Explain how major heating and cooling appliances may work in opposition to one another, making the home less energy efficient.
What will be an ideal response?
Take for example a refrigerator and a freezer operating in an air conditioned home during the hot days of summer.
Both appliances use refrigeration units driven by electric motors to extract heat from their interiors and keep them
at the required low temperatures. But the excess heat removed is then vented directly into the kitchen where the
appliances are located. This heat warms the room and makes the air conditioning system work harder (consuming
more power) to keep the room temperature at a comfortable level. A cooking appliance such as a stove, grill or
toaster also adds heat to the kitchen which the air conditioning system must then overcome. Similarly, a hair dryer
can easily raise the temperature in a bathroom by 15 degrees or more, again making the air conditioning work
harder to overcome the excess heat.
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The high surface tension of molten ____ makes it easier to control large molten weld pools.
A. low carbon B. aluminum C. mild steel D. stainless steel
What factors could cause poor soil conditions in urban areas?
What will be an ideal response?
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When checking a vehicle for a no-crank condition the starter clicks and the headlights do not dim. What should the technician do next?
A) Replace the ignition switch B) Replace the starter C) Check for voltage at the starter "S" terminal D) Check for voltage at the battery