1. A steam powerplant operating on an ideal Rankine Cycle is operating at a boiler pressure of 5.75 MPa, steam enters the turbine at 500°C and expands to 147 kPa. If the powerplant is producing 5MW of energy find the following:

a. Enthalpies at each point of the cycle 1,2,3,B

b. Net work in kj/kg

c. Mass flow rate of throttle steam used by the powerplant

d. heat added in the boiler

e. heat rejected in the condenser

f. cycle thermal efficiency

4. 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?

Design a double-dwell cam to move a follower from 0 to 2.5 in. in 60°, dwell for 120°, fall 2.5 in. in 30°, and dwell for the remainder. The total cycle must take 4 sec. Size the cam for a 1-in. radius roller follower considering pressure angle and radius of curvature. Use eccentricity only if necessary to balance these functions. Plot both these functions. Draw the cam profile. Repeat this for a flat-faced follower. Which one would you use?

The stress state on the inside flange of an aluminum alloy 2024-T3 wheelhub is found to beσxx=−83 MPa,σyy=−145 MPa,σzz=−35 MPa,σxy= 44 MPa,σxz= 0, .σyz=−22 MPa. What is the safety factor guarding against failure assuming theloads are static?(A) 2.4(B) 3.7(C) 1.8(D) 2.7

Define Octane number and Cetane number?

in 200 words

heat transfer

The double-glazed window with a height of 1.2m and a width of 2m has a gap of stagnant air (k = 0.026W / m ° C) with a width of 12mm between the glass of 3mm (k = 0.78W / m ° C). On a day when the outside temperature is kept at 24 ° C, find the continuous heat transfer rate and inner surface temperature in this glass window. (Take the heat transfer coefficients h1 = 10W / m² ° C and h2 = 25W / m² ° C on the inner and outer surface of the window and neglect the number of heat transfer coats by radiation)
b) Interpret how the heat transfer would have been if there was a vacuum between the two glasses (air was completely discharged).

Task 2 – Subsequent Motion

The ball in Task 1 will then continue to bounce and rebound until it loses all energy. By first finding an expression for the maximum height of the ball after the first bounce, find formulas for the total distance travelled by the ball (i.e. the total distance travelled up and down for all bounces) and the total time taken to complete its motion. A ball of mass 0.06 kg is dropped from rest from a height of 1 metre. The coefficient of restitution between the ball and ground is 0.9. Using your model, find the total distance travelled and total time take.

Notes:

This part of the assignment is testing your ability to use restitution, energy and constant acceleration equations.

Can you give some important viva questions after observing these topics listed below?

UNIT I

Projections- projections of straight lines, planes and solids, section of solids.

Isometric projection of solids.

UNIT II

Threaded fasteners: Terminology, Screw threads forms and their uses, Specifications for bolts and nuts, Use of washers, Types of bolts and nuts, Special purpose nuts, Use of stud & Tap bolt, Locking arrangements for nuts and Foundation bolts.

UNIT III

Rivets and riveted Joints: Riveting, Rivet heads, Caulking and Fullering. Testing of rivets, Failure of rivets/riveted joints.

UNIT IV

Cotter and other joints: Cotter, Gib, Types of Cotter joints, Knuckle joint

Keys and Shaft couplings: Key and keyway, types of keys, Types of shaft coupling

Bearings: Classification of bearings, Bearing materials, Prevention of rotation of brasses and brackets ,

UNIT V

Pipe Joints: Pipe materials and applications. Types joints.(ta) Introduction to Engineering and Machine Drawing with AutoCAD.

At the beginning of the compression process of an air standard Otto cycle, p₁ = 1 bar, T₁ = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of V_d = 2.0 L. Determine per cylinder:

a)    the volume at state 1.
b)    the air mass per cycle.
c)    the heat addition per cycle, in kJ.
d)    the heat rejection per cycle, in kJ.
e)    the net work per cycle, in kJ.
f)     the thermal efficiency.
g)    the mean effective pressure, in bar.
h)    Develop a full exergy accounting per cycle, in kJ. Let T₀ = 300 K, p₀ = 1 bar.
i)    Devise and evaluate the exergetic efficiency for the cycle.

Determine the heat transfer rate per unit width for a 1.1-m long plate with a surface temperature of 125°C for critical Reynolds numbers corresponding to (A) 105, (B) 5 x 105, and (C) 106. Air flows over the plate at 25°C with a velocity of 21 m/s.

