A purchase of 2,500 feet of number 14 double-braided, rubber-covered wire is made for a job. On November 1, 978 feet of this wire are used, and on November 3, 1,023 feet are used. How many feet of wire are left?
Fill in the blank(s) with the appropriate word(s).
499
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All views have a particular position with respect to each other, and have either a horizontal or vertical alignment.
Answer the following statement true (T) or false (F)
How does certification affect heating equipment in the United States?
A) All heating equipment undergoes voluntary testing and certification by accredited testing agencies. B) All gas appliances are exempt from certification but must be tested by an accredited testing agency. C) Only electric heating equipment is required to have testing or certification by an accredited testing agency. D) All heating equipment must be tested, certified, or listed by an accredited testing agency.
Which of the following is an incorrect statement regarding the venting of a condensing furnace?
a. The intake and exhaust vents should be close together. b. The diameter of the vent pipe is based on the furnace input, the length of the vent, and the number of elbows. c. Installation guidelines for Category IV furnaces should be followed. d. The exhaust vent termination should be turned downward.
?What is the formula for Ohm's Law (in which E = volts, I = amperes, and R = resistance)?
A. ?I = E´R B. E = I´R C. ?R = E´I D. ?All of the above