Excel Industries Utility Engineer Interview Questions and Answers

The cooling capacity of a screw chiller can be calculated using the formula: Cooling Capacity = Mass Flow Rate * Specific Heat Capacity * Temperature Difference

• Determine the mass flow rate of the chilled water circulating through the chiller

• Determine the specific heat capacity of the chilled water

• Calculate the temperature difference between the chilled water entering and leaving the chiller

• Multiply the mass flow rate, ...read more

Components of a nitrogen plant include air compressor, air dryer, air filter, nitrogen generator, and nitrogen storage tank.

• Air compressor: compresses air from the atmosphere

• Air dryer: removes moisture from the compressed air

• Air filter: removes impurities from the compressed air

• Nitrogen generator: separates nitrogen from the compressed air

• Nitrogen storage tank: stores the produced nitrogen

The expansion valve is a device used in refrigeration and air conditioning systems to control the flow of refrigerant.

• It is located between the condenser and the evaporator in the system.

• The expansion valve regulates the flow of high-pressure, high-temperature refrigerant from the condenser to the low-pressure, low-temperature refrigerant in the evaporator.

• It maintains the proper pressure and temperature levels in the ...read more