The type of ashlar masonry in which stones are finely chisel dressed and thickness of joints does not exceed 3 mm, is A. Chamfered ashlar masonry B. Ashlar facing masonry C. Random coursed ashlar masonry D. Coursed ashlar masonry

The correct answer is: A. Chamfered ashlar masonry.

Ashlar masonry is a type of masonry in which the stones are carefully cut and fitted together to form a smooth, even surface. Chamfered ashlar masonry is a type of ashlar masonry in which the edges of the stones are beveled, or chamfered, to create a more finished appearance. The thickness of the joints in chamfered ashlar masonry does not exceed 3 mm, which is much thinner than the joints in other types of ashlar masonry. This results in a very smooth, even surface that is both aesthetically pleasing and durable.

Here is a brief explanation of each option:

• Ashlar facing masonry is a type of ashlar masonry in which the stones are only exposed on the face of the wall, while the back of the wall is made of rubble or other less expensive materials.
• Random coursed ashlar masonry is a type of ashlar masonry in which the stones are laid in random courses, or rows, without any regular pattern.
• Coursed ashlar masonry is a type of ashlar masonry in which the stones are laid in regular courses, or rows.