CMT CMT Accessories & Peripheral Devices

Question 1

What is the difference between MFi-certified and non-certified Lightning accessories?

Accepted Answer

MFi-certified accessories meet Apple's performance and safety standards; non-certified may damage the device or not work

Answer

Non-MFi accessories can cause battery damage, charging failures, or trigger iOS warnings due to lack of proper authentication chips.

Question 2

A customer reports their wireless charging pad is not charging their phone. What should be checked first?

Accepted Answer

Whether the phone case is too thick and whether the charger is Qi-certified and compatible with the device

Answer

Thick cases and incompatible chargers are the most frequent causes of wireless charging failure.

Question 3

What does the USB Power Delivery (USB-PD) standard define?

Accepted Answer

A protocol allowing negotiated fast charging at higher voltages and currents over USB-C

Answer

USB-PD enables devices and chargers to negotiate optimal voltage and current for faster, safer charging.

Question 4

A Bluetooth headset pairs but produces intermittent audio dropouts. What is the most likely cause?

Accepted Answer

Interference from other 2.4 GHz devices or distance/obstacles between the headset and phone

Answer

Bluetooth 2.4 GHz band interference and physical obstacles are the primary causes of audio dropouts.

Question 5

What is the purpose of a screen protector's oleophobic coating?

Accepted Answer

It repels oils from fingerprints, keeping the screen cleaner and maintaining touch sensitivity

Answer

Oleophobic coatings reduce fingerprint smudging and preserve the smooth glide needed for accurate touch input.

(CMT) Certified Mobile Tech Practice Test