A liquid has density 93.6 lb/ft^3; what is its SG relative to water?

A liquid has density 93.6 lb/ft^3; what is its SG relative to water?

• A. 1.40
• B. 1.50
• C. 1.60
• D. 1.45

Answer: (B)

Specific gravity compares how dense a liquid is to water. It’s found by dividing the liquid’s density by water’s density at the same conditions. In English engineering units, water is typically taken as 62.4 lb/ft^3. So the SG is 93.6 divided by 62.4, which equals 1.5. Therefore, the liquid’s SG is 1.50, meaning it is one and a half times as dense as water (and would sink if placed in water).

Specific gravity compares how dense a liquid is to water. It’s found by dividing the liquid’s density by water’s density at the same conditions. In English engineering units, water is typically taken as 62.4 lb/ft^3. So the SG is 93.6 divided by 62.4, which equals 1.5. Therefore, the liquid’s SG is 1.50, meaning it is one and a half times as dense as water (and would sink if placed in water).