BUILDING MATERIALS MCQS SET 34

BUILDING MATERIALS MCQS SET 34

1. Second class bricks
(A) Are of dark brown colour
(B) Produce a metallic sound when struck
(C) Are well burnt
(D) Are under burnt
Answer: Option B

2. Wrought iron contains carbon upto
(A) 0.25 %
(B) 1.0 %
(C) 1.5 %
(D) 2 %
Answer: Option A

3. The variety of pig iron used for manufacture of wrought iron, is
(A) Bessemer pig
(B) Grey or foundry pig
(C) White forge pig 
(D) Mottled pig
Answer: Option C

4. Kaolin is chemically classified as
(A) Metamorphic rock
(B) Argillaceous rock
(C) Calcareous rock
(D) Siliceous rock
Answer: Option B

5. Sewer pipes are made of
(A) Earthen ware
(B) Stone ware
(C) Refractory clay
(D) All the above
Answer: Option B

6. The process of manufacturing steel by heating short lengths of wrought iron bars mixed with
charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as
(A) Cementation process
(B) Crucible process
(C) Bessemer process
(D) Open hearth process
Answer: Option B

7. The rock generally used for roofing, is
(A) Granite
(B) Basalt
(C) Slate
(D) Pumice
Answer: Option C

8. The lime which contains mainly calcium oxide and slacks with water, is
(A) Fat lime
(B) Quick lime
(C) Hydraulic lime
(D) Poor lime
Answer: Option B

9. The standard size of masonry bricks, is
(A) 18 cm × 8 cm × 8 cm
(B) 19 cm × 9 cm × 9 cm
(C) 20 cm × 10 cm × 10 cm
(D) 21 cm × 11 cm × 11 cm
Answer: Option B

10. The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
(A) 15, 75, 10
(B) 75, 10, 15
(C) 10, 15, 75
(D) 10, 75, 15
Answer: Option A