Define the combustion equipment efficiency.

14. What is a Moody Chart used to determine? 15. Express a volume of 0.375 litres in Sl units 16. What is the name given to the shape of the velocity profile of a fluid flowing in a turbulent manner through a pipe? Provide a sketch of this profile. 17. Write an expression relating mass flow rate to the velocity of a fluid. 18. State the conditions required for a stoichiometric combustion reaction. 19. What would be the products of combustion from the stoichiometric combustion of a hydrocarbon fuel? 20. Using the steam tables, what is the value of specific enthalpy of saturated liquid water at 200 kPa? 21. Name two thermodynamic properties that may be found in steam tables. 22. What does the term emissivity mean? 23. Name one characteristic of a surface with low emissivity? 24. Explain the difference between natural and forced convection 25. Express a pressure of 200 milli-bar in Pa 26. What are the units for the overall heat transfer coefficient, U? 27. As a hot air balloon rises, the…

7. Describe the difference(s), if any, between pre-mixed and diffusion type combustion. Please select all answers that apply: a) In pre-mixed type combustion, the fuel and oxidizer are mixed before entering the combustion chamber. b) In diffusion type combustion the fuel and oxidizer enter the combustion chamber from two separate inlet streams. c) In pre-mixed combustion the fuel and oxidizer enter the combustion chamber through a single stream. d) In diffusion combustion, the fuel is injected through a nozzle. e) In diffusion combustion, the oxidizer swirls around the fuel nozzle.

Which gas leakage do you think poses a greater risk for fire? Explain