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. 来源：考试大
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 来源:我考网网
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 来源：www.examda.com
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

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