There is no real difference between biodiesel and petroleum diesel except for their energy density
Indicate whether the statement is true or false.
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?What is an example of a plastics that benefits from controlled, limited irradiation, with the result of elevating the softening temperature above that of boiling water?
A. ?polypropylene B. ?polyester C. ?polyethylene D. ?polystyrene
A wind gene?rator produced 
kwh during a 
hour period. What is the average hourly output of the generator?
Fill in the blank(s) with the appropriate word(s).
What characteristic limits the load a vacuum lifter is permitted to hoist, compared to standard hoisting devices?
a. Vacuum lifters are more expensive than other types. b. Vacuum lifters are not physically attached to the load. c. Vacuum lifters are more complicated than hook blocks. d. Vacuum lifters are made of weaker materials than other types.
Explain the proper bevel to prepare pipes for welding.
What will be an ideal response?