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16. Sperm oil was clear, nearly odorless, light in weight, and burned with …
a) little smoke
b) huge fair
c) a lot of smoke
d) no correct variant

17. What was the best oil to burn in lamps?
a) bear oil
b) seal oil
c) sperm-whale oil
d) no correct variant

18. What was brighter than candles in that time?
a) whale oil
b) oil lamps
c) candles were the best
d) no correct variant

19) When did the story of oilwell drilling begin?
a) in the mid-1900s
b) in the mid-1700s
c) in the mid-1800s
d) no correct variant

20.Find the meaning of the term “barrel”:
a) a unit of capacity used in the oil and other industries, normally equal to 42 US
gallons or 35 Imperial gallons
b) a unit of volume in the U.S. Customary System, used in liquid measure, equal to
4 quarts (3.785 liters)
c)a gas, liquid, or solid used to prevent contact of parts in relative motion, and
thereby reduce friction and wear
d) no correct variant

21.Find the meaning of the term “gallon”:
a) a unit of volume in the U.S. Customary System, used in liquid measure, equal to
4 quarts (3.785 liters)
b) a gas, liquid, or solid used to prevent contact of parts in relative motion, and
thereby reduce friction and wear
c) a unit of capacity used in the oil and other industries, normally equal to 42 US
gallons or 35 Imperial gallons
d) no correct variant

22.Find the meaning of the term “lamp oil”:
a) a yellowish oil obtained from whale blubber, formerly used in making soap and

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