The active materials of a nickel-iron battery are___________?

Related Mcqs:

1. The active materials on the positive and negative plates of a fully charged lead-acid battery are_______?

   A. lead and lead peroxide
   B. lead sulphate and lead
   C. lead peroxide and lead
   D. none of the above

2. In a battery cover is placed over the element and sealed to the top of the battery container. This is done____________?

   A. to reduce evaporation of water from electrolyte
   B. to exclude dirt and foreign matter from the electrolyte
   C. to discharge both of the above functions
   D. to discharge none of the above functions

3. During the idle period of the battery, strong electrolyte tends to change the active material of the cell into____________?

   A. Pb02
   B. PbSC-4
   C. PbO
   D. Pb

4. During the charging and discharging of a nickel-iron cell____________?

   A. corrosive fumes are produced
   B. water is neither formed nor absorbed
   C. nickel hydroxide remains unsplit
   D. its e.m.f. remains constant

5. As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its__________?

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

6. The best indication about the state of charge on a lead-acid battery is given by____________?

   A. output voltage
   B. temperature of electrolyte
   C. specific gravity of electrolyte
   D. none of the above

7. The capacity of a battery is expressed in terms of____________?

   A. current rating
   B. voltage rating
   C. ampere-hour rating
   D. none of the above

8. Battery charging equipment is generally installed______________?

   A. in well ventilated location
   B. in clean and dry place
   C. as near as practical to the battery being charged
   D. in location having all above features

9. ______ of electrolyte indicates the state of charge of the battery

   A. colour
   B. mass
   C. viscosity
   D. specific gravity

10. Charging a sulphated battery at high rate results in___________?

    A. boiling of electrolyte due to gassing
    B. warping of plates
    C. damage to separators, cell caps covers and battery case due to excessive temperature
    D. all above