TE QUIZ 04

Which of the following is NOT a common classification criterion for refrigeration systems?

• Working principle

• Type of energy used

• Color of the refrigerant

• Application purpose

In the refrigerant designation system, R-134a represents:

• A zeotropic mixture

• An azeotropic mixture

• A hydrofluorocarbon (HFC)

• A hydrochlorofluorocarbon (HCFC)

The primary function of the expansion device in a vapor compression refrigeration system is to:

• Increase the pressure of the refrigerant

• Reduce the pressure of the refrigerant

• Increase the temperature of the refrigerant

• Increase the enthalpy of the refrigerant

The Coefficient of Performance (COP) of a refrigeration system is defined as:

• Refrigeration effect divided by work input

• Work input divided by refrigeration effect

• Sum of refrigeration effect and work input

• Refrigeration effect multiplied by work input

In an ammonia-water absorption refrigeration system, ammonia serves as the:

• Absorbent

• Refrigerant

• Catalyst

• Heat transfer medium

The Lithium Bromide-water absorption system is primarily used for:

• Domestic refrigeration

• Commercial air conditioning

• Industrial freezing

• Ultra-low temperature applications

In a Lithium Bromide-water absorption system, the refrigerant is:

• Lithium Bromide

• Water

• Ammonia

• Freon

Which component is NOT present in a vapor absorption refrigeration system?

• Generator

• Absorber

• Compressor

• Condenser

The main advantage of vapor absorption refrigeration systems over vapor compression systems is:

• Higher coefficient of performance (COP)

• Ability to use low-grade thermal energy

• Lower initial cost

• Simpler construction

In a vapor compression cycle, the refrigerant leaves the compressor as:

• Saturated liquid

• Saturated vapor

• Superheated vapor

• Subcooled liquid