Which of the following statement is correct regarding 'Plywood' ?

I. A wood panel glued under pressure from an odd number of layers of veneers is known as plywood

II. BWR grade and MR grade is classification of plywood based on grade 

Concept:

Plywood is a manufactured wood panel made from thin sheets of wood veneer, known as plies. These plies are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another. This cross-graining technique gives plywood its strength and stability. Plywood is classified based on its resistance to water and moisture.

Statement I: "A wood panel glued under pressure from an odd number of layers of veneers is known as plywood."

• This statement is correct. Plywood is made from an odd number of layers of veneers glued under pressure, with each layer's grain rotated up to 90 degrees to the adjacent layers to enhance strength and stability.

Statement II: "BWR grade and MR grade is classification of plywood based on grade."

• This statement is correct. BWR (Boiling Water Resistant) grade and MR (Moisture Resistant) grade are classifications based on their resistance to water and moisture:
  • BWR Grade: Made with phenolic resins, suitable for environments exposed to moisture and water, used for exterior applications, kitchen cabinets, and bathroom furnishings.
  • MR Grade: Made with urea-formaldehyde resin, suitable for interior applications with minimal moisture exposure, used for furniture, paneling, and interior partitions.