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NEW QUESTION 132
As a result of improper machining, a gear-tooth in a vehicle's transmission breaks causing the transmission to lock up and the vehicle to crash, injuring the driver. The failure mode in this case should be identified by the reliability engineer as the Response:
- A. Jammed transmission.
- B. Vehicle crash.
- C. Improper machining.
- D. Injured driver.
Answer: A
NEW QUESTION 133
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:
- A. 0.475
- B. 0.498
- C. 0.445
- D. 0.464
Answer: B
NEW QUESTION 134
An aggregate preventive maintenance program can greatly increase the overall availability of a system because of the Response:
- A. Ability to improve product safety.
- B. Ability to improve observed reliability.
- C. Emphasis on budgeting operational expenses.
- D. Improved control of inventory levels.
Answer: B
NEW QUESTION 135
Which of the following statements is TRUE about human factor points?
Response:
- A. They generally cause schedule slippage whenever they are incorporated.
- B. They are most costly to incorporate during the concept phase.
- C. They should be incorporated during the design phase.
- D. They are not necessary until the product has been designed and field tested.
Answer: C
NEW QUESTION 136
In general, one should select the highest component parameter ratings feasible so that:
I. Failure rates may be minimized.
II. Probability of secondary failure is minimized.
III. Safety margins are offered against unforeseen transients.
Response:
- A. I and III only
- B. I and II only
- C. I only
- D. I, II and III
Answer: D
NEW QUESTION 137
In order to sustain a high system reliability in the field, it is BEST to:
Response:
- A. Lubricate the equipment exactly to manufacturing specifications.
- B. Write detailed reports on major failure modes.
- C. Follow a preventive maintenance program with scheduled diagnostic checks.
- D. Fully analyze all failed components
Answer: C
NEW QUESTION 138
A resistor is rated at 1 watt. One example of using this resistor in a derated condition is using:
Response:
- A. The resistor in a 2 watt application.
- B. Two of the resistors in series.
- C. The resistor in a 0.5 watt application.
- D. The resistor as a standby unit.
Answer: C
NEW QUESTION 139
The reliability growth factor is MOST important to consider in which of the following situation?
Response:
- A. Option A
- B. Option D
- C. Option B
- D. Option C
Answer: B
NEW QUESTION 140
An engineer must design a product with a probability of success 99%. Assume that both the strength and stress are normally distributed and that the standard deviations are the same.
If the stress is known to be 3000 lbs with a standard deviation of 100 lbs, what must be the approximate designed strength?
Response:
- A. 4020 lbs.
- B. 3330 lbs.
- C. 3100 lbs.
- D. 3730 lbs.
Answer: B
NEW QUESTION 141
System-safety analytical techniques include all EXCEPT:
Response:
- A. Fault tree analyses.
- B. Design readiness reviews.
- C. Hazard analyses.
- D. Logic diagram analysis.
Answer: B
NEW QUESTION 142
For complex electronics systems, the major contributor to repair time is generally:
Response:
- A. Remove/replace.
- B. Disassembly/reassembly.
- C. Diagnosis.
- D. Final checkout.
Answer: C
NEW QUESTION 143
The use of plug-in devices improves all of the following EXCEPT:
Response:
- A. Interchangeability
- B. Design reliability.
- C. Mean time to repair.
- D. Fault isolation time.
Answer: B
NEW QUESTION 144
Derating a component to 50 percent of its operating value will generally decrease its failure rate by a factor of:
Response:
- A. Less than 10 percent.
- B. Greater than 10 percent but less than 30 percent.
- C. Greater than 50 percent.
- D. Greater than 30 percent.
Answer: D
NEW QUESTION 145
In the Taguchi design methodology, what are noise factors?
Response:
- A. Factors that influence variation in the output
- B. Factors that maximize parameter design.
- C. Factors that strongly influence the mean response.
- D. Factors that impact tolerance design
Answer: A
NEW QUESTION 146
The rated breaking strength of a suspension bridge cable is 150,000 pounds. An example using this cable in a derated condition is which of the following?
Response:
- A. The cable in a 75,000 pound maximum stress application
- B. The cable in a 150,000 pound maximum stress application
- C. The cable as a parallel component.
- D. The cable in a 225,000 pound maximum stress application
Answer: A
NEW QUESTION 147
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