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?
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Correct Answer:
Tensile strength
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What is tensile strength?
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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?
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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?
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Correct Answer:
Allow you to select different power levels from the transformer.
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What is the scan rate?
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Correct Answer:
The frequency of occurrence of a display drawing one line of information.
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What is scan conversion?
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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?
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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?
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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?
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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?
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Correct Answer:
The action of the molecules moving apart.
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What is rarefaction?
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Correct Answer:
The action of molecules moving apart.
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What is the most common type of computer memory used by programs?
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Correct Answer:
Random Access Memory (RAM)
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What does RAM stand for?
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Correct Answer:
Random Access Memory
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What is RFI?
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Correct Answer:
Tendency of a radio transmission to interfere with other electronic signals.
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What is radio frequency interference?
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Correct Answer:
The interference of radio frequency energy in audio systems.
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What does RF stand for?
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Correct Answer:
Radio frequency
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One rack unit equals ____ inches.
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One rack unit equals
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Correct Answer:
1.75 inches
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What does "peaking" allow for?
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Correct Answer:
Compensation for high frequency loss in cables
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What does "peaking" mean?
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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?
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Correct Answer:
The highest level of signal strength
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What does PDP stand for?
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Correct Answer:
Plasma Display Panel
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What does PAL stand for?
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Correct Answer:
Phase Alternate Line
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What does an oscilloscope measure?
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Correct Answer:
Electronic signals
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What is an operating system?
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Correct Answer:
A platform that enables software applications to communicate with the CPU.
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What does the word "omni-directional" mean?
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Correct Answer:
Equal sensitivity to sound from nearly all directions
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What does the term "omni-directional" mean?
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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?
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What does Ohm's law define?
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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?
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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?
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Correct Answer:
Eliminates a specific band of frequencies
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What is the metric unit for screen or surface brightness?
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What is the definition of near-field sound?
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Correct Answer:
Sound that has not been colored by room reflections
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What is the other name for near-field sound?
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Correct Answer:
Direct sound
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What is the native resolution?
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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?
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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?
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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?
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Correct Answer:
An electronic device with multiple inputs and outputs
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What is a matrix decoder?
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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?
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Correct Answer:
Produces red, green, and blue from Y, R-Y, and B-Y
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What does a local monitor do?
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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?
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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?
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Correct Answer:
Lenticular
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What is a lavalier?
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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?
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Correct Answer:
A computer network limited to the immediate area
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What is the full form of "LAN"?
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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?
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Correct Answer:
To protect wires in a cable and their shielding
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What is the purpose of a jacket?
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Correct Answer:
To protect wires in a cable and their shielding.
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What is infrared?
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Correct Answer:
A frequency range of light used to send information.
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What is inductive reactance?
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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?
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What is inductance?
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Correct Answer:
The ability of a magnetic field to transfer electrical current on a conductor.
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What is impedance?
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Correct Answer:
Opposition to alternating current measured in ohms
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What does impedance measure?
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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?
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Correct Answer:
To absorb and dissipate heat produced by an electrical component
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What is a heat sink?
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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
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Correct Answer:
Process and combine the signals
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What is HDTV?
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Correct Answer:
High Definition Television
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What are harmonics?
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Correct Answer:
Higher frequency sound waves that blend with the fundamental frequency.
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What is a glass bead screen?
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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?
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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?
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Correct Answer:
A thickness or diameter of a wire.
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What does the word "gauge" mean?
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Correct Answer:
A thickness or diameter of a wire
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What does a gate do?
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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?
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Correct Answer:
Only above a certain setting or threshold.
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What is the definition of "gain" in electronics?
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Correct Answer:
Electronic signal amplification
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What is a fixed matrix?
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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?
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What is fiber optic?
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Correct Answer:
A technology that uses glass or plastic threads or wires to transmit information.
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What is emissive technology?
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Correct Answer:
Any display device that emits light to create an image.
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What does EMI stand for?
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Correct Answer:
Electromagnetic interference
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What is electromagnetic interference (EMI)?
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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?
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Correct Answer:
Electronics Industries Alliance
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What is echo cancellation?
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Correct Answer:
A means of eliminating echo from an audio path
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What is early reflected sound?
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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?
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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?
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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?
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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?
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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?
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Correct Answer:
The result of encoding a higher quality signal into a lower quality form
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What is bandwidth?
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Correct Answer:
A measure of information carrying capacity without distortion.
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What is a band?
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Correct Answer:
A grouping or range of frequencies
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What is the main advantage of a balanced circuit?
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Correct Answer:
Its ability to reject noise.
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What does a balanced circuit mean?
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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?
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Correct Answer:
An electronic device for increasing the strength of electrical signals.
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What is ambient noise?
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Correct Answer:
Sound that is extraneous to the intended, desired, intentional, audio; background noise.
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What is ambient light?
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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?
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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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