Question

The coefficient of volume expansion is:

• A. equal to the coefficient of linear expansion
• B. twice the coefficient of linear expansion
• C. equal to the sum of coefficients of linear and superficial expansions
• D. twice the coefficient of areal expansion

Answer 1

Answer: (C)

equal to the sum of coefficients of linear and superficial expansions

The coefficient of superficial expansion is same as the coefficient of areal expansion.
$\alpha =$ coefficient of linear expansion.
$\beta =$coefficient of areal expansion.
$\gamma =$coefficient of volume expansion.
$\gamma =3\alpha$
$\beta =2\alpha$
$\therefore$ coefficient of volume expansion is sum of coefficient of linear and superficial expansions