4. For different probability distributions often used for statistical quality control, A) Normal distribution can be used to approximate Poisson distribution B) Normal distribution should not be used to approximate Binomial distribution in any case C) A process described by Exponential distribution can also be described by Poisson distribution D) Binomial distribution is often used to approximate Hypergeometric distribution E) Normal distribution should be considered if the process is a combination of numerous processes

5. Considering OC curves used for different acceptance sampling plans A) Type A OC curves should always be used since they are accurate B) Type A OC curves can only be used when lot sizes and sample sizes are similar C) Type B OC curves should be used when lot sizes are much larger than sample sizes D) Type B OC curves should be used when lot sizes are slightly larger than sample sizes E) Type B OC curves should be used when lot sizes are proportional to sample sizes

6. Assume that 1 is acceptable quality level (AQL), 2 is lot tolerance percent defective (LTPD), is producers risk, is consumers risk, N is the lot size. To determine the sample size n and the acceptance number c of a single sampling plan using a Binomial nomograph, the following specific values of parameters are used: A) (1, 1 ) and N B) (2, ) and N C) (1, 1 ) and (2, ) D) (1, 1 ), (2, ) and N E) (1, 2) and N

7. Military standard 105E (ANSI/ASQC Z1.4, ISO 2859) sampling procedures for inspection by attributes A) are based on lot tolerance percent defective (LTPD) B) are based on acceptable quality level (AQL) C) are indexed on average outgoing quality limit (AOQL) D) are based on acceptable quality level (AOQL) and lot tolerance percent defective (LTPD) E) were developed originally for mass production

8. In reliability analysis, a system is composed of 3 identical components with 2 out of the 3 units redundant for backup purpose. Let be the system reliability and be the component reliability. Then: A) = 3 B) = 1 3 C) = = 3 D) = 1 3 E) = 1 (1 )3

9. In reliability analysis, a series system is composed of 3 identical components and the system will fail if any one of the 3 components fails. Let be the system failure rate and be the component failure rate. Then: A) = = 3 B) = 3 C) = 1 3 D) = 1 3 E) = 1 (1 )3

4. For different probability distributions often used for statistical quality control, A) Normal distribution can be used to approximate Poisson distribution B) Normal distribution should not be used to approximate Binomial distribution in any case C) A process described by Exponential distribution can also be described by Poisson distribution D) Binomial distribution is often used to approximate Hypergeometric distribution E) Normal distribution should be considered if the process is a combination of numerous processes 5. Considering OC curves used for different acceptance sampling plans A) Type A OC curves should always be used since they are accurate B) Type A OC curves can only be used when lot sizes and sample sizes are similar C) Type B OC curves should be used when lot sizes are much larger than sample sizes D) Type B OC curves should be used when lot sizes are slightly larger than sample sizes E) Type B OC curves should be used when lot sizes are proportional to sample sizes 6. Assume that p, is acceptable quality level (AQL), P2 is lot tolerance percent defective (LTPD), a is producer's risk, B is consumer's risk, N is the lot size. To determine the sample size n and the acceptance number c of a single sampling plan using a Binomial nomograph, the following specific values of parameters are used: A) (P1, 1 - a) and N B) (P2, B) and N C) (P1,1 - a) and (P2, B) D) (P1,1 - a), (P2,B) and N E) (P1, P2) and N 7. Military standard 105E (ANSI/ASQC 21.4, ISO 2859) sampling procedures for inspection by attributes A) are based on lot tolerance percent defective (LTPD) B) are based on acceptable quality level (AQL) C) are indexed on average outgoing quality limit (AOQL) D) are based on acceptable quality level (AOQL) and lot tolerance percent defective (LTPD) E) were developed originally for mass production 8. In reliability analysis, a system is composed of 3 identical components with 2 out of the 3 units redundant for backup purpose. Let R, be the system reliability and Rc be the component reliability. Then: A) R = 3 X RC B) Rs = x RC C) R = Rex Rex Re = R3 D) Rs = 1 - R2 E) Rs = 1- (1 - R.)3 9. In reliability analysis, a series system is composed of 3 identical components and the system will fail if any one of the 3 components fails. Let is be the system failure rate and ic be the component failure rate. Then: A) is = 1cxlxlc = 13 B) is = 3x1c C) = x D) is = 1-22 E) is = 1 - (1 - 1)3