Building Materials problems
- 1. The rocks which are formed due to pouring of magma at the earth's surface are called
Options- A. Plutonic rocks
- B. Hypabyssal rocks
- C. Volcanic rocks
- D. Igneous rocks Discuss
Correct Answer: Volcanic rocks
- 2. Rapid hardening cement contains
Options- A. Tri-calcium silicate
- B. Tri-calcium aluminate
- C. Tetra-calcium alumino-ferrite
- D. Dicalcium silicate. Discuss
Correct Answer: Tri-calcium silicate
- 3. The cast iron when heated to red heat with powdered red haemetite in an oven for increasing its toughness, is converted to
Options- A. grey cast iron
- B. white cast iron
- C. mottled cast iron
- D. toughed cast iron. Discuss
Correct Answer: mottled cast iron
- 4. The cement becomes unsound by the presence of excess
Options- A. sulphur
- B. magnesia
- C. lime
- D. All of these. Discuss
Correct Answer: All of these.
- 5. In a rock calcium carbonate predominates. State whether it is :
Options- A. Sillicious rock
- B. Argillaceous rock
- C. Calcareous rock
- D. None of these. Discuss
Correct Answer: Calcareous rock
- 6. The most durable varnish is
Options- A. water varnish
- B. spirit varnish
- C. turpentine varnish
- D. oil varnish
- E. none of these. Discuss
Correct Answer: oil varnish
- 7. A volatile substance added to a paint to make its application easy and smooth, is known as
Options- A. base
- B. solvent
- C. vehicle
- D. none to these. Discuss
Correct Answer: solvent
- 8. Jhumb bricks are
Options- A. under burnt
- B. over burnt
- C. kutcha
- D. none of these. Discuss
Correct Answer: over burnt
- 9. For one cubic metre of brick masonry, number of bricks required, is
Options- A. 400
- B. 425
- C. 450
- D. 500
- E. 550. Discuss
Correct Answer: 500
- 10. Age of a tree may be ascertained by
Options- A. radius of its stem
- B. circumference of its stem
- C. number of branches
- D. number of annual rings. Discuss
Correct Answer: number of annual rings.
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