Question

________ can replace wood in cement bonded particle boards.
A. Rice straw
B. Glass
C. Wheat straw
D. Paper

Answer 1

Hint: Cement bonded particleboard is a board that has cement as the bonding material. Other materials used in its manufacturing are wood waste products. Sawdust, wood chips, wood shavings, and water are used. These boards are durable and fire-resistant boards. Thus, they are used in making fire-resistant furniture. The vegetative part of Oryza is sometimes used in place of wood.

Complete step-by-step answer:
The cement-bonded particle boards are fire-resistant, durable, and termite resistant materials. These are used in the manufacturing of resistant furniture, internal and external walls. They are also called Bison panels and are employed in permanent shuttering for concrete walls and floors. They are also used in making false ceilings. Due to cement content in these boards, they are more durable than any other particleboard. The composition of these boards is $60%$ cement, $20%$ wood waste particulates, and $20%$ water. Sometimes Rice straw or Oryza straw is used in place of wood. The cement-bonded particleboards constructed with rice straw are used as insulation boards. Rice straw is a preferred raw material as it is easily and widely available. The rice straw content ranges from $10/90, 20/80$ and $30/70$ weight of rice straw/wood particles of 10, 20, and 30 wt.$%$. A commercial urea-formaldehyde is used as an adhesive for a composite binder.

Hence, we can conclude that the right answer is option A.

Note: The special Bison particleboard is advanced cement-bonded particleboard consisting of $62%$ cement and $28%$ wood. The wood for this purpose is usually derived from fast-growing species like Eucalyptus and Popular. The wood used is light in weight but strong and easily machinable.