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10+ AkzoNobel Interview Questions and Answers

Updated 29 Oct 2024
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Q1. What are the Pump head loss calculation parameters

Ans.

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

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Q2. What is the difference between primary pump or secondary pump

Ans.

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 through the system, while the secondary pump kicks in if the pri...read more

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Q3. What things are required in chilled water pipe size

Ans.

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 design: Consider the layout and configuration of the system fo...read more

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Q4. What is refrigeration cycle? Commissioning stages of Data center?

Ans.

The refrigeration cycle is a process that removes heat from a space and transfers it to the external environment.

  • The refrigeration cycle consists of four main components: compressor, condenser, expansion valve, and evaporator.

  • The compressor compresses the refrigerant gas, raising its temperature and pressure.

  • The high-pressure refrigerant then flows to the condenser, where it releases heat to the surroundings and condenses into a liquid.

  • The liquid refrigerant passes through th...read more

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Q5. Which type of blowers are use in AHU

Ans.

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.

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Q6. What is the AHU valve conection

Ans.

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 valves, butterfly valves, and ball valves.

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Q7. Types of pumps? Types of compressor

Ans.

Types of pumps include centrifugal pumps, reciprocating pumps, and rotary pumps.

  • Centrifugal pumps use centrifugal force to move fluid through a system.

  • Reciprocating pumps use a piston or diaphragm to create pressure and move fluid.

  • Rotary pumps use rotating mechanisms to transfer fluid.

  • Other types of pumps include gear pumps, peristaltic pumps, and vane pumps.

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Q8. What is chilled water system? Types of ac system?

Ans.

A chilled water system is a cooling system that uses chilled water to remove heat from a building or process.

  • Chilled water systems use water as a cooling medium.

  • They typically consist of a chiller, chilled water pumps, and a distribution system.

  • Chilled water is circulated through coils or heat exchangers to cool air or equipment.

  • Chilled water systems are commonly used in large commercial buildings, data centers, and industrial processes.

  • Examples of chilled water systems inclu...read more

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Q9. what is the AHU components

Ans.

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

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Q10. What is the chiller conection

Ans.

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.

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