Question

As per the National Building Code of India 2016, match the types of glass in Group-I with their corresponding descriptions in Group-II.

Group-I		Group-II
P	Reflective glass	1	Prefab unit of glass having an edge seal that binds the individual sheets together
Q	Tempered fire-resistant glass	2	Glass into which a wire mesh is embedded during production
R	Insulating glass units	3	Rolled glass having a distinct pattern on one or both sides
S	Wired glass	4	Glass with metallic coating reducing heat gain and glare and allowing optimum visible light transmission inside
		5	Glass that breaks into granular fragments, with no large sharp edges

• A. P - 5, Q - 4, R - 3, S - 2
• B. P - 4, Q - 2, R - 1, S - 3
• C. P - 4, Q - 5, R - 1, S - 2
• D. P - 1, Q - 5, R - 4, S - 3

Hint:

Match each glass type by its defining keyword: reflective = coating for heat and glare, tempered = granular breakage, insulating glass unit = sealed prefab unit, wired = embedded mesh.

Answer 1

The Correct Option is C

The National Building Code (NBC 2016) defines several glass types by how they are made and how they behave. We can solve this by picking one distinctive keyword per glass type and hunting for it in Group-II.

1. Reflective glass (P): the giveaway is a metallic coating that cuts heat gain and glare while still allowing light in, which is description 4.
2. Tempered fire-resistant glass (Q): the giveaway is how it fails, it breaks into granular fragments with no large sharp edges, which is description 5, the classic safe-breakage behaviour of toughened glass.
3. Insulating glass units (R): the giveaway is a prefab unit with an edge seal joining sheets, which is description 1, since an IGU is by definition a sealed multi-pane assembly.
4. Wired glass (S): the giveaway is the wire mesh embedded during production, which is description 2, matching the name directly.

That leaves description 3, rolled glass with a surface pattern, unused, since patterned glass is not one of the four Group-I terms. So the complete match is P - 4, Q - 5, R - 1, S - 2.

Let's summarize:

• Reflective glass carries a coating that controls heat and glare
• Tempered glass breaks in a granular, blunt pattern
• An insulating glass unit is a sealed multi-sheet assembly
• Wired glass has a mesh cast inside it

This confirms option (C), P - 4, Q - 5, R - 1, S - 2.