Thika tti iso certified
JANUARY 2021 INTAKE
MODULE 1
DIPLOMA IN MECHANICAL ENGINEERING (PRODUCTION B)
JANUARY 2021 INTAKE
Answer all questions in a separate answer sheet
QUESTION 1
- State three metals used for sheet metal work and state the application for each. ( 6 marks )
-brass
-aluminium
- With aid of a sketch explain the function of a Trammel point ( 4 marks )
- With aid of a sketch, explain Drawing as applied to sheet metal operation ( 6 marks ) application QUESTION 2
a) Sketch the following types of seams used in sheet metal and state the application for each
- Dovetail seam-used to join sections such as one pipe to another pipe or a sheet to a pipe.
- Flanged seam-used to join the bottom of a container to its body.
- Lap seam-is a seam which consists of lapping the edge of one sheet over the other and the joint is made of soldering or rivetting ( 6 marks )
THIKA TTI ISO 9001:2008 CERTIFIED
- State three metals used for sheet metal work and state the application for each. ( 6 marks )
-galvanized iron
-stainless steel
-lead
- With aid of a sketch explain the function of a Trammel point ( 4 marks )
- With aid of a sketch, explain Drawing as applied to sheet metal operation ( 6 marks ) application QUESTION 2
- Dovetail seam-used to join sections such as one pipe to another pipe or a sheet to a pipe.
- Flanged seam-used to join the bottom of a container to its body.
- Lap seam-is a seam which consists of lapping the edge of one sheet over the other and the joint is made of soldering or rivetting ( 6 marks )
c) Figure 1 shows a truncated cylinder. Sketch its surface development using parallel line method
(6 marks)
Fig. 1