4. A new factory is to be established to produce reinforcement bars for the construction industry. This will require an initial investment of Birr 10 million. It is expected that after three years of operation an additional investment of Birr 5 million will be required; and after six years of operation, another investment of Bill 3 million. Annual operating costs will be Birr 3 million and annual revenues will be Birr 8 million. The life of the plant is 10 years. If the interest rate is 15% per year, compounded annually, a. what is the NPV of this plant?

Fluids at rest possess no flow energy. a)- true b)- false

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.