51. Which of the following metamorphic rocks has the most weather resisting characteristics ?
A. marble
B. quartzite
C. slate
D. lime stone
✅ The correct answer is option B.
Building Materials and Construction MCQs
52. 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______________?
A. (1) and (4)
B. (2) and (3)
C. (1) and (2)
D. (3) and (4)
✅ The correct answer is option B.
53. Gypsum consists of______________?
A. H2S and C02
B. CaS04 and H20
C. Lime and H20
D. C02 and calcium
✅ The correct answer is option B.
54. Early attainment of strength in rapid hardening cement is mainly due to_______________?
A. gypsum
B. finer grinding
C. tricalcium silicate
D. tricalcium aluminate
✅ The correct answer is option B.
55. Sum of tread and rise must lie between_______________?
A. 300 to 350 mm
B. 400 to 450 mm
C. 500 to 550 mm
D. 600 to 650 mm
✅ The correct answer is option B.
56. Assertion A : Normally turpentine oil is recommended as thinner for indoor painting. Reason R : Turpentine oil is costlier than other thinners. Select your answer according to the coding system given below ?
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
✅ The correct answer is option B.
57. The initial setting time for ordinary Portland cement as per IS specifications should not be less than_____________?
A. 10 minutes
B. 30 minutes
C. 60 minutes
D. 600 minutes
✅ The correct answer is option B.
58. The moisture content in a well seasoned timber is_______________?
A. 4% to 6%
B. 10% to 12%
C. 15% to 20%
D. 100%
✅ The correct answer is option B.
59. Which of the following ingredients of the brick earth enables the brick to retain its shape ?
A. alumina
B. silica
C. iron
D. magnesia
✅ The correct answer is option B.
60. The triangular space formed between the extrados and the horizontal line drawn through the crown of an arch is known as_____________________?
A. haunch
B. spandril
C. voussoirs
D. skewbacks
✅ The correct answer is option B.