D2L Assignment Flashcards
What term is used for the type of heat energy that can pass through a vacuum?
Radiation
How does heat energy move within a body of fluid?
Convection
How does heat energy move through solids?
Conduction
What is the term for heat energy that brings about a change of state?
Latent Heat
What is the term for heat energy that can be measured by a thermometer?
Sensible Heat
What describes the effect of pressure on the boiling point of a liquid?
An increase in pressure leads to an increased boiling point
What is the primary purpose of gas plant refrigeration processes?
To separate liquefied petroleum products from natural gas
What is the purpose of the condenser in the refrigeration cycle?
To reject heat from the circuit
What is the evaporator’s function in the refrigeration cycle?
To absorb heat from the refrigerated space
What vapour is found in the suction line of a refrigeration system?
Cool low-pressure vapour
What vapour is found in the discharge line of a refrigeration system?
Hot - high pressure vapour
Which piping material is suitable for use with ammonia refrigerant?
Steel
What gas is used to displace air when brazing copper refrigerant lines?
Nitrogen
What is a vacuum pump used for in a refrigeration system?
to remove air and moisture
Which component of a flooded refrigeration system is ‘flooded’?
Evaporator
What is a common maintenance procedure done on an ammonia chiller?
Drain Oil
Why is brine used for ice rink refrigeration systems?
To ensure an ammonia leak does not harm athletes or spectators
What type of refrigeration system uses a low-pressure receiver and a liquid refrigeration circulation pump?
Liquid overfeed system
What is a readily available source of heat that is often used for defrosting the evaporator in liquid overfeed systems?
Hot Refrigerant Vapour
What refrigerant is used in a gas plant?
Propane
Which type of refrigeration system requires a heat source and has no compressor?
Absorption chiller
What is the refrigerant used in a lithium bromide refrigeration system?
Water
What is the purpose of the vented brine tank in a flooded refrigeration system?
It prevents pressure from building in the brine circuit
What should you do if you are splashed with ammonia?
Flush area with plenty of water
