Al Naba Services LLC Hvac Technician Interview Questions and Answers

Chillers operate by removing heat from a liquid through a refrigeration cycle.

• Chillers use a compressor to compress refrigerant gas, which then condenses into a liquid.

• The liquid refrigerant is then pumped through an evaporator, where it absorbs heat from the chilled water.

• The refrigerant then returns to the compressor to repeat the cycle.

• Chillers can be air-cooled or water-cooled, depending on the application.

• Chillers...read more

Actuator is a device that converts electrical energy into mechanical motion.

• Actuators are used in HVAC systems to control the flow of air, water, or steam.

• They can be electric, pneumatic, or hydraulic.

• Examples of actuators include valves, dampers, and motors.

• Actuators are essential for maintaining temperature, humidity, and air quality in HVAC systems.

The refrigeration cycle is a process of removing heat from a space or substance. Types of chillers include absorption, centrifugal, and reciprocating.

• The refrigeration cycle involves four main components: compressor, condenser, expansion valve, and evaporator

• Absorption chillers use a heat source to drive the refrigeration cycle, while centrifugal and reciprocating chillers use mechanical energy

• Centrifugal chillers are ...read more