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Audio Visual System Design MCQ

What is the throw distance?

Answer

Correct Answer: The length of the projection beam necessary for a particular projector to produce an image of a specified size.

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What is the term for the maximum force that a material can withstand before deforming or stretching?

Answer

Correct Answer: Tensile strength

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What is tensile strength?

Answer

Correct Answer: The maximum force that a material can withstand before deforming or stretching.

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What is the purpose of taps on a transformer?

Answer

Correct Answer: To allow you to select different power levels from the transformer

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What do the taps on a transformer do?

Answer

Correct Answer: Allow you to select different power levels from the transformer.

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What is the scan rate?

Answer

Correct Answer: The frequency of occurrence of a display drawing one line of information.

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What is scan conversion?

Answer

Correct Answer: The process of changing the horizontal scan rate of one device to that of another.

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What is satellite television?

Answer

Correct Answer: Entertainment or business video and audio transmitted via a satellite.

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How is the digital signal created from the analog signal?

Answer

Correct Answer: Sampling rate – how many samples of the analog signal are taken in a given time interval

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What does sampling rate refer to?

Answer

Correct Answer: How many samples of the analog signal are taken in a given time interval in creating the digital signal

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What is the meaning of rarefaction?

Answer

Correct Answer: The action of the molecules moving apart.

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What is rarefaction?

Answer

Correct Answer: The action of molecules moving apart.

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What is the most common type of computer memory used by programs?

Answer

Correct Answer: Random Access Memory (RAM)

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What does RAM stand for?

Answer

Correct Answer: Random Access Memory

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What is RFI?

Answer

Correct Answer: Tendency of a radio transmission to interfere with other electronic signals.

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What is radio frequency interference?

Answer

Correct Answer: The interference of radio frequency energy in audio systems.

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What does RF stand for?

Answer

Correct Answer: Radio frequency

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One rack unit equals ____ inches.

Answer

Correct Answer: 1.75

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One rack unit equals

Answer

Correct Answer: 1.75 inches

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What does "peaking" allow for?

Answer

Correct Answer: Compensation for high frequency loss in cables

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What does "peaking" mean?

Answer

Correct Answer: An adjustment method that allows compensation for high frequency loss in cables.

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What does "peak" refer to in the context of signal strength?

Answer

Correct Answer: The highest level of signal strength

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What does PDP stand for?

Answer

Correct Answer: Plasma Display Panel

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What does PAL stand for?

Answer

Correct Answer: Phase Alternate Line

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What does an oscilloscope measure?

Answer

Correct Answer: Electronic signals

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What is an operating system?

Answer

Correct Answer: A platform that enables software applications to communicate with the CPU.

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What does the word "omni-directional" mean?

Answer

Correct Answer: Equal sensitivity to sound from nearly all directions

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What does the term "omni-directional" mean?

Answer

Correct Answer: A microphone with equal sensitivity to sound from nearly all directions.

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What is the formula for Ohm's Law?

Answer

Correct Answer: I = V/R

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What does Ohm's law define?

Answer

Correct Answer: The relationship between current, voltage, and resistance in an electrical circuit.

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The relationship of the frequencies in an octave is such that the lowest frequency is...?

Answer

Correct Answer: Half the highest

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What is the relationship of the frequencies in an octave?

Answer

Correct Answer: The lowest frequency is half the highest.

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NTSC stands for ____________.

Answer

Correct Answer: National Television System Committee

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What does a notch filter do?

Answer

Correct Answer: Eliminates a specific band of frequencies

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What is the metric unit for screen or surface brightness?

Answer

Correct Answer: Nit

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What is the definition of near-field sound?

Answer

Correct Answer: Sound that has not been colored by room reflections

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What is the other name for near-field sound?

Answer

Correct Answer: Direct sound

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What is the native resolution?

Answer

Correct Answer: The number rows of horizontal and vertical pixels that create the picture

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Native resolution describes the _______ of the delivery signal.

Answer

Correct Answer: Actual resolution of the imaging device

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What is a media retrieval system?

