What is the buffer tank on an air-to-water heat pump system?
A) A tank in the suction line before the compressor that prevents liquid from returning to the compressor
B) A large insulated tank of water that balances fluctuations in load
C) A tank in the liquid line after the condenser that balances fluctuations in system capacity
D) A large insulated tank of water that is heated with electric heating elements and serves as a backup heat source
Question 2
Sealed combustion oil furnaces use:
A) A separate bottled oxygen supply for cleaner combustion.
B) Special sealed airtight barometric draft regulators.
C) High static oil burners.
D) No vent because the combustion chamber is sealed.