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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for effectiveness (ε)?
💡 Hint: Think of how actual heat transfer compares to the maximum heat it could achieve.
Question 2
Easy
Explain what NTU represents.
💡 Hint: Recall the relationship between heat transfer area and heat capacities.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the symbol ε represent in heat exchangers?
- Efficiency percentage
- Heat transfer rate
- Effectiveness
💡 Hint: Remember, it's a ratio relating actual transfer to the maximum potential.
Question 2
Is NTU calculated using the formula NTU = UA / Cmin?
- True
- False
💡 Hint: Think about what each component stands for.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A counter-flow heat exchanger has U = 500 W/m²K and A = 10 m². If Cmin = 20 W/K, calculate NTU and effectiveness when Thot,in is 80°C and Tcold,in is 20°C.
💡 Hint: Break down your calculations step by step.
Question 2
In a heat exchanger with effectiveness 0.7 and minimum capacity of 25 W/K, determine the maximum possible heat transfer if Thot,in = 90°C and Tcold,in = 30°C.
💡 Hint: Use known formulas and elemental relationships for finding Q.
Challenge and get performance evaluation