Sample CRE Questions
Check all our sample CRE questions here.
TECH SPOT: SAMPLE CRE QUESTIONS (PART 11)
1. Estimate the individual part failure rate given a base failure rate of 0.0333 failure/hour, a quality factor of 0.98 and an environmental stress factor …
TECH SPOT: SAMPLE CRE QUESTIONS (Part 10)
1. The lifetime of a mechanical lifter is normally distributed with a mean of 100 hours and a standard deviation of 3 hours. What is …
TECH SPOT: SAMPLE CRE QUESTIONS (PART 9)
1. The effects of failure rates on increased temperatures is called the: a. Thermal model b. Full scale Model c. Arrhenius Model d. Derating effects …
TECH SPOT: SAMPLE CRE QUESTIONS (PART 8)
1. Given the density function obtained under accelerated conditions: Determine the density function under normal operating conditions, given an acceleration factor of 5 a. (1/150)exp(-t/150) b.(1/6)exp(-t/6) …
TECH SPOT: SAMPLE CRE QUESTIONS (PART 7)
1. Three components in parallel have mean times to failure of 50, 60, & 70 hrs respectively. The mean repair times are 30, 40 & …