Wind turbines should be a minimum of ________ above anything with 500' of the turbine
A) 90' B) 30' C) 50' D) 20'
B
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Excessive toe-in will cause tire wear ________
A) On the outside shoulder of the tire B) On the inside shoulder of the tire C) On both tire edges D) In the middle of the tire
Heat pump A has a SEER rating of 16 and an HSPF rating of 7 Heat pump B has a SEER rating of 14 and an HSPF rating of 9. Which heat pump heats more efficiently?
A) Heat pump A B) Heat pump B C) They are about the same heating efficiency by the time both the SEER and HSPF are considered D) Neither the SEER nor the HSPF can determine which heat pump heats more efficiently
How many time constants will it take to completely collapse an inductor's magnetic field?
A) 1 B) 3 C) 5 D) 4
Why would a temperature-differential defrost system NOT complete the defrost cycle?
A) There is too much heat available during defrost. B) There is a refrigerant undercharge. C) The system defrosts too frequently. D) The fan blows warm air across the coil.