Site Engineer Mechanical Interview Questions and Answers for Freshers

Copper is more efficient and durable than aluminium in terms of conductivity.

• Copper has a higher electrical conductivity than aluminium.

• Copper is more resistant to corrosion and oxidation compared to aluminium.

• Copper has better thermal conductivity than aluminium.

• Copper is commonly used in electrical wiring, power transmission, and heat exchangers.

• Aluminium is lighter and more cost-effective than copper, making it suitable for certain applications.

Thermal conductivity refers to the ability of a material to conduct heat.

• Thermal conductivity is a property that determines how well a material can transfer heat.

• It is measured in units of watts per meter-kelvin (W/mK).

• Materials with high thermal conductivity can transfer heat quickly, while those with low thermal conductivity transfer heat slowly.

• Metals like copper and aluminum have high thermal conductivity, making them good conductors of heat.

• Insulating materials like wood...read more

The area and volume of geometric shapes vary based on their dimensions and formulas.

• The area of a square is calculated by multiplying the length of one side by itself.

• The area of a rectangle is calculated by multiplying the length and width.

• The volume of a rectangular prism is calculated by multiplying the length, width, and height.

• The area of a circle is calculated by multiplying pi (approximately 3.14159) by the square of the radius.

• The volume of a cylinder is calculated by...read more

Insulation refers to the process of reducing heat transfer or sound transmission between objects or spaces.

• Insulation is used to maintain desired temperatures in buildings, equipment, or systems.

• It can be achieved through the use of materials with low thermal conductivity, such as fiberglass, foam, or mineral wool.

• Insulation can also be applied to pipes, ducts, or tanks to prevent heat loss or gain.

• It helps in reducing energy consumption and improving energy efficiency.

• Exampl...read more