Practice Test Geeks(VDV) Voice Data Video Technician Certified Practice Test
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Audio/Video Systems Installation Flashcards

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

Read the first 7 Audio/Video Systems Installation flashcards as text

  1. Which tool is used to verify that an HDMI cable will support 4K/60Hz signals before installation in a finished wall?

    Answer: HDMI signal tester/verifier

    An HDMI signal tester verifies that the cable can carry 4K/60Hz by checking bandwidth, HDCP handshake, and signal integrity.

  2. What is the purpose of a ground loop isolator in an audio system?

    Answer: To eliminate the 60Hz hum caused by different ground potentials between equipment

    A ground loop isolator uses a transformer to break the DC path between two pieces of equipment, eliminating hum caused by ground potential differences.

  3. A rack is running hot and equipment is shutting down due to thermal protection. What is the FIRST corrective action a technician should take?

    Answer: Add a rack-mount exhaust fan and verify adequate front-to-back airflow

    Installing a rack exhaust fan and ensuring proper front-to-back airflow is the most immediate and effective solution for rack thermal issues.

  4. When installing a home theater surround sound system, what is the recommended placement angle for surround speakers relative to the primary listening position?

    Answer: 90 to 110 degrees to the side

    Dolby and DTS recommend placing 5.1 surround speakers at 90–110 degrees to the sides of the listening position for optimal envelopment.

  5. What does 'signal-to-noise ratio' (SNR) measure in an audio system?

    Answer: The level of the desired signal compared to the level of background noise

    SNR measures how much stronger the desired audio signal is compared to the unwanted noise floor, expressed in decibels (dB).

  6. Which type of video cable uses a threaded locking connector and is the professional broadcast standard for HD-SDI signals?

    Answer: BNC coaxial

    BNC connectors are the standard for SDI and HD-SDI coaxial video cables in professional broadcast and AV installations due to their secure locking mechanism.

  7. A technician is installing a projection screen and needs to calculate the correct screen size. The room is 24 feet deep and the farthest viewer is at 20 feet. Using the 2H rule, what is the minimum recommended screen height?

    Answer: 10 feet

    The 2H rule states the farthest viewer should be no more than 2 times the screen height away, so 20 feet ÷ 2 = 10 feet minimum screen height.