21. The trunk of tree left after cutting all the branches is known as_______________?
A. log
B. batten
C. plank
D. baulk
✅ The correct answer is option A.
Building Materials and Construction MCQs
22. The type of flooring suitable for use in churches, theatres, public libraries and other places where noiseless floor covering is desired is____________________?
A. cork flooring
B. glass flooring
C. wooden flooring
D. linoleum flooring
✅ The correct answer is option A.
23. The most common admixture which is used to accelerate the initial set of concrete is______________?
A. gypsum
B. calcium chloride
C. calcium carbonate
D. none of the above
✅ The correct answer is option B.
24. Assertion A : Shishum is used for decorative woodwork. Reason R : Shishum can be polished to an excellent finish. 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 A.
25. Percentage of carbon content in mild steel is_______________?
A. less than 0.25
B. between 0.25 and 0.7
C. between 0.7 and 1.5
D. greater than 1.5
✅ The correct answer is option A.
26. The stretcher bond in brick masonry can be used only when the thickness of wall is_____________?
A. 90 mm
B. 180 mm
C. 190 mm
D. 280 mm
✅ The correct answer is option A.
27. Slate is formed by metamorphic action on______________?
A. shale
B. lime stone
C. sand stone
D. granite
✅ The correct answer is option A.
28. Which of the following timbers is suitable for making sports goods ?
A. mulberry
B. mahogany
C. sal
D. deodar
✅ The correct answer is option A.
29. Depth or height of the arch is the________________?
A. perpendicular distance between intra-dos and extrados
B. vertical distance between springing line and intrados
C. perpendicular distance between springing line and extrados
D. none of the above
✅ The correct answer is option A.
30. A good building stone should not absorb water more than_____________?
A. 5%
B. 10%
C. 15%
D. 20%
✅ The correct answer is option A.