Any substance or body that acts as a cooling agent by absorbing heat from another substance or body is called a _________________.

Another term used when referring to a “primary refrigerant” is a direct ________________ refrigerant.

Being easily detectable when leak testing, having a low boiling point and a low compression ratio are all _____________ properties of a good refrigerant.

Refrigerants are classified according to their ________________ content and composition.

The number, colour code, chemical name and chemical formula are usually placed on refrigerant cylinders to _________________ them.

Refrigerants are given _______________ numbers, which are used to assist in the identification process.

Refrigerant cylinders must never be stored in an area with a temperature ____________ 52°C.

_______________ cylinders are easily recognised by their yellow shoulders and grey body.

The only type of storage cylinder which is not made of steel is the _________________ one.

What does the abbreviation O.D.P. stand for with relation to the preservation of the atmosphere?