ent Name Surname: Sayfa: 2/2 7. The helical gears in the simple geartrain have teeth numbers as labeled. The central gear rotates at 125 rpm and drives the two output shafts. Determine the speeds and rotation directions of each output shaft. (10 pts) 125 rpm 45 60 70 85 Output 1 Input Output 2 8. Low-pressure Low-pressure compressor compressor shaft High-pressure Air intake compressor turbine Low-pressure High-pressure turbine Exhaust T jet Fuel line High-pressure Compressor blades Combustor compressor Turbine shaft blades Nozzle Compression Combustion Expansion Exhaust Cross-sectional view of the core's internal structure and components is given for a representative jet engine. Considering six parts of this engine (low&high pressure compressors and turbines, combustor and exhaust jet) and its operation: a) Which part drives the high-pressure compressor? (2 pts) b) Fresh air is pressurized in which parts? (2 pts) c) What is mixed with fuel to produce very hot and high-pressure combustion gases? (2 pts) d) What is provided to the plane by the energy remaining in the combustion gas? (2 pts) e) Regarding fluid mechanics (chapter 6), what is the function of the converging nozzle? (2 pts) 9. Answer the following questions from additional topics: a) Write down the four ethical theories and briefly explain one of them (4 pts) b) Write down the four main steps of time management (2 pts) c) Explain Critical Path Method in a paragraph (4 pts) Pwater 1000 kg/m Ciron =0.45 kJ/(kgC) Paasoline 680 kg/m Hwater 0.001 kg/(m.s) Notes: g=9.81 m/s Cwater 4.18 kJ/(kg.C) Hgasoline (Heating value) = 45 MJ/kg Q=KA (Th-Ti) WN N CASIO fo-MIES PLES DATURAL-UPA GHITT CALC lies 11 MMMN/A SEMESTER BEYKENT UNIVERSITES Page: 1/2 Name Surname Student No Course Exam Date Duration Lecturer Career Planning and Introduction to Mechanical Engineering Midter : 09.01.2024 SO min : Asst. Prof. Muammer Kanh Final Please be sure that your name and surname are written on each page. Question Total Points 2 3 + S 6 7 8 10 Total 15 10 10 15 10 10 10 10 10 100 Grade 1. Water flows through a S-cm-diameter pipe at the average velocity of 1.25 m/s. (a) In the dimensions of L/s, what is the volumetric flow rate? (b) If the radius of the pipe is increased by 40%, by what percentage does the water's velocity change? (15 pts) 2. The Reynolds number (Re) is defined by the equation of 'Re=pvllu' in terms of the following parameters: fluid's density and viscosity, its speed v, and a characteristic length / that is representative of the problem at hand. What is the unit of Re? Show this by using units of these parameters. (10 pts) 3. Neglecting the presence of friction, air drag, and other inefficiencies, how much gasoline is consumed when a 1300-kg automobile accelerates from rest to 80 km/h? Express your answer in the units of mL. (10 pts) 4. A 50-kg iron block at 80C is dropped into an insulated tank that contains 0.5 m of liquid water at 25C. Determine the temperature when thermal equilibrium is reached. (15 pts) 5. A brick wall 0.5 m high, 1.2 m wide, and 150 mm thick has a thermal conductivity of 1.7 W/(m.C). Temperature on the hotter inner face is 1400 C. If the heat loss (in one hour) through the wall is 6120 kJ, what is the temperature of the outer face? (10 pts) 6. As can be seen in figure, the small fan spins at 1400 rpm and cools a rack of electronic circuit boards. (a) Express the motor's angular velocity in the units of deg/s and rad/s. (5 pts) (b) Determine the velocity of the 6-cm tip of the fan blade. (5 pts) 1400 rpm 6 cm