A geothermal heat pump system:
A) Uses the ground as a heat source in both heating and cooling.
B) Uses the ground as a heat sink in heating and a heat source in cooling.
C) Uses the ground as a heat sink in both heating and cooling.
D) Uses the ground as a heat source in heating and a heat sink in cooling.
D
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The electronics in the rain-sense wiper module can detect the presence of rain drops under various lighting conditions. Which of these solid state components is used to sense rain drops?
A) Photo Diode B) Infrared light sensor C) Laser LED D) Any of these
Two technicians are discussing vacuum brake boosters. Technician A says that a low, soft brake pedal is an indication of a defective booster. Technician B says that there should be at least two power-assisted brake applications after the engine stops running. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
All switches illustrated in schematics are ________
A) Shown in their normal position B) Shown in their on position except for lighting switches C) Always shown in the off position D) Always shown in the on position
Water-cooled chillers must have water treatment to ____.
A. increase the pH content of the water B. decrease the pH content of the water C. minimize mineral and algae deposits D. help preheat the water in the condenser circuit