Interview Questions and Answers

Air conditioning is the process of removing heat and moisture from the interior of a building to improve comfort, while refrigeration is the process of cooling a space to preserve perishable items.

• Air conditioning is used to maintain a comfortable temperature in indoor spaces, while refrigeration is used to preserve food, medicine, and other perishable items.

• Air conditioning systems typically use a refrigeration cycle to cool the air, while refrigeration systems focus on main...read more

Heat exchangers are devices used to transfer heat between two or more fluids, without mixing them together.

• Types include shell and tube, plate, finned tube, and double pipe heat exchangers

• Shell and tube heat exchangers are commonly used in industrial applications

• Plate heat exchangers are compact and efficient, often used in HVAC systems

• Finned tube heat exchangers have extended surface area for better heat transfer

• Double pipe heat exchangers are simple and easy to clean

The type of bearing required for a machine drive is selected based on factors such as load, speed, lubrication, and operating conditions.

• Consider the load and speed requirements of the machine drive

• Choose between ball bearings, roller bearings, or plain bearings based on the application

• Take into account the lubrication method and maintenance requirements

• Consider the operating conditions such as temperature, vibration, and alignment

A guarantee is a promise made by the manufacturer or seller to repair or replace a product if it fails to meet certain conditions, while a warranty is a contract that provides assurance that a product will perform as specified for a certain period of time.

• Guarantee is a promise to repair or replace a product if it fails to meet certain conditions.

• Warranty is a contract that assures a product will perform as specified for a certain period of time.

• Guarantee is usually provided ...read more

Iron carbon diagram is a graphical representation of the phases of iron and carbon at different temperatures.

• Shows the phases of iron and carbon at different temperatures

• Helps in understanding the microstructure of steel

• Critical for heat treatment processes in metallurgy

Quality of mesh in FEM is checked by examining element shapes, aspect ratios, and convergence of results.

• Check element shapes to ensure they are not distorted or skewed

• Evaluate aspect ratios to ensure they are within acceptable limits

• Verify convergence of results by refining the mesh and comparing results