Sample of an SBA. It is not perfect but will help. http://www.slideshare.net/adriangreaves/building-technology-sba-adrian-greaves

SBA Practical Project Mark Scheme

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Mark Scheme of SBA Written Assignment

Mechanical Engineering Technology SBA

The school-based assessment (SBA) for CSEC Mechanical Engineering Technology  is comprised of  TWO projects.

• Practical project
• Written assignment

The weighting of the SBA component for the subject is 40% of the overall score.

1.   PRACTICAL PROJECT

The practical project involve candidates designing and producing a product based on modules 1-6, 8 & 9 of the syllabus and under the direction of your teacher (70 marks). This project must  NOT exceed the dimensions of 450 mm  deep  x 400 mm wide   x 675 mm long, nor must it exceed a weight of 2 kg. For the project you are also expected to provide a plan sheet (20 marks) which MUST include the following:

(i) Pictorial sketch
(ii) Orthographic (working) drawings
(iii) Steps of procedure
(iv) List of materials tools and equipment



2.    WRITTEN ASSIGNMENT
This is to be a technical report of about 1000-1200 words and MUST be based on a planned industrial tour.  This project is worth 30 marks.

All projects will be considered the property of CXC and will be retained by your school administration for the council until three  months after the publication of examination results.

GUIDELINES FOR THE PLANNED INDUSTRIAL TOUR
The factory should employ a minimum of twelve workers and use raw material and machinery in the production process.  Your report should be based on one or two visits to the factory, and on discussions with employees in the Mechanical Engineering Technology discipline of the operation.

Your report MUST adhere strictly to the criteria outlined in the CXC mark scheme.  However, it may include data on some of the following, providing that they relate to the topic of the report.

(i) Product(s) made
(ii) Management structure (organization chart)
(iii) Human Resource profile of persons employed (qualification, experience, job description, clas-
         sification, opportunity for promotion)
(iv) Process flow chart of the operation (from raw material to final product)
(v) Method(s) of production
(vi) Types and functions of machines in use
(vii) Types and sources of raw materials used
(viii) Marketing of the product
(ix) Safety programme
(x) Waste disposal
(xi) Environmental protection programme

Diagrams, charts and graphs should be included where appropriate.

The following types of manufacturing enterprises might be explored as possibilities for this report:
(a) Iron  and steel processing plant
(b) Bauxite/alumina plant
(c) Soft drinks or beer plants/breweries – processing or packaging
(d) Food processing
(e) Lumber processing
(f) Roof fabrication
(g) Sugar production and by-products such as rum
(h) Agro-industries
(i) Tool and die
(j) Tannery
(k) Shipping
(l) Fabrication of lumber products such as windows and doors
(m) Air services maintenance
(n) Hotel maintenance services
(o) Apparel and garment industries

Assignment 2: Cutting Fluids /Solutions

Carryout a research on the use and purpose of cutting fluids / solution and coolants in metalwork and mechanical engineering and write a report formatted as outlined below.
Due October 23, 2014

Format

1. Cover page containing:
• Title of project
• Name
• Class
• Subject
• Name of Teacher
2. Introduction: 1) the purpose of the research, 2) background to the use of cutting fluids, 3) importance of using cutting fluids.
3. Body containing:
• Definition of cutting fluid
• types of cutting fluids
• purpose of cutting fluids
• Definition of coolant
• purpose of coolant
• composition of coolant
• Table detailing the cutting fluids that would be used for turning, threading and milling a) Mild steel, 2) Hardened Steel, 3) cast iron, 4) aluminium, 5) copper, 6) brass, 7) bronze
4. Bibliography

Assignment 1 Taper calculations

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Calculating Cutting Speeds

Cutting Speed and Spindle Speed Calculations

1. Cutting Speed

 

Where :

CS = cutting speed in m/min

D = diameter of work in mm

N = spindle speed in revolutions per minute (RPM) in rev/min

π = the constant pie (3.142)

2. Spindle speed

Where:

CS = cutting speed in m/min

D = diameter of work in mm

N = spindle speed in revolutions per minute (RPM) in rev/min

π = the constant pie (3.142)

3. Machining / Cutting Time

Where:

T = Cutting time in seconds.

L = length of cut in mm.

Q = number of cuts taken

f = feed rate in mm/rev.

N = Spindle speed (RPM) in rev/min.

Limitations and Advantages Of tapering Methods