Tube Investments of India Senior Engineer Interview Questions and Answers

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

Productivity of machinery and manpower is crucial for efficient operations.

• Efficient machinery and skilled manpower can increase productivity.

• Regular maintenance of machinery can prevent downtime and increase productivity.

• Proper training and motivation of manpower can also improve productivity.

• Use of automation and technology can further enhance productivity.

• Productivity can be measured using metrics such as output per

Standard thumb rule in estimation

• Thumb rule is a rough estimate based on experience

• It is not accurate and can vary based on project

• Example: 1 hour per page for content writing

• Example: 1 month per developer for a software project

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.

Billing codes are determined by the organization and industry standards.

• Billing codes are used to identify specific products or services provided by an organization.

• The codes are typically determined by the organization and may also follow industry standards.

• Examples of billing codes include CPT codes for medical procedures and UPC codes for retail products.

Density of bentonite and prestressing formula are two separate topics in civil engineering.

• Density of bentonite is typically around 2.0-2.5 g/cm^3.

• Prestressing formula involves calculating the stress in a structure due to applied loads and prestressing forces.

• Example of prestressing formula: Stress = Load / Area + Prestressing Force / Area