Reheating a hardening component to a temperature lower than the hardening temperature and then cooling it is known as （）

A、low temperature hardening

B、case hardening

C、annealing

D、tempering

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更多“Reheating a hardening component to a temperature lower than the hardening temperature and then cooling it is known as （）”相关的问题

第1题

[单选题] To prevent the unnecessary loading of an air conditioning system while maintaining the designed dry bulb temperature and relative humidity in an air conditioning system, you should （）

A、admit only enough fresh outside air to provide proper ventilation B、reduce the air reheating system load C、lower the compressor head pressure D、operate the purge recovery unit continuously

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第2题

[] To prevent the unnecessary loading of an air conditioning system while maintaining the designed dry bulb temperature and relative humidity in an air conditioning system, you should （）

A、A.admit only enough fresh outside air to provide proper ventilation B、B.reduce the air reheating system load C、C.lower the compressor head pressure D、D.operate the purge recovery unit continuously

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第3题

[单选题] Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system?（）

A、Cooling the air to a temperature just above dew point B、Heating the air to a point at which moisture will boil off ,then re-cooling it C、Cooling the air to a point below dew point, then reheating it D、Heating the air and then cooling it to a point below dew point