Name two factors that have caused a switch away from petroleum fuels.

What will be an ideal response?


A barrel of crude oil is more expensive than a barrel of corn. Additional factors that
could cause a switch of fuel sources from petroleum to other technologies are the
environmental, political, and social benefi ts and costs associated with cleaning up
waste products.

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If valves are set loose, which of the following will result?

A. advanced valve timing B. hotter valve operating temperatures C. noisier valve operation D. retarded valve timing

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What should be done if the pH level of water in a chilled-water system is 7.2, add _____.

a. acid to the water b. alkalinity to the water c. nothing to the water d. a neutralizer to the water

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Which of the following are primarily designed for use with inductive motor loads and to withstand the interrupt current of a locked rotor?

a. Lighting contactors b. Definite-purpose contactors/motor starters c. NEMA-rated contactors/motor starters d. IEC-rated contactors/motor starters

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What were driving forces for Asian landscapes?

A) protection and isolation B) power and wealth C) symbolism and philosophy D) food and fiber

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