Allianz Global Corporate & Specialty Interview Questions and Answers

Zinc is widely used for surface coating on iron sheets for galvanizing.

• Zinc is commonly used as a protective coating for iron sheets to prevent corrosion.

• The process of coating iron sheets with zinc is known as galvanizing.

• Zinc provides a sacrificial layer that corrodes instead of the iron, extending the lifespan of the metal.

• Galvanized iron sheets are commonly used in construction, automotive, and manufacturing industries.

• Other anti-corrosion metals used for surface coating ...read more

The air pressure required for sand blasting depends on various factors such as the type of surface being blasted, the type of abrasive material used, and the desired level of surface preparation.

• The air pressure for sand blasting typically ranges from 40 to 120 pounds per square inch (psi).

• For delicate surfaces or light cleaning, lower air pressure around 40-60 psi may be sufficient.

• For heavy-duty cleaning or removal of tough coatings, higher air pressure around 80-120 psi ma...read more

The Swedish standard for blast finish includes several grades.

• The Swedish standard for blast finish categorizes the finish into different grades based on the level of surface roughness.

• The grades range from Sa 1 to Sa 3, with Sa 1 being the least rough and Sa 3 being the roughest.

• Sa 1 is a light blast cleaning, suitable for surfaces that will be painted or coated.

• Sa 2 is a thorough blast cleaning, suitable for surfaces that will be exposed to moderate humidity and weathering....read more

Sand blasting is required to remove old paint, rust, and other contaminants from surfaces before painting.

• Sand blasting helps create a clean and smooth surface for paint adhesion.

• It removes old paint, rust, scale, and other surface contaminants.

• Sand blasting also helps in profiling the surface, providing better paint adhesion.

• It is an effective method for preparing surfaces made of metal, concrete, or wood.

• Sand blasting can be used to prepare surfaces for painting, powder coa...read more

There are several types of sandblasting nozzles used for different purposes.

• There are generally four types of sandblasting nozzles: straight bore, venturi, angle, and wide throat.

• Straight bore nozzles are the most common and provide a concentrated stream of abrasive material.

• Venturi nozzles have a wider entry and narrow exit, creating a vacuum effect to increase abrasive velocity.

• Angle nozzles are used for hard-to-reach areas and provide a more focused stream.

• Wide throat nozz...read more