# Acceptance Sampling - Mechanical Engineering (MCQ) questions and answers

1)   Which of the following statements is/are true?

1. Probability of acceptance decreases if acceptance number increases, when sampling size is kept constant
2. Indifferent quality range is the range between lot tolerance percent defective and acceptable quality level
3. Operating characteristics curve is the curve plotted between probability of acceptance and indifferent quality range

a. Only 1
b. Only 2
c. Only 3
d. All the above statements are true
 Answer  Explanation ANSWER: Only 2 Explanation: No explanation is available for this question!

2)   In a lot size of 10000, probability of acceptance is 0.483 for 0.4% defectives. The number of defectives are not replaced, assume
np' = 1.36. Calculate % average outgoing quality

a. 1.123
b. 0.1932
c. 0.789
d. None of the above
 Answer  Explanation ANSWER: 0.1932 Explanation: No explanation is available for this question!

3)   What are the factors causing sampling error?

a. method of sample selection
b. sample size
c. both a. and b.
d. none of the above
 Answer  Explanation ANSWER: both a. and b. Explanation: No explanation is available for this question!

4)   Lot Tolerance Percent Defective is also known as?

a. rejectable quality level
b. acceptance quality level
c. indifferent quality level
d. all of the above
 Answer  Explanation ANSWER: rejectable quality level Explanation: No explanation is available for this question!

5)   What is the effect of sample size on probability of acceptance?

a. sample size has no effect on probability of acceptance
b. as number of items in a sample decrease, higher is the possibility of number of defectives thereby probability of acceptance decreases
c. as number of items in a sample increase, higher is the possibility of number of defectives thereby probability of acceptance decreases
d. none of the above
 Answer  Explanation ANSWER: as number of items in a sample increase, higher is the possibility of number of defectives thereby probability of acceptance decreases Explanation: No explanation is available for this question!

6)   On operating characteristics curve, consumers risk is denoted by

a. α
b. β
c. γ
d. None of the above
 Answer  Explanation ANSWER: β Explanation: No explanation is available for this question!

7)   Maximum data handling analysis load is observed in

a. single sampling plan
b. double sampling plan
c. sequential sampling plan
d. all of the above
 Answer  Explanation ANSWER: sequential sampling plan Explanation: No explanation is available for this question!

8)   Which sampling method is used when simple random sampling method becomes inconvenient to use in large lots?

a. systematic sampling
b. stratified sampling
c. cluster sampling
d. sampling in stages
 Answer  Explanation ANSWER: stratified sampling Explanation: No explanation is available for this question!

9)   Which of the following statements is/are true for sampling inspection?

a. Acceptance sampling does not involve any risk
b. Characteristics of the entire lot can be truly specified
c. Less fatigue results in less mistakes
d. All the above statements are true
 Answer  Explanation ANSWER: Less fatigue results in less mistakes Explanation: No explanation is available for this question!

10)   What is acceptance quality level?

a. Maximum percentage of defective parts for sampling purpose are considered satisfactory as a process average
b. Minimum percentage of defective parts for sampling purpose are considered satisfactory as a process average

 Answer  Explanation ANSWER: Maximum percentage of defective parts for sampling purpose are considered satisfactory as a process average Explanation: No explanation is available for this question!