Improvements in annual fuel utilization efficiency have been achieved by which of the following? Select all that apply.
A) Heavier heat exchangers.
B) Better control of air/fuel ratio.
C) Electronic ignition.
D) Higher heating value in fuel gases.
B) Better control of air/fuel ratio. and C) Electronic ignition.
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The back electromotive force is the amount of voltage produced in the starting winding of a motor.
Answer the following statement true (T) or false (F)
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A fuel cell produces electricity from ________ and ________
A) Nitrogen; hydrogen B) Hydrogen; oxygen C) Gasoline; oxygen D) Water; oxygen
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Calculate and plot the percentage of each fuel used in generating electricity for each year shown in the table.
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A(n) ____ is a trim board placed at the end of the rafter or truss tails that are parallel to the building wall.
A. rafter B. cornice C. fascia D. eave
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