Concrete Technology Mock test – 5 || Civil Engineering Mock tests Welcome to your Concrete Technology Mock test - 5 Take an exciting test in Concrete Technology You have only 20 mins to complete the test (25 Questions) Wish you all the best!!! Name Email 1. Vicat's apparatus is used for (A) Fineness test (B) Consistency test (C) Setting time test (D) Soundness test2. The datum temperature for maturity by Plowman, is (A) 23°C (B) 0° (C) - 5.6°C (D) - 11.7°C3. For an ordinary Portland cement (A) Residual does not exceed 10% when sieved through IS Sieve No. 9 (B) Soundness varies from 5 to 10 mm (C) Initial setting time is not less than 30 minutes (D) Compressive stress after 7 days, is not less than 175 kg/cm24. The bulk density of aggregates, is generally expressed as (A) tonnes/cubic metre (B) kg/cubic metre (C) kg/litre (D) g/cm35. Slump test of concrete is a measure of its (A) Consistency (B) Compressive strength (C) Tensile strength (D) Impact value6. The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is (A) 1 : 2 : 4 (B) 1 : 3 : 6 (C) 1 : 1½ : 3 (D) 1 : 1 : 27. The grade of concrete not recommended by I.S. : 456, is (A) M 100 (B) M 200 (C) M 300 (D) M 5008. The operation of removing humps and hollows of uniform concrete surface, is known as (A) Floating (B) Screeding (C) Trowelling (D) Finishing9. Pick up the correct statement from the following: (A) Calcium chloride acts as a retarder (B) Calcium chloride acts as an accelerator (C) Gypsum (calcium sulphate) acts as a retarder (D) Both (b) and (c)10. If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is (A) 15,900 litres (B) 16,900 litres (C) 17,900 litres (D) 18,900 litres11. For concreting tunnel linings, transportation of concrete is done by (A) Pans (B) Wheel borrows (C) Containers (D) Pumps12. The most useless aggregate is one whose surface texture is (A) Smooth (B) Granular (C) Glassy (D) Honey combed and porous13. Slump test of concrete is a measure of its (A) Consistency (B) Compressive strength (C) Tensile strength (D) Impact value14. The ratio of the length to breadth of a wooden float, is (A) 4.5 (B) 5.5 (C) 6.5 (D) 7.515. An ordinary Portland cement when tested for its fineness, should not leave any residue on I.S. sieve No. 9, more than (A) 5 % (B) 10 % (C) 15% (D) 20 %16. The final operation of finishing floors, is known as (A) Screeding (B) Floating (C) Trowelling (D) Finishing17. The percentage of the aggregate of F.M. 2.6 to be combined with coarse aggregate of F.M. 6.8 for obtaining the aggregates of F.M. 5.4, is (A) 30 % (B) 40 % (C) 50% (D) 60 %18. Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is (A) 30 % (B) 40 % (C) 50% (D) 60 %19. The top diameter, bottom diameter and the height of a slump mould are: (A) 10 cm, 20 cm, 30 cm (B) 10 cm, 30 cm, 20 cm (C) 20 cm, 10 cm, 30 cm (D) 20 cm, 30 cm, 10 cm20. 1% of voids in a concrete mix would reduce its strength by about (A) 5 % (B) 10 % (C) 15% (D) 20 %21. The ratio of the diameter of reinforcing bars and the slab thickness is (A) 1/4 (B) 1/5 (C) 1/6 (D) 1/822. For a continuous slab of 3 m × 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is (A) 50 mm (B) 75 mm (C) 100 mm (D) 120 mm23. For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is (A) 1 : 3 : 6 (B) 1 : 1½ : 3 (C) 1 : 2 : 4 (D) 1 : 1 : 224. Transport of concrete by pumps, is done for a distance of (A) 100 m (B) 200 m (C) 300 m (D) 400 m25. Maximum percentage reinforcement in case of slabs is limited to (A) 2 (B) 4 (C) 6 (D) 8 Share to all