by Sunday | Oct 2 | NABTEB QUESTIONS
(i) Issuing shares at par: This means that the amount a shareholder pays for a share will actually appears on the share certificate. Share used at the normal value. (ii) Issuing share at premium: This means that a shareholder will pay more than what it appear on the...
by Sunday | Oct 2 | NABTEB QUESTIONS
Preference shares: These are units of a company’s capital which have a fixed rate of dividend. Holders of this class of shares are first when declaring dividends. This classes of shares are of four types namely; participating preference shares, cumulative preferences...
by Sunday | Oct 2 | NABTEB QUESTIONS
(i) The supply voltage of DC machine remains steady while that of AC machine is alternating from positive to negative. (ii) DC welding machine has rotating parts inside while AC machine is static. (iii) The voltage in AC is from main supply while that of DC is from...
by Sunday | Oct 2 | NABTEB QUESTIONS
(i) Undercut – A too rapid rate of travel of electrode or blow pipe. – Use of wrong electrode or blow pipe. – It can be caused by excessive heat built up. (ii) Slag inclusion – Using too low current to weld. – Using too large electrode....
by Sunday | Oct 2 | NABTEB QUESTIONS
ANSWER A weld defect is an imperfection on the weld which may lead to failure of the joint under service e.g. undercut, porosity, and blow holes e.t.c.
by Sunday | Oct 2 | NABTEB QUESTIONS
ANSWER Cast iron is very brittle and this makes it difficult to weld unlike steel. Heat treatment is therefore required. (i) Heat treatment of cast iron before welding prevents cracking due to expansion and contraction. (ii) Heat treatment enables a sound weld to be...