EML4147C Test 1 Spring 2007

EML4147C Test 1 Spring 2007 - EML 4147C Test 1 Name 1a 9...

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EML 4147C Test 1 Name _________________________ 1a) ( 9 points) What is the heat generation rate q in the wall? a) 1000 W/m 3 b) 10,000 W/m 3 c) 200,000 W/m 3 d) 300,000 W/m 3 e) none of the above 1b) (8 points) Determine the heat flux at the wall face where x = 0. a) 0 b) 100 W/m 2 c) 10,000 W/m 2 d) 20,000 W/m 2 e) none of the above 1c) (8 points) Determine the heat flux at the wall face where x = 50 mm. a) 0 b) 100 W/m 2 c) 10,000 W/m 2 d) 20,000 W/m 2 e) none of the above 2. (25 points) Find the total resistance of this circuit. a) 1.2 °K/W b) 46.9 °K/We c) 18.3 °K/W d) 6.8 °K/W e) none of the above 3a.) (13 points) What is the rate of heat loss by radiation from the burner? a) 21 W b) 62 W c) 133 W d) 193 W e) none of the above 3b.) (12 points) What is the rate of heat loss by convection from the burner? a) 76 W b) 101 W c) 142 W d) 206 W e) none of the above 4.) (25 points) If the overall heat transfer coefficient is 200 W/m 2 ·K, estimate the required surface area. a) 1.6 m 2 b) 33.1m 2 c) 51.5m 2 d) 75.6m 2 e) none of the above Page 1 of 10
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EML 4147C Test 1 Name _________________________ Conduction Equations ˆ ˆ ˆ '' ( ) T T T q k T k i j k x y z = - ∇ = - + + p T T T T k k k q C x x y y
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EML4147C Test 1 Spring 2007 - EML 4147C Test 1 Name 1a 9...

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