HFCL Limited Oet Trainer Interview Questions, Process, and Tips

Welding is a process of joining two or more pieces of metal together by melting and fusing them.

• Welding involves using heat to melt the base metals and adding a filler material to create a strong joint.

• Common types of welding include arc welding, MIG welding, TIG welding, and spot welding.

• Welding is used in various industries such as construction, automotive, aerospace, and manufacturing.

• Examples of welded products inc...read more

Types of welding include MIG, TIG, stick, and flux-cored welding.

• MIG welding uses a wire electrode and shielding gas to create a strong bond.

• TIG welding uses a tungsten electrode and inert gas for precise and clean welds.

• Stick welding uses a consumable electrode coated in flux to create a strong bond.

• Flux-cored welding uses a tubular wire filled with flux for outdoor and windy conditions.

Viscosity is a measure of a fluid's resistance to flow.

• Viscosity is often referred to as thickness or stickiness of a fluid.

• It is caused by friction between molecules in a fluid as they move past each other.

• High viscosity fluids flow slowly, while low viscosity fluids flow quickly.

• Examples of high viscosity fluids include honey and molasses, while water has low viscosity.

Types of fluids include air, water, refrigerants. Coefficient of performance is a measure of efficiency in heat pumps and refrigeration systems.

• Types of fluids: air, water, refrigerants

• Coefficient of performance measures efficiency in heat pumps and refrigeration systems

• Examples: COP of a heat pump is the ratio of heat output to energy input