Free CQT sample questions

Correct answer: Appraisal cost

Appraisal costs are expenses incurred to determine the degree of conformance to quality requirements. Since the laser inspection system is actively measuring and evaluating the stamped parts to ensure they meet specifications before shipment, its associated costs fall under appraisal. Prevention costs are incurred to keep defects from happening in the first place (e.g., training, quality planning). Internal failure costs occur when defects are found before reaching the customer (e.g., scrap, rework), and external failure costs occur after the customer receives a defective product.

Correct answer: D6 (Implement and Validate Permanent Corrective Actions); Set in Order

The installation of the shadow board is the actual execution of the solution that permanently eliminates the root cause, which aligns with D6 (Implement and Validate Permanent Corrective Actions) in the 8D methodology. In the 5S Lean framework, a shadow board is a classic example of 'Set in Order' (Seiton), which focuses on organizing necessary items so they are easy to find, use, and return to their proper locations. D3 involves temporary containment (like 100% sorting), and D5 is the selection/development phase before implementation. flowchart TD A[Root Cause Identified: Tools on Engine Blocks] --> B[D5: Develop Solution] B --> C[Design Shadow Board] C --> D[D6: Implement Permanent Action] D --> E[Install Shadow Board] E --> F[5S Principle: Set in Order]

Correct answers: Control Chart; Cause and Effect Diagram

A Control Chart is the only basic quality tool specifically designed to distinguish between common cause (inherent) variation and special cause (assignable) variation over time by plotting data against calculated statistical control limits.

The Cause and Effect Diagram (Ishikawa or Fishbone diagram) is the ideal tool for brainstorming and categorizing potential root causes (such as Man, Machine, Material, Method, Measurement, and Mother Nature) of a specific problem or effect.

Correct answer: 95.44%

The target range is 14.90 mm to 15.10 mm. The mean is 15.00 mm. The distance from the mean to either boundary is 0.10 mm. Since the standard deviation is 0.05 mm, this range represents exactly ±2 standard deviations from the mean (0.10 / 0.05 = 2). According to the empirical rule (68-95-99.7 rule) for a normal distribution, approximately 95.44% of the data falls within ±2 standard deviations of the mean.