Veolia Interview Questions and Answers

The approach temperature range for a water-cooled chiller should typically be between 3 to 5 degrees Fahrenheit.

• The approach temperature is the temperature difference between the refrigerant leaving the evaporator and the water entering the condenser.

• A range of 3 to 5 degrees Fahrenheit ensures optimal efficiency and performance of the chiller.

• Maintaining a proper approach temperature helps prevent issues such as compressor overload and reduced cooling capacity.

• Regular monito...read more

Water cooled chiller works on the principle of removing heat from a liquid via a refrigeration cycle.

• Water is circulated through the chiller's evaporator where it absorbs heat from the process water.

• The warm water is then pumped to the cooling tower where heat is rejected to the atmosphere.

• Cooled water is circulated back to the chiller to absorb more heat.

• Refrigerant in the chiller's evaporator evaporates at low pressure and absorbs heat from the water.

• The refrigerant is then...read more

Spare parts for AHU and pumps should include common wear and tear items like filters, belts, bearings, and seals.

• Filters for AHU to ensure proper air quality

• Belts for pumps to maintain proper operation

• Bearings for both AHU and pumps to reduce friction and wear

• Seals for pumps to prevent leaks and maintain efficiency

PPM of mechanical equipment involves scheduled inspections, maintenance, and repairs to prevent breakdowns.

• Create a detailed schedule for inspections, maintenance, and repairs

• Regularly check and lubricate moving parts

• Replace worn out parts before they fail

• Keep detailed records of maintenance activities

• Train staff on proper maintenance procedures

A surge in the chiller is a sudden increase in pressure or flow rate within the chiller system.

• A surge can occur when there is a sudden demand for cooling that exceeds the chiller's capacity.

• It can also happen if there is a blockage or restriction in the chiller system.

• Surges can lead to inefficiency, increased wear and tear on components, and potential damage to the chiller.

• To prevent surges, proper maintenance and monitoring of the chiller system is essential.