Which of the following statements is/are TRUE for Rubble Masonry? i. Rubble masonry is the simplest type of stone masonry. ii. Stones are used just as they are found in nature with no shaping or refining done before using them. iii. The joints in this masonry are wide because of the usage of irregular or unevenly shaped stones. iv. It is the most economical option in stone masonry because it uses unfinished stones.
- AOnly (i) and (ii)
- BOnly (i) and (iv)
- COnly (ii) and (iii)
- D(i), (ii), (iii) and (iv)Correct
Solution
Concept
Characteristics and features of rubble masonry
Formula
NONE
Step-by-step solution
1. Rubble masonry is the simplest form of stone masonry using irregular or un-dressed stones. Answer: D
Explanation
Rubble masonry uses rough, undressed stones straight from nature, making it the most economical and straightforward form of stone construction. Because of the irregular shapes of the stones, wider mortar joints are required to fill the voids during wall construction. Since all four statements accurately describe rubble masonry, option D is correct.
Why the other options are wrong
B) Statement (iv) is not included in the correct statement combination. C) Statement (i) is also true, making options (ii) and (iii) alone incomplete.
Shortcut
Rubble masonry uses cheap, raw, undressed stones with thick joints—simplest and most economical stone masonry.
Common mistake
Selecting option A or B by assuming statements regarding joint thickness or cost-effectiveness are incorrect.
Correct answer: D) (i), (ii), (iii) and (iv)