Natural gas is the cleanest burning of the fossil fuels and its combustion produces about _______________ percent less carbon dioxide compared to burning petroleum based fuels
Fill in the blank(s) with the appropriate word(s).
forty-five
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What electrical current uses a back-and-forth movement of electrons in a conductor?
A) AC B) DC C) EC D) PC
?What is the purpose of the filler passes?
A. ?They add the bulk of the weld metal to the groove. B. ?They are used to push any lack of root fusion or lack of 100% penetration. C. ?They are used to remove any small trapped pieces of slag or lack of side wall fusion. D. ?They are used to cover up any problems in the hot pass.
If an automatic transmission vehicle will start in any gear, the neutral safety switch is probably at fault.
Answer the following statement true (T) or false (F)
Which of the following statements is correct about the style in which the NEC® is written?
A. It is generally written in “performance” style that states the safety goals to be achieved. B. It is generally written in a “legal” style so that the installer will be more likely to comply with the requirements. C. It is generally written in “prescriptive” style that states how the installation must be made. D. It is written in neither “performance” nor “prescriptive” style.