Technician a says that on-board self-diagnostics test mode procedures should be conducted on a cold engine. technician b says that many diagnostic trouble codes (dtcs) will monitor items only when the engine control system is in closed loop. who is correct?

The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m