The nominal thickness of one brick wall in mm, is A. 90 mm B. 150 mm C. 190 mm D. 200 mm

90 mm
150 mm
190 mm
200 mm

The correct answer is B. 150 mm.

A brick wall is a masonry wall made of bricks. Bricks are typically rectangular in shape and have a nominal thickness of 150 mm. The nominal thickness of a brick wall is the thickness of the individual bricks that make up the wall. The actual thickness of a brick wall may vary depending on the type of bricks used, the mortar used to join the bricks, and the method of construction.

Option A is incorrect because the nominal thickness of a brick is 150 mm, not 90 mm.

Option C is incorrect because the nominal thickness of a brick is 150 mm, not 190 mm.

Option D is incorrect because the nominal thickness of a brick is 150 mm, not 200 mm.