Problems with Solutions

$1.$ An oil has an API of $24$ degrees. What is its specific gravity?

$2.$ An oil has a specific gravity at $60/60$ F of $0\mathrm{.}7839.$ What is its API gravity?

$3.$ Determine the degrees API and Baume of an oil having a specific gravity at $60/60$ F of $0\mathrm{.}7238.$

$4.$ Suggest other simple methods that may be used to measure specific gravity.

$5.$ What is the factor for the conversion from the poises to $($a$)$ the pounds$-$force$-$second$-$foot system, and $($b$)$ the slugs$-$mass$-$foot$-$second system?

$6.$ According to the PSME code, what are SAE numbers?

$7.$ According to the PSME code, what is a viscosity index?