cameroon gce intermediate level material technology and workshop processes 2

cameroon gce intermediate level material technology and workshop processes 2

cameroon gce intermediate level material technology and workshop processes 2

a. Define the following with respect to workshop processes (1 markx5)

i.
ii.
iii.
iv.
Normalizing
Annealing.
Hardening.
Tempering

v. Case hardening
b. Give one example each of vehicle parts, that are made from the above processes.
(0.5 markx5)
c.
List five reasons for heat treating metals. (0.5 markx5)
2. A mild steel engine bolt when correctly tightened provides a tensile load of 3Kn. The bolt is 300mm long and
has a diameter of 15mm. Calculate the stress on the material. How much will the bolt extend? For mild steel
E=200×109N/m2=200GN/m2.
(5mks+5mks=10marks)

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