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Q: Which of the following ingredients of bricks enables the brick to retain its shape and imparts durability, prevents shrinkage and warping?
  • A. Silica
  • B. Alumina
  • C. Lime
  • D. Magneisa
Correct Answer: Option A - Silica– It enables the brick to retain its shape and imparts durability, prevents shrinkage and warping. Alumina– Absorbs water and renders the clay plastic. Lime– Normally constitutes less than 10% clay. Magnesia– Rarely exceeding 1%, affects the colour and make the brick, yellow, in burning.
A. Silica– It enables the brick to retain its shape and imparts durability, prevents shrinkage and warping. Alumina– Absorbs water and renders the clay plastic. Lime– Normally constitutes less than 10% clay. Magnesia– Rarely exceeding 1%, affects the colour and make the brick, yellow, in burning.

Explanations:

Silica– It enables the brick to retain its shape and imparts durability, prevents shrinkage and warping. Alumina– Absorbs water and renders the clay plastic. Lime– Normally constitutes less than 10% clay. Magnesia– Rarely exceeding 1%, affects the colour and make the brick, yellow, in burning.