2. "Breakdown voltage" is the voltage at which a Zener diode will O A. stop the flow of reverse current.
O B. stop the flow of either forward or reverse current.
O C. get damaged as a result of overload.
O D. allow reverse current to flow.

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.