EGSA Battery and Starting Systems 2

Question 1

A battery charger for a standby generator is typically sized at what percentage of the battery's amp-hour (Ah) capacity?

Accepted Answer

5% to 10%

Answer

1% to 3%

Answer

15% to 25%

Answer

30% to 50%

Question 2

What hazardous gas is produced during the charging of flooded lead-acid batteries that requires adequate ventilation?

Accepted Answer

Hydrogen

Answer

Carbon dioxide

Answer

Nitrogen oxide

Answer

Sulfur dioxide

Question 3

What is thermal runaway in a VRLA battery, and what typically triggers it?

Accepted Answer

A self-reinforcing condition where increasing temperature causes increasing current, leading to battery destruction

Answer

Normal heat produced during engine cranking that dissipates after starting

Answer

The process of a battery warming up to optimal operating temperature in cold weather

Answer

Overheating of the charging cables due to excessive resistance

Question 4

How does low ambient temperature affect a lead-acid battery's available capacity?

Accepted Answer

Capacity decreases significantly as temperature drops below 32°F (0°C)

Answer

Capacity increases proportionally with decreased temperature

Answer

Capacity remains constant regardless of temperature

Answer

Capacity increases slightly then drops sharply below −20°F

Question 5

What instrument is used to measure the specific gravity of electrolyte in a flooded lead-acid battery?

Accepted Answer

Hydrometer

Answer

Multimeter

Answer

Clamp-on ammeter

Answer

Ohmmeter

Question 6

According to NFPA 110, what is the maximum allowable crank cycle time for Level 1 emergency power supply systems before the starting system must rest?

Accepted Answer

15 seconds crank, 15 seconds rest, up to 3 attempts

Answer

5 seconds crank, 5 seconds rest, up to 3 attempts

Answer

30 seconds crank, 30 seconds rest, up to 3 attempts

Answer

60 seconds continuous cranking before lockout

Question 7

What is the purpose of a battery capacity test (load test) on a standby generator battery?

Accepted Answer

To verify the battery can deliver rated current for the required duration and confirm it is not degraded

Answer

To measure the float charging voltage under no-load conditions

Answer

To determine the exact amp-hour rating as labeled by the manufacturer

Answer

To balance electrolyte levels across all cells simultaneously