HVAC Study Questions with Correct Answers

HVAC Study Questions with Correct Answers Which of these heating methods is most commonly used as a heat source in cold climates? - Answer-Natural gas furnaces Which of the following is a device used to maintain indoor air quality? - Answer- Ultraviolet light The purpose of an evaporator in the refrigeration cycle is to - Answer-transfer heat from the air to the refrigerant Heat can be transferred from a refrigerant to the outdoors on a hot day because the - Answer-refrigerant is warmer than the outdoor air The expansion device in a mechanical refrigeration system . - Answer-provides a pressure drop Oxygen is never used to purge an HVAC system because . - Answer-an explosion could occur under certain conditions Which of these devices is used for energy conservation? - Answer-Heat recovery ventilator In order to reduce duct leakage, ducts should be sealed with . - Answer-mastic If a refrigerant is removed from a system and held in a storage tank for return to the same system, it is said to have been . - Answer-recovered Local building codes are based on the . - Answer-International Building Code Refusing to cut corners on a job is an example of . - Answer-honesty Speaking well of your employer to others is an example of . - Answer-loyalty How many hours each year does a typical apprenticeship trainee spend in the OJL? - Answer-2,000