WorksheetsSoalan Mengenai Bahan Pendingin
Total questions: 10
Worksheet time: 5mins
What is the refrigerant that has been used the longest in early cooling systems?
R-600a
R-12
R-134a
R-717
What are the advantages of R-134a compared to R-12?
Does not have ODP
More toxic
Cheaper
Easily flammable
What is R-600a known as?
Isobutane
Methane
Propane
Ammonia
What is the safety symbol for easily flammable refrigerants?
Red triangle with fire
Blue circle with water droplet
Green square with leaf
Yellow triangle with electrical sign
What refrigerant is commonly used in vehicle AC systems?
R-12
R-22
R-134a
R-744
Why is R-717 less used in household appliances?
Very expensive
Toxic and has a pungent smell
Inefficient
Cannot be cooled
What is a mixture of refrigerants known as?
Azeotrop
Hybrid gas
Coolant mix
Refrigerant blend
What is an example of an azeotropic refrigerant?
R-500
R-134a
R-717
R-290
Refrigerants that are environmentally friendly usually have an ODP value of:
0
1
10
100
What is the main factor in choosing a refrigerant?
Color
Price only
Pressure, safety & environmental impact
Brand
