Bricks MCQ with answer and solution

Concept

Standard brick sizes defined by Indian Standards include both modular actual size and nominal size (including mortar).

Step-by-step solution

1. Understand the terminology: 'Actual size' refers to the brick alone, whereas 'Standard (Nominal) size' includes the thickness of mortar joints. 2. According to IS 1077, the standard modular brick size with mortar is 200 × 100 × 100 mm. 3. The actual size of the brick is 190 × 90 × 90 mm.

Explanation

According to the Bureau of Indian Standards (BIS) IS 1077, the standard (nominal) size of a modular brick including mortar thickness is 200 mm × 100 mm × 100 mm. The actual dimensions of the brick without mortar are 190 mm × 90 mm × 90 mm.

Why the other options are wrong

A: 190 × 90 × 90 mm is the actual size of the brick without mortar. C: These dimensions do not conform to Indian standard modular brick sizes. D: These dimensions are incorrect and do not match standard modular brick sizes.

Shortcut

Remember that adding a standard 10 mm mortar thickness to the actual dimensions (190×90×90) gives the nominal size (200×100×100).

Common mistake

Confusing 'actual size' (without mortar) with 'standard/nominal size' (with mortar).