Which of the following list of basic NDT techniques are X ray types?

The weight of paint cans is considered

Given that the population standard deviation is 6.8, what sample size is required to be 90% confident that the estimated mean has an error less than 0.02?

Consider the following statement:
"A defect which might affect the appearance or general function of essential parts" This definition describes a seriousness classification described as

Which of the following are likely to be positive actions in obtaining a supplier's commitment to quality improvement?
. Involving the supplier early in the product development stage. . Partially reimbursing the supplier, when the product is rejected. . Establishing a firm schedule of required product quantities and dates. . Providing meaningful and timely quality performance feedback.