The first law of thermal dynamics states that heat cannot be created, destroyed or moved.

• False
• Heat can be destroyed
• Heat can be created
• True

The hand valves on the manifold gauge set should be seated before connecting the gauge set to the A/C system.

• False
• Not sure
• Maybe
• True

The quick connect couplers (low loss fitting) should be __________ seated before hooking the gauge set up to the A/C system.

• loosely
• incorrectly
• tightly
• properly

What is used on the O-rings when installing?

• Water
• A.C. Lubricants

• Sand
• Glue

O-rings only need replaced when they are cut or distorted.

• False
• Only if they are dirty
• Only if they are too old
• True

Refrigerant after recycling is considered new and resalable.

• Not sure
• Partially true
• False
• True

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

NGSS.HS-LS2-7

Which item is the compressor?

• The small box in the corner
• It is the machine with the label 'compressor' on it.
• The chair in the room
• The computer monitor

Which item is the condenser?

• It is a component in a stereo system used to condense the refrigerant.

• It is a component in a heating system used to condense the refrigerant.

• It is a component in a refrigeration or air conditioning system used to condense the refrigerant.

• A type of flower in a refrigeration or air conditioning system used to condense the refrigerant.

What is the purpose of orifice tube?

• To control the temperature of the air conditioning system
• Regulate the flow of refrigerant in the air conditioning system
• To filter the air in the car
• To regulate the pressure of the tires

What is the purpose of the evaporator?

• To increase the pressure of the liquid refrigerant
• To cool down the surrounding air
• To add heat to the liquid refrigerant
• To remove heat from the liquid refrigerant

Tags

NGSS.HS-PS3-4