Understanding Transport Refrigeration

What are the two primary uses of rail car refrigeration?

• Cargo heating and passenger cooling

• Cargo refrigeration and comfort cooling

• Cargo freezing and comfort heating

• Cargo ventilation and driver cooling

How is rail car refrigeration typically powered when the car is in motion?

• Battery power

• Solar power

• Axle-driven compressors

• External electric grid

What cooling method is often used for intermodal shipping containers for short distances?

• Water cooling

• Liquid nitrogen

• Dry ice

• Electric fans

Which type of condenser is most commonly used in intermodal shipping container refrigeration systems?

• Air-cooled

• Water-cooled

• Chemical-cooled

• Ice-cooled

What is a key design consideration for marine refrigeration systems?

• Operation in freezing temperatures only

• Compatibility with freshwater

• Ability to operate in zero gravity

• Resistance to salt water and high humidity

Which compressor type is most efficient for yachts and sailboats with limited electric power?

• Open drive compressors

• Centrifugal compressors

• Hermetic compressors

• Semi-hermetic compressors

What is the primary advantage of using a keel cooler in marine refrigeration?

• It operates silently

• It uses sea water for cooling

• It requires no power

• It can cool and heat

How does the counterflow design in heat exchangers benefit marine refrigeration?

• Increases efficiency by flowing refrigerant and water in opposite directions

• Reduces the need for maintenance

• Allows for smaller system size

• Enables easier installation