Wood light frame construction building utilizes platform framing. which of the following is not characteristic of platform framing:

a. the building process starts with a foundation
b. all vertical platforms must be braced
c. the exterior walls are load bearing
d. once the vertical walls are all placed, the next platform sits on those vertical walls.
e. all of the above

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]