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WorksheetsWELCOME TEST
Total questions: 20
Worksheet time: 12mins
What is the function of a compressor in a refrigeration cycle?
A. Heat absorption
B. Heat rejection
C. Compress the refrigerant and raise its pressure
D. Reduce the pressure of refrigerant
In a refrigeration cycle, which component is responsible for absorbing heat?
A. Evaporator
B. Condenser
C. Compressor
D. Expansion valve
The process of removing moisture and air from a refrigeration system is known as:
A. Evacuation
B. Charging
C. Condensation
D. Pressurization
What is the typical function of a thermostat in an air conditioning system?
A. To regulate refrigerant flow
B. To control the cooling cycle based on room temperature
C. To increase system pressure
D. To eliminate moisture
In the refrigeration cycle, where does the refrigerant change from a liquid to a vapour?
A. Compressor
B. Condenser
C. Evaporator
D. Expansion valve
What happens to refrigerant in the condenser?
A. It absorbs heat
B. It condenses from a vapour to a liquid
C. It evaporates into a gas
D. It expands to a low-pressure vapour
What is the name of the new Principal of GTC Ikorodu?
(a)
What is the main purpose of an expansion valve in a refrigeration system?
A. To increase the pressure of the refrigerant
B. To regulate the flow of refrigerant into the evaporator
C. To convert refrigerant from liquid to vapour
D. To remove moisture from the refrigerant
In the refrigeration cycle, which component is responsible for rejecting heat to the surroundings?
A. Compressor
B. Condenser
C. Evaporator
D. Expansion valve
What component is the diagram above?
A. Thermostat
B. Electronic switch
C. Thermostatic Expansion Valve
D. Capillary tube
Which type of air conditioning system is typically used for large buildings or complexes?
A. Window AC
B. Split AC
C. Centralized air conditioning system
D. Portable AC
Which of the following is a sign of low refrigerant charge in an air conditioning system?
A. High cooling efficiency
B. Frost formation on the evaporator
C. Low pressure in the condenser
D. High airflow from the vents
What is superheating in refrigeration?
A. Heating the refrigerant above its boiling point
B. Cooling the refrigerant below its saturation temperature
C. Increasing the pressure of the refrigerant
D. Removing moisture from the refrigerant
Which material is commonly used for the refrigerant piping in air conditioning systems?
A. Steel
B. Aluminum
C. Copper
D. PVC
Another word for Refrigeration and Air Conditioning (RAC) is?
(a)
Which of the following best describes subcooling in refrigeration systems?
A. Lowering the temperature of the refrigerant below its condensation point
B. Raising the temperature of the refrigerant above its boiling point
C. Increasing the pressure of the refrigerant in the condenser
D. Lowering the temperature of the refrigerant below ambient air temperature
What type of device is used to measure pressure in a refrigeration system?
A. Hygrometer
B. Manometer
C. Thermometer
D. Anemometer
What is the ground rule of your class?
(a)
What is the name of the Executuve Secretary (ES) of LASTVEB?
(a)
What is the purpose of a filter-drier in a refrigeration system?
A. To remove air from the system
B. To prevent refrigerant leaks
C. To remove moisture and contaminants from the refrigerant
D. To increase the flow of refrigerant
