66 Construction Materials Chapter Wise McQ Test of 25 Question #13 Construction Materials Chapter Wise McQ Test of 25 Question for PSC, NEC, UPSC, SSC and Many more. 1 / 25 1. The soil good for making bricks is A. Clay soil (silica and alumina) B. Alluvial C. Silt D. Sand and silt 2 / 25 2. A brick is a block of ……….. material. A. dusty B. organic C. ceramic D. loamy 3 / 25 3. The weight of 1 m3 of brick earth, is about A. 1200 kg B. 1500 kg C. 1800 kg D. 2000 kg 4 / 25 4. A good brick earth should contain: A. about 20% to 30% of alumina B. about 50% to 60% of silica C. not more than 5% of lime D. All of the above 5 / 25 5. Clay and silt content in a good brick earth must be at least A. 50% B. 40% C. 30% D. 20% 6 / 25 6. The ingredient of the brick earth which enables the brick to retain shape is A. Aluminium B. Silica C. Iron oxide D. magnesia 7 / 25 7. Percentage of silica in good brick earth should lie between A. 10-20% B. 20-40% C. 50-60% D. None of above 8 / 25 8. The percentage of silica in a good brick earth lies between A. 5 to 10% B. 20 to 30% C. 50 to 60% D. 70 to 80% 9 / 25 9. The presence of sand in brick earth prevents: A. cracking of bricks B. shrinkage of bricks C. warping of bricks D. none of these 10 / 25 10. Excess of silica in brick earth results in A. cracking and warping of brick B. loss of cohesion C. enhancing the impermeability of bricks D. none of the above 11 / 25 11. Excess of silica in brick earth causes A. Loss of cohesion B. Impermeable C. Cracking and warping on drying D. brittleness 12 / 25 12. Percentage of alumina in good brick earth should lie between A. 10-20% B. 20-30% C. 30-40% D. 40-50% 13 / 25 13. The percentage of alumina in a good brick earth lies between A. 5 to 10% B. 20 to 30% C. 50 to 60% D. 70 to 80% 14 / 25 14. The main function of alumina in brick earth is A. To impart plasticity B. To increase durability C. To prevent shrinkage D. To increase impermeability 15 / 25 15. Excess of alumina in brick earth causes A. Loss of cohesion B. Impermeable C. Cracking and warping on drying D. brittleness 16 / 25 16. Excess of alumina in brick earth makes the brick A. impermeable B. brittle and weak C. to lose cohesion D. to crack and warp on drying 17 / 25 17. Percentage of lime on good brick earth should be A. less than 10% B. more than 10% C. less than 7% D. more than 7% 18 / 25 18. Lime is mixed with brick earth A. To impart plasticity B. To increase durability C. To prevent shrinkage D. To increase impermeability 19 / 25 19. Excess alumina in brick earth causes the brick A. brittle and weak B. cracks on burning C. reduce shrinkage D. causes efflorescence 20 / 25 20. Which of the following constituent, when present in excess quantity in clay causes the bricks to melt and distort during burning? A. Alumina B. Silica C. Lime D. Alkalies 21 / 25 21. Efflorescence in brick is caused due to an excess of A. Alumina B. Iron oxide C. Silica D. alkalis 22 / 25 22. The red colour obtained by the bricks is due to the presence of A. Lime B. Silica C. Manganese D. Iron oxide 23 / 25 23. Excess of iron oxide in brick earth causes A. Loss of cohesion B. Decay of bricks C. The colour change i.e. fromred to dark blue D. None of above 24 / 25 24. The principle constituents of good brick earth are A. alumina B. silica C. lime D. alkalies 25 / 25 25. Which of the following is harmful/undesirable matter in brick earth A. carbonaceous matter B. excess water C. Sulphur D. all of above Your score is The average score is 64% 0% Restart quiz Exit civil engineerloksewamcqcivilmock testpscsub engineerupsc
