Test Content

page $13of22$

Question $13$

$R$ chart may show a jump in level when $-$

$($a$)$ tool gradually wears

$($b$)$ the operator in charge of the process is changed to a new inexperienced operator

$($c$)$ the skill of the operator in charge of the

$($d$)$ all of the above

$($E$)($e$)$ only $($a$)$ and $($b$)$