Presston Engineering Corporation Store Manager Interview Questions and Answers

There are several types of aggregate that may be required on site for construction purposes.

• Common types of aggregate include gravel, sand, crushed stone, and recycled concrete.

• The specific types of aggregate needed depend on the project requirements and the intended use.

• For example, fine aggregate like sand is often used for mortar and concrete mixtures, while larger aggregates like gravel are used for road constructi...read more

There are various types of oils used in machinery for lubrication and cooling purposes.

• Mineral oils: commonly used in machinery

• Synthetic oils: offer better performance and stability

• Biodegradable oils: environmentally friendly option

• Hydraulic oils: used in hydraulic systems

• Gear oils: for gearboxes and transmissions

• Compressor oils: for air compressors

• Turbine oils: for turbines

• Heat transfer oils: used in heat transfer sys

There are several types of steel used in box culverts, drainage, and roads.

• Common types of steel used in box culverts include mild steel, high-strength low-alloy steel, and weathering steel.

• For drainage systems, stainless steel is often used due to its corrosion resistance.

• In road construction, reinforcement steel bars (rebars) are commonly used to strengthen concrete pavements.

• Other types of steel used in road infrast...read more