©2023 TVET CDACC
071506T4MTP
MECHANICAL TECHNOLOGY (PRODUCTION) LEVEL 6
ENG/OS/ME/CR/7/06/A
PERFORM WORKSHOP PROCESSES
July/Aug 2023
TVET CURRICULUM DEVELOPMENT, ASSESSMENT AND CERTIFICATION
COUNCIL (TVET CDACC)
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WRITTEN ASSESSMENT
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Time: 3 Hours
INSTRUCTIONS TO CANDIDATES:
1. This paper has TWO sections: A and B.
2. You are provided with a separate answer booklet.
3. Marks for each question are as indicated.
4. Do not write on the question paper.
This paper consists of FOUR (4) printed pages with 16 questions.
Candidates should check the question paper to ascertain that all pages
are printed as indicated and that no questions are missing.
Turn Over
©2023 TVET CDACC
SECTION A: (40 MARKS)
Attempt all questions in this section.
1. List THREE measures to be put in place for fire emergencies. (3 Marks)
2. With an aid of a sketch, explain Upsetting as used in metal forming. (4 Marks)
3. Outline THREE safety precautions to be observed when using a machine in a workshop.
(3 Marks)
4. Distinguish between brazing and oxy acetylene gas welding. (4 Marks)
5. List FOUR functions of a cutting fluid. (4 Marks)
6. Explain FOUR effects of temperature rise during grinding of lathe cutting tool. (4 Marks)
7. State the function of tool rest on pedestal grinder. (2 Marks)
8. With aid of a sketch distinguish between a single cut file and double cut file. (4 Marks)
9. Distinguish between a measurement and inspection as applied in marking out. (2 Marks)
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10. Sketch and label a G-clamp and state TWO of its applications (4 Marks)
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11. State TWO advantages of Casting. (2 Marks)
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12. Differentiate between the following cutting methods when using single point tool.
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a) Orthogonal cutting (or two-dimensional cutting)
b) Oblique cutting (or three-dimensional cutting). (4 Marks)
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©2023 TVET CDACC
SECTION B: (60 MARKS)
Answer any three questions in this section.
13.
a) Determine the table feed for a 14 teeth slab cutter, rotating at 72 rev/min if the
feed per tooth is 0.1mm. (3 Marks)
b) State FIVE safety precaution to be observed when cutting gears in milling
machine (5 Marks)
c) With aid of sketches, explain each of the following milling processes. (8 Marks)
i. Up-cut milling
ii. Down-cut milling
d) Describe the following parts of a milling machine. (4 Marks)
i. overhanging arm
ii. knee om
14.
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a) Identify the following sand casting tools and state one function of each. (6 Marks)
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i.
ii.
iii.
b) Outline FOUR properties a good sand mould should possess to ensure production
of sound castings: (4 Marks)
c) Explain the following properties of sand moulding:
i. refractoriness,
ii. permeability or porosity, Turn Over
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©2023 TVET CDACC
iii. cohesiveness. (6 Marks)
d)
i. Define hot working of metals
ii. List TWO advantages of hot working (4 Marks)
15.
a) Explain the following lathe machine operations:
i. turning,
ii. drilling. (4 Marks)
b) With the aid of sketches, explain the formation of the following chips formed
when machining.
i. continuous
ii. discontinuous chips (6 Marks)
c) With aid of sketches, explain the following type of lathe taper turning methods:
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i. form tool,
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ii. tail stock offset. (10 Marks)
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16.
a) Define the following terms;
i. crimping
ii. seaming:
iii. lacquers: (3 Marks)
b) For soft soldering to be effective, the surface must be free of grease, oil and dirt;
i. Highlight THREE surface cleaning agents used when cleaning
ii. Outline THREE methods for cleaning surfaces to be soldered. (6 Marks)
c) Outline the procedure of soft soldering operations. (5 Marks)
d) Explain the working principle of Manual metal arc welding. (6 Marks)
This is the last printed page.
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