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MCQs 1: The main ingredients of Portland cement are________________?

lime and silica lime and alumina silica and alumina lime and iron
Answer Explanation

MCQs 2: Le Chatelier’s device is used for determining the_______________?

setting time of cement soundness of cement tensile strength of cement compressive strength of cement
Answer Explanation

MCQs 3: The initial setting time for ordinary Portland cement as per IS specifications should not be less than_____________?

10 minutes 30 minutes 60 minutes 600 minutes
Answer Explanation

MCQs 4: The constituent of cement which is responsible for all the undesirable properties of cement is____________?

dicalcium silicate tricalcium silicate tricalcium aluminate tetra calcium alumino ferrite
Answer Explanation

MCQs 5: As per IS specifications, the maximum final setting time for ordinary Portland cement should be_______________?

30 minutes 1 hour 6 hours 10 hours
Answer Explanation

MCQs 6: Study the following statements. (1) Hydraulic lime is suitable for white washing, (2) Fat lime is suitable for whitewashing, (3) Hydraulic lime is suitable for making mortar, (4) Fat lime is suitable for making mortar. The correct answer is______________?

(1) and (4) (2) and (3) (1) and (2) (3) and (4)
Answer Explanation

MCQs 7: Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below ?

Both A and R are true and R is correct explanation of A Both A and R are true and R is not a correct explanation of A A is true but R is false A is false but R is true
Answer Explanation

MCQs 8: The main constituent which imparts hydraulicity to hydraulic lime is______________?

calcium oxide silica clay water
Answer Explanation

MCQs 9: The main constituent of cement which is responsible for initial setting of cement is_________________?

dicalcium silicate tricalcium silicate tricalcium aluminate all of the above
Answer Explanation

MCQs 10: For testing compressive strength of cement, the size of cube used is_______________?

50 mm 70.6 mm 100 mm 150 mm
Answer Explanation

MCQs 11: Early attainment of strength in rapid hardening cement is mainly due to_______________?

gypsum finer grinding tricalcium silicate tricalcium aluminate
Answer Explanation

MCQs 12: According to IS specifications, the compressive strength of ordinary portland cement after three days should not be less than________________?

7 MPa 11.5 MPa 16 MPa 21 MPa
Answer Explanation

MCQs 13: With increase in moisture content, the bulking of sand_______________?

increases decreases first increases to a certain maximum value and then decreases first decreases to a certain minimum value and then increases
Answer Explanation

MCQs 14: Addition of pozzolana to ordinary Portland cement increases__________________?

bleeding shrinkage permeability heat of hydration
Answer Explanation

MCQs 15: The slump recommended for mass concrete is about_______________?

25 mm to 50 mm 50 mm to 100 mm 100 mm to 125 mm 125 mm to 150 mm
Answer Explanation

MCQs 16: After storage, the strength of cement________________?

decreases increases remains same may increase or decrease
Answer Explanation

MCQs 17: The normal consistency of ordinary Portland cement is about________________?

10% 20% 30% 40%
Answer Explanation

MCQs 18: Gypsum consists of______________?

H2S and C02 CaS04 and H20 Lime and H20 C02 and calcium
Answer Explanation

MCQs 19: For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of___________________?

1:2 1:3 1:4 1:6
Answer Explanation

MCQs 20: Which of the following cements is suitable for use in massive concrete structures such as large dams ?

ordinary Portland cement low heat cement rapid hardening cement sulphate resisting cement
Answer Explanation

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