ASE T9 TEST QUESTIONS AND
ANSWERS WITH SOLUTIONS 2024
Battery locations - ANSWER Unless in the engine compartment, need to be covered by a fixed part of a
vehicle of the vehicle or removable cover
What is the surface charge of a fully charged 12v battery? - ANSWER 12.6-12.7v
What should the dashboard voltmeter read? - ANSWER Range between 11 to 15 volts
What should be indicated if the truck is equipped with an ammeter? - ANSWER Should display charge
right after starting, and when lights are in use.
What tool can be used to measure state of charge of a battery ? - ANSWER Hydrometer
What must be done in the event a cable passes through a metal component? - ANSWER Cable needs to
be protected against grounding using acid and waterproof insulation.
What is caused if polarity is reversed on a battery? - ANSWER Damage to diodes will occur.
What does a hydrometer indicate? - ANSWER The ratio of acid to water in the electrolyte for batteries.
What is specific gravity of an electrolyte in a new fully charged battery? - ANSWER 1.260-1.280 @ 80
deg. Fahrenheit.
What temperature will a battery be able to perform at peak performance? - ANSWER 80 degrees
Fahrenheit
What is a way to maintain a battery at 80 degrees Fahrenheit? - ANSWER Battery Heater
What is an indication a battery is no longer serviceable? - ANSWER Wide variations in between cells.
, If wide variations are found in a battery's cells, what first should be done before replacing a battery? -
ANSWER Try and charge battery and test again.
Assuming a battery is at 80 degrees Fahrenheit. What are the state of charge values of specific gravity? -
ANSWER 1.265 - 100% charged
1.225 - 75% charged
1.190 - 50% charged
1.155 - 25% charged
1.120 - discharged
When will a hydrometer give an inaccurate reading? - ANSWER 1) just after adding water
2) directly after charging
How long should you wait to use a hydrometer after filling battery with water? - ANSWER Minimum 1
day or until the vehicle has operated for a while.
How long after charging a battery should you wait to use a hydrometer? - ANSWER At least 15min.
How far should plates in a battery be submerged? - ANSWER 1/2 inch
How can a batteries ability to deliver current under load be tested? - ANSWER High rate discharge or
load test.
How much charge must a battery have to perform a load test? - ANSWER At least 75%, but some load
tester machines can test batteries as low as 25% by adjusting a percent of charge switch.
Because high rate discharge equipment will measure battery voltage while discharging the battery at a
high rate through fixed resistance. What should be adjusted on the machine? - ANSWER Resistance
should be adjusted to 3 times the battery ampere-hour rating.
ANSWERS WITH SOLUTIONS 2024
Battery locations - ANSWER Unless in the engine compartment, need to be covered by a fixed part of a
vehicle of the vehicle or removable cover
What is the surface charge of a fully charged 12v battery? - ANSWER 12.6-12.7v
What should the dashboard voltmeter read? - ANSWER Range between 11 to 15 volts
What should be indicated if the truck is equipped with an ammeter? - ANSWER Should display charge
right after starting, and when lights are in use.
What tool can be used to measure state of charge of a battery ? - ANSWER Hydrometer
What must be done in the event a cable passes through a metal component? - ANSWER Cable needs to
be protected against grounding using acid and waterproof insulation.
What is caused if polarity is reversed on a battery? - ANSWER Damage to diodes will occur.
What does a hydrometer indicate? - ANSWER The ratio of acid to water in the electrolyte for batteries.
What is specific gravity of an electrolyte in a new fully charged battery? - ANSWER 1.260-1.280 @ 80
deg. Fahrenheit.
What temperature will a battery be able to perform at peak performance? - ANSWER 80 degrees
Fahrenheit
What is a way to maintain a battery at 80 degrees Fahrenheit? - ANSWER Battery Heater
What is an indication a battery is no longer serviceable? - ANSWER Wide variations in between cells.
, If wide variations are found in a battery's cells, what first should be done before replacing a battery? -
ANSWER Try and charge battery and test again.
Assuming a battery is at 80 degrees Fahrenheit. What are the state of charge values of specific gravity? -
ANSWER 1.265 - 100% charged
1.225 - 75% charged
1.190 - 50% charged
1.155 - 25% charged
1.120 - discharged
When will a hydrometer give an inaccurate reading? - ANSWER 1) just after adding water
2) directly after charging
How long should you wait to use a hydrometer after filling battery with water? - ANSWER Minimum 1
day or until the vehicle has operated for a while.
How long after charging a battery should you wait to use a hydrometer? - ANSWER At least 15min.
How far should plates in a battery be submerged? - ANSWER 1/2 inch
How can a batteries ability to deliver current under load be tested? - ANSWER High rate discharge or
load test.
How much charge must a battery have to perform a load test? - ANSWER At least 75%, but some load
tester machines can test batteries as low as 25% by adjusting a percent of charge switch.
Because high rate discharge equipment will measure battery voltage while discharging the battery at a
high rate through fixed resistance. What should be adjusted on the machine? - ANSWER Resistance
should be adjusted to 3 times the battery ampere-hour rating.
