The ducts normally used are made of

Which one of the following is also a current type relay

Which one of the followings is not a secondary refrigerant

Which one of the followings is used as refrigerant in an ice plant

Evaporator of a refrigerator is also known as

Which one of the following types of condenser is used in a window air conditioner?

Constant pressure expansion valve is also known as

Which one of the followings is used as a refrigerant control device in a refrigerator

Drier in a refrigeration system is used to

In an evaporative condenser which of the following is used as cooling medium