J106A 2

RMD stands for

• remote metering device

• refrigerant meeting device

• refrigerant metering device

• remote meeting device

An example of a fixed orifice metering device is

• TEV

• TXV

• AEV

• Capillary

The function of a refrigerant metering device is to:

• provide sufficient liquid refrigerant to maximise efficiency

• provide pressure regulation to enforce latent heat

• achieve pressure drop across the evaporator

• remove any incondensables from circulation around the system

The flow rate of a refrigerant is controlled by the

• compressor

• RMD

• liquid receiver

• condesation

Superheated refrigerant is

• below saturation

• liquid

• above saturation

• hot

Draw in the superheated pipes only

Regulating the flow of refrigerant is to

• let the compressor work

• keep it safe

• keep efficiency

• let the condenser absorb heat

Why do we keep a stable pressure in the evaporator

• To allow the latent heat change in the refrigerant at a certain temperature

• to restrict the latent heat change

• to remove temperature from the refrigerant at said pressure

• to enforce the specific heat capacity on the refrigerant

When checking evaporator superheat we measure the temperature

• at the outlet of the RMD

• at the outlet of the compressor

• at the outlet of the condenser

• at the outlet of the evaporator

When adjusting a tx valve screw, if you turn the screw clockwise are you increasing or decreasing the pressure against the bulb pressure

• increasing

• decreasing

• neither, same side of diaphram

• which way is clockwise?