1. The bricks which are table moulded and of standard shape and burnt in kilns are known as ____.
[A] First class bricks
[B] Second class bricks
[C] Third class bricks
[D] Fourth class bricks
Answer: Option A
2. Crushing strength of the first-class brick should not be less than _____.
[A] 14 N/mm^2
[B] 1 N/mm^2
[C] 10.5 N/mm^2
[D] 3 N/mm^2
Answer: Option C
3. The size of the standard modular brick is _____.
[A] 19 cm x 9 cm x 9 cm
[B] 20 cm x 9 cm x 9 cm
[C] 20 cm x 10 cm x 10 cm
[D] 20 cm x 10 cm x 9 cm
Answer: Option A
4. In manufacturing of bricks, which ingredient of clay is responsible for red colour of brick?
[A] Iron Oxide
[B] Lime
[C] Magnesia
[D] Alkaline
Answer: Option A
5. _____ impurities in the mixing water have the highest destructive effect for concrete.
[A] Algae
[B] Alkalies
[C] Calcium chloride
[D] Lead nitrate
Answer: Option D