The asbestos cement pipes are generally laid A. Horizontally B. Vertically C. At an angle of 30° D. At an angle of 60°

The correct answer is A. Horizontally.

Asbestos cement pipes are generally laid horizontally because they are designed to carry water or other fluids in a horizontal direction. They are also relatively lightweight and easy to install, which makes them a good choice for horizontal applications.

Vertically laid asbestos cement pipes are not as common, but they can be used in some applications. For example, they may be used to carry water or other fluids from a higher elevation to a lower elevation.

Asbestos cement pipes are not typically laid at an angle of 30° or 60°. This is because these angles are not ideal for carrying fluids. At an angle of 30°, the pipe would be more likely to leak. At an angle of 60°, the pipe would be more likely to collapse.

In conclusion, asbestos cement pipes are generally laid horizontally. They are also relatively lightweight and easy to install, which makes them a good choice for horizontal applications. Vertically laid asbestos cement pipes are not as common, but they can be used in some applications. Asbestos cement pipes are not typically laid at an angle of 30° or 60°.