Bricks MCQ with answer and solution

Concept

The standard modular burnt clay brick size is 19 × 9 × 9 cm. With 1 cm mortar it becomes the nominal size 20 × 10 × 10 cm.

Step-by-step solution

1. Recall the actual size of the modular brick: 190 × 90 × 90 mm. 2. Add 10 mm mortar joint to get the nominal size: 200 × 100 × 100 mm. 3. So the actual size is 19 cm × 9 cm × 9 cm, which is option A.

Explanation

IS 1077 gives the modular brick size as 19 × 9 × 9 cm. Adding a 1 cm mortar joint gives the nominal size of 20 × 10 × 10 cm. A half-height brick of 19 × 9 × 4 cm is also allowed.

Shortcut

Remember: actual 19 × 9 × 9 cm, nominal 20 × 10 × 10 cm.

Common mistake

Mixing up the actual size (19 × 9 × 9 cm) with the nominal size (20 × 10 × 10 cm), or with the old traditional size (about 23 × 11.4 × 7.6 cm).