As a lubricant engineer, you design a new friction modifier as an additive for synthetic oil to reduce friction between two surfaces. Describe the content of your new friction modifier and mechanism to protect the surface.
In: Mechanical Engineering
For the stress data given below with the nearest error of 1:
27-17-11-24-36-13-29-22-18
23-30-12-46-17-32-48-11-18
18-32-26-24-38-24-15-13-13
18-21-27-20-16-15-37-19-19
a) Construct a frequency distribution table.
b) Construct the three types of statistical graphs.
c) Determine the (1) Mean, (2) Median, (3) Mode, (4) Range,
Variance, and (6) Standard Deviation.
In: Mechanical Engineering
Ai inventor proposes a four -stroke cycle running on helium. The engine has a compression ratio of 8 and maximum operating temperature of 1,500 K. The atmospheric conditions are temperature of 300 K and pressure of 100 kPa. The processes can be approximated as below:
1- 2 isentropic compression
2- 3 constant volume heat addition
3- 4 isentropic expansion
4- 1 constant pressure heat removal
a.
Plot P-v and T-s diagrams for this cycle.
b.
Determine state conditions at the end of each step by filling up the table below.
c. Heat addition
d. Net work
e. Thermal efficiency
Hint: Cp= 5.193 kJ/kg.K, Cv = 3.116 kJ/kg.K, R = 2.077 kJ/kg.K, k = 1.667
Please show work for all questions a-e. Thank You
In: Mechanical Engineering
Course Title: BUSINESS DYNAMICS: SYSTEM THINKING AND MODELLING FOR A COMPLEX WORLD
Required
What System Dynamics
Meaning of feedback, types, with examples
In: Mechanical Engineering
Please Do it Clearly with each step and FAST
Use music wire to make a series of springs with wire diameters
[0.075”, 0.080”, 0.085”, 0.090”].
Each spring should have a free length of 3” and rate of 50 lbf/ft
and exactly 20 total coils. The
ends are squared and ground and the load factor of safety should be
1.1.
For each wire size, list the figure of merit and the spring index,
C.
All else being equal, which wire diameter makes the most
meritorious design?
In: Mechanical Engineering
Flue gases from an incinerator are released to atmosphere using a stack that is 0.62 m in diameter and 10.0 m high. The outer surface of the stack is at 45°C and the surrounding air is at 10°C. Determine the rate of heat transfer from the stack, assuming a. there is no wind and, b. the stack is exposed to 21 km/h winds.
In: Mechanical Engineering
1 A steel helical spring carries a compressive load of 32.4 pounds at a deflection of 0.25 inches. Maximum stress is 73240psi. The spring has 1.5 end turns. Calculate the value of c for the spring of minimum volume material. Calculate the value of d and choose the nearest standard wire diameter for the actual spring. Calculate the corresponding R and the number of active coils Nc. Also, calculate the material in the spring.
In: Mechanical Engineering
An ideal refrigeration cycle utilizes R-134a as a working fluid. If the fluid enters the compressor as saturated vapor at 6 C and enters a throttling valve as a saturated liquid at 1.2MPa. Assuming the mass flow rate of fluid is 1 kg/sec. 1. The heat received by the fluid (kJ) is 2. The heat received by the surroundings (kJ) is 3. The power input to the compressor (kJ) is 4. The coefficient of performance is
In: Mechanical Engineering
Multiple Choice
1. Which of the following is not used to define a chamfer?
a. Angle and a distance
b. Distance and distance
c. Two angles and a distance
2. Which tool is used to draw a spring?
a. Coil
b. Loft
c. Sweep
3. The Edit Sketch tool can be applied to shapes created with which of the following tools?
a. Extrude
b. Rectangle
c. Revolve
d. Hole
4. The Edit Feature tool can be applied to shapes created with which of the following tools?
a. Circle
b. Line
c. Point, Center Point
d. Extrude
5. Which of the following parameters cannot be used to draw a work plane?
a. Angle to a plane
b. Point and a tangent
c. 3-Point
d. Tangent to face through
6. Which of the following is a material not listed under the Physical tab of the Properties dialog box?
a. Mild Steel
b. Aluminum Bronze
c. Glass
7. Sketched shapes can be projected between work planes using which tool?
a. Sweep
b. Boundary Patch
c. Move Face
d. Project Geometry
8. Which of the following will happen if a work plane is deleted?
a. The work plane will disappear from the screen and all entities will be deleted.
b. The work plane will disappear from the screen and all entities will remain in place.
9. Why are ribs used on molded parts?
a. To increase the part's flexibility
b. To balance the part
c. To increase the part's strength
10. The Face Draft tool is used to
a. Create airflow
b. Create an angled surface
c. Create a current behind a moving object
In: Mechanical Engineering
In: Mechanical Engineering
A high performance 4 stroke supercharged gasoline engine is being designed. The target specifications are as follows:
Based on the provided information, finalize the engine design for the following parameters:
In: Mechanical Engineering
My device is an AIR COMPRESSOR
Choose the working fluid (substance) for your model device
Choose the inlet substance conditions such as temperature, pressure, velocity, mass flow rate or volume flow rate, quality, etc
Choose the outlet substance conditions based on the available information, or design the outlet conditions based on your research.
DRAW the system you are analyzing, including the SYSTEM BOUNDARY,
Show ALL INTERACTIONS between the system and surroundings on your drawing
Write the Conservation of mass equation as it applies TO YOUR SYSTEM
Write the Conservation of Energy equation as it applies TO YOUR SYSTEM
List all the assumptions and idealizations for the process
Calculate the thermo efficiency of the device. Be sure clearly shows equations, calculation process, intermediate answers/results,and final results. Units are critically important in all calculations.
In: Mechanical Engineering
Please write an introduction about materials absorbing sound.No plagiat please
In: Mechanical Engineering
For ethanol liquid C_5 H_5 O H with 50% excess of air. Determine adiabatic flame temperature
In: Mechanical Engineering
Consider the Rankine power cycle using vapor and liquid.
a: Explain what kinds of problems the Carnot Vapor Cycle has.
b: Draw a T-s diagram for the ideal Rankine cycle and label each process explicitly.
c: There is a method to superheat steam to high temperature in order to improve the efficiency of the ideal Rankine cycle. Explain its advantages and disadvantages explicitly.
d: Name the gas power cycle which uses the same four processes in its cycle and draw the T-s diagram and the P-v diagram for the gas power cycle.
In: Mechanical Engineering