Toflokpo-Crane is new company that specializes in designing and manufacturing small-scale automatic jib cranes for moving heavy loads around a workshop or production line environment. Their primary selling point is the integration of neural network-based imaging technology to enable fully automatic identification of objects to pick-up, removing the need for human intervention. The primary components of a jib crane are the floor mounted pillar (containing a rotational motor), the jib/boom mounted on-top of the pillar, the customisable hoist that can traverse the jib/boom as well as raise or lower a pick-up attachment, the pick-up attachment that allows the crane to connect with the goods to move, the high-definition camera array that monitors the area under the pick-up attachment, and the AI unit that processes the camera input and directs the crane. Most pillars are of fixed height; however, the user can manually adjust the height for some pillars using a handle positioned at the pillar base.

Describe two requirements that you have extracted from the description above (two sentences each). For each, state whether it is functional or non-functional .

Identify the stakeholders in the system with justification

The description above is intentionally vague. Identify as many principal components of the Toflokpo-Crane control system as possible and how these might interact with each other. You may wish to use a diagram to illustrate these components and how they connect (1 mark for each correct component identified, up to a maximum of 10 Marks).

Describe two additional requirements that you can reasonably assume from the above description, but are not mentioned in the description above (two sentences each). State whether they are functional or non-functional .

Product Description: This is a description for a new software product that an end-user wants to have developed. It provides high level information about what the user envisages the product will do.

Tasks: For this exercise, your role is as a software architect on a project team. Your project manager has tasked you with converting the product description into documentation for the project development team using the software project management techniques you have learned. The tasks section lists the pieces of documentation you need to produce.

Toflokpo-Crane engineers are awarding you the project of developing the software control system for the crane. There are two ways that the crane should be controlled. First, an on-floor administrator should access a crane control panel enabling manual control of the crane via a Web interface hosted by the crane (accessible via the local Wi-Fi network). They can also toggle between manual and autonomous mode, as well get a live feed from the camera arrays using the Web interface. The camera arrays are only powered when in use. If in autonomous mode, the crane will be controlled by the AI Unit, based on input from the camera array. The AI Unit and human operator share the same operations. Internally, the control system needs to send requests to the other crane components to facilitate pick-up and movement/drop-off of goods. The pillar can rotate a given number of degrees and the hoist can move a number of inches forward or backward along the jib, as well as raise/lower the attachment a number of inches. The Hoist knows the length of the Jib to avoid traversing further than the length of the Jib. The control system should support different attachments natively, as all available attachments share the same base set of commands. Toflokpo-Crane currently makes attachments for picking up packing crates and goods bags. In emergencies the crane can be shut down using a red stop button on the pillar.

TASKS

Describe two requirements that you have extracted from the description above (two sentences each). For each, state whether it is functional or non-functional .

Identify the stakeholders in the system with justification

The description above is intentionally vague. Identify as many principal components of the Toflokpo-Crane control system as possible and how these might interact with each other. You may wish to use a diagram to illustrate these components and how they connect (1 mark for each correct component identified, up to a maximum of 10 Marks).

Describe two additional requirements that you can reasonably assume from the above description, but are not mentioned in the description above (two sentences each). State whether they are functional or non-functional .

Explain the best technique to increase the impact resistance and overcome the cracking problem of nails and bolts during the quenching process. With the aid of sketches, briefly describe how to conduct this procedure.

Derive a finite-difference method for solving the non-linear parabolic equation using the Explicit Method

Ut=v*Uxx-U*Ux

Where v is the viscosity

rewrite the below-working principle of hydraulic power steering system in your own word with out missing the general concept of the principle

In this type of power steering system as we discussed above the hydraulic force is used to multiply the steering input force in order to smoothen the steering of the front wheels. This hydraulic force is generated by a series of components that include a hydraulic cylinder, rotator hydraulic pump, hydraulic lines, highly compressed hydraulic fluid, and a coupling mechanism that can couple this hydraulic system with the rack of the steering system.

• When the driver provides input by rotating the steering wheel, the hydraulic pump driven by the engine starts pumping the highly compressed hydraulic fluid through lines.

• The hydraulic pressure produced by the pump enters the hydraulic cylinder which in turn applies pressure over the cylinder’s piston.

• The piston which is under high pressure starts moving from one end to the other which in turn pushes the further fluid through lines, with this movement of piston the input force applied by the driver is multiplied several times.

• This high-pressure fluid sent by the hydraulic cylinder then applies the pressure to the attached pinion through the coupling mechanism which in turn applies high force to the rack gear and the steering action in the front wheels takes place.