FE EXAM · MECHANICAL

FE Mechanical Practice Questions

Practice FE-style Mechanical questions through interactive engineering problems with guided reasoning and detailed solutions.

Interactive problems•Reasoning explained•Solutions included

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E-053 · FE MECHANICAL Thermodynamics

The Refrigerator With a COP Greater Than One

The refrigerator removed 6 kW of heat using 2 kW of work. A COP of 3 was correct, not impossible.

Refrigerator Cop Intermediate 5–10 min

Solve This Question → The full solution unlocks after the investigation.

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Each topic groups questions around a specific FE knowledge area. Topic pages become indexable only after they contain a meaningful practice set.

Thermodynamics

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Available questions

Choose a question and solve it before reading the final engineering verdict.

E-053Thermodynamics

The Refrigerator With a COP Greater Than One

The refrigerator removed 6 kW of heat using 2 kW of work. A COP of 3 was correct, not impossible.

Refrigerator Cop5–10 min

E-052Thermodynamics

The Turbine That Produced 1.2 MW From an Enthalpy Drop

The turbine power came from a 600 kJ/kg enthalpy drop, not from subtracting internal energies blindly.

Steady Flow Energy Equation5–10 min

E-051Thermodynamics

The Sealed Tank That Reached 150 kPa, Not 133

The gas temperature rose from 300 K to 450 K. The pressure did not scale with Celsius temperature.

Ideal Gas Constant Volume5–10 min

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How do I practice FE Mechanical 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.