Why does high-efficiency air-conditioning equipment use a thermostatic expansion valve?
What will be an ideal response?
High-efficiency air-conditioning equipment often uses a thermostatic expansion valve rather than a fixed-bore metering device because a certain amount of efficiency may be gained.
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Dehumidification makes us feel cooler by
A) speeding up the process of evaporation on our skin B) slowing down the process of evaporation on our skin C) actually reducing the air temperature through evaporation in the dehumidifier D) improving the efficiency of air cooled condensers
Before changing accessories or performing maintenance on a power tool, make sure _____
a. it is turned off b. your hands are dry c. to have a clean work surface d. the power is disconnected
A float switch is used when a pump motor must be started and stopped according to changes in the water (or other liquid) level in a tank or sump.
Answer the following statement true (T) or false (F)
A typical lawnmower should be used with hearing protection
Indicate whether the statement is true or false