Blue Star Site Engineer Interview Questions, Process, and Tips

Transformers rating is in kVA because it takes into account both voltage and current.

• kVA is a unit of apparent power, which is the combination of real power (measured in kW) and reactive power (measured in kVAR).

• Transformers are designed to handle a certain amount of power, and kVA rating takes into account both the voltage and current that the transformer can handle.

• For example, a transformer with a rating of 100 kVA ...read more

Ground is a conducting body that is used as a reference point for electrical circuits, while earth is a large conducting body that acts as a sink for electrical charges.

• Ground is a reference point for electrical circuits, while earth is a sink for electrical charges.

• Ground is a local concept, while earth is a global concept.

• Ground is a man-made concept, while earth is a natural concept.

• Ground is used to prevent electri...read more

Treated fresh unit equipment parts are components used in the treatment of fresh water in a unit.

• Pumps

• Filters

• Valves

• Chemical dosing systems

• Control panels

• Flow meters

TFA stands for Thin Film Antenna. It is a type of antenna that uses a thin film of conductive material to transmit and receive signals.

• TFA works on the principle of using a thin film of conductive material as the antenna element.

• The conductive film is usually made of materials like copper or gold.

• The film is deposited on a substrate, which provides mechanical support and insulation.

• TFA antennas are lightweight, flexibl...read more

Duct size can be calculated based on the required airflow, velocity, and friction loss.

• Determine the required airflow for the space or system.

• Calculate the velocity of the air based on the desired airflow and the cross-sectional area of the duct.

• Consider the friction loss in the duct system due to fittings, bends, and length.

• Use duct sizing charts or software to find the appropriate duct size based on the calculated ve...read more

AHU and chiller are essential components of HVAC systems.

• AHU stands for Air Handling Unit and is responsible for circulating and conditioning air within a building.

• Chiller is a machine that removes heat from a liquid via a vapor-compression or absorption refrigeration cycle.

• AHU and chiller work together to provide cooled air to the building.

• AHU takes in outside air, filters it, cools or heats it, and then distributes i...read more

Ventilation CFM is calculated by determining the volume of air to be exchanged per minute.

• CFM stands for Cubic Feet per Minute.

• To calculate ventilation CFM, you need to know the volume of the space and the desired air exchange rate.

• The formula to calculate CFM is: CFM = (Volume of Space) x (Air Exchange Rate)

• For example, if the volume of a room is 1000 cubic feet and the desired air exchange rate is 5 times per hour, t

The current CTC and expected CTC are financial aspects of the job that need to be discussed during the negotiation process.

• Current CTC refers to the current salary or compensation package of the candidate.

• Expected CTC refers to the salary or compensation package the candidate is looking for in the new role.

• These figures are important for both the employer and the candidate to ensure alignment and avoid any misunderstan...read more

Exhaust CFM can be calculated by determining the air volume flow rate in cubic feet per minute.

• Determine the area of the exhaust opening

• Measure the velocity of the air being exhausted

• Multiply the area by the velocity to get the air volume flow rate in cubic feet per minute

Duct size is determined by the gauge of the material used.

• Duct size refers to the dimensions of the ductwork used in HVAC systems.

• The gauge of the material refers to its thickness or weight.

• Thicker gauge materials are used for larger duct sizes to ensure structural integrity.

• Common gauges for ductwork range from 26 to 16, with lower numbers indicating thicker materials.

• For example, a 16-gauge duct would be used for lar...read more

Transformers rating is in kVA because it takes into account both voltage and current.

• kVA is a unit of apparent power, which is the combination of real power (measured in kW) and reactive power (measured in kVAR).

• Transformers are designed to handle a certain amount of power, and kVA rating takes into account both the voltage and current that the transformer can handle.

• For example, a transformer with a rating of 100 kVA ...read more

Ground is a conducting body that is used as a reference point for electrical circuits, while earth is a large conducting body that acts as a sink for electrical charges.

• Ground is a reference point for electrical circuits, while earth is a sink for electrical charges.

• Ground is a local concept, while earth is a global concept.

• Ground is a man-made concept, while earth is a natural concept.

• Ground is used to prevent electri...read more