When soil or gravel is excavated, the resulting material is less dense than it was in the ground before it was disturbed. This same material now occupies more volume, a concept called the ____.
A. compaction factor
B. swell factor
C. stability factor
D. growth factor
Answer: B
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Newly placed conventional concrete must be kept moist for five to seven days so that it will _____.
a. cure b. settle c. mature d. segregate
What is meant by the “critical point” of refrigerants like CO2?
a. The temperature above which it can’t condense no matter how high the pressure. b. The temperature where it exists in 3 states: liquid, vapor, and solid. c. The temperature at which it may explode if too much pressure is applied.
Turning the oil pump before starting the engine should be done for all of these reasons, EXCEPT ________
A) Lubricate valve train components B) To get the distributor in the right position C) Supply oil to the camshaft D) Lubricate engine bearings
Another name for perpendicularity is ____________________.
Fill in the blank(s) with the appropriate word(s).