Quality Question Bank
for Exam preparation

Q2. The thickness of the blade of a fan is specified to lie between 4 cm and 6 cm. The length of the blades must lie between 10 cm and 20 cm. A fan blade randomly selected from a sample of 100 blades has a thickness of 5cm and a length of 21cm. The number of defect(s) the blade has is ______________.

1. One
2. Two
3. There is no defect
4. Three

Q3. Which of the following is the correct combination of specifications while designing a control chart?

1. Sample size, Process mean, specification limit
2. Sample size, Frequency of sampling, specification limit
3. Sample size, Frequency of sampling, Number of defects
4. Sample size, Specification limit, process standard deviation

Q4. The concept of rational sub group means that subgroups or samples be selected such that if assignable causes are present the chances for differences between subgroups will be ______________.

1. minimized
2. maximized
3. neutralized
4. optimized

Q5. What is the purpose of a simple linear regression?

1. To predict scores on a dependent variable from scores on a single independent variable
2. To predict scores on an independent variable from scores on a single dependent variable
3. To predict scores on an independent variable from scores on multiple dependent variables
4. To predict scores on a dependent variable from scores on multiple independent variables

Q6. While random variability in a system can be removed by ______________, non-random variability requires ______________.

1. Operator or management action, Improvement in the system
2. Improvement in the system, operator or management action
3. Statistical Quality Control, Quality Checks
4. None of the above

Q7. What does the Adjusted R squared value tells us?

1. The Adjusted R squared value tells us how much of the variance in the dependent variable can be accounted for by the independent variable
2. The Adjusted R squared value tells us if there is a positive relationship
3. The Adjusted R squared value tells us if there is a significant difference
4. The Adjusted R squared value tells us if there is a significant relationship

Q8. An acceptance control chart has limits that are based on the specification limits for the product rather than limits which differentiate between random and assignable causes. Under which if the following circumstance should a QC manager consider using an acceptance control chart?

1. When the engineering tolerance on a dimension greatly exceeds the natural dispersion of the manufacturing process
2. When the number of samples outside the current control chart limits become too costly and cumbersome to investigate
3. When a process is subject to constant but stable tool wear
4. A and B
5. A and C

Q9. Presence of ______________ after every stage of DMAIC allows for review of project and incorporation of suggestions.

1. Review gate
2. Toll gate
3. Decision gate
4. None of the above

Q10. Which of the following is not a type of attribute chart?

1. P chart
2. C chart
3. U char
4. X bar chart