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
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
What were driving forces for Asian landscapes?
A) protection and isolation B) power and wealth C) symbolism and philosophy D) food and fiber
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