ASM Technologies Project Lead Interview Questions and Answers

Pump head loss calculation parameters include friction loss, elevation change, velocity head, and fittings.

• Friction loss due to pipe roughness

• Elevation change between inlet and outlet

• Velocity head due to fluid velocity

• Losses from fittings like elbows, tees, and valves

AHU components refer to the various parts of an Air Handling Unit that work together to regulate and circulate air in a building.

• Filters - to remove dust and particles from the air

• Coils - for heating or cooling the air

• Fans - to circulate the air

• Dampers - to control the flow of air

• Humidifiers/dehumidifiers - to adjust the humidity levels

Centrifugal blowers are commonly used in AHUs for their efficiency and ability to handle high volumes of air.

• Centrifugal blowers are preferred for AHUs due to their ability to handle high volumes of air efficiently.

• They are more energy efficient compared to other types of blowers.

• Examples of centrifugal blowers commonly used in AHUs include forward curved, backward inclined, and airfoil designs.

Primary pump is the main pump responsible for the majority of the pumping work, while secondary pump is a backup pump used in case the primary pump fails.

• Primary pump is the main pump in a system, while secondary pump is a backup pump.

• Primary pump is responsible for the majority of the pumping work, while secondary pump is used only when needed.

• Examples: In a heating system, the primary pump circulates hot water throug...read more

AHU valve connection refers to the connection of valves in an air handling unit for controlling the flow of air.

• AHU valve connection is essential for regulating the flow of air in an air handling unit.

• Valves are typically connected to the AHU ductwork to control the amount of air entering or exiting the unit.

• Properly connected valves ensure efficient operation of the AHU system.

• Examples of AHU valves include damper val

Chilled water pipe size requirements depend on flow rate, pressure drop, material, insulation, and system design.

• Flow rate: Determine the required flow rate of chilled water in the system.

• Pressure drop: Calculate the pressure drop to ensure efficient operation.

• Material: Select appropriate pipe material based on temperature and pressure requirements.

• Insulation: Insulate the pipes to prevent heat gain or loss.

• System desi...read more

The chiller connection refers to the method by which a chiller unit is connected to a building's HVAC system.

• Chiller connection typically involves piping to transport chilled water from the chiller to the building's air handling units.

• The connection may also include electrical wiring for power supply and control signals.

• Proper chiller connection is crucial for efficient cooling and proper functioning of the HVAC system

Hydrostatic testing is a common method used to test the integrity of DI and HDPE pipes by pressurizing them with water.

• Hydrostatic testing involves filling the pipe with water and pressurizing it to a specified level to check for leaks or weaknesses.

• DI (Ductile Iron) pipes are typically tested at 1.5 times their working pressure, while HDPE (High-Density Polyethylene) pipes are tested at 1.25 times their working pressu...read more

Pump head is calculated by adding the static head, friction head, and velocity head.

• Calculate the static head by measuring the vertical distance between the pump centerline and the highest point of the system.

• Calculate the friction head by considering the pipe length, diameter, roughness, and flow rate.

• Calculate the velocity head by using the formula: V^2 / (2g), where V is the velocity of the fluid and g is the accele...read more

To operate the fire alarm system, follow these steps: activate the alarm, evacuate the building, and wait for emergency responders.

• Activate the fire alarm by pulling the nearest alarm pull station or pressing the alarm button.

• Evacuate the building immediately using the nearest exit and do not use elevators.

• Wait for emergency responders to arrive and provide them with any relevant information about the situation.

The project involves managing the development of a new mobile application for a retail company.

• Coordinating with the development team to ensure timely delivery of the app

• Creating and managing project timelines and milestones

• Collaborating with stakeholders to gather requirements and feedback

• Monitoring and controlling project budget and resources