ASQ ASQ Certified Quality Engineer (CQE)

Question 1

In statistical process control (SPC), what does 'common cause variation' refer to?

Accepted Answer

Inherent, natural variation in a process

Answer

Variation due to special assignable causes

Answer

Variation caused by equipment malfunction

Answer

Variation due to operator error

Question 2

Which control chart is used to monitor the proportion of defective items in a sample?

Accepted Answer

p chart

Answer

X-bar chart

Answer

R chart

Answer

c chart

Question 3

What is the primary purpose of a Pareto chart in quality management?

Accepted Answer

To identify and prioritize the most significant causes of problems

Answer

To show the relationship between two variables

Answer

To display process variation over time

Answer

To compare a distribution to a normal curve

Question 4

In a normal distribution, approximately what percentage of data falls within ±2 standard deviations of the mean?

Accepted Answer

95.4%

Answer

68.3%

Answer

99.7%

Answer

90.0%

Question 5

What does the process capability index Cpk measure?

Accepted Answer

How well a process meets specifications considering both spread and centering

Answer

The ratio of process spread to specification spread only

Answer

The number of defects per million opportunities

Answer

The variation between subgroup averages

Question 6

Which sampling plan standard is most commonly referenced for attribute acceptance sampling in the U.S.?

Accepted Answer

ANSI/ASQ Z1.4

Answer

MIL-STD-1916

Answer

ISO 9001

Answer

ASTM E11

Question 7

What is the null hypothesis (H₀) in statistical hypothesis testing?

Accepted Answer

The hypothesis that assumes no difference or effect exists

Answer

The hypothesis that states there is a significant difference

Answer

The alternative hypothesis being evaluated

Answer

The hypothesis with the highest probability of being true