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- Question
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
Options- A. Cementation process
- B. Crucible process
- C. Bessemer process
- D. Open hearth process.
- Correct Answer
- Crucible process
- 1. Brittleness of cold is due to an excess of
Options- A. sulphur
- B. carbon
- C. phosphorus
- D. silicon. Discuss
- 2. Fibre glass
Options- A. retains heat-longer
- B. has a higher strength to weight ratio
- C. is shock proof and fire retardent
- D. does not decay
- E. all the above. Discuss
- 3. The variety of pig iron used for manufacture of wrought iron, is
Options- A. Bessemer pig
- B. Grey or foundry pig
- C. White forge pig
- D. Mottled pig. Discuss
- 4. Pick up the hypabyssal rock from the following:
Options- A. Granite
- B. Dolerite
- C. Basalt
- D. All the above. Discuss
- 5. Depending on the chemical composition and mechanical properties, iron may be classified as
Options- A. cast iron
- B. wrought iron
- C. steel
- D. all the above. Discuss
- 6. Kaolin is chemically classified as
Options- A. metamorphic rock
- B. argillaceous rock
- C. calcareous rock
- D. silicious rock. Discuss
- 7. Initial setting time of cement for asbestos cement products should be not less than
Options- A. 30 minutes
- B. 50 minutes
- C. 75 minutes
- D. 90 minutes. Discuss
- 8. The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called
Options- A. Plutonic rocks
- B. Hypabyssal rocks
- C. Volcanic rocks
- D. Igneous rocks. Discuss
- 9. For the manufacture of Portland cement, the proportions of raw materials used, are
Options- A. lime 63% ; silica 22% ; other ingredients 15%
- B. lime 22% ; silica 63% ; other ingredients 15%
- C. silica 40% ; lime 40% ; other ingredients 20%
- D. silica 70% ; lime 20% ; other ingredients 10%. Discuss
- 10. Ultimate strength to cement is provided by
Options- A. Tricalcium silicate
- B. Di-calcium silicate
- C. Tri-calcium aluminate
- D. Tetra calcium alumino ferrite. Discuss
Building Materials problems
Search Results
Correct Answer: phosphorus
Correct Answer: all the above.
Correct Answer: White forge pig
Correct Answer: Dolerite
Correct Answer: all the above.
Correct Answer: argillaceous rock
Correct Answer: 90 minutes.
Correct Answer: Plutonic rocks
Correct Answer: lime 63% ; silica 22% ; other ingredients 15%
Correct Answer: Di-calcium silicate
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