Chapter 60

The ____________, which during a cooling cycle transfers heat from the refrigerant to the atmosphere, is not included in the heating cycle.

• a.Refrigerant

• b.Condenser

• c.Evaporator

• d.Compressor

Technician A says temperature-sensitive produce should be transported in a temperature-controlled reefer. Technician B says that, in terms of product temperature control, some trailers and truck boxes have only heating systems to protect temperature-sensitive products from freeze damage when transporting in very cold climates and winter weather. Who is correct?

Select one:

• Tech A

• Tech B

• Both Techs

• Neither Tech

Very damp products are commonly termed __________ load.

Select one:

• a.Perishable

• b.Heat

• c.Wet

• d.Fresh

Which of the following is a common term for truck-trailer temperature-control systems?

Select one:

• a.Vibrasorbers

• b.Multi-temp units

• c.Reefers

• d.Wet loads

Which of the following refers to heating or cooling over a wide range of outside temperatures and product storage temperatures?

Select one:

• a.Vehicle-powered refrigeration

• b.Transport temperature control

• c.Self-powered refrigeration

• d.Multi-temperatures system

Insulation in the ceilings and walls of a refrigerated truck or trailer minimizes heat transfer through __________.

Select one:

• a.Absorption

• b.Convection

• c.Evaporation

• d.Conduction

Powerful evaporator fans blowing increase what type of heat movement inside a cooled container?

Select one:

• a.Radiation

• b.Convection

• c.Circulation

• d.Conduction

Door seals are carefully designed and must be maintained to __________.

Select one:

• a.Keep dirt and dust from contaminating the cargo

  within the unit

• b.Keep warm, moist air out of the box

• c.Stop any liquids from escaping from the unit

• d.Maintain the recommended air flow

The cooling or heating capacity of a reefer is measured in __________.

Select one:

• a.Degrees Celsius

• b.Cubic meters

• c.Degrees Fahrenheit

• d.BTU/hr

Heat enters the refrigerated area from sources other than the passenger cabin. All of the following are heat-producing sources, EXCEPT:

Select one:

• a.Product that is loaded when warm

• b.The sun and high outside temperatures

• c.Doors being kept shut and sealed

• d.Cargo ripening