Consider the following statements regarding aluminium paint: 1. It is fairly good heat-resistant. 2. It possesses good electrical resistance. 3. It cannot be used for hot water pipe. Which of the statements given above is/are correct?

The correct answer is Option 3 (1 and 2). Aluminium paint is highly valued in engineering applications due to its unique physical and chemical properties.

• Statement 1 is correct: Aluminium paint consists of finely leafed aluminium flakes in a resinous base. These flakes reflect radiant heat, making the paint highly heat-resistant. It is commonly used on boilers, furnaces, and chimneys where surfaces are exposed to elevated temperatures.
• Statement 2 is correct: Aluminium is an excellent conductor, but in paint form, the metallic particles are suspended in an oil-based or synthetic varnish medium. This composition provides good electrical resistance (insulation properties), making it suitable for certain electrical equipment casings.
• Statement 3 is incorrect: Due to its excellent heat resistance and anti-corrosive properties, aluminium paint is extensively used for coating hot water pipes, oil storage tanks, and gas holders to prevent heat loss and corrosion.

Therefore, statements 1 and 2 are true, while statement 3 is false.