Practice Test Geeks(CMT) Certified Mobile Tech Practice Test
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CMT Accessories & Peripheral Devices Flashcards

6 cards from real CMT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 CMT Accessories & Peripheral Devices flashcards as text

  1. What is the purpose of a UV sanitizing device marketed for mobile phones?

    Answer: UV-C light kills surface bacteria and viruses on the device exterior without using liquids that could damage the phone

    UV-C sanitizers reduce surface microbial contamination, which is relevant given how frequently phones are handled.

  2. When a customer asks about an external battery pack (power bank), which specification MOST affects charging speed for their phone?

    Answer: The power bank's output wattage and whether it supports the phone's fast-charge protocol (e.g., USB-PD, Qualcomm Quick Charge)

    Protocol compatibility between the power bank output and device input determines whether fast charging is actually achieved.

  3. A customer's phone consistently overheats when using a particular case. What is the most likely cause?

    Answer: The case insulates the device and traps heat generated during processing or charging, preventing normal thermal dissipation

    Smartphones rely on convective heat loss through the chassis; poorly ventilated cases reduce thermal dissipation.

  4. What is the purpose of an OTG (On-The-Go) adapter for Android devices?

    Answer: It allows the phone to act as a USB host, enabling connection of flash drives, keyboards, and other USB peripherals

    USB OTG mode switches the device from USB peripheral to USB host, enabling direct peripheral connection.

  5. A customer complains that their phone's screen protector bubbles after a few days. What is the most likely cause?

    Answer: Improper surface cleaning before application or oil/dust trapped beneath the protector during installation

    Contamination trapped during installation is the primary cause of bubbling; proper cleaning prevents this issue.

  6. What does 'IP68' rating mean for a mobile device?

    Answer: The device is dust-tight and can be submerged in water up to 1.5 meters for 30 minutes under manufacturer test conditions

    IP68 is an IEC standard: '6' means dust-tight and '8' means submersion beyond 1 meter under controlled conditions.