Specific gravity is the ratio between the mass of a volume of oil, and is generally measured with a __________.
a. dead weight tester
b. thermometer
c. hydrometer
d. density meter
Answer: C
Specific gravity is the ratio between the mass of a volume of oil, and is generally measured with a __________.
a. dead weight tester
b. thermometer
c. hydrometer
d. density meter