Answer

Correct Answer: A system in a facility that allows for remote requests of content to be delivered from a head-end location.

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Which type of television system is MATV?

Answer

Correct Answer: Master Antenna Television system

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A matte white screen is used in order to ____________.

Answer

Correct Answer: Evenly disperse light 240 degrees uniformly, both horizontally and vertically, creating a wide viewing cone and wide viewing angle

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What does a matte white screen do?

Answer

Correct Answer: Evenly disperses light 240 degrees uniformly, both horizontally and vertically, creating a wide viewing cone and wide viewing angle.

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What is a matrix switcher?

Answer

Correct Answer: An electronic device with multiple inputs and outputs

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What is a matrix decoder?

Answer

Correct Answer: A device that produces red, green, and blue from Y, R-Y, and B-Y

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What does a matrix decoder do?

Answer

Correct Answer: Produces red, green, and blue from Y, R-Y, and B-Y

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What does a local monitor do?

Answer

Correct Answer: Monitors the output of a signal from a system or other device in a local vicinity

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What is the key difference between a limiter and a compressor?

Answer

Correct Answer: Signals exceeding the threshold level are reduced at ratios of 10:1 or greater.

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What is designed to reflect maximum light over wide horizontal and narrow vertical angles?

Answer

Correct Answer: Lenticular

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What is a lavalier?

Answer

Correct Answer: A small microphone designed to be worn either around the neck or clipped to apparel.

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What is a LAN?

Answer

Correct Answer: A computer network limited to the immediate area

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What is the full form of "LAN"?

Answer

Correct Answer: Local area network

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What is the trapezoidal distortion of a square-cornered image called?

Answer

Correct Answer: Keystone error

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What is the definition of a junction box?

Answer

Correct Answer: A portable set terminal for power cables.

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What is the jacket in a cable used for?

Answer

Correct Answer: To protect wires in a cable and their shielding

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What is the purpose of a jacket?

Answer

Correct Answer: To protect wires in a cable and their shielding.

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What is infrared?

Answer

Correct Answer: A frequency range of light used to send information.

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What is inductive reactance?

Answer

Correct Answer: The opposition to the flow of alternating current by the inductance of a circuit, measured in ohms.

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What is the unit of measurement for inductive reactance?

Answer

Correct Answer: Ohms

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What is inductance?

Answer

Correct Answer: The ability of a magnetic field to transfer electrical current on a conductor.

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What is impedance?

Answer

Correct Answer: Opposition to alternating current measured in ohms

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What does impedance measure?

Answer

Correct Answer: Opposition to alternating current

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What does IEEE stand for?

Answer

Correct Answer: The Institute of Electrical and Electronics Engineers

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What is the hemispheric polar pattern?

Answer

Correct Answer: The dome shape of the region that some microphones will be most sensitive to sound.

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Which of the following best describes a hemispheric polar pattern?

Answer

Correct Answer: The dome shape of the region that some microphones will be most sensitive to sound

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What is the purpose of a heat sink?

Answer

Correct Answer: To absorb and dissipate heat produced by an electrical component

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What is a heat sink?

Answer

Correct Answer: A device that absorbs and dissipates heat produced by an electrical component.

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Process and combine the signals at the headend of the cable distribution system

Answer

Correct Answer: Process and combine the signals

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What is HDTV?

Answer

Correct Answer: High Definition Television

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What are harmonics?

Answer

Correct Answer: Higher frequency sound waves that blend with the fundamental frequency.

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What is a glass bead screen?

Answer

Correct Answer: A screen covered with tiny glass beads, each of which provides a spherically reflective surface.

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What does the term "genlock" mean?

Answer

Correct Answer: To lock the synchronization signals of multiple devices to a single source

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What does the term "auge" refer to?

Answer

Correct Answer: A thickness or diameter of a wire.

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What does the word "gauge" mean?

Answer

Correct Answer: A thickness or diameter of a wire

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What does a gate do?

Answer

Correct Answer: It allows signals to pass only above a certain setting or threshold.

