Exam2026Proposed solution included

MET 423 Joining, Fabrication And Assembling Technologies Exam 2026

MET 423: A 1-page End of Course Examination for Joining, Fabrication and Assembling Technologies (MET423) at the University of Buea College of Technology, Department of Mechanical Engineering, taught by Wilson/Ndongmo, dated February 2026. The paper has three problems: Problem I asks students to define and sketch a fillet weld, a groove weld and the heat-affected zone (HAZ) in a fusion weld, explain the technical difference between brazing and soldering, discuss when brazing/soldering is preferred over welding, and list ways a threaded fastener can fail during tightening. Problem 2 is a quantitative heat-transfer problem computing power densities within concentric circles of a welding heat source, and a fillet-weld heat-balance calculation using heat-transfer and melting factors. Problem 3 asks students to illustrate four adhesive-bonding joint designs and identify which should be avoided.

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University of Buea

College of Technology - COT

Mechanical Engineering - MET

MET4232026

Joining, Fabrication And Assembling Technologies

Exam · First Semester · Level 400

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3.
Heat-affected zone (HAZ) in a fusion weld? II. What is the technical difference between brazing and soldering? (6 Marks) III. Under what circumstances would brazing or soldering be preferred over welding? (3 Marks) IV. What are the three ways in which a threaded fastener can fail during tightening? (3 Marks)
2.
A fillet weld on low carbon steel has a cross-sectional area of 20.0 mm 2 and is 250 mm long. Determine (a) the amount of heat (in joules) required to perform the weld, and (b) the amount of heat that must be generated by the heat source, if the heat transfer factor is 0.80 and the melting factor is 0.60?