commercial vehicle batteries ch14

1. Consider three 12-volt 500 CCA batteries connected in series. What is the available voltage and amperage of the combined batteries?

• a. 12 volts 1,500 amps

• b. 36 volts 500 amps

• c. 12 volts 500 amps

• d. 24 volts 1,000 amps

2. Technician A says that during charging and discharging, water in the electrolyte is broken apart into its constituent hydrogen and oxygen through a process called electrolysis. Technician B says if battery electrolyte is too low, the plates dry out, and the increased acid concentration of electrolyte permanently damages the grids. Who is correct?

• a. Technician A

• b. Technician B

• c. Both Technician A and Technician B

• d. Neither Technician A nor Technician B

3. Technician A says that battery plates are made of two different compositions of lead that are fabricated from paste and bonded to lead-alloy grids. Technician B says that the negative plate uses lead peroxide (PbO2) and the positive plate uses lead (Pb). Who is correct?

• a. Technician A

• b. Technician B

• c. Both Technician A and Technician B

• d. Neither Technician A nor Technician B

4. An ohmmeter display indicates the resistance of a circuit is 3.2 kÙ. How many ohms of resistance does this equal?

• a. 12 volts

• b. 12.6 volts

• c. 7.3 volts

• d. 12.4 volts

5. Technician A says that the primary difference between deep-cycle batteries and SLI is the thickness of the plates. Technician B says that deeply discharging SLI batteries dramatically shortens their service life. Who is correct?

• a. Technician A

• b. Technician B

• c. Both Technician A and Technician B

• d. Neither Technician A nor Technician B

6. Technician A says that a spiral cell (Optima battery) is not considered a sealed lead-acid (SLA) battery. Technician B says that an absorbed glass mat (AGM) battery is not considered a SLA battery. Who is correct?

• a. Technician A

• b. Technician B

• c. Both Technician A and Technician B

• d. Neither Technician A nor Technician B

7. A battery that is left in a discharged state for a long period of time becomes:

• a. Cycled

• b. Shorted

• c. Sulfated

• d. Overheated

8. Technician A says that a fully charged 12-volt battery is 12 volts. Technician B says that a battery with a 50% state of charge has close to 6 volts when no electrical loads are connected. Who is correct?

• a. Technician A

• b. Technician B

• c. Both Technician A and Technician B

• d. Neither Technician A nor Technician B

9. Battery electrolyte is a mixture of water and:

• a. Sulfate

• b. Lead sulfate

• c. Sulfuric acid

• d. Ammonia

10. Technician A says that the battery case is usually made of polypropylene with ribbing and irregular features to reduce the amount of current leakage across the battery surface. Technician B says that ribbing and irregular features on the outside of the case add to the strength of the battery and make it sturdier. Who is correct?

• a. Technician A

• b. Technician B

• c. Both Technician A and Technician B

• d. Neither Technician A nor Technician B