ASQ Quality Engineer CQE Exam Practice Test

Answer : D

The diagram shown is typical of an interaction plot used in the analysis of designed experiments.

Confounded:

Confounding occurs when the effects of two factors cannot be separated. The diagram does not indicate this.

Replicated:

Replication refers to repeating the experiment or conditions multiple times to ensure reliability, not depicted here.

Show Randomization:

Randomization refers to the random assignment of treatments to experimental units. The plot does not indicate this.

Show Interaction:

Interaction occurs when the effect of one factor depends on the level of another factor.

The crossing lines in the plot indicate that the response to Factor A changes depending on the level of Factor B, demonstrating an interaction between the two factors.

Answer : B

Given that components 1, 2, and 3 each have reliabilities of 0.95, and assuming the system configuration as depicted in the image (series-parallel configuration):

Reliability of the parallel components (2 and 3): Rparallel=1[(1R2)(1R3)]R_{\text{parallel}} = 1 - [(1 - R_2) \times (1 - R_3)]Rparallel=1[(1R2)(1R3)] Rparallel=1[(10.95)(10.95)]R_{\text{parallel}} = 1 - [(1 - 0.95) \times (1 - 0.95)]Rparallel=1[(10.95)(10.95)] Rparallel=1[0.050.05]R_{\text{parallel}} = 1 - [0.05 \times 0.05]Rparallel=1[0.050.05] Rparallel=10.0025R_{\text{parallel}} = 1 - 0.0025Rparallel=10.0025 Rparallel=0.9975R_{\text{parallel}} = 0.9975Rparallel=0.9975

Reliability of the entire system (series of component 1 and the parallel system): Rsystem=R1RparallelR_{\text{system}} = R_1 \times R_{\text{parallel}}Rsystem=R1Rparallel Rsystem=0.950.9975R_{\text{system}} = 0.95 \times 0.9975Rsystem=0.950.9975 Rsystem=0.947625R_{\text{system}} = 0.947625Rsystem=0.947625

Rounded to three decimal places, the system reliability is 0.948.

Reliability engineering principles for series and parallel systems calculations.

Answer : B

Accelerated aging involves subjecting a product to elevated stress conditions (like temperature, humidity) to simulate the aging process.

Analyzing:

Involves reviewing data or conditions but not actively subjecting the product to stress.

Testing:

Involves actively evaluating the product under specific conditions to observe its performance.

Accelerated aging fits under testing because it involves placing the product under controlled stress conditions to observe its behavior over time.

Demonstrating:

Generally used to show functionality but does not specifically involve stress conditions.

Inspecting:

Involves looking at the product for defects or quality, not necessarily under accelerated conditions.

Answer : A

Answer : D

Answer : A

The chart provided is a control chart used to monitor process variation over time.

Control charts have upper control limits (UCL) and lower control limits (LCL) that represent the threshold of acceptable variation.

Points X and Y, which lie outside the control limits, indicate special causes of variation. These are deviations caused by specific, identifiable factors rather than inherent process noise.

Region Z, where data points are consistently below the mean and approaching the LCL, suggests a trend indicating a shift due to special causes.

Reference: According to ISO 9001 and the ASQ, control charts are utilized to detect special causes of variation, which signal that a process is out of control and requires investigation.

Answer : C

Destructive test methods are those that cause damage or permanent alteration to the specimen being tested.

Radiography:

Non-destructive method using X-rays or gamma rays to view the internal structure.

Acoustic Emission:

Non-destructive technique detecting transient elastic waves produced by a sudden redistribution of stress.

Corrosion:

Destructive process where materials are degraded due to chemical reactions with their environment.

Magnetic Particle:

Non-destructive method using magnetic fields to detect surface and near-surface discontinuities.

Corrosion testing inherently destroys or alters the material being tested, categorizing it as a destructive method.