Data Management

Question 1

Sales engineering or customer service representatives provide field information into the data collection system.

Precausions necessary for field entry of data include which of the following items?

Answer 1

Editing of input data
(V - 16/20)

Question 2

The term variables can best be described in which of the following ways?

Answer 2

A quality which can assume several (more than two) values
(V - 11/12)

Question 3

Traffic within a computer system is controlled by:

Answer 3

The control unit of the central processor
(V - 19/20)

Question 4

If component life characteristics change from the time of the original reliablity data capture this means that:

Answer 4

New reliability data must be generated
(V - 2/5)

Question 5

What is the key component in continously providing a reliable product?

Answer 5

Reducing product variablity (V - 16/20)

Question 6

The amount and type of data collected is a function of, ..

Answer 6

Financial considerations (V - 16/20)

Question 7

What is meant by catastrophic failure?

Answer 7

A sudden change in the operating characteristics of an item,
resulting in complete loss of useful performance
(V - 5)

Question 8

If an electronic components reliability is known to be temperature sensitive, testing at an elevated temperature
is generally used to:

Answer 8

Reveal design or material flaws.

Question 9

A weight of 26.581 kg would indicate a measurement that is:

Answer 9

Continous and univariant (V - 13/14)

Question 10

In a corrective action system, trend anaylsis can be used for:

Answer 10

Providing input to overall problem identification
(V - 21/22 and 36/38)

Question 11

-

Answer 11

-

Question 12

Internal sources of component reliability data are:

Answer 12

Prototype and reliability growth (V - 2/5)

Question 13

Failure data collection, analysis and corrective action, is a requirement of, ..

Answer 13

Is a requirement of
MIL-STD-785
(V - 16/20)

Question 14

The color of individual M&M in several bags are counted and tabulated.

The results would be considered:

Answer 14

Discrete and multivariant
(V -12/13)

Question 15

Which failures would propably be considered a chargeable reliability failure?

Answer 15

An unverified failure
(V - 31/34)

Question 16

Which quantitative methods applies to the assessment of actual system or component reliability?

Answer 16

Evaluation of laboratory
and
acceptance test data
(V - 11/20)

Question 17

For a reliability data collection system, what is the key factor in type I censored data sets?

Answer 17

The length of the test
(V - 14)

Question 18

Which of the following is true concerning computer collection and reporting of data?

Answer 18

It is faster than manual collection and reporting (V -19)

Question 19

A data collection and reporting system should:

Answer 19

Report data on success as well as failures
(V - 16/20)

Question 20

An example of automated data collection includes:

Answer 20

Electronic chart recorders (V - 19)

Question 21

A number of engines are to be placed on the test stand in a reliability demonstration test. The test is to be terminated at the end of 168 hours (1 week). This is an example of:

Answer 21

Type I cencoring
(V - 14/15)

Question 22

Reliability data has been constant for a substantial time in a fielded unit. Suddenly, a number of unusual failures have occured.

You suspect..

Answer 22

Manufacturing defects
(V - 4/5)

Question 23

A part must be purchased for a private airplane. Since the part is worth 500$, there is a warranty period provided. The warranty reads, in part, as follows:

Return the part for a refund within 45 days of use ; this warranty
applies only to the original buyer ; send 45$ for labor and shipping ; if the part is unrepairable it will be returned to the customer ;The purchaser must show proof that maintenance was performed regulary using ggs dw 20 lubrican.

After reading the warranty, what may be concluded?

Answer 23

This is not a valid limited or full warranty (V - 7/8)

Question 24

Field failure data contains many examples of failures caused by misuse by the operators.

In the reliability calculations, one should ..

Answer 24

Use this data
(V - 2/5)

Question 25

The prediction technique has not allways been effective quantitatively. There is often a wide difference between actual. However reliability prediction technique permits:

Answer 25

Seperating out “the vital few” from the “trivial many”
(V -27)

Question 26

A failure which prevents the system from performing its mission would be classified as:

Answer 26

A critical failure
(V - 34)

Question 27

If units are put on test and time to fail data is collected for only a three month period, the data is:

Answer 27

Single censored (V - 14/15)

Question 28

Which information is needed on a realibility test report?

Answer 28

Test location,
specification and
failure description
(V - 11/15)

Question 29

Relevant failures include which of the following?

Answer 29

Unverified failures
(V - 34)

Question 30

A number of trials are conducted in which only the effect of car weight on fuel efficiency is considered. The outcome of this experiment is most likely to be:

Answer 30

Coninous and unvariant data (V - 13)

Question 31

Which of the following techniques is most beneficial in tracking a process to determine wether corrective action should be taken?

Answer 31

Control charting (IV - 63/77 and V 21/22 and 27)

Question 32

A key element of the protorype process is

Answer 32

Customer evaluation an feedback (V - 9/10)

Question 33

It would be unnecessary for the failure data collection, analysis and corrective action system to include:

Answer 33

All reliability data sources (V - 28/34)

Question 34

Reliability data is rarely complete. 50 units are placed on test for 50 hours. During the test several units fail. The remining units are removed from testing at that point. Which of the following types of censoring has occured?

Answer 34

Time censoring (V - 14)

Question 35

Which of the following is a failure analysis tool?

Answer 35

Atomic force microscopy (V - 30)

Question 36

A weight of 26.581 kg would indicate a measurement that is:

Answer 36

Continous and unvariant (V - 13/14)

Question 37

Which technique is most beneficial in traking a process to determine whether corrective action should take place

Answer 37

Control charting (IV - 63/77 and V 21/22 and 27)

Question 38

When considering a lawsuit for financial loss or physical harm, the most likely defendant is often:

Answer 38

Large companies with deep pockets (VI-24)

Question 39

When human factors in reliability are considered, what is the fundamental concept?

Answer 39

The method a human uses the device may affect the reliability (VI-11/12)

Question 40

Which of the following test are always performed on production items?

Answer 40

Screening / 100% Tests (VI-6)

Question 41

Reliability engineers sometimes prefer to test the reliability of components with CERT (Combined Environmental Reliability Testing).

This is because, ..

Answer 41

Combined environments are more realistic and may show different failure modes than single environments.