1 All of the following statements about control charts are true except:

　　A Control charts can be used to establish as well as maintain process control

　　B control charts are used to detemine acceptance limits when no limits are stipulated by the product specification; otherwise, one should use the limits dictated by the specification.

　　C all data points outside the control chart limits are variations explained by assignable causes.

　　D A and B.

　　E B and C

　　ans:E

　　2 A quality control manager decides to increase his daily sample size from three to six. The size of the control band will:

　　A increase

　　B decrease

　　C remain unchanged

　　D not determinable from given data

　　E None of the above.

　　ans:B

　　3 All of the following statements about acceptance sampling are true except:

　　A Acceptance sampling plans are beneficial when the cost of inspection is high and the resulting loss of passing nonconforming units is not great.

　　B Acceptance sampling plans are necessary when destructive inspections are required.

　　C Acceptance sampling plans are never effective at rejecting nonconforming units as 100 percent inspection, even when the inspection process is very tedious.

　　D Acceptance sampling plans do not directly control the quality of a series of lots; they instead specify the risk of accepting lots of given quality.

　　E Acceptance sampling plans are not very effective for inspecting small lots of custom-made products.

　　ans:C

　　4 In acceptance sampling, if the sample size is kept the same but the acceptance number is increased, which of the following will be true:

　　A buyer's risk will decrease

　　B vendor's risk will decrease

　　C producer's risk will decrease

　　D consumer's risk will increase

　　E C and D only

　　ans:E

　　5 The risk of accepting a lot of poor quality, in acceptance sampling, is referred to as:

　　A buyer's risk

　　B consumer's risk

　　C producer's risk

　　D type I error

　　E B and D only

　　ans:B

　　6 Standard “Shewhart” control charts assume that the distribution of sample means is:

　　A uniform

　　B normal

　　C discrete

　　D symmetrical

　　E B and D only

　　ans:E

　　7 The specification for a particular part is 10“ + or - 0.015”. The standard associated process produces parts with a means of 10“ and standard deviation of 0.002'. The process capability index is:

　　A 0.002

　　B 1

　　C 2.5

　　D 7.5

　　E None of the above

　　ans:C

　　8 Random cause or system variation is:

　　A generally present in every process

　　B the responsibility of the inspection of the process

　　C the responsibility of the workers of the process

　　D the responsibility of management

　　E A and D only

　　ans:E

　　9 The centerline of a standard ”Shewhart' control chart represents:

　　A the process target

　　B the nominal dimension specified by the customer

　　C the nominal dimension specified by the designer

　　D the true process average or mean

　　E the process sample average or mean

　　ans:E

　　10 100 % inspection of output is:

　　A the best proven method to ensure quality

　　B is expensive, ineffective approach to quality management

　　C can never be, justified

　　D can still leave some defects undetected

　　E B and D only

　　ans:E

　　11 Quality control charts show a characteristic of the product or service against:

　　A the specification limits

　　B customer requirements

　　C control limits based on three standard deviations in each direction

　　D control limits based on six standard deviations in each direction

　　E A and D only

　　ans:C

　　12 Variables quality data are:

　　A quantitative or qualitative data

　　B quality data for which the product or service is designed and built

　　C reflect measurements on a continuous scale of a characteristic of the produce or service.

　　D Indicate management's understanding of the concept of variability

　　E B and C only

　　ans:E

　　13 Attributes quality data are:

　　A quantitative or qualitative data

　　B quality data for which the products or services is designed and built.

　　C reflect measurements on a continuous scale of a characteristic of the product or service

　　D indicate management's understanding of the concept of variability

　　E A and B only

　　ans:E

　　14 Which of the following are among Phil Crosby's “absolutes of quality'.

　　A the performance of standard is zero defects

　　B do everything right the first time, each time

　　C constantly improve each product and each service

　　D the measurement system is the cost of nonconformance

　　E A and D only

　　ans:E

　　15 Cost of quality includes:

　　A Appraisal cost

　　B detection cost

　　C prevention cost

　　D maintenance cost

　　E A, B, and C only

　　ans:E

　　16 The five major cost categories of quality are _____ .

　　A prevention, appraisal, internal failures, external failures, and equipment （measurement and test）。

　　B specifications, QA programs, QC programs, parts rejected and parts returned

　　C Staffing, Training, reviews, equipment and rejected goods

　　D sampling, design considerations, manufacturing considerations, training and rework.

　　E None of the above

　　ans:A

　　17 Satisfaction of the functional requirements of a product is called _____ .

　　A usability

　　B reliability

　　C maintainability

　　D producibility

　　E All of the above.

　　ans:E

　　18 Inspection processes are considered _____.

　　A an investment in the future

　　B an effective corrective process

　　C a necessary control process

　　D insults to production line employees

　　E None of the above.

　　ans:C

　　19 Warranty cost is an example of an _____ .

　　A internal failure cost

　　B appraisal cost

　　C external failure cost

　　D customer satisfaction cost

　　E All of the above.

　　ans:C

　　20 Which of the following is not a cost of non-conformance?

　　A maintenance and calibration

　　B warranty repairs

　　C scrap

　　D rework

　　E All of the above.

　　ans:A