27 real Design Validation questions from the Mechanical Design bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is DFMEA?
Junior
A.structured analysis of potential design failure modes, effects and causes, ranked by severity, occurrence and detection before drawings release
B.design verification plan and report listing every test, acceptance criterion, sample size, timing and result needed to prove design intent
C.cumulative damage summed as n/N across load levels, with failure predicted when the total reaches 1.0, used with rainflow-counted histories
D.root-sum-square of tolerances assuming normal, independent variation, allowing looser component tolerances at a small assembly risk
2. Which term means: "structured analysis of potential design failure modes, effects and causes, ranked by severity, occurrence and detection before drawings release"?
A.DFMEA — structured analysis of potential design failure modes, effects and causes, ranked by severity, occurrence and detection before drawings release
B.DFMEA — high/medium/low rating from severity-occurrence-detection tables that replaced the RPN product in the 2019 AIAG-VDA FMEA handbook
C.DFMEA — straight line from the endurance limit on the alternating axis to ultimate strength on the mean axis, bounding safe fatigue combinations
D.DFMEA — design verification plan and report listing every test, acceptance criterion, sample size, timing and result needed to prove design intent
5. Which term means: "high/medium/low rating from severity-occurrence-detection tables that replaced the RPN product in the 2019 AIAG-VDA FMEA handbook"?
A.Action Priority — design verification plan and report listing every test, acceptance criterion, sample size, timing and result needed to prove design intent
B.Action Priority — arithmetic sum of all tolerances in a chain, guaranteeing assembly but forcing tight component tolerances
C.Action Priority — straight line from the endurance limit on the alternating axis to ultimate strength on the mean axis, bounding safe fatigue combinations
D.Action Priority — high/medium/low rating from severity-occurrence-detection tables that replaced the RPN product in the 2019 AIAG-VDA FMEA handbook
8. Which term means: "design verification plan and report listing every test, acceptance criterion, sample size, timing and result needed to prove design intent"?
A.Worst-case stack-up — plot of stress amplitude against cycles to failure, with a knee at 10⁶–10⁷ cycles for steel and no endurance limit for aluminium
B.Worst-case stack-up — straight line from the endurance limit on the alternating axis to ultimate strength on the mean axis, bounding safe fatigue combinations
C.Worst-case stack-up — design verification plan and report listing every test, acceptance criterion, sample size, timing and result needed to prove design intent
D.Worst-case stack-up — arithmetic sum of all tolerances in a chain, guaranteeing assembly but forcing tight component tolerances
14. Which term means: "root-sum-square of tolerances assuming normal, independent variation, allowing looser component tolerances at a small assembly risk"?
A.RSS stack-up — root-sum-square of tolerances assuming normal, independent variation, allowing looser component tolerances at a small assembly risk
B.RSS stack-up — plot of stress amplitude against cycles to failure, with a knee at 10⁶–10⁷ cycles for steel and no endurance limit for aluminium
C.RSS stack-up — high/medium/low rating from severity-occurrence-detection tables that replaced the RPN product in the 2019 AIAG-VDA FMEA handbook
D.RSS stack-up — cumulative damage summed as n/N across load levels, with failure predicted when the total reaches 1.0, used with rainflow-counted histories
17. Which term means: "plot of stress amplitude against cycles to failure, with a knee at 10⁶–10⁷ cycles for steel and no endurance limit for aluminium"?
A.S-N curve — fitting failure times to a distribution whose shape parameter β shows infant mortality below 1, random failure at 1 and wear-out above 1
B.S-N curve — structured analysis of potential design failure modes, effects and causes, ranked by severity, occurrence and detection before drawings release
C.S-N curve — plot of stress amplitude against cycles to failure, with a knee at 10⁶–10⁷ cycles for steel and no endurance limit for aluminium
D.S-N curve — arithmetic sum of all tolerances in a chain, guaranteeing assembly but forcing tight component tolerances
20. Which term means: "straight line from the endurance limit on the alternating axis to ultimate strength on the mean axis, bounding safe fatigue combinations"?
A.Goodman line — arithmetic sum of all tolerances in a chain, guaranteeing assembly but forcing tight component tolerances
B.Goodman line — cumulative damage summed as n/N across load levels, with failure predicted when the total reaches 1.0, used with rainflow-counted histories
C.Goodman line — fitting failure times to a distribution whose shape parameter β shows infant mortality below 1, random failure at 1 and wear-out above 1
D.Goodman line — straight line from the endurance limit on the alternating axis to ultimate strength on the mean axis, bounding safe fatigue combinations
23. Which term means: "cumulative damage summed as n/N across load levels, with failure predicted when the total reaches 1.0, used with rainflow-counted histories"?
A.Miner's rule — root-sum-square of tolerances assuming normal, independent variation, allowing looser component tolerances at a small assembly risk
B.Miner's rule — cumulative damage summed as n/N across load levels, with failure predicted when the total reaches 1.0, used with rainflow-counted histories
C.Miner's rule — design verification plan and report listing every test, acceptance criterion, sample size, timing and result needed to prove design intent
D.Miner's rule — fitting failure times to a distribution whose shape parameter β shows infant mortality below 1, random failure at 1 and wear-out above 1
26. Which term means: "fitting failure times to a distribution whose shape parameter β shows infant mortality below 1, random failure at 1 and wear-out above 1"?
A.Weibull analysis — straight line from the endurance limit on the alternating axis to ultimate strength on the mean axis, bounding safe fatigue combinations
B.Weibull analysis — high/medium/low rating from severity-occurrence-detection tables that replaced the RPN product in the 2019 AIAG-VDA FMEA handbook
C.Weibull analysis — cumulative damage summed as n/N across load levels, with failure predicted when the total reaches 1.0, used with rainflow-counted histories
D.Weibull analysis — fitting failure times to a distribution whose shape parameter β shows infant mortality below 1, random failure at 1 and wear-out above 1
Answers, AI explanations, and a free readiness check
Sign up free to check your answers with explanations, ask the AI tutor anything on any question, and take the free 2-minute readiness check for a scored result. The full AI mock interview, scored like a real panel, unlocks with Pro.