1. 1.10 What must roof corrections be based on?1) a. The density or API gravity at the observed temperature of the oil in the tank
2) b. The density or API gravity at standard temperature of the oil in the tank
3) c. The barrels per inch calculated from the tank capacity table
4) d. The critical zone
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2. 1.02 Density of any substance is the ratio of its mass to its volume, usually at a specified temperature. Relative Density is the ratio of the density of a substance at a specified temperature to the density of what other substance?1) a. Pure ethanol at the specified temperature
2) b. Acetone at the specified temperature
3) c. Pure water at the specified temperature
4) d. Vegetable oil at a specified temperature
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3. 1.18 What is generally accepted as the density of pure water at 15°C [API Gravity at 60°F]?1) a. 60 kg/m3 [6]
2) b. 1000 kg/m3 [10]
3) c. 14.5 kg/m3 [15]
4) d. 1.0 kg/m3 [1]
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4. 1.24 What term has been replaced by relative density?1) a. Density in vacuum
2) b. Density in air
3) c. Specific gravity
4) d. Gravity by pyknometer
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5. 1.25 What is the formula to calculate API gravity at 60°F when relative density is known?1) a. (141.5 ÷ Relative Density @ Observed Temperature) - 131.5
2) b. (141.5 + Relative Density @ 60/60F) -131.5
3) c. (131.5 ÷ Relative Density @ 60/60F) - 141.5
4) d. (141.5 ÷ Relative Density @ 60/60F) - 131.5
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