10+ Plumbing Engineer Interview Questions and Answers

The soil and waste pipe should be terminated with a cleanout at the 40th floor and extended to the roof for future access.

• Terminate the soil and waste pipe with a cleanout at the 40th floor to allow for maintenance and inspection.

• Extend the pipe vertically to the roof to accommodate the two additional floors above.

• Ensure proper sealing and support for the extended pipe to prevent leaks and structural issues.

Costing for installation of 20 mm dia CPVC pipe inside the toilet area can be calculated by considering the length of the pipe, cost per meter, fittings required, labor charges, and any additional materials needed.

• Calculate the total length of CPVC pipe required for the installation

• Determine the cost per meter of 20 mm dia CPVC pipe

• Consider the cost of fittings such as elbows, connectors, and joints

• Include labor charges for the installation

• Factor in any additional materials n...read more

IS Code for CPVC pipe and fitting is IS 15778:2007.

• IS Code for CPVC pipe and fitting is IS 15778:2007

• CPVC pipes and fittings must conform to this Indian Standard for quality and safety

• IS 15778:2007 covers specifications for CPVC pipes, fittings, and solvent cement

Plumbers should follow safety measures such as wearing protective gear, securing work areas, and using proper tools.

• Always wear appropriate protective gear such as gloves, goggles, and hard hats.

• Secure work areas by blocking off access to prevent accidents.

• Use proper tools and equipment to avoid injuries and ensure work is done correctly.

• Follow safety protocols for handling hazardous materials and chemicals.

• Regularly inspect and maintain tools and equipment to prevent malfunc...read more

The slope for an underground drainage system should typically be 1/4 inch per foot or 2% slope.

• The slope of the drainage system should be at least 1/4 inch per foot to ensure proper flow of water and prevent clogging.

• A slope of 2% is also commonly used for underground drainage systems.

• Proper slope helps in efficient drainage and prevents standing water or blockages.

• Consult local building codes and regulations for specific slope requirements in your area.

High Density Polyethylene

• HDPE stands for High Density Polyethylene

• It is a type of plastic commonly used in plumbing for pipes and fittings

• HDPE is known for its strength, durability, and resistance to chemicals

• Examples of HDPE plumbing products include pipes, couplings, and valves

I have worked with various types of pipes including PVC, copper, PEX, and galvanized steel.

• PVC pipes are commonly used for drainage and water supply systems due to their affordability and durability.

• Copper pipes are often used for water supply lines because of their resistance to corrosion.

• PEX pipes are flexible and easy to install, making them popular for residential plumbing.

• Galvanized steel pipes are strong and durable, but can corrode over time.

LWC stands for Lightweight Concrete, which is a type of concrete that uses lightweight aggregates to reduce its density.

• LWC is commonly used in construction for its reduced weight and improved thermal properties.

• Lightweight aggregates used in LWC include expanded clay, shale, or slate.

• LWC can be used for applications such as roof decks, floor fills, and insulation.

• The reduced weight of LWC makes it easier to handle and transport compared to traditional concrete.

A PRV station SLD is a schematic diagram showing the layout of a pressure reducing valve station.

• Include the main components such as pressure reducing valve, isolation valves, pressure gauges, and strainer.

• Show the flow direction and connection points of the components.

• Label each component clearly for easy identification.

• Ensure proper sizing and spacing of components for clarity and functionality.

GI pipe sizes are measured in millimeters.

• GI pipe sizes typically range from 15mm to 300mm in diameter

• Common sizes include 15mm, 20mm, 25mm, 32mm, 40mm, 50mm, 65mm, 80mm, 100mm, 125mm, 150mm, 200mm, 250mm, and 300mm

• The size of a GI pipe is determined by its inner diameter