On a dual fuel heat pump, why does the heat pump outdoor unit normally shut off when the furnace comes on?
A) the hot air leaving the furnace would cause very high head pressures on the heat pump
B) the air can only go across one appliance at a time
C) the combined amp draw of the furnace and heat pump is too high
D) with both operating, the hot supply air causes customer complaints
A
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Answer the following statements true (T) or false (F)
1) A white cheesy coating on the tongue and night sweats can be symptoms of AIDS. 2) AIDS is known to be transmitted through handshakes, toilet facilities, and eating utensils. 3) High-risk groups with regard to AIDS include sexually promiscuous people who do not take appropriate precautions and IV drug users. 4) AIDS cannot be contracted through blood transfusions. 5) AIDS is having little effect in the workplace.
Which of the following electromagnets would produce the greatest magnetomotive force?
A. A coil of wire with 1,000 turns and 10 amperes of current B. 10,000 ampere-turns wrapped around an iron core C. 100 turns of wire flowing 50 amps of current D. 1 amp of current through 5,000 turns of wire
What is the difference between exhaust air and ventilation air?
What will be an ideal response?
What type of filter frequencies greater than the break frequency provides a significant output?
A. Low pass B. RC C. RL D. High-pass