Reliablity Planning

Question 1

An ideal reliability test programm discovers, ..

Answer 1

Discovers every failure mode (VI - 2/3)

Question 2

For continual improvement in product reliability which of the following tests is most desirable?

Answer 2

Development tests. (VI - 7/8)

Question 3

In specially designed test environments, devices can be analyced against more than one environmental condition. This type of reliability testing is known as:

Answer 3

Combined environmental reliability testing (VI - 29/30)

Question 4

A majority of product quality problems is said to be the result of:

Answer 4

Design (VI - 20)

Question 5

There are various categroies of reliability testing. A test of device to verify that it is acceptable for its intended function would be classified as:

Answer 5

Qualification test (VI - 6/7)

Question 6

In product liability, the proper legal term for statements regarding the reliability of a product are known as:

Answer 6

Representation (IV - 27/28)

Question 7

An excellent reference for establishing a reliability test program would be found in:

Answer 7

MIL-HDBK-781 (VI - 29)

Question 8

A reliability engineer can recommend that various tests be performed on a new part. Which of the following would be a direct result of those tests?

Answer 8

Knowledge of whether the part meets requirements (VI 2/3)

Question 9

The legal department would like the team`s expertise in minimizing warranty problems. The best first course of action would be to:

Answer 9

Review the existing warranty data collection process for imporvements

Question 10

According to ISO 9000 which step tests the product to ensure it meets its intended use?

Answer 10

Validation (VI - 21)

Question 11

If one were to review a reliability development program, whose alpha in the duane model is reported to be 0.7 they would conclude:

Answer 11

The Duane Model is being used improperly (VI - 13/17)

Question 12

Under which of the following legal descriptions can your company`s records be obtained?

Answer 12

Discovery (VI - 27/28)

Question 13

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

Answer 13

The method a human uses the device may affect the reliability

Question 14

The initial qualification test for a part generated 5 failures in 3000 hours. The goal is for a MTBF of at least 2000 hours in service. If the alpha value is 0.4 how much total testing is required?

Answer 14

Duan Model Calculation is required (VI - 14/15 ; 17000 hours )

Question 15

Consideration of combined environmental reliability testing should inlcude which of the following factors:

Answer 15

Vibration testing (VI -29/31)

Question 16

One strategy for dealing with product liability is:

Answer 16

Selecting a product liability insurance policy (VI - 24 and 26)

Question 17

For continual improvement in product reliability which of the following tests is most desirable?

Answer 17

Development tests (VI - 7/8 and 14/15)

Question 18

According to ISO 9000 which step tests the product to ensure it meets its intended use?

Answer 18

Validation (VI - 21)

Question 19

TAAF is best performed at which stage of the product life-cycle

Answer 19

Desing/Development (VI - 13)

Question 20

A reliability test of 20 components was run with the test plan to stop the test when 10 failures were observed. The MTTF determined is determined by:

Answer 20

The total accumulated time divided by 10, but with confidence intervals calculated (VI - 29/31)

Question 21

When designing mechanical parts, in order to decrease risk of failure to overloading conditions:

Answer 21

Radii at connecting parts should be as large as possible (VI - 27)

Question 22

One of the uses of the Duane model is to:

Answer 22

Predict the expected growth of MTBF (VI - 13/17)

Question 23

For continual improvement in product reliability which of the following tests is most desirable?

Answer 23

Development Test

Question 24

A reliability test of 20 components was run with the test plan to stop the test when 10 failures were observed. The MTTF determined is determined by:

Answer 24

The total accumulated time divided by 10, but with confidence intervals calculated.

Question 25

One of the main reasons for conducting reliability testing is:

Answer 25

To monitor reliability growth over time

Question 26

When performing an acceptance test on one shot devices, which test method can provide reliability information at given level of confidence?

Answer 26

Failure free testing

Question 27

Products should be subjected to tests which are designed to:

Answer 27

Approximate the conditions to be experienced in customer`s application

Question 28

A mature design is one that has been evaluated and verified to meet requirements. What is the most effective method to obtain reliability growth and design maturity?

Answer 28

Via a structured test, analyze and fix program

Question 29

Which of the following test conditions is normally a direct, instead of a combined environmental reliability testing technique?

Answer 29

Hardness Cycling

=> Stress, temperature and vibration cycling test data is routinely collected in a combined environmental testing. Hardness is normally a direct measurement.

Question 30

For continual improvement in product reliability which of the following tests is most desirable?

Answer 30

Development tests.

=> Development tests, like reliability growth testing and test, analyze and fix testing, will continually improve reliability.

Question 31

There are a variety of reasons for reliability testing. Among them are to induce failure modes, to determine if reliability requirements have been met or to determine safety margins. The responsibility for reliability testing is placed on:

Answer 31

Supplier and customers jointly

Question 32

Failure modes, can vary dramatically due to …

Answer 32

changes in use applications

Question 33

In the classification of defectives, such as DOD-STD-2101,

if an item will produce a significant degradation in performance, the classification would be …

Answer 33

Major