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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define film resistance in the context of heat transfer.
💡 Hint: Think about the movement of heat through fluids.
Question 2
Easy
What does the convective heat transfer coefficient represent?
💡 Hint: It starts with 'h'.
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 is the formula for calculating film resistance?
- R_conv = hA
- R_conv = 1/(hA)
- R_conv = (hA)²
💡 Hint: Think about how heat flows.
Question 2
True or False: An increase in surface area increases film resistance.
- True
- False
💡 Hint: Refer to the formula.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A pipe with a circular cross-section has a convective heat transfer coefficient of 45 W/m²·K and a surface area of 3 m². Calculate R_conv. If the coefficient decreases to 20 W/m²·K, what is the new resistance?
💡 Hint: Calculate using the given values.
Question 2
Given a system where the surface area can be increased from 2 m² to 10 m² while maintaining h constant at 25 W/m²·K, discuss the impact on heat transfer efficiency and R_conv.
💡 Hint: Examine the effects of changing A in the film resistance formula.
Challenge and get performance evaluation