Bechtel Senior Engineer Mechanical Interview Questions and Answers

Gpm for water supply pump can be calculated by dividing the flow rate in gallons by the time in minutes.

• Calculate the flow rate in gallons per minute (GPM)

• Determine the time in minutes over which the flow rate is measured

• Divide the flow rate by the time to get the GPM value

Heat exchangers are devices used to transfer heat between two or more fluids, ensuring efficient heat transfer and temperature control.

• Transfer heat between fluids

• Maintain temperature control

• Increase energy efficiency

• Commonly used in HVAC systems, refrigeration units, and chemical processing plants

Welding rod specifications include material composition, diameter, and AWS classification.

• Welding rod specifications typically include material composition, such as carbon steel or stainless steel.

• Diameter of the welding rod is an important specification to ensure proper weld penetration.

• AWS classification indicates the type of welding process and the strength of the weld.

• Examples of welding rod specifications: E6010,

Various types of welding processes include MIG, TIG, stick, flux-cored, and spot welding.

• MIG (Metal Inert Gas) welding uses a wire electrode and shielding gas to join metals.

• TIG (Tungsten Inert Gas) welding uses a non-consumable tungsten electrode and inert gas for welding.

• Stick welding, also known as Shielded Metal Arc Welding (SMAW), uses a flux-coated electrode.

• Flux-cored welding uses a tubular wire filled with flux...read more

Hydraulic circuit is a system of interconnected pipes, valves, and actuators that transmit power using pressurized fluid.

• Hydraulic circuits are commonly used in heavy machinery, such as excavators and cranes.

• The circuit consists of a pump, valves, cylinders, and hoses.

• The pump pressurizes the fluid, which is then directed to the valves.

• The valves control the flow of fluid to the cylinders, which then convert the fluid ...read more