Discussion
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- Question
Pick up the correct statement from the following:
Options- A. The free quartz suddenly expands at a temperature lower than 600°C
- B. The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2
- C. The sand stone with silicates resist a fire in a better way
- D. The argillaceous stone though poor in strength can resist fire quite weak
- E. All the above.
- Correct Answer
- All the above.
- 1. Bitumen paints offer
Options- A. pleasing surface
- B. hard surface
- C. smooth surface
- D. protective surface
- E. rough surface. Discuss
- 2. Brass is an alloy of
Options- A. copper and zinc
- B. zinc and lead
- C. tin and silver
- D. zinc and nickel
- E. tin and lead. Discuss
- 3. The lime which contains high percentage of calcium oxide, is generally called
Options- A. fat lime
- B. rich lime
- C. white lime
- D. none of these. Discuss
- 4. The most commonly used base for timber painting, is
Options- A. red lead
- B. zinc white
- C. white lead
- D. titanium white. Discuss
- 5. Teak wood is suitable for
Options- A. sports articles
- B. furnitures
- C. railway sleepers
- D. all the above. Discuss
- 6. Pick up the correct statement from the following:
Options- A. Styrene resin is produced from ethylene which is made from petroleum
- B. Styrene resin is light in weight
- C. Styrene resin transmits ultraviolet waves of light
- D. Styrene resin is used to manufacture utensils which are unaffected by chemicals
- E. All the above. Discuss
- 7. Most commonly used solvent in oil paints, is
Options- A. petroleum
- B. spirit
- C. coaltar
- D. turpentine. Discuss
- 8. Pick up the most favourable condition for the rapid growth of fungus for dry rot from the following:
Options- A. absence of sun light
- B. dampness
- C. presence of sap
- D. stagnant air
- E. All the above, Discuss
- 9. The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, is known
Options- A. declination
- B. azimuth
- C. dip
- D. bearing. Discuss
- 10. An ideal transition curve is
Options- A. cubic parabola
- B. cubic spiral
- C. clothoid spiral
- D. true spiral. Discuss
Building Materials problems
Search Results
Correct Answer: protective surface
Correct Answer: copper and zinc
Correct Answer: none of these.
Correct Answer: white lead
Correct Answer: furnitures
Correct Answer: All the above.
Correct Answer: petroleum
Correct Answer: All the above,
Correct Answer: dip
Correct Answer: clothoid spiral
Explanation:
IRC recommends Spiral or clothoid as the ideal transition curve due to following reasons:
1. It satisfies that rate of change of centrifugal acceleration is constant i.e., Ls.R = constant. Where Ls = length of transition curve R = radius of curve.
2. The calculation and field implementation of spiral curve is simple and easy.
3. It enhances aesthetics also.
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