A-6 Electrical ASE Test Preparation   


Red Kap Automotive Mechanics Clothing

Automotive Batteries

 
1. Battery electrolyte is a mixture of water and:
Lead peroxide.
Sulfuric acid.
Lead sulfate.
All of the above

 

2. The plates of a discharged battery are?

Two similar metals in the presence of an electrolyte.
Two similar metals in the presence of water.
Two dissimilar metals in the presence of an electrolyte.
Two dissimilar metals in the presence of water.

 

3. Which of the following is true of a 12-volt automobile battery?

It has six cells connected in series.
It has three cells connected in series.
It has six cells connected in parallel.
It has three cells connected in parallel.

 

4. The correct ratio of water to sulfuric acid in battery electrolyte is approximately:

80 percent water to 20 percent sulfuric acid.
65 percent water to 35 percent sulfuric acid.
35 percent water to 65 percent sulfuric acid.
20 percent water to 80 percent sulfuric acid.

 

5. A specific gravity of 1.170 to 1.190 at 80° F indicates that a battery's state of charge is approximately:

75%
50%
25%
10%.

 

6. Each cell of a fully charged six cell battery produces:

1.75 volts
4.2 volts
1.2 volts
2.1 volts

 

7. The capacity of a battery is determined by its:

number of plates.
size of plates.
both a and b.
neither a nor.

 

8. Battery corrosion may be cleaned with:

water.
a solution of baking soda and water.
water and baking flower.
kerosene.

 

9. To check for a battery drain, you would connect an ammeter between the:

battery and alternator.
battery (+) and (-) terminals.
battery (+) terminal and ground cable.
battery (-) terminal and ground cable.

 

10. In order to properly and accurately perform Heavy Load tests on batteries, the battery must be at least:

50% charged.
25% charged.
100% charged.
75% charged.

 

11. When performing a battery capacity (heavy-load) test on a 12-volt battery, the voltage should not fall below

12.0 volts.
10.6 volts.
9.6 volts.
8.6 volts.

 

12. A battery heavy-load test discharges the battery for:

5 seconds.
10 seconds.
15 seconds.
20 seconds.

 

13. The state of charge of a sealed battery is to be estimated based on its open-circuit voltage. A full-charged battery that has been standing for a few hours will have an open-circuit voltage of at least:

12.6 volts.
12.2 volts.
11.5 volts.
9.6 volts.

 

14. A 400-CCA battery is being load tested. The correct load will be:

1200 amps.
400 amps.
200 amps.
330 amps.

 

15. What is the reading on the DVOM when performing an open circuit voltage test on battery with a 50% charge:

 

 

12.0 volts.
12.2 volts.
12.4 volts.
12.6 volts

 

16. A battery that is undercharged for a long period of time will become:

cycled.
overheated.
sulfated.
none of the above.

 

17. To determine if a battery with cell vent covers is charged or discharged, a technician would use a:

hydrometer.
ammeter.
load tester.
none of the above.

 

18. What would be the proper action to take with a battery that showed the following specific gravity readings with the electrolyte at 80 degrees f:

Cell 1: 1.270
Cell 2: 1.260
Cell 3: 1.245
Cell 4: 1.190
Cell 5: 1.250
Cell 6: 1.260

load test the battery.
charge the battery.
replace the battery.
perform a 3-minute charge test.

 

19. The tester that discharges the battery at a high rate to determine its capacity is a:

hydrometer.
ammeter.
load tester.
none of the above.

 

20. What would be the proper action to take with a battery that showed the following specific gravity readings with the electrolyte at 80 degrees f.

Cell 1: 1.265
Cell 2: 1.250
Cell 3: 1.245
Cell 4: 1.260
Cell 5: 1.245
Cell 6: 1.250

load test the battery.
charge the battery.
replace the battery.
perform a 3-minute charge test.

 

21. A maintenance free battery has an open circuit voltage of 12.6 volts and a load (capacity) test of 8.9 volts. Which of the following should be done:

replace the battery.
recharge and retest the battery.
reinstall the battery, battery is sufficient.
none of the above.

 

22. What test is being performed in the illustration below:

Heavy Load Test.
Starter Draw Test.
Battery Cable Voltage Drop.
Charging System Output Check.

 

23. When using a Midtronics Battery Tester shown below. To properly test the battery the state of charge:

must be at least 50% charged.
must indicate an open circuit voltage of at least 5.5 volts.
should indicate an open circuit voltage not be less than 9.6 volts.
must be at least 75% charge.

 

24. A Midtronics Battery Tester will:

load test the battery like a VAT-40 or other battery load testers.
perform a battery draw test to determine the condition of the battery.
tests the conductance of the battery (the ability of the battery to produce current).
only test the state of charge of the battery.

 

25. A battery is being repeatedly and severely discharged before it is recharged. Technician A says that this deep cycling shortens battery life. Technician B says that this will have no effect of battery life. Who is correct?

technician A.
technician B.
both technicians A and B.
neither technicians A or B.

 

26. An AC Delco battery with a built in hydrometer is being checked. Technician A says that a DARK GREEN eye indicates the battery is sufficiently charged for further testing. Technician B says that a CLEAR hydrometer eye means the battery must be replaced.

technician A.
technician B.
both technicians A and B.
neither technicians A or B.

 

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