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[Apr-2022] Feel ASQ CRE Dumps PDF Will likely be The best Option

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NO.136 In 4 flips of a coin the probability of two heads and two tails (in any order) is:
Response:

9/16

7/16

1/2

3/8

NO.137 In general, reliability testing is performed for which of the following reasons?
I. To detect unanticipated failure modes.
II. To compare estimated failure rates to actual failure rates.
III. To monitor reliability growth over time.
IV. To meet or exceed customer expectations.
Response:

I and III only

II and IV only

I, II and III only

I, II, III and IV

NO.138 A company has produced a new module. The failure data on 40 returns are shown below.

If the time to failure follows a normal distribution, what is the probability that time to failure exceeds 20 hours ?
Response:

0.028

0.050

0.950

0.972

NO.139 The optimum cost point for total life cycle costs occurs:
Response:

When operations and maintenance costs are minimized.

When reliability program expenditures are maximized.

When acquisition costs plus ongoing costs are minimized.

When manufacturing and development costs are minimized.

NO.140 Which of the following action will help eliminate the effects of extraneous factors in a designed experiment?
Response:

Randomizing the experiment.

Selecting factor levels.

Fractionating the experiment.

Repeating the experiment under different conditions.

NO.141 In the bath curve model, which one of the sections represents the period when catastrophic failure are likely to occur?
Response:

Infant mortality

Constant failure rate period.

Wear out period.

All periods.

NO.142 The investment in automated test equipment is often justified under which of the following circumstances Response:

Numerous tests must be performed.

Repair times must be short.

Conformance records are required.

Traceable records are required.

NO.143 What is this system’s reliability at 700 hours?
Component failure data is : – Failure rate of A = 0.0007 failures/hr – Reliability of B = 0.92 – MTTF of C =
1400 hours – Reliability of D = 0.85.

Response:

0.986

0.998

0.994

0.952

NO.144 In order to attain a high order of series reliability:
Response:

The number of parts must be kept to a minimum.

The number of parts must be increased.

The number of parts must have a low failure variance.

The number of parts is insignificant if each part has a reliability of 99 percent of more.

NO.145 When assessing failures during a reliability test program, which of the following should a reliability engineer consider first?
Response:

The capability of test equipment

The hazard rate is constant

The hazard rate is decreasing.

The hazard rate is increasing.

NO.146 Which of the following techniques is NOT used when derating parts to enhance their overall reliability?
Response:

Derating for temperature.

Derating for stress.

Use of 100% rating.

Lower power dissipation.

NO.147 Failure occur on a system at 75, 79, 83, 85 hours. Assuming normality, one sided and unbiased the lower tolerance limit for 95% reliability with 90% confidence for this sample is:
Response:

96 hours.

60 hours.

100 hours.

63 hours.

NO.148 Laboratory tests of a new polymer prototype yielded the following proportions of a critical compound:
4.2 ppm, 4.1 ppm, 4.7 ppm, 4.9 ppm, 5.3 ppm
What is the sample standard deviation?
Response:

0.498

0.464

0.475

0.445

NO.149 When failed field item are returned for failure investigation, which of the following steps should be taken first?
Response:

The physics of failure should be used to determine failure mechanism.

Each item should be investigated to classify and completely determine the failure mode

Each item’s predicted reliability should be compared with its actual reliability.

The manufacturing process should be reviewed to ensure that it was followed during the production of the failed items.

NO.150 A system is turned off every 30 days for 5 minutes for on line maintenance. If the probability of system failure due to hardware failure is negligible, what is the system’s unavailability?
Response:

1.157 × 10 -4

3.472 × 10 -4

0.0333

0.999

NO.151 Fifteen(15) motors were tested for a total of 1,200 cumulative hours, with four failure occuring. The test was then failure-truncated. If the failure rate is assumed to be constant, what is the 95% lower confidence limit of MTBF?
Response:

131 hours.

155 hours.

609 hours

876 hours.

NO.152 Which of the following is NOT an appropriate element in the definition of availability?
Response:

The degree to which the system is in an operable and committable state at the start of a mission.

The probability the system will perform its mission when required.

The ratio of the actual operating time to the scheduled operating time excluding PM.

The measure of the ability of a system to achieve mission objectives given the conditions during the mission.

NO.153 All of the following statements concerning statistical inference are true EXCEPT:
Response:

The confidence interval is a range of values which may include the true value of a population parameter.

The confidence interval is normally the statistical tolerance limits of the population parameter.

The point estimate is a single value used to estimate the population parameter.

Estimation is the process of analyzing a sample result in order to predict the value of the population parameter

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[Apr-2022] Feel ASQ CRE Dumps PDF Will likely be The best Option [Q136-Q153]