PS Group Interview Questions and Answers for Experienced

STP stands for Sewage Treatment Plant, which is used to treat wastewater before releasing it back into the environment.

• There are different types of STPs such as activated sludge process, sequencing batch reactor, and membrane bioreactor.

• The type of STP used depends on factors like the volume of wastewater to be treated, space availability, and treatment requirements.

• For example, an activated sludge process is commonly ...read more

The minimum slope for drainage pipe should be 1/4 inch per foot.

• The slope ensures proper flow of water and prevents clogging.

• The slope may vary depending on the type of pipe and the material used.

• The slope should be checked during installation and adjusted if necessary.

• A slope of 1/8 inch per foot may be acceptable for larger pipes.

• The slope should always be towards the main drain or sewer line.