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20 Cards in this Set

  • Front
  • Back
1) Control bus batteries are not used to supply electrical power to operate ---
A) circuit breakers
B) emergency pumps
C) emergency lighting systems
D) transformer cooling fans
D) transformer cooling fans
2) The dry cell battery is a ---
A) secondary cell
B) polarized cell
C) primary cell
D) voltaic cell
C) primary cell
3) One essential differences between primary and secondary cells lies in the fact that ---
A) a primary cell can be recharged
B) a primary cell is always larger
C) a secondary cell produces less power
D) a secondary cell can be recharged
D) a secondary cell can be recharged
4) The plates of a lead-acid battery are made of ---
A) lead and lead peroxide
B) peroxide and lead sulphate
C) lead and lead dioxide
D) lead and lead oxide
A) lead and lead peroxide
5) A battery is receiving a normal charge. It begins to gas freely. The charging current should ---
A) be increased
B) be decreased
C) be cut off and the battery allowed to cool
D) remain the same
B) be decreased
6) The number of negative plates in a lead-acid cell is ---
A) one greater than the number of positive plates
B) equal to the number of positive plates
C) one less than the number of positive plates
D) double the number of positive plates
A) one greater than the number of positive plates
7) A battery hydrometer reading is 1.206 at 92 degrees F.
The corrected reading is ---
A) 1.211
B) 1.201
C) 1.221
D) 1.191
A) 1.211
8) The floating charge of a battery refers to ---
A) the charge given when the hydrometer bulb floats on the electrolyte
B) a charge that is given periodically
C) the charging rate in amps when the current just balances the current required by the external load plus the internal losses of the battery
D) the floating charge of ions in the electrolyte
C) the charging rate in amps when the current just balances the current required by the external load plus the internal losses of the battery
9) It is harmful to leave a lead-acid battery in a discharged condition for a long period before being recharged because ---
A) the battery will gas and may explode
B) the plates will dissolve
C) a hard lead sulphate will form on the places thereby reducing battery capacity
D) all of the above
C) a hard lead sulphate will form on the places thereby reducing battery capacity
10) A control bus battery is on charge. A rapid increase in the rate of gassing indicates the ---
A) cell voltages are approaching 2 volts
B) specific gravity of electrolyte is approaching 1.280
C) charging rate should be lowered
D) battery needs water
C) charging rate should be lowered
11) The proper method of mixing battery electrolyte from concentrated acid in order to prevent a serious explosion from occurring is to ---
A) slowly pour the acid into the distilled water while stirring the contents
B) rapidly pour the distilled water into the acid while stirring the contents
C) rapidly pour equal quanities of distilled water and acid together simultaneously
D) pour the distilled water into the acid without stirring the contents
A) slowly pour the acid into the distilled water while stirring the contents
12) The positive plate of a fully-charged lead-acid battery cell is composed of ---
A) lead peroxide
B) lead sulphate
C) sponge lead
D) lead chlorate
A) lead peroxide
13) The negative plate of a fully-charged lead-acid battery cell is composed of ---
A) lead peroxide
B) lead sulphate
C) lead chlorate
D) sponge lead
D) sponge lead
14) A dry cell may contain all of the below materials except ---
A) manganese dioxide
B) granulated carbon
C) plaster of paris
D) lead peroxide
D) lead peroxide
15) In installing cathodic protection for an underground piping system the DC source is connected in the following manner --
A) the positive lead is grounded near the pipe and the negative lead is connected to the pipe
B) the cathode is to ground and the anode is connected to the pipe
C) both the anode and cathode are grounded on each side of the pipe
D) any one of these connections may be used if means is provided for varying the potential
A) the positive lead is grounded near the pipe and the negative lead is connected to the pipe
16) When a battery cell electrode becomes almost completely coated with gas bubbles, the condition is referred to as ---
A) electolysis
B) polarization
C) gassing
D) amalgamation
B) polarization
17) Battery cell life can be reduced by impurities in the electrodes which causes ---
A) acid attack
B) neutralization
C) local action
D) severe gassing
C) local action
18) The best time to add water to a control bus battery is -
A) when discharged
B) when fully charged
C) just before complete discharge
D) just before the end of charge
D) just before the end of charge
19) Considering zinc, lead, copper and gold, the metal which is least subject to electrolytic corrosion is ---
A) copper
B) gold
C) zinc
D) lead
B) gold
20) The chemical equation which expresses the charging chemical action in a lead-acid storage battery is ---
A) PbSO4 + H2O - 2Pb + 2PbO2 + 2H2SO4
B) 2PbSO4 + H2) -
D)