at the entrance to the space?

D) To ensure the valve remains at a consistent temperature

B) To reduce the length of pipe runs

A) To provide easy access in case of an emergency

C) To prevent unauthorized personnel from tampering with the valve

5 / 11

Where is the isolating valve for the machinery space typically located in a ring fire main system?

A) On the main deck near the fire pumps

C) On the bridge

D) Near the main seawater intake

B) At the entrance to the machinery space

6 / 11

Why is minimal flow restriction important in a fire main system?

D) To simplify the design of the fire main system

A) To ensure rapid response in the event of a fire

C) To prolong the life of the valve components

B) To reduce the energy consumption of the fire pumps

7 / 11

What is the primary purpose of fitting quick-closing valves on fuel oil tanks aboard a ship?

A) To increase water pressure throughout the system

C) To control the flow rate of fire-extinguishing agents

B) To allow sections of the fire main to be isolated for maintenance or in the event of damage

D) To reduce the temperature of the water in the fire main

8 / 11

Why is a gate valve preferred for isolating sections of a fire main system?

B) It can be quickly operated in emergencies

C) It provides a tight seal when fully closed, minimizing leakage

D) It is the most cost-effective option

A) It allows for fine control of water flow

9 / 11

Why are isolating valves necessary in a ring fire main system?

B) To ensure the fire main can be emptied when not in use

D) To regulate the temperature of the water within the system

C) To enable selective isolation of sections during repairs or emergencies

A) To maintain constant water flow at all times

10 / 11

Why are quick-closing valves fitted on tanks containing hazardous liquids, such as fuel oil or lubricating oil?

C) To automatically mix the liquids with water in case of an emergency

B) To quickly isolate the tanks and prevent spills or fires

A) To ensure the liquids remain at a constant temperature

D) To prevent the tanks from overfilling

11 / 11

Which type of valve is most commonly used for isolating sections of a ring fire main system?

D) Globe valve

B) Ball valve

A) Gate valve

C) Butterfly valve

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