WorksheetsQuiz No. 1_FE Heat and Mass
Total questions: 8
Worksheet time: 55mins
Using the table find the value of density of air (kg/m3^3) at 55 degrees Celsius.
1.08 kg/m3
2.5 kg/m3
3.9 kg/m3
5.1 kg/m3
Using the table find the value of specific heat of air (J/kg-K) at 55 degrees Celsius.
1008 J/kg-K
2155 J/kg-K
3007 J/kg-K
4225 J/kg-K
Using the table find the value of thermal conductivity of air (mW/m-K) at 55 degrees Celsius.
10
28
34
49
Using the table find the value of viscosity of air (Pa-s) at 55 degrees Celsius.
1 x 10 ^-5
2 x 10 ^-5
3 x 10 ^-5
4 x 10 ^-5
Using the table find the value of the pressure of air at 55 degrees Celsius.
11 inHg
21 inHg
30 inHg
55 inHg
Air at 20 deg C flows over a flat plate at 60 deg C with a free stream velocity of 6 m/s. Determine the value of the average convective heat transfer coefficient up to a length of 1 m in the flow direction.
Hint: Flow is in Laminar regime.
5.2 W/m2-K
9.3 W/m2-K
15.6 W/m2-K
22.7 W/m2-K
Air at 20 deg C at atmospheric pressure flows over a flat plate at a velocity of 3 m/s. if the plate is 1 m wide and 80 deg C, calculate the local heat transfer coefficient at x = 300 mm.
Hint: Flow is in laminar regime
1.3 W/m2-K
3.8 W/m2-K
6.2 W/m2-K
8.5 W/m2-K
Air at 20 deg C at atmospheric pressure flows over a flat plate at a velocity of 3 m/s. if the plate is 1 m wide and 80 deg C, calculate the heat transfer rate.
Hint: The average heat transfer coefficient is times two of the local heat transfer coefficient. Use the average heat transfer coefficient to determine the heat transfer.
2 W
8 W
12 W
18
