213 ppt4 Refrigerants Quiz

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