Worksheets213 ppt4 Refrigerants Quiz
Total questions: 14
Worksheet time: 7mins
What is the primary use of refrigerants?
To heat water
To cool air or refrigerate
To generate electricity
To insulate buildings
What is an example of a refrigerant mentioned in the text?
R22
R134a
R410a
R12
What is the freezing temperature of the anti-freeze solution shown in the image?
-20°C
-40°C
-58°C
-10°C
What is the main function of the Glycol solution in heating systems?
To increase efficiency
To prevent freezing
To reduce noise
To clean the system
Heavy oils are used in which type of burners?
Domestic burners
Industrial burners
Commercial burners
Portable burners
Why do fuel oils float on water?
They are more dense than water
They are less dense than water
They are the same density as water
They are magnetic
What is the use of heavier fuel oil?
Used in chemical production
Used in industrial heat raising plant
Used as a fuel for diesel engines
Used in aircraft
What is refinery gas primarily used as?
A lubricant
A fuel
A solvent
A cleaning agent
Which oil is used in chemical production?
Diesel oil
Kerosene
Naphtha
Residue
What is the pour point?
The temperature at which the oil is viscose enough to be poured
The temperature at which the oil starts to produce flammable vapors
The ability of the oil or substance to flow
The temperature at which the oil freezes
Which fuel has the lowest flash point?
Kerosene
Gas oil
Heavy oil
Diesel
What can excessive heat during metal cutting cause?
Improved metal quality
Damage
Faster cutting
Color change
Which grease is known for being waterproof?
Copper grease
Graphite grease
Silicone grease
Lithium grease
What is the primary function of silicone grease?
To act as a sealant
To preserve components
To conduct electricity
To polish surfaces
