FE Mechanical · Thermodynamics

FE Thermodynamics Practice Questions

Solve FE-style Thermodynamics questions and learn the reasoning behind each answer through interactive engineering cases.

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.

PRACTICE SET

FE Thermodynamics Practice 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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What should I practice in FE Thermodynamics?

Practice the calculations, assumptions, constraints, and failure modes that appear around this topic. Each question here is designed to test whether you can apply the concept when the obvious calculation is not the whole engineering decision.