If the exhaust manifold on a vehicle is rusty, what should Be done?

Question:

If the exhaust manifold on a vehicle is rusty, what should be done?

Answer:

Sandblasting is the appropriate method for dealing with a rusty exhaust manifold, as it effectively removes rust, allowing for protective measures to be taken.

Explanation:

If the exhaust manifold on a vehicle is rusty, the correct course of action would generally be sandblasting. Rust on an exhaust manifold indicates that a chemical reaction has occurred, where the iron in the metal has reacted with oxygen and moisture to form iron oxide. The best way to remove this rust is through sandblasting, which will clean the surface and prepare it for further protection, such as painting or the application of a high-temperature resistant coating.

With reference to exercise 7.2.1, the correct answer to which of the following is a chemical reaction is option b. A bicycle rusting. This is because rusting is a chemical process where iron reacts with oxygen in the presence of water or moisture to form iron oxide. Option a, painting a wall blue, c, ice cream melting, d, scratching a key across a desk, and e, making a sandcastle, do not involve chemical reactions, but are rather physical processes or actions.