Contactors that are designed to control direct-current devices are generally of the ____________________ type.
Fill in the blank(s) with the appropriate word(s).
clapper
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Before removing the instrument panel, always disconnect the battery negative cable.
Answer the following statement true (T) or false (F)
The four types of cooling mechanisms are:
A) Absorption, adaptive compression, conductive, resistive. B) Evaporative, thermoelectric, absorption, mechanical compression. C) Evaporative, conductive, resistive, mechanical. D) Mechanical compression, electrical compression, adaptive expansion, thermoelectric.
If an air-conditioning system is operating with an 80°F return air temperature and a 50°F supply air temperature:
A) The large temperature drop indicates excessive airflow. B) You should be happy the air is so cold. C) The system is operating correctly. D) The large temperature drop indicates the airflow is less than required.
Flue gas condensation can be prevented by:
A) Using double wall vent. B) Running a dehumidifier in the room with the furnace. C) Using single wall vent. D) Passing the combustion gases over a dehumidifier before sending them up the vent.