Related Questions

Which of the following factors adversely affects the capacity of the leadacid battery ?
A Temperature of surroundings
B Specific gravity of electrolyte
C Rate of discharge
D All of the above
In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, $$l$$ = Span of the spring, n = Number of plates, b = Width of plates and t = Thickness of plates)
A $$\frac{{{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
B $$\frac{{3{\text{W}}l}}{{2{\text{nb}}{{\text{t}}^2}}}$$
C $$\frac{{2{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
D $$\frac{{3{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$
The ampere-hour efficiency of a leadacid cell is normally between
A 20 to 30%
B 40 to 50%
C 60 to 70%
D 90 to 95%
When a lead-acid battery is in fully charged condition, the color of its positive plate is
A dark grey
B brown
C dark brown
D none of above
During discharge, the active material of both the positive and negative plates is changed to
A Pb
B PbO2
C PbO
D PbSO4
The composition of the electrolyte in a fully charged battery is that
A The electrolyte is pure distilled water
B The electrolyte is pure sulphuric acid
C The electrolyte is a mixture of 64% distilled water and 36% sulphuric acid by weight
D The electrolyte is a mixture of 90% distilled water and 10% sulphuric acid by weight
The specific gravity of acid in a fully charged battery is generally
A 1.00
B 1.28
C 1.82
D 2.81
The negative plates of a lead acid battery has
A Lead peroxide (PbO2)
B Spongy lead (Pb)
C Lead sulphate (PbSO4)
D Sulphuric acid (H2SO4)
Under what method of underwriting does an underwriter assign positive rating points for all negative or adverse factors (negative points for any positive or favourable factors)?
A Judgment
B Arbitrary
C Numerical rating
D Single step
The positive plates of a lead acid battery has
A Lead peroxide (PbO2)
B Spongy lead (Pb)
C Lead sulphate (PbSO4)
D Sulphuric acid (H2SO4)

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