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 coefficient of linear and superficial expansions
• D. Twice the coefficient of areal expansion

Answer 1

Answer: (C)

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.
$<br/>\begin{array}{l}<br/>\gamma =3\alpha \\ <br/>\beta =2\alpha <br/>\end{array}<br/>$
$\therefore$ coefficient of volume expansion is sum of coefficient of linear and superficial expansions