The Risky Project Worth $52,000, Not $35,000
The outcomes were not equally likely. Probability-weighting gives an expected value of $52,000, not the simple average of $35,000.
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FE EXAM · OTHER DISCIPLINES
FE Other Disciplines Practice Questions
Practice FE-style Other Disciplines questions through interactive engineering problems with guided reasoning and detailed solutions.
Interactive problems•Reasoning explained•Solutions included
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PRACTICE SET
Available questions
Choose a question and solve it before reading the final engineering verdict.
QUESTION01
The Risky Project Worth $52,000, Not $35,000
The outcomes were not equally likely. Probability-weighting gives an expected value of $52,000, not the simple average of $35,000.
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QUESTION02
The Process Choice That Broke Even at 10,000 Units, Not 5,000
The fixed-cost difference was correct, but break-even depends on the difference in variable costs. The correct crossover is 10,000 units.
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QUESTION03
The Upgrade Worth $3,675, Not $25,000
Undiscounted cash flows suggested a $25,000 gain; discounted NPV is about $3,675.
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QUESTION04
The Relief Valve That Saw 480 N, Not 560
The vessel pressure was 700 kPa absolute, but the valve disk also had atmospheric pressure acting on the opposite side. Net pressure force depended on the 600 kPa differential.
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QUESTION05
The Source That Fell to 30, Not 60
Eighteen hours represented three half-lives, not two. A 240-unit rate therefore fell to 30, not 60.
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QUESTION06
The Confined Space That Needed 18 m³/min, Not 1,080
Six air changes per hour sounded like 1,080 m³/min when the hour-to-minute conversion was skipped. The required flow was 18 m³/min.
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How do I practice FE Other Disciplines questions?
Choose a topic, solve the problem before seeing the conclusion, and use the final reasoning trail to identify where your original assumption was supported or needed revision. The goal is not only to reach the answer, but to understand the engineering check behind it.