by Sunday | Oct 2 | NABTEB QUESTIONS
(i) D.C. machines can be used to weld non-ferrous metals. (ii) Bare wire electrodes can be carefully used. (iii) It can be used where there is no electricity supply.
by Sunday | Oct 2 | NABTEB QUESTIONS
Destructive tests are those tests carried out with the joint destroyed by bending, cutting or application of chemical e.g. microscopic, macroscopic, chemical, tensile e.t.c. Non – destructive tests are carried out without causing any damage to the metal e.g. visual...
by Sunday | Oct 2 | NABTEB QUESTIONS
(i) The current should be reduced to normal. (ii) A wet electrode should be dried especially in the oven. (iii) Metal surface must be properly cleared free from rust, dirt, oil or grease.
by Sunday | Oct 2 | NABTEB QUESTIONS
Excessive spatter may occur in arc welding as a result of: (i) Too high welding current used (ii) Wet electrode being used (iii) Dirty metal surface e.g. Oil, grease.
by Sunday | Oct 2 | NABTEB QUESTIONS
(i) A non-ferrous metal (aluminum) can be heat treated by annealing after cold working which increases hardness. This can be done by heating with blow pipe and smeared with soap or match stick rubbed on the metal. When soap turns black, it means the annealing...
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
Original price was: ₦1,000.00.₦300.00Current price is: ₦300.00.