Question 21(Multiple Choice
(Lesson 5.5 LC)
While driving under normal conditions, which of the following principles should be used to keep the appropriate distance between your vehicle and the vehicle in front
of you?
O one second
two seconds
three seconds
O four seconds
Question 22 Multiple Choice Worth 3 points)
(Lesson 3.4 LC)

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.

Aheavily insulated piston-cylinder device contains 0.02 m3 of steam at 300 kpa and 200 °c. 1.2 mpa. d this process. team is now compressed in a reversible manner to a pressure of etermine the entropy change and the work done on the steam during this process