Aux 1 Unit 3 Q4

1 / 10

What is the primary function of a bilge injection (emergency bilge) valve on a ship?

C) To control the flow of fuel between tanks

D) To prevent the backflow of seawater into the engine room

B) To allow direct discharge of bilge water overboard in an emergency

A) To regulate the flow of ballast water

2 / 10

Which component of the bilge injection valve controls the flow of bilge water?

D) The bonnet

B) The valve seat

A) The valve body

C) The valve disc or gate

3 / 10

In an emergency situation, how is the bilge injection valve typically operated?

A) Automatically by a control system

B) Manually by turning a handwheel or lever

C) By a remote control system from the bridge

D) By a pressure sensor that detects water levels

4 / 10

In a typical bilge injection valve, what material is most commonly used for the valve seat to ensure durability and corrosion resistance?

B) Stainless steel

A) Brass

D) Plastic

C) Cast iron

5 / 10

What is the purpose of the bonnet in a bilge injection valve?

B) To house and protect the valve's internal components

C) To prevent backflow of water

A) To regulate the flow rate through the valve

D) To connect the valve to the bilge pump

6 / 10

Why is it important that a bilge injection valve is designed to be fail-safe?

A) To ensure it automatically opens when there is a fire

B) To prevent it from closing accidentally during normal operations

C) To ensure it remains operational during emergency conditions, such as flooding

D) To make it easier to install on the ship's hull

7 / 10

Why is it important for the bilge injection valve to have a strong and durable valve body?

C) To ensure precise control of bilge water flow

B) To reduce the weight of the valve and make it easier to operate

D) To enhance the aesthetic appearance of the valve

A) To withstand the high pressures and potential impact forces in an emergency

8 / 10

In a bilge injection valve, what role does the stem play?

C) It opens and closes the valve by moving the disc or gate

D) It filters debris from the bilge water

A) It seals the valve to prevent leaks

B) It supports the valve body

9 / 10

Which part of the bilge injection valve ensures a tight seal to prevent leakage when the valve is closed?

C) The valve seat and disc

B) The stem

A) The valve body

D) The handwheel

10 / 10

What is a key consideration when selecting materials for the construction of a bilge injection valve?

C) Ease of manual operation

B) Compatibility with bilge water and resistance to corrosion

D) Ability to conduct electricity

A) Aesthetic appearance

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