SALARPURIA SATTVA Senior Hvac Technician Interview Questions, Process, and Tips

OPC stands for Ordinary Portland Cement, which is a widely used type of cement in construction work.

• OPC is a type of cement that is commonly used in the construction industry.

• It is known for its high strength and durability.

• OPC is made by grinding clinker, gypsum, and other materials.

• It is used in various applications such as concrete, mortar, and plaster.

• OPC is available in different grades, such as OPC 33, OPC 43, an

One meter is equal to 39.37 inches.

• One meter is equivalent to 100 centimeters.

• One inch is equal to 2.54 centimeters.

• To convert meters to inches, multiply by 39.37 (100 * 2.54).

Steel density is typically around 7.85 g/cm^3.

• Steel density is commonly expressed in grams per cubic centimeter (g/cm^3).

• The density of steel can vary depending on the specific alloy composition.

• For example, the density of stainless steel is around 7.9 g/cm^3, while carbon steel is around 7.85 g/cm^3.

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

A shunt relay in an ACB is used to provide protection against overcurrents by diverting excess current away from the main circuit.

• Shunt relay is connected in parallel with the main circuit of the ACB.

• It detects overcurrents and activates to divert the excess current through a shunt path.

• This helps in protecting the main circuit from damage due to overcurrents.

• Shunt relays are commonly used in Air Circuit Breakers (ACBs...read more

CoC in HVAC stands for Certificate of Conformance, which is a document certifying that a product meets specified requirements.

• CoC in HVAC is a Certificate of Conformance that ensures a product meets specific requirements.

• It is often required in HVAC projects to ensure quality and compliance.

• CoC may include details such as product specifications, testing results, and manufacturer information.

Biological oxygen demand (BOD) and Chemical oxygen demand (COD) are important parameters in wastewater treatment plants.

• Biological oxygen demand (BOD) is a measure of the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material in water.

• Carbonaceous oxygen demand (COD) is a measure of the amount of oxygen required to oxidize all the organic and inorganic matter in water.

• BOD is a ...read more

A voltage monitoring relay is a device that monitors voltage levels and triggers an alarm or protective action if the voltage exceeds or falls below a set threshold.

• Monitors voltage levels in electrical systems

• Triggers alarm or protective action if voltage exceeds or falls below set threshold

• Used to protect equipment from damage due to voltage fluctuations

WTP plant works on the principle of physical and chemical processes to remove impurities from water.

• Water enters the plant and goes through processes like coagulation, flocculation, sedimentation, filtration, and disinfection.

• Coagulation involves adding chemicals to water to make impurities clump together.

• Flocculation helps in forming larger particles called floc for easier removal.

• Sedimentation allows the floc to sett...read more

I provide daily and monthly reports on project progress, issues, and key metrics to track performance.

• Daily reports include updates on tasks completed, challenges faced, and plans for the next day.

• Monthly reports summarize overall progress, budget status, and any potential risks or delays.

• Reports may also include key performance indicators (KPIs) such as project milestones achieved, budget variance, and resource utiliz...read more