Concrete Technology Mock test – 4 || Civil Engineering Mock tests Welcome to your Concrete Technology Mock test - 4 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) Water cement ratio is generally expressed in volume of water required per A. 10 kg B. 20 kg C. 30 kg D. 40 kg E. 50 kg2) An aggregate which passes through 25 mm I.S. sieve and is retained on 20 mm sieve, is said to be flaky if its least dimension is less than A. 22.5 mm B. 18.5 mm C. 16.5 mm D. 15.5 mm E. 13.5 mm.3) Gypsum is added for A. colour B. strength C. controlling setting time D. none of these.4) Sand requiring a high water cement ratio, belongs to A. lime stone and clay B. gypsum and lime C. pozzolana D. lime, pozzolana and clay.5) A flaky aggregate is said to be elongated if its length is A. equal to the mean size B. twice the mean size C. thrice the mean size D. four times the mean size6) If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270 cm, the number of cement bags to be stored, is A. 2000 bags B. 2200 bags C. 2400 bags D. 2700 bags7) If aggregates completely pass through a sieve of size 75 mm and are retained on a sieve of size 60 mm, the particular aggregate will be flaky if its minimum dimension is less than A. 20.5 mm B. 30.5 mm C. 40.5 mm D. 50.5 mm8) To prevent segregation, the maximum height for placing concrete, is A. 100 cm B. 125 cm C. 150 cm D. 200 cm9) The dimensions of a 35 litre forma for measuring aggregates by volume, are : A. length 30 cm, breadth 25 cm, height 30 cm B. length 39 cm, breadth 25 cm, height 32 cm C. length 27 cm, breadth 27 cm, height 48 cm D. length 220 cm, breadth 25 cm, height 40 cm10) Expansion joints are provided if the length of concrete structures exceeds A. 10 m B. 15 m C. 15 m D. 35 m E. 45 m11) Cement used for normal concrete construction, is obtained by burning a mixture of A. silicious and argillaceous materials B. argilaceous and calcareous materials C. silicious and catcareous materials D. silicious, argillaceous and calcareous materials12) Pick up the incorrect statement from the following: A. Admixtures accelerate hydration B. Admixtures make concrete water proof C. Admixtures make concrete acid proof D. Admixtures give high strength13) Pick up the incorrect statement from the following. While performing preliminary test on concrete A. proportions of the material and water should be the same as to be used at the work site B. cement should be mixed by hand in order to maintain uniformity C. concrete mix should be stored in air-tight containers D. concrete ingredients should be kept at a temperature of 37° ± 2°C14) Log Angles machine is used to test the aggregate for A. crushing strength B. impact value C. abrasion resistance D. water absorption15) Pick up the incorrect statement from the following: A. Tricalcium silicate (C3S) hydrates rapidly B. Tricalcium silicate (C3S) generates more heat of hydration C. Tricalcium silicate (C3S) develops early strength D. Tricalcium silicate (C3S) has more resistance to sulphate attack16) The shuttering of a hall measuring 4 m x 5 m, can be removed after A. 5 days B. 7 days C. 10 days D. 14 days17) A concrete having a slump of 6.5 cm, is said to be A. dry B. earth moist C. semi-plastic D. plastic18) The entrained air in concrete A. increases workability B. decreases workability C. decreases resistance to weathering D. increases strength19) Setting time of cement increases by adding A. gypsum B. hydrogen peroxide C. calcium chloride D. sodium oxide20) The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than A. 30 minutes B. 40 minutes C. 60 minutes D. 75 minutes21) If the slump of a concrete mix is 60 mm, its workability is A. very low B. low C. medium D. high22) Strength of concrete with passage of time A. increases B. decreases C. fluctuates D. remains constant.23) If 50 kg of fine aggregates and 100 kg of coarse agregates are mixed in a concrete whose water cement ratio is 0.6, the weight of water required for harsh mix, is A. 8 kg B. 10 kg C. 12 kg D. 14 kg24) If fineness modulus of sand is 2.5, it is graded as A. very fine sand B. fine sand C. medium sand D. coarse sand25) Higher workability of concrete is required if the structure is A. made with cement concrete B. thick and reinfored C. thin and heavily reinforced D. thick and heavily reinfored.