___________ ____________ _______________ is determined by the ratio of usable power at the crankshaft to the power supplied to the engine as the energy content of the fuel.
Fill in the blank(s) with the appropriate word(s).
Gasoline engine efficiency
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Mr. Gamez has 180 pecan trees. He had a yield of 52 pounds of pecans per tree. Three-fifths of the pecans are sold as shelled nuts. He cut 5 trees damaged in a storm into logs. He had five logs 10 feet long with a 28-inch diameter at the small end and three logs 14 feet long with a 20-inch diameter at the small end. He used Doyle log rule to find approximate board feet of usable lumber in the logs.
Doyle log rule formula: 
Where: BF is the approximate board feet of usable lumber in a log.
d is the diameter of the small end of the log, in.
l is the length of the log, ft.
PROBLEM 3.131 Shafts A and B are made of the same material and have the same length and cross-sectional area, but A has a circular cross section and B has a square cross section. Determine the ratio of the maximum values of the angles and when the two shafts are subjected to the same maximum shearing stress Assume both deformations to be elastic.
The practical unit of electrical charge is the ____.
a. watt b. ohm c. volt d. coulomb
____________________ are often used to check motor windings. These meters measure resistance in millions of ohms and are generally employed to test insulation resistance.
Fill in the blank(s) with the appropriate word(s).