WorksheetsRefrigeration Quiz
Total questions: 36
Worksheet time: 19mins
In most refrigeration systems thermostats use a ______________
Fuse
Sensing bulb
Thermistor
Valve
Compressor knock maybe caused by loose ______________
Discharge lines
Internal components
Suction line
Vapour line
What is a material used in domestic refrigeration unit?
Steel
Brass
Cast iron
Copper
What is a metering device used in domestic refrigerators?
High side float
Thermostatic expansion valve
Capillary tube
Electronic expansion valve
Which statement best describes the function of refrigerants?
Release heat inside the evaporator
Absorbs heat outside the evaporator
Absorbs heat inside the evaporator
Produces heat in the cabinet
Condensers are maintained by____________
Oiling
Greasing
Cleaning
Levelling
In a refrigeration system, sub-cooling of the refrigerant takes place in___________
Compressor
Expansion valve
Condenser
Evaporator
__________is a hydrocarbon refrigerant.
R 717
R134a
R 22
R 600a
The refrigerating capacity is measured in ________________
Kilojoules
Kilowatts
Kelvin
Newtons
______________is a factor to consider during installation of a refrigeration unit.
Place the unit next to heat source
The kind of food products stored
Check for damages on the unit
Color of the unit
The refrigerating capacity is measured in
The liquid receiver is located between the evaporator and the compressor
True
False
A sight glass is located between the RMD and the evaporator
True
False
The TX valve bulb is located between the compressor and the condenser
True
False
Translate this question to English language
True
False
Which of the following components are in vapor compression cycle?
Compresssor
Condenser
Evaporator
All of the above
WHAT IS THE ROLE OF THE CONDENSER
ABSORBS HEAT
METERS REFRIGERANT
CONDENSES GAS
REJECTS HEAT
What does the expansion system do in a refrigeration cycle?
Increase pressure
Turn liquid into gas
Absorb heat
Lower temperature
What is the function of a condenser in a refrigeration system?
Increase temperature
Turn gas into liquid
Lower pressure
Lower temperature
What does the evaporator do in a refrigeration system?
Increase pressure
Turn gas into liquid
Lower temperature
Absorb heat by evaporating refrigerant liquid
Which type of compressor is designed for commercial and industrial use and offers efficient power regulation?
Scroll compressors
Piston compressors
Screw compressors
Helical screw compressors
Which type of valve is designed to prevent an overload of the compressor's motor?
Ball valves
Thermal expansion valve
Solenoid valves
Carter in-line pressure valves
Which type of compressor is suitable for many refrigerants and is compact?
Scroll compressors
Piston compressors
Screw compressors
Helical screw compressors
Which type of valve controls the flow of liquid refrigerant entering the evaporator?
Solenoid valves
Ball valves
Thermal expansion valve
Carter in-line pressure valves
What is a refrigerant in a refrigeration system?
A tool for generating electricity
A component that increases humidity
A chemical substance that absorbs heat
A device that compresses gas
What are the two main types of refrigerants mentioned in the text?
Chlorofluorocarbons and Hydrocarbons
Carbon dioxide and Hydrocarbons
Hydrochlorofluorocarbons and Ammoniac
Hydrofluorocarbons and Chlorofluorocarbons
What is the purpose of the engineering phase in a refrigeration project?
To evaluate thermal charges
To increase energy consumption
To assess the needs and viability of the project
To determine the cost of the project
What is the main purpose of a compressor in a refrigeration system?
Create cold
Generate electricity
Eliminate heat
Increase humidity
Which type of refrigerant is an alternative to synthetic ones and has low Global Warming Potential?
Ammoniac
Chlorofluorocarbons
Carbon dioxide
Hydrochlorofluorocarbons
Which component is responsible for controlling the temperature of the evaporator in an industrial refrigeration system?
Solenoid valves
Thermal expansion valve
Condenser pressure-regulating valves
Evaporator pressure-regulating valves
What is the purpose of a scroll compressor in an industrial refrigeration system?
To rotate refrigerant
To create cold
To compress refrigerant between two scrolls
To increase pressure
What is the function of a hermetic compressor in a refrigeration system?
To create cold
To compress refrigerant in a gaseous state
To absorb heat
To increase humidity
- a chemical compound used in an A/C system to remove heat from the evaporator and transfer it to the condenser.
refrigerant
coolant
hydraulic oil
anti-freeze
a device, similar to a radiator, in which the refrigerant loses heat and changes state from a high-pressure gas to a high-pressure liquid as it dissipates heat to the surrounding air.
condenser
compressor
evaporator
radiator
What is the function of the Expansion Valve in the air-conditioning system?
Provides accurate regulation for optimal efficiency and performance under changing loads
Maintains a fixed opening for refrigerant flow, providing a constant flow rate
Dynamically adjusts refrigerant flow based on system needs, ensuring precise control
Regulates the passage size to respond to changing conditions, ensuring precise control
- to remove refrigerant from an A/C system and store it temporarily.
refrigerant recovery
coolant recovery
recharge
vacuum
What do air conditioning systems release that can harm the environment?
Sunshine
rain water
greenhouse gases
coolair
Use of BTU (British Thermal Units)
Determine the required cooling capacity based on the size of the space
Determine the load present in the room.
Determine the type of air conditioner
Choose the correct answer (ONLY 1 ANSWER APPLIES)
What tool is used to check for leaks when using dye?
What is the suitable way to identify leak on the A/C system?
Soap solution
Infrared system
Electronic leak detector
Compression tester
Ultraviolet fluorescent system
Which of the following below is NOT the types of refrigerant used on vehicle?
R134a
R32
R1234yf
R410a
R12
The process of lowering the temperature of a substance below that of its surroundings
air conditioning
condensation
evaporation
refrigeration
What is a heat exchanger that induces condensation on the pressurized refrigerant, so that it changes phase from a gas to a liquid?
condenser
evaporator
expansion valve
radiator
What are the potential benefits of using natural ventilation instead of air conditioning?
Increased energy consumption and greenhouse gas emissions
Reduced energy consumption, improved indoor air quality, and less environmental impact
Increased reliance on fossil fuels
No benefits, as natural ventilation is less effective than air conditioning
What is the impact of air conditioning on the ozone layer?
Air conditioning has no impact on the ozone layer
Air conditioning helps in preserving the ozone layer
Air conditioning contributes to the depletion of the ozone layer due to the release of certain refrigerants
Air conditioning helps in the formation of the ozone layer
Refrigeration refers to the process of______
Maintaining the temperature constant
Cooling the space
Heating the space
preserving food stuff
Choose YES or NO: Are most of the refrigerants flammable?
Yes
No
State TRUE or FALSE: The refrigerant helps absorb heat from the food kept in a refrigerator.
False
Yes
