by Sunday | Oct 2 | NABTEB QUESTIONS
(i) Ductility: This is the ability of material to be drawn into thin wire without fracture e.g. copper, aluminum, e.t.c. it is the opposite of brittleness. (ii) Malleability: This is the ability to be hammered, rolled or bent without fracture or ability of metal to...
by Sunday | Oct 2 | NABTEB QUESTIONS
ANSWER Neutral flame is generally used for brazing. Oxidizing flame may be used when present metal or filler rod contains about 50% zinc to prevent zinc loss during soldering.
by Sunday | Oct 2 | NABTEB QUESTIONS
ANSWER (i) To dissolve any oxide that is present on metal surface. (ii) To prevent corrosion or oxidation by excluding air. (iii) It enables spelter to flow easily along the joint. (iv) It enables solder to adhere to metal surface.
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.
Land Law and the Consequences of Unauthorized Land Transfers in Nigeria
Original price was: ₦1,000.00.₦300.00Current price is: ₦300.00.