Aux 1 Unit 2 Q1

1 / 11

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

C) Butterfly valve

D) Globe valve

A) Gate valve

B) Ball valve

2 / 11

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

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

B) To reduce the energy consumption of the fire pumps

D) To simplify the design of the fire main system

C) To prolong the life of the valve components

3 / 11

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

A) By keeping it in a partially open position

D) By using an automated control system

C) By installing a backup manual valve nearby

B) Through regular maintenance and testing

4 / 11

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

D) To prevent the tanks from overfilling

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

A) To ensure the liquids remain at a constant temperature

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

5 / 11

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

A) It allows for fine control of water flow

D) It is the most cost-effective option

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

B) It can be quickly operated in emergencies

6 / 11

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

B) It is less prone to corrosion

C) It provides minimal flow restriction when fully open

D) It is lightweight and compact

A) It is easy to automate

7 / 11

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

A) To provide easy access in case of an emergency

C) To prevent unauthorized personnel from tampering with the valve

B) To reduce the length of pipe runs

D) To ensure the valve remains at a consistent temperature

8 / 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

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

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

A) To maintain constant water flow at all times

9 / 11

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

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

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

A) To increase water pressure throughout the system

10 / 11

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

C) On the bridge

A) On the main deck near the fire pumps

B) At the entrance to the machinery space

D) Near the main seawater intake

11 / 11

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

D) Ensuring the valve is electronically controlled

A) Lubricating the valve's handle regularly

B) Keeping the valve fully open at all times

C) Periodically cycling the valve open and closed

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