Aux 1 Unit 3 Q4

1 / 10

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

B) The stem

C) The valve seat and disc

D) The handwheel

A) The valve body

2 / 10

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

D) The bonnet

C) The valve disc or gate

A) The valve body

B) The valve seat

3 / 10

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

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

C) To ensure precise control of bilge water flow

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

D) To enhance the aesthetic appearance of the valve

4 / 10

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

B) Compatibility with bilge water and resistance to corrosion

C) Ease of manual operation

A) Aesthetic appearance

D) Ability to conduct electricity

5 / 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

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

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

B) To prevent it from closing accidentally during normal operations

6 / 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

C) Cast iron

D) Plastic

7 / 10

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

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

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

A) To regulate the flow of ballast water

C) To control the flow of fuel between tanks

8 / 10

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

B) It supports the valve body

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

A) It seals the valve to prevent leaks

D) It filters debris from the bilge water

9 / 10

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

A) To regulate the flow rate through the valve

D) To connect the valve to the bilge pump

C) To prevent backflow of water

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

10 / 10

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

A) Automatically by a control system

C) By a remote control system from the bridge

D) By a pressure sensor that detects water levels

B) Manually by turning a handwheel or lever

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