Sterling & Wilson Quality Engineer Interview Questions and Answers

Slump test is a method to measure the workability of concrete by observing the consistency and flow of the concrete mix.

• Prepare a slump cone by lubricating the inside surface and placing it on a smooth, flat surface.

• Fill the cone with concrete in three layers, each layer tamped with a rod 25 times.

• Remove excess concrete, level the top, and lift the cone vertically. Measure the slump of the concrete.

• Record the slump mea...read more

To fill a cube, ensure all sides are properly aligned and filled with the material. Check for any gaps or air pockets.

• Ensure the cube mold is clean and dry before filling.

• Pour the material into the mold slowly and evenly to prevent air pockets.

• Use a vibrating table to help settle the material and remove any air bubbles.

• Check for any leaks or cracks in the mold before filling to prevent material from leaking out.

• After f...read more

Bentonite is used as a drilling fluid to stabilize boreholes before pulsing.

• Bentonite is mixed with water to form a slurry and pumped into the borehole.

• The slurry fills the borehole and stabilizes the walls, preventing collapse.

• After the bentonite has set, pulsing can be done without the risk of borehole collapse.

• Pulsing is a technique used in geophysical exploration to measure the properties of the subsurface.

HDPE and Di pipe IS codes are standards set by the Bureau of Indian Standards for high-density polyethylene and ductile iron pipes.

• IS 4984: High-density polyethylene (HDPE) pipes for potable water supplies

• IS 8329: Ductile iron (DI) pipes and fittings for pressure pipelines

Aerators are devices used to add air into water or other liquids to increase oxygen levels.

• Surface aerators

• Submersible aerators

• Diffused aerators

• Mechanical aerators

• Aspirating aerators