CR3 Group Rotary Engineer Interview Questions, Process, and Tips

Bearings can be classified based on the type of load they can handle, the type of motion they allow, and the design of the bearing.

• Based on load: radial bearings, thrust bearings, combined bearings

• Based on motion: linear bearings, rotary bearings

• Based on design: ball bearings, roller bearings, plain bearings

Mechanical seals are used to prevent leakage in rotary equipment by creating a barrier between moving and stationary parts.

• Mechanical seals can be classified into various types such as pusher seals, non-pusher seals, balanced seals, unbalanced seals, cartridge seals, and split seals.

• They work by maintaining a thin film of liquid or gas between the sealing faces to prevent leakage.

• The seal faces are typically made of ma...read more

Types of pumps include centrifugal, reciprocating, and rotary pumps. They work by creating a flow of liquid through mechanical action. Characteristics include flow rate, pressure, efficiency, and power consumption.

• Centrifugal pumps use a rotating impeller to create a flow of liquid by centrifugal force.

• Reciprocating pumps use a piston or diaphragm to create a flow of liquid by reciprocating motion.

• Rotary pumps use rota...read more

Bearings can be identified by their size, shape, material, and markings.

• Check the size and shape of the bearing to determine its type (e.g. ball bearing, roller bearing)

• Look for any markings or labels on the bearing that indicate the manufacturer or part number

• Identify the material of the bearing (e.g. steel, ceramic) by visual inspection or using a magnet

• Measure the inner and outer diameter, width, and type of bearing