Soalan Penyejukbekuan

Which of the following is not a commercial refrigeration product?

• Cold room

• Chest freezer

• Display chiller

• Ice box

Choose the incorrect statement.

• In the compressor, liquid refrigerant at high pressure is compressed and sent to the metering device.

• In the evaporator, cold heat is absorbed inside the evaporator and expelled to the environment causing the room to become cold.

• The evaporation process occurs in the condenser where vapor is converted into liquid while heat is expelled to the external environment.

• The metering device increases pressure, causing the saturation temperature to become high.

The function of high pressure on the gauge is to

• Protect the system from excess pressure and provide a visual of refrigerant at evaporation pressure.

• Provide a visual regarding refrigerant at compression pressure.

• Provide a visual regarding refrigerant at evaporation pressure.

• Protect the refrigeration system to operate at the allowed low pressure.

__________________ prevents/removes moisture, dirt, and foreign substances in the refrigerant which can cause the system to fail, reduce efficiency, etc.

• Metering Device

• Filter Drier

• Filter dust

• Sight Glass

When bubbles of refrigerant appear on the SIGHT GLASS, this indicates

• Refrigerant is low

• There is moisture in the refrigerant

• Refrigerant is dirty

• Refrigerant pressure is low

The advantages of electronic thermostat or controller except

• Control and stabilize temperature

• Save energy and more efficient

• Can set time

• Can set temperature to meet cooling demand

What is the suitable temperature for storing meat and frozen food?

• -31 to -13 OF

• -4 to 5 OF

• 14 to 23 OF

• 32 to 41 OF

Cool room is

• A storage place for fresh, frozen, or chilled used in restaurants, hotels, supermarkets, and shops.

• A medium for storing food products or others for short or long-term storage.

• Using an evaporator placed in the inner part of the insulated box, while the condenser and compressor unit are on the outside. The connection of both uses GI pipes.

• A closed insulated box, with a door and has a cold storage space within a wide range of 3000 ft2 and can be used for storing all types of products.

Food storage for frozen food by manufacturers and the pharmaceutical industry requires

• Cold room with extremely low temperature (Ultra-low)

• Cold room with cold temperature

• Cold room with moderate temperature

• Cold room with high temperature

Cold room chiller differs from freezer in terms of

• Class and stage of storage temperature settings

• Insulation concept and type of compressor

• Highly efficient operation based on design capacity

• Building materials