To prevent inadvertent leaks, bunker manifold not in use should:

Have blank flanges fitted with gaskets and tightened with some bolts in place

Have blank flanges fitted with gaskets and tightened with all bolts in place

Have blank flanges fitted and tightened with some bolts in place

Have blank flanges fitted and tightened with all bolts in place

I don't know

To prevent inadvertent leaks, bunker manifold not in use should have blank flanges fitted with gaskets and tightened with all bolts in place.

To prevent inadvertent leaks, the correct option would be to have blank flanges fitted with gaskets and tightened with all bolts in place.

To determine the correct option, let's understand the purpose of a bunker manifold and the importance of preventing inadvertent leaks.

A bunker manifold is a key component in the fuel supply system of a ship. It is responsible for transferring fuel from storage tanks to the ship's engines. Inadvertent leaks from the manifold can lead to serious safety risks, environmental pollution, and potential damage to the ship.

To prevent inadvertent leaks when the bunker manifold is not in use, it is necessary to isolate it properly. This is typically done by fitting blank flanges to seal off the openings of the manifold. A blank flange is a flat plate-like component that is bolted onto the openings of the manifold to prevent any flow of fuel or fluid.

Now, let's go through the options and determine which one is correct:

1. "Have blank flanges fitted with gaskets and tightened with some bolts in place" - This option suggests that the blank flanges should be fitted with gaskets (which provide a seal between the flange and manifold) and tightened with only some of the bolts in place.

2. "Have blank flanges fitted with gaskets and tightened with all bolts in place" - This option indicates that the blank flanges should be fitted with gaskets and tightened with all of the bolts in place.

3. "Have blank flanges fitted and tightened with some bolts in place" - This option suggests that the blank flanges should be fitted without gaskets and tightened with only some of the bolts in place.

4. "Have blank flanges fitted and tightened with all bolts in place" - This option indicates that the blank flanges should be fitted without gaskets and tightened with all of the bolts in place.

To ensure proper sealing and prevent inadvertent leaks, it is recommended to use gaskets with blank flanges. Additionally, to achieve a secure and effective seal, it is important to tighten all of the bolts in place.

Therefore, the correct option is: "Have blank flanges fitted with gaskets and tightened with all bolts in place."