The main difference between an excavator and a mining shovel is this:
a. an mining shovel doesn't have tracks
b. mining shovels are always electrically driven c. an excavator has a short boom
d. an excavator pulls its bucket to fill it
D
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The Energy Policy and Conservation Act (EPCA) establishes _____________ ________ and greenhouse gas standards for the year 2017 and beyond.
Fill in the blank(s) with the appropriate word(s).
A rotary mower blade must be ____________________ after it's been sharpened
Fill in the blank(s) with correct word
Cotton is a shrublike _____ plant
a. Annual c. Biannual b. Biennial d. Perennial
What is the temperature rise of a furnace with a supply air temperature of 130°F and a return air temperature of 75°F, operating in an ambient temperature of 50°F?
A) 75°F - 50°F = 25°F temperature rise B) 130°F - 50°F = 80°F temperature rise C) 50°F + 75°F = 125°F temperature rise D) 130°F - 75°F = 55°F temperature rise