VRF quiz

What are the 4 main parts of a refrigeration system

• Compressor

• Capacitor

• Condenser

• Expansion valve

• Evaporator

The condenser and evaporator act as what?

• Heat anticipators

• Heat recovery

• Heat exchangers

• Heat reflectors

Tags

NGSS.HS-PS3-4

The refrigerant flows from the compressor to the​ (a)   entering as a superheated high pressure vapor and leaves as​ (b)   from there it travels to the ​ (c)   and enters the ​ (d)   In the evaporator it​ (e)   and absorbs heat before returning to the compressor.

• Condenser
• High pressure liquid
• Low pressure liquid
• expansion valve
• evaporator
• Boils
• condenses

Tags

NGSS.HS-PS3-4

What type of metering devices are used on VRF systems.

• Thermostatic expansion valves

• Hydraulic expansion valves

• Electronic expansion valves

• Low side floats

Electronic expansion valves use ------ to control superheat.

• Thermal bulb and a valve

• Sensors and a controller

• power supply and a motor

• Power head and valve body

Tags

NGSS.HS-PS3-4

The connection between the evaporator and the compressor is known as?

• The liquid line

• The hot gas line

• The suction line

• The mixed line

A VRF system uses this to change the speed of the compressor and control refrigerant flow.

• Clutch

• Inverter

• Potentiometer

• Reduction drive

Tags

NGSS.HS-PS3-3

A VRF system that is able to provide heating and cooling to different rooms at the same time is known as?

• Heat pump VRF system

• Reversing VRF system

• Heat cool VRF system

• Heat recovery VRF system

How many lines run between the outdoor unit and the branch controllers on a heat recovery VRF system?

• 1

• 2

• 3

• 4

A heat recovery system operating in mixed mode and equal heating and cooling loads is able to?

• Transfer the heat outdoors

• Bring the heat from outdoors in

• Transfer the excess heat from one room to another.

• None of the above

Tags

NGSS.HS-PS3-4