Nasser S. Al Hajri Corporation Hvac Ducting Supervisor Interview Questions and Answers

HVAC stands for Heating, Ventilation, and Air Conditioning. It refers to the technology used for indoor environmental comfort.

• HVAC systems are used to regulate temperature, humidity, and air quality in buildings.

• They can include components such as furnaces, air conditioners, ductwork, and ventilation fans.

• Properly designed and maintained HVAC systems can improve energy efficiency and indoor air quality.

• HVAC technicians...read more

FCU stands for Fan Coil Unit, which is a device that contains a fan and a heat exchanger to regulate air temperature.

• FCU is commonly used in HVAC systems to provide heating or cooling to a space.

• It works by drawing in air from the room, passing it over a heat exchanger, and then blowing it back out into the room.

• FCUs can be wall-mounted, ceiling-mounted, or floor-mounted depending on the space and design requirements.

• E...read more

FD stands for Fire Damper, which is a device installed in HVAC ducts to prevent the spread of fire and smoke.

• FD is a crucial component of fire protection systems in buildings.

• It is designed to automatically close when it detects heat or smoke, preventing the spread of fire and smoke through the ducts.

• FDs are required by building codes to be installed in certain locations, such as walls, floors, and ceilings, to compart...read more

Access door is an inspection way of inside the installed duct.

• Access doors are used to provide easy access to the inside of the duct for inspection, cleaning, and maintenance purposes.

• They are typically installed at regular intervals along the length of the duct.

• Access doors can be made of various materials such as metal, plastic, or fiberglass.

• They come in different sizes and shapes depending on the size and shape of ...read more

There are various types of grills used in HVAC ducting such as return, supply, fresh air, exhaust, and transfer grills.

• Return grills are used to extract air from a room and return it to the HVAC system.

• Supply grills are used to supply conditioned air to a room.

• Fresh air grills are used to bring in fresh air from outside.

• Exhaust grills are used to remove stale air from a room.

• Transfer grills are used to transfer air fro...read more

VCD stands for Volume Control Damper, which is used to regulate the airflow in HVAC systems.

• VCD is a type of damper that is installed in HVAC ducts to control the volume of air flowing through them.

• It is typically made of galvanized steel and has blades that can be adjusted to regulate the airflow.

• VCDs are commonly used in commercial and industrial HVAC systems to maintain proper air balance and temperature control.

• The...read more

There are four types of ducts: supply duct, return duct, fresh air duct, and exhaust duct.

• Supply ducts carry conditioned air from the HVAC system to the rooms.

• Return ducts carry air from the rooms back to the HVAC system.

• Fresh air ducts bring in outside air to improve indoor air quality.

• Exhaust ducts remove stale air and pollutants from the building.

The supply duct is responsible for delivering cool air from the unit to the room.

• Supply ducts are typically made of metal or flexible material and are installed in the walls, floors, or ceilings of a building.

• They are connected to the air conditioning unit and distribute cool air throughout the building.

• Properly sized and installed supply ducts ensure that each room receives the appropriate amount of cool air.

• Regular m...read more

Return duct is a part of HVAC system that carries air from a room back to the air handler to be conditioned and recirculated.

• Return ducts are typically larger in size than supply ducts to accommodate the volume of air being returned.

• They can be located in walls, ceilings, or floors depending on the design of the building.

• Return ducts can also have filters installed to remove dust and other particles from the air before...read more