Title: Module 3: Battery Testing - Quiz
Course: ASE A6 Battery Service > Section: Module 3: Battery Testing

Q: Before performing a load test, the battery must be at least:
- 25% charged (12.0V)
- 50% charged (12.2V)
- 75% charged (12.4V)
- 100% charged (12.6V)
A: 75% charged (12.4V)
Feedback: A battery must be at least 75% charged (12.4V OCV) before load testing. A discharged battery will fail a load test even if it is healthy.

Q: When performing a load test, the test load should be:
- 25% of the battery's CCA rating
- 50% of the battery's CCA rating
- 75% of the battery's CCA rating
- 100% of the battery's CCA rating
A: 50% of the battery's CCA rating
Feedback: The load test applies 50% of the battery's CCA rating for 15 seconds.

Q: A battery rated at 700 CCA is load tested. The correct test load is:
- 175 amps
- 350 amps
- 525 amps
- 700 amps
A: 350 amps
Feedback: 50% of 700 CCA = 350 amps.

Q: During a load test at 70°F, the voltage must remain above:
- 7.2V
- 8.5V
- 9.6V
- 10.5V
A: 9.6V
Feedback: At 70°F (21°C), the voltage must stay above 9.6V during the 15-second load test to pass.

Q: Technician A says a battery that reads 12.6V OCV is guaranteed to be healthy. Technician B says a battery can read 12.6V and still fail a load test. Who is correct?
- Technician A only
- Technician B only
- Both Technician A and Technician B
- Neither Technician A nor Technician B
A: Technician B only
Feedback: OCV only indicates state of charge, not battery health. A fully charged battery (12.6V) can still fail a load test if plates are sulfated, damaged, or worn.

Q: What is "surface charge" on a battery?
- Corrosion on the terminal posts
- A temporary elevated voltage after recent charging
- Static electricity on the case
- A permanent voltage increase after overcharging
A: A temporary elevated voltage after recent charging
Feedback: Surface charge is a temporary elevated voltage present immediately after charging. It dissipates over 12 hours or can be removed by applying a brief load.

Q: Which method is acceptable for removing surface charge before testing OCV?
- Disconnecting the negative cable for 30 seconds
- Turning on the headlights for 2-3 minutes, then waiting 2 minutes
- Spraying the terminals with water
- Revving the engine to 3,000 RPM
A: Turning on the headlights for 2-3 minutes, then waiting 2 minutes
Feedback: Applying a moderate load (headlights) for 2-3 minutes and then waiting 2 minutes allows the surface charge to dissipate. The alternative is waiting 12 hours.

Q: A conductance tester evaluates a battery by:
- Applying a heavy load and measuring voltage drop
- Measuring specific gravity of the electrolyte
- Sending a small AC signal and measuring internal resistance
- Drawing current at 50% of CCA for 15 seconds
A: Sending a small AC signal and measuring internal resistance
Feedback: A conductance tester sends a small AC signal through the battery and measures internal resistance. Higher resistance indicates degraded plates or electrolyte.

Q: A conductance tester displays "CHARGE AND RETEST." This means:
- The battery has failed and needs replacement
- The battery is too discharged for the tester to evaluate health
- The battery is overcharged and needs to discharge
- The tester cables have poor contact
A: The battery is too discharged for the tester to evaluate health
Feedback: "Charge and retest" means the battery is too low on charge for the tester to determine if it's healthy or failed. Charge it fully and test again.

Q: Which test is considered the industry standard for battery warranty claims?
- Open-circuit voltage test
- Specific gravity test
- Load test
- Conductance test
A: Load test
Feedback: The load test (carbon pile test) remains the industry standard for warranty decisions, though conductance testing is increasingly accepted.

Q: Technician A says a load test should be applied for 30 seconds. Technician B says a load test should be applied for 15 seconds. Who is correct?
- Technician A only
- Technician B only
- Both Technician A and Technician B
- Neither Technician A nor Technician B
A: Technician B only
Feedback: The standard load test duration is 15 seconds. Applying the load for too long can damage the battery and tester.

Q: A battery fails a load test. The correct next step is:
- Replace the battery immediately
- Charge the battery fully, then retest once
- Perform a conductance test instead
- Add water to the cells and retest
A: Charge the battery fully, then retest once
Feedback: A single load test failure requires charging the battery fully and retesting once. If it fails the second time, replace the battery.

Q: At 0°F (-18°C), the minimum acceptable voltage during a load test is:
- 9.6V
- 9.1V
- 8.5V
- 7.2V
A: 8.5V
Feedback: At 0°F, the minimum acceptable voltage drops to 8.5V. At 70°F it is 9.6V. Colder temperatures lower the pass threshold.

Q: Which advantage does conductance testing have over load testing?
- It draws heavier current for a more accurate result
- It can be performed multiple times without waiting for battery recovery
- It works only on flooded batteries
- It requires the battery to be at 100% charge
A: It can be performed multiple times without waiting for battery recovery
Feedback: Conductance testing is non-invasive (no heavy current draw), so it can be repeated immediately. Load testing requires a 2-3 minute recovery period between tests.

Q: A fleet shop needs to screen 40 vehicles for battery health as quickly as possible. Which test method is most practical?
- Open-circuit voltage only
- Carbon pile load test
- Hydrometer specific gravity test
- Conductance test
A: Conductance test
Feedback: Conductance testing provides results in seconds, is non-invasive, requires no recovery time between tests, and can work at various charge states — making it ideal for high-volume fleet screening.