How can you lower the temperature at which evaporation takes place?
A) Add more refrigerant into the pump.
B) Decrease the pressure on the high side of the pump.
C) Reduce the pressure on the low side of the system.
D) Raise the pressure on the low side of the pump.
C
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Never blow shop air into the evaporative system or the fuel filler neck.
Answer the following statement true (T) or false (F)
Which type system uses a one speed transfer case and a center differential with a viscous coupling?
A) Full time 4WD with automatic locking hubs B) Part time 4WD C) All wheel drive D) Full time 4WD
Where on the enthalpy diagram is refrigerant saturated?
A) Everything to the right of the saturated line of demarcation B) Everywhere on the chart is saturated because the enthalpy diagram is specifically for saturated refrigerant C) On and Inside the saturation curve D) There are no areas of saturation because the enthalpy chart is for gases.
The high-temperature limit switch mounted above or beside the heat exchanger of a gas furnace should
cycle open if _____. a. a flame rollout occurs b. the outdoor temperature exceeds 75°F c. there is insufficient combustion air d. the blower fails to operate