JLL BMS Operator and Technician Interview Questions and Answers

HVAC stands for Heating, Ventilation, and Air Conditioning. UPS stands for Uninterruptible Power Supply. AHU stands for Air Handling Unit.

• HVAC refers to the technology used for indoor environmental comfort, including heating, cooling, and air quality control.

• UPS is a device that provides emergency power to a load when the input power source fails.

• AHU is a device used to regulate and circulate air as part of a heating,

An air cold chiller is a device that cools air by removing heat from it.

• An air cold chiller is commonly used in air conditioning systems to cool indoor spaces.

• It works by circulating a refrigerant that absorbs heat from the air and then releases it outside.

• The chilled air is then distributed through ducts or vents to cool the desired area.

• Air cold chillers can be used in various settings such as homes, offices, hospita...read more

An AHU (Air Handling Unit) is a device used to regulate and circulate air as part of a heating, ventilation, and air conditioning (HVAC) system.

• AHU is an abbreviation for Air Handling Unit.

• It is a device used in HVAC systems to control and distribute air.

• AHUs typically consist of a fan, heating and cooling coils, filters, and dampers.

• They are responsible for conditioning and circulating air within a building.

• AHUs can b...read more

LP stands for Low Pass and HP stands for High Pass.

• LP (Low Pass) is a type of filter that allows low-frequency signals to pass through while attenuating high-frequency signals.

• HP (High Pass) is a type of filter that allows high-frequency signals to pass through while attenuating low-frequency signals.

• LP and HP filters are commonly used in audio systems to control the frequency range of the output signal.

• LP filters are ...read more

A UPS (Uninterruptible Power Supply) is a device that provides emergency power to a load when the input power source fails.

• UPS is used to protect critical equipment from power outages, voltage fluctuations, and other power-related issues.

• It typically consists of a battery, an inverter, and a rectifier.

• UPS can be used for various applications such as computers, data centers, hospitals, telecommunications, etc.

• Examples o...read more

PAC stands for Programmable Automation Controller. It is a device used in industrial automation to control and monitor processes.

• PAC is a type of controller used in industrial automation systems.

• It is programmable and can be customized to control and monitor various processes.

• PACs are often used in manufacturing plants, power plants, and other industrial settings.

• They can communicate with other devices and systems to g...read more

A water cold chiller is a device that cools water by removing heat from it, typically used in air conditioning systems or industrial processes.

• A water cold chiller uses a refrigeration cycle to cool water.

• It consists of components such as a compressor, condenser, expansion valve, and evaporator.

• The chiller circulates chilled water through a system to remove heat from the surroundings.

• It is commonly used in air conditio...read more

ACB stands for Air Circuit Breaker and VCB stands for Vacuum Circuit Breaker.

• ACB is a type of circuit breaker that uses air as the medium to extinguish the arc.

• VCB is a type of circuit breaker that uses vacuum as the medium to extinguish the arc.

• Both ACB and VCB are used for electrical circuit protection and can interrupt the flow of current in case of faults.

• ACBs are commonly used in low voltage applications, while VC...read more

Precision air conditioning units are commonly used in server rooms.

• Precision air conditioning units are designed to provide precise temperature and humidity control.

• These units are capable of maintaining stable and optimal conditions for sensitive equipment like servers.

• They often feature redundant systems for reliability and may include features like hot aisle/cold aisle containment.

• Examples of precision air condition...read more

A CSU, or Channel Service Unit, is a device used in telecommunications to connect a digital line to a customer's equipment.

• CSU stands for Channel Service Unit.

• It is used in telecommunications to connect a digital line to a customer's equipment.

• CSUs provide signal regeneration, line coding, and diagnostic capabilities.

• They ensure reliable transmission of data over long distances.

• Examples of CSUs include T1 CSUs, ISDN CS