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) Slump test of concrete is a measure of its (A) Consistency (B) Compressive strength (C) Tensile strength (D) Impact value2) 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 : 23) 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 ratio of the diameter of reinforcing bars and the slab thickness is (A) 1/4 (B) 1/5 (C) 1/6 (D) 1/85) 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 litres6) Maximum percentage reinforcement in case of slabs is limited to (A) 2 (B) 4 (C) 6 (D) 87) 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 : 28) The bulk density of aggregates, is generally expressed as (A) tonnes/cubic metre (B) kg/cubic metre (C) kg/litre (D) g/cm39) Slump test of concrete is a measure of its (A) Consistency (B) Compressive strength (C) Tensile strength (D) Impact value10) 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 mm11) Transport of concrete by pumps, is done for a distance of (A) 100 m (B) 200 m (C) 300 m (D) 400 m12) 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 %13) The most useless aggregate is one whose surface texture is (A) Smooth (B) Granular (C) Glassy (D) Honey combed and porous14) Vicat's apparatus is used for (A) Fineness test (B) Consistency test (C) Setting time test (D) Soundness test15) For concreting tunnel linings, transportation of concrete is done by (A) Pans (B) Wheel borrows (C) Containers (D) Pumps16) The datum temperature for maturity by Plowman, is (A) 23°C (B) 0° (C) - 5.6°C (D) - 11.7°C17) The final operation of finishing floors, is known as (A) Screeding (B) Floating (C) Trowelling (D) Finishing18) 1% of voids in a concrete mix would reduce its strength by about (A) 5 % (B) 10 % (C) 15% (D) 20 %19) 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)20) The operation of removing humps and hollows of uniform concrete surface, is known as (A) Floating (B) Screeding (C) Trowelling (D) Finishing21) Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is (A) 30 % (B) 40 % (C) 50% (D) 60 %22) The grade of concrete not recommended by I.S. : 456, is (A) M 100 (B) M 200 (C) M 300 (D) M 50023) 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 cm24) The ratio of the length to breadth of a wooden float, is (A) 4.5 (B) 5.5 (C) 6.5 (D) 7.525) 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 %