Magnesite refractories are used for the construction of those furnaces, which are________?

A 25 cm × 25 cm × 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m × 1m × 1cm flat sheet of the same material is to be dried from one side only. Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is ________?

Which of the following is not a non-ferrous alloy?

As the impurities are oxidised, the melting point of iron________?

Pick out the wrong statement?

Which of the following is the lightest of engineering metals?