Discussion
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- Question
In the method of condensation polymerization,
Options- A. low-molecular substances are removed from the high molecular substance
- B. the reaction proceeds with an evolution of ammonia
- C. the reaction proceeds with an evolution of hydrogen chloride
- D. all the above.
- Correct Answer
- all the above.
- 1. Elastomers can extend upto
Options- A. five times their original dimensions
- B. seven times their original dimensions
- C. ten times their original dimensions
- D. three times their original dimensions. Discuss
- 2. Due to attack of dry rot, the timber
Options- A. cracks
- B. shrinks
- C. reduces to powder
- D. none of these. Discuss
- 3. The main constituent of fly-ash, is
Options- A. aluminium oxide
- B. silica
- C. ferrous oxide
- D. All of these. Discuss
- 4. Vanadium steel is generally used for
Options- A. railway switches and crossing
- B. bearing balls
- C. magnets
- D. axles and springs. Discuss
- 5. Pick up the polymineralic rock from the following:
Options- A. Quartz sand
- B. Pure gypsum
- C. Magnesite
- D. Granite
- E. None of these. Discuss
- 6. Asbestos cement
Options- A. is brittle
- B. warps due to changes in humidity
- C. strength is lowered when saturated by water
- D. all the above. Discuss
- 7. 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
- 8. Pick up the hypabyssal rock from the following:
Options- A. Granite
- B. Dolerite
- C. Basalt
- D. All the above. Discuss
- 9. 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
- 10. 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
Building Materials problems
Search Results
Correct Answer: ten times their original dimensions
Correct Answer: reduces to powder
Correct Answer: All of these.
Correct Answer: axles and springs.
Correct Answer: Granite
Correct Answer: all the above.
Correct Answer: all the above.
Correct Answer: Dolerite
Correct Answer: White forge pig
Correct Answer: all the above.
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