COREN Craftsman case studies
COREN Craftsman · Put your knowledge to work in context.
The COREN Craftsman credential sits within the framework of the Council for the Regulation of Engineering in Nigeria, the statutory body set up by the Federal Government of Nigeria with the mandate to regulate the practice of Engineering in all aspects and ramifications. COREN was established by Decree 55 of 1970, amended by Decree 27 of 1992 and now the Engineers (Registration, etc.) Act CAP E 11, 2004, further amended by the Engineers (Registration, etc.) (Amendment) Act No 3, 2018. The COREN Craftsman case studies are 5 cases and about 3,691 words.
1Twisted gate frames and an oxygen cylinder under the bench
A workshop in Kano has a contract for twelve gate frames, each 3.0 m wide by 1.8 m high, built from 40 x 40 x 3 mm square hollow section. After the first four frames, diagonal measurements differ by 9 mm and the leaves twist enough to bind on the hinge pins.
746 words, about 4 min2Revision conflict on an aluminium bracket drawing
A Lagos consultancy has issued a drawing for an aluminium mounting bracket for a roof-mounted ventilation unit, built by a fabricator in Ikeja. Revision B, marked for construction, gives hole centres of 250 mm and overall length 260 mm, with a general tolerance of plus or minus 1 mm.
783 words, about 4 min3Repeated key failure on a coastal pump coupling
A coastal water-treatment plant near Port Harcourt has a horizontal centrifugal pump whose 45 mm AISI 304 stainless shaft drives through a keyed coupling. The key is 12 x 8 x 70 mm and has failed three times in eight months, each time with a twisted shear fracture near the motor end.
710 words, about 4 min4Unsafe drill press and a mismatched grinding disc
A vocational training centre in Ibadan uses a pedestal drill press for 10 mm holes in 6 mm mild steel plate. Trainees report the drill wandering and the chuck getting hot.
742 words, about 4 min5Pressure to certify unsupervised concrete columns
You are a COREN-registered mechanical engineer employed by a state water corporation in Enugu. A contractor has cast the ground-floor columns of a two-storey office block using concrete from a site mixer.
710 words, about 4 min