10+ Daivik Developers Interview Questions and Answers

Soundrater in an air conditioner is a device used to measure the sound level produced by the unit.

• Soundrater is typically installed in air conditioners to ensure that the noise level produced by the unit is within acceptable limits.

• It helps in determining if the air conditioner is operating quietly and efficiently.

• Soundrater readings are important for maintaining a comfortable indoor environment and complying with noise regulations.

• If the sound level exceeds the recommended l...read more

VCD stands for Volume Control Damper and is installed in HVAC ducting systems to regulate airflow and control the volume of air passing through.

• VCD is used to control the flow of air in HVAC systems by adjusting the damper blade position.

• It helps in balancing the airflow in different areas of a building to ensure proper ventilation and comfort.

• VCDs can be manually operated or motorized, depending on the specific requirements of the HVAC system.

The duct line of supply air, fresh air, return air, and exhaust air can be identified in the drawing based on specific symbols and labels.

• Supply air ducts typically have a fan symbol and are labeled as 'SA' or 'Supply Air'.

• Fresh air ducts may have an intake symbol and are labeled as 'FA' or 'Fresh Air'.

• Return air ducts often have a grille symbol and are labeled as 'RA' or 'Return Air'.

• Exhaust air ducts can be identified by an exhaust fan symbol and are labeled as 'EA' or 'Exh...read more

Various tools are used in HVAC ductwork, including snips, seamers, hammers, drills, screwdrivers, tape measures, and levels.

• Snips - used for cutting sheet metal

• Seamers - used for bending and folding metal edges

• Hammers - used for securing ductwork

• Drills - used for making holes for fasteners

• Screwdrivers - used for tightening screws

• Tape measures - used for measuring duct lengths

• Levels - used for ensuring ductwork is installed straight and level

Tools needed for marking diffuser and grill include tape measure, pencil, level, and masking tape.

• Tape measure is essential for measuring the correct dimensions for marking.

• Pencil is used for marking the locations on the ducting.

• Level ensures that the markings are straight and aligned properly.

• Masking tape can be used to temporarily secure the diffuser or grill in place while marking.

Different types of pipes and fittings are used in plumbing work.

• Copper pipes and fittings are commonly used for water supply lines.

• PVC pipes and fittings are used for drainage and waste systems.

• PEX pipes and fittings are popular for both water supply and heating systems.

• Galvanized steel pipes and fittings are used for water supply lines in older buildings.

• Brass pipes and fittings are often used for valves and faucets.

• Cast iron pipes and fittings are used for sewer lines.

• CPVC ...read more

Fire dampers are installed in HVAC ducting to prevent the spread of fire and smoke throughout a building.

• Fire dampers are installed in HVAC ducting to prevent the spread of fire and smoke in case of a fire emergency.

• They are typically installed in ductwork that penetrates fire-rated walls, floors, or ceilings.

• Fire dampers are designed to close automatically when they detect high temperatures, preventing the spread of fire and smoke to other areas of the building.

• They are a cr...read more

The ideal pH of water should be around 7, which is considered neutral.

• The pH scale ranges from 0 to 14, with 7 being neutral.

• Water with a pH below 7 is considered acidic, while water with a pH above 7 is considered alkaline.

• Different uses of water may require different pH levels. For example, drinking water should ideally have a pH between 6.5 and 8.5.

• pH levels in water can be influenced by various factors such as minerals, pollutants, and environmental conditions.

A booster pump is a device used to increase the pressure and flow rate of a fluid.

• It is commonly used in plumbing systems to enhance water pressure in buildings.

• Booster pumps are often installed in areas with low water pressure, such as high-rise buildings or remote locations.

• They can be electrically powered or driven by an engine.

• Booster pumps can be used for various applications, including irrigation systems, firefighting, and water supply.

• They work by taking in water at a ...read more

A transfer pump is a device used to move fluids from one location to another.

• Transfer pumps are commonly used in plumbing to move water or other liquids.

• They can be powered by electricity, gasoline, or manual operation.

• Transfer pumps are often used in situations where there is a need to drain or transfer large volumes of liquid, such as emptying a pool or transferring fuel.

• Examples of transfer pumps include submersible pumps, centrifugal pumps, and diaphragm pumps.

The slope of a SP line refers to the steepness or incline of the line.

• The slope is a measure of how much the line rises or falls as it moves horizontally.

• It can be positive, negative, or zero depending on the direction of the line.

• A positive slope indicates an upward incline, while a negative slope indicates a downward incline.

• A slope of zero means the line is horizontal.

• The slope can be calculated by finding the change in y-coordinates divided by the change in x-coordinates ...read more

Gland type depends on cable type and size. ELCB is a safety device that cuts off power in case of electrical leakage. MCB and RCB are circuit breakers with different functions.

• Gland type selection depends on the cable type and size to ensure proper sealing and protection.

• ELCB stands for Earth Leakage Circuit Breaker and is a safety device that cuts off power in case of electrical leakage to prevent electric shock.

• MCB stands for Miniature Circuit Breaker and is a type of circu...read more

Chlorine is a chemical element with the symbol Cl and atomic number 17. It is a yellow-green gas at room temperature.

• Chlorine is a highly reactive element.

• It is commonly used as a disinfectant and bleaching agent.

• Chlorine is an essential component in the production of PVC.

• It can be found in table salt (sodium chloride).

The gland size for 185mm cable depends on the type of gland used.

• The gland size can vary depending on the type of cable gland used.

• The size of the cable itself is not the only factor in determining the gland size.

• It is important to consult the manufacturer's specifications for the specific cable gland being used.

• For example, a manufacturer may recommend a gland size of M63 for a 185mm cable.