Which of the following battery is used for air-craft _____________?

A. breakdown of one or more separators
B. excess accumulation of sediment at the bottom of the cell
C. both (A) and (B)
D. none of the above

A. manometer
B. a mechanical gauge
C. hydrometer
D. psychrometer

A. adding distilled water
B. adding so-called battery restorer
C. a dose of H2SO4
D. none of the above

A. 0.1V
B. 0.26 V
C. 1.1 V
D. 2 V

A. compactness
B. lower e.m.f.
C. small quantity of electrolyte used
D. higher internal resistance

A. two rate charge control
B. trickle charge
C. floating charge
D. an equalizing charge