If a fuel cell is to be truly emissions-free, which of the following should be true regarding the source of the hydrogen?

A. produced using hydro-electricity
B. reformed using propane
C. produced using coal-driven electricity
D. reformed using gasoline


Answer: A

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A solar collector has 16 rows of 4 ft. 4 in.? lengths of copper tubing painted black.  What is the total length of black tubing in the collector?

Fill in the blank(s) with the appropriate word(s).

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A required topic in the OSHA-10 program is _____.

a. Focus Four Hazards b. Six Safety Areas c. Three Toxic Agents d. Top Ten Threats

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What determines the amount of valve overlap?

A) Cam lobe accuracy B) Total lift in degrees C) Camshaft design D) Timing gears or chain

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The three different phases or states of matter include _________________

A) Solid, water, and steam B) Ice, liquid, and gas C) Solid, liquid, and gas D) Liquid, water, and steam

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