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

1. A trapezoid-shaped potato with base lengths of 1.5 cm and 2.0 cm respectively and a height/thickness of 0.5 cm was dried at a temperature of 70 ^oC in a convective oven for 24 h, if the surface temperature of the potato remained at 65 ^oC throughout the drying operation, describe the different changes that occurs during the constant and falling rate periods.

A high performance 4 stroke supercharged gasoline engine is being designed. The target specifications are as follows:

1. IMEP: 25 bar at peak power
2. bsfc:    237 g/kWh
3. isfc:     211 g/kWh
4. Bore to stroke ratio:    1.1
5. Number of cylinders: 4
6. Maximum mean piston speed: 21 m/s
7. Compression ratio: 10.5:1
8. Simulation results indicate that the indicated work per cylinder per cycle needs to be 1550 J/cyl/cyc.

Based on the provided information, finalize the engine design for the following parameters:

1. Bore and stroke (mm)
2. Engine displacement (litre)
3. Engine Speed at peak power (rpm)
4. Peak brake power (kW)
5. Fuel flow rate at peak power (kg/hr)
6. The minimum cylinder volume (cm³)

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.

Please write an introduction about materials absorbing sound.No plagiat please

For ethanol liquid C_5 H_5 O H with 50% excess of air. Determine adiabatic flame temperature

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.

A closed container with a volume of 2 m3 contains 4 kg of saturated liquid and saturated steam mixture water at 200 kPa pressure. Heat is given from the ambient temperature of 160⁰C until the water in the container is completely saturated. Note: T (K) = 273 + ºC
a) Find the entropy change of the system.
b) Find the heat transfer to the container.
c) Find the total entropy change.

A renowned automotive company has 1798 cc inline-4 engines working on Atkinson cycle (by late closing of intake valves during compression stroke). It has minimum compression ratio of 6.5:1 and expansion ratio of 13.5:1. If at part load conditions the pressure at the begining of compression stroke is 80 kPa and the temperature at the start of compression stroke is 60C. (Use gasoline with QHV value = 43000 kJ/kg, AF=19, Combustion Efficiency = 97% and EGR=20%). Do complete thermodynamic analysis

AERODYNAMICS

5- What is the effect of a headwind which is 20% of the landing speed on a landing distance?

6- What is the effect of a tailwind which is 20% of the landing speed on a landing distance?

7- Consider the case of two airplanes of the same type and c.g. position but of different gross weights. The use of the maximum coefficient of braking friction will bring both airplanes to a stop in the same distance. As a result, both airplanes would have identical acceleration and identical stop distances from a given velocity. What is the principal difference between the two airplanes as they reach a stop?

8- In the prediction of takeoff distance from the handbook data. What are the primary considerations must be given for Reciprocating powered airplane and Turbine powered aircraft?

An incompressible fluid oscillates harmonically (V = V0 sin(wt), where V is the velocity) with a certain frequency in a 19 cm diameter pipe. A 1/4 scale model is to be used to determine the pressure difference per unit length, ∆?? at any instant along the pipe. Assume that ∆?? = ?(?, ?0,?,?,?,?)

Where D is the pipe diameter, ω the frequency, t the time, μ the fluid viscosity, and ρ the fluid density.

a) Determine the similarity requirements for the model and the prediction equation for ∆??.

b) If the same fluid is used in the model and the prototype, and the model frequency is 250 rad/s, what is the prototype frequency?

Provide a brief overview of geoengineering technologies and comment on why they are not more aggressively investigated as climate change solutions?

Discuss the requirements of avionics equipment with respect to following aspects.

(a) Environment

(b) Weight

(c) Reliability.

In an interview, you were asked to prepare a short essay to elaborate the integration process in handling limited resources in engineering project. It requires you to reflect yourself in the Project Manager roles. (Word limit : 700 to 800 )

Explain how air compressor follow both the first and second laws of thermodynamics?