Qcon Interview Questions, Process, and Tips

Concentric reducer has a common center line while eccentric reducer has offset center lines.

• Concentric reducer has a symmetrical design with a common center line for both ends.

• Eccentric reducer has offset center lines, with one end slightly higher or lower than the other.

• Concentric reducers are used when there is a need to maintain the same pressure and flow rate.

• Eccentric reducers are used when there is a need to prev...read more

Blinding is a technique used in research studies to prevent bias by keeping participants or researchers unaware of certain information.

• Blinding can be single-blind (participants are unaware) or double-blind (both participants and researchers are unaware)

• Blinding helps to reduce bias and ensure the validity of study results

• Example: In a drug trial, participants may be given either the actual drug or a placebo without kn

Permits are legal documents that allow individuals or companies to perform certain activities or projects within a specified timeframe and under specific conditions.

• Permits are required for various activities such as construction, demolition, renovation, and environmental impact assessments.

• They ensure that the work being done complies with local regulations and safety standards.

• Permits may be issued by government agen...read more

Maintenance procedures for heat exchangers involve regular cleaning, inspection, and testing to ensure optimal performance.

• Regularly clean the heat exchanger tubes to remove any buildup of debris or scale

• Inspect the heat exchanger for leaks, corrosion, or other signs of damage

• Test the heat exchanger for efficiency and performance using pressure tests or thermal imaging

• Replace any worn out or damaged parts to prevent fu...read more

Gaskets are mechanical seals used to prevent leakage between two surfaces.

• Types: Spiral Wound, Ring Joint, Camprofile, Double Jacketed, Kammprofile, Rubber, Cork, Metal Jacketed, Non-Asbestos

• Materials: Rubber, Cork, Metal, Non-Asbestos, PTFE, Graphite, Silicone, Neoprene

• Used in various industries like automotive, aerospace, oil & gas, plumbing, etc.

I use different types of permits depending on the nature of work and site requirements.

• Work permits for hot work, confined space entry, excavation, etc.

• Permits for heavy equipment operation, crane operation, etc.

• Permits for working at heights, electrical work, etc.

• Permits for hazardous material handling, welding, etc.

• Permits for road closures, traffic diversions, etc.

Gaskets are used to seal the gap between two surfaces. Types include spiral wound, ring, sheet, and metal.

• Spiral wound gaskets are made of metal and filler material wound together in a spiral pattern.

• Ring gaskets are circular and made of metal or non-metal materials.

• Sheet gaskets are flat and made of materials like rubber, cork, or paper.

• Metal gaskets are made of solid metal and are used in high-pressure applications.

• O...read more

There are various types of pumps used in different industries such as centrifugal, positive displacement, and axial flow pumps.

• Centrifugal pumps use a rotating impeller to create a flow of fluid, commonly used in water treatment plants.

• Positive displacement pumps move fluid by trapping a fixed amount and forcing it through the discharge pipe, commonly used in oil and gas industry.

• Axial flow pumps use propellers to crea...read more

There are four main types of welding: MIG, TIG, Stick, and Flux-Cored.

• MIG (Metal Inert Gas) welding uses a wire electrode and a shielding gas to join two pieces of metal together.

• TIG (Tungsten Inert Gas) welding uses a tungsten electrode and a shielding gas to create a precise and clean weld.

• Stick welding (also known as Shielded Metal Arc Welding or SMAW) uses a consumable electrode coated in flux to create a strong bo...read more

A confined space is an enclosed area with limited access and egress, not designed for continuous occupancy.

• Examples include tanks, vessels, silos, sewers, and tunnels.

• Confined spaces may pose hazards such as lack of oxygen, toxic gases, or physical entrapment.

• Proper training, equipment, and procedures are necessary for safe entry and work in confined spaces.

Safety is the state of being protected from harm or danger. There are various types of permits depending on the nature of work.

• Safety refers to the measures taken to prevent accidents, injuries, and other hazards in the workplace.

• Types of permits include hot work permits, confined space permits, excavation permits, and electrical permits.

• Permits are issued to ensure that work is carried out safely and in compliance wit...read more