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What does the audio processor gate allow signals to pass?

Answer

Correct Answer: Only above a certain setting or threshold.

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What is the definition of "gain" in electronics?

Answer

Correct Answer: Electronic signal amplification

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What is a fixed matrix?

Answer

Correct Answer: A type of display that has a fixed grid on which it recreates an image.

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What does a filter do?

Answer

Correct Answer: Remove or pass certain frequencies from a signal

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What is contained in each standard video frame?

Answer

Correct Answer: Two interlaced fields

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How many fields are in a standard video frame?

Answer

Correct Answer: Two

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What is fiber optic?

Answer

Correct Answer: A technology that uses glass or plastic threads or wires to transmit information.

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What is emissive technology?

Answer

Correct Answer: Any display device that emits light to create an image.

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What does EMI stand for?

Answer

Correct Answer: Electromagnetic interference

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What is electromagnetic interference (EMI)?

Answer

Correct Answer: An electrical disturbance caused by an electromagnetic field, either low frequency or radio frequency (RF)

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What is the full form for EMI?

Answer

Correct Answer: Electromagnetic interference

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What does EIA stand for?

Answer

Correct Answer: Electronics Industries Alliance

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What is echo cancellation?

Answer

Correct Answer: A means of eliminating echo from an audio path

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What is early reflected sound?

Answer

Correct Answer: Sound waves which are reflected (bounced) off surfaces between the source and the listener

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What does a delay do to an audio signal?

Answer

Correct Answer: Retards the speed of transmission

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What does a deflection coil do?

Answer

Correct Answer: Direct an electron beam to draw an image on a cathode ray tube

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What does decibel measure?

Answer

Correct Answer: A comparison of two measurements or values

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What does 0 dBSPL equal to?

Answer

Correct Answer: 0.0002 dynes/cm2

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Which of the following is NOT true about dBSPL?

Answer

Correct Answer: Its reference, 0 dBSPL equals 0.0002 dynes/cm2.

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What is the D-sub connector?

Answer

Correct Answer: A generic name for D-shaped serial connectors used in data communications.

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What is a carrier?

Answer

Correct Answer: A modulated frequency that carries a video or audio signal.

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What does the word "carrier" mean in the context of audio and video signals?

Answer

Correct Answer: A modulated frequency that carries an audio or video signal

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Which of the following shapes is a cardioid?

Answer

Correct Answer: Heart-shaped

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How does one terminate a captive screw connector?

Answer

Correct Answer: Strip and slide a wire into a slot on the connector

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What is the name of the screws that are used to hold the wires in place in a captive screw connector?

Answer

Correct Answer: Set screws

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What does capacitance refer to?

Answer

Correct Answer: The ability of a nonconductive material to develop an electrical charge which can distort an electrical signal.

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What is baseband?

Answer

Correct Answer: Video signal that has not been modulated

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What is bandwidth limiting?

Answer

Correct Answer: The result of encoding a higher quality signal into a lower quality form

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What is bandwidth?

Answer

Correct Answer: A measure of information carrying capacity without distortion.

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What is a band?

Answer

Correct Answer: A grouping or range of frequencies

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What is the main advantage of a balanced circuit?

Answer

Correct Answer: Its ability to reject noise.

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What does a balanced circuit mean?

Answer

Correct Answer: A circuit in which two branches are electrically alike and symmetrical with respect to a common reference point

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What is an amplifier?

Answer

Correct Answer: An electronic device for increasing the strength of electrical signals.

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What is ambient noise?

Answer

Correct Answer: Sound that is extraneous to the intended, desired, intentional, audio; background noise.

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What is ambient light?

Answer

Correct Answer: All light in a viewing room produced by sources other than the display.

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What is the name given to an electric current that reverses its direction periodically?

Answer

Correct Answer: Alternating current

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What does AES stand for?

Answer

Correct Answer: Audio Engineering Society.

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What is the study of sound wave behavior in air called?

Answer

Correct Answer: Acoustics

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