ACMT Power & Battery Management 2

Question 1

Which feature in macOS allows a MacBook to intelligently manage battery charging to reduce battery aging?

Accepted Answer

Optimized Battery Charging

Answer

Optimized Battery Charging learns a user's charging patterns and delays charging past 80% until the Mac predicts it will be needed, reducing time spent at full charge and slowing battery aging.

Question 2

What does Power Nap allow a MacBook to do while in sleep mode?

Accepted Answer

Periodically wake to receive emails, calendar updates, and perform Time Machine backups

Answer

Power Nap allows a MacBook to silently wake from sleep to fetch Mail, Calendars, Reminders, iCloud updates, and run Time Machine backups without fully waking the system.

Question 3

When replacing a MacBook battery, why is it important to follow Apple's battery recalibration or verification process after installation?

Accepted Answer

To ensure the SMC correctly reads the new battery's capacity and cycle count for accurate status reporting

Answer

The SMC reads battery authentication data and capacity information; running the proper post-replacement verification ensures accurate battery health reporting and confirms the battery is genuine.

Question 4

A MacBook charges very slowly or not at all when connected to a USB-C charger. What is the first step a technician should take?

Accepted Answer

Test with a known-good Apple-branded USB-C power adapter and cable of the correct wattage

Answer

Testing with a verified, known-good Apple-branded adapter of the correct wattage rules out a faulty charger or cable before investigating the Mac's charging hardware.

Question 5

What wattage USB-C charger does Apple recommend for the 14-inch MacBook Pro to enable full charging performance?

Accepted Answer

96W or higher (96W USB-C or 140W MagSafe 3)

Answer

Apple recommends at least a 96W USB-C power adapter for the 14-inch MacBook Pro to support full-speed charging; the 140W MagSafe 3 adapter is also compatible and recommended for fast charging.

ACMT - Apple Certified Macintosh Technician Practice Test

ACMT - Apple Certified Macintosh Technician Practice Test

ACMT Power & Battery Management 2