CMT CMT Accessories & Peripheral Devices 1 — Questions and Answers
Question 1: What is the difference between MFi-certified and non-certified Lightning accessories?
- MFi-certified accessories meet Apple's performance and safety standards; non-certified may damage the device or not work (Correct answer)
- MFi certification only affects color options
- Non-certified accessories are faster
- MFi certification is purely cosmetic branding
Correct answer: MFi-certified accessories meet Apple's performance and safety standards; non-certified may damage the device or not work
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?
- Whether the phone case is too thick and whether the charger is Qi-certified and compatible with the device (Correct answer)
- Replace the phone battery immediately
- Perform a factory reset
- Check cellular signal strength
Correct answer: Whether the phone case is too thick and whether the charger is Qi-certified and compatible with the device
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?
- A protocol allowing negotiated fast charging at higher voltages and currents over USB-C (Correct answer)
- The physical size of USB-C connectors only
- Data transfer speeds exclusively
- A wireless charging standard
Correct answer: A protocol allowing negotiated fast charging at higher voltages and currents over USB-C
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?
- Interference from other 2.4 GHz devices or distance/obstacles between the headset and phone (Correct answer)
- A damaged headphone jack on the phone
- Incompatible Bluetooth profiles
- A software bug requiring OS reinstall
Correct answer: Interference from other 2.4 GHz devices or distance/obstacles between the headset and phone
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?
- It repels oils from fingerprints, keeping the screen cleaner and maintaining touch sensitivity (Correct answer)
- It adds structural protection against drops
- It improves display brightness
- It blocks UV light to prevent screen burn-in
Correct answer: It repels oils from fingerprints, keeping the screen cleaner and maintaining touch sensitivity
Oleophobic coatings reduce fingerprint smudging and preserve the smooth glide needed for accurate touch input.
Question 6: What is the function of a smart stylus' digitizer compatibility requirement?
- The device's touchscreen digitizer must support the stylus protocol (e.g., Apple Pencil requires ProMotion or compatible display) for pressure sensitivity (Correct answer)
- It only affects Bluetooth pairing
- It is relevant only for Android devices
- It determines the stylus color options
Correct answer: The device's touchscreen digitizer must support the stylus protocol (e.g., Apple Pencil requires ProMotion or compatible display) for pressure sensitivity
Stylus pressure and tilt sensitivity depend on the digitizer hardware in the device, not just the stylus itself.
CMT CMT Accessories & Peripheral Devices 1
What is the difference between MFi-certified and non-certified Lightning accessories?