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InfoComm CTS Exam with complete
solution
The measurement of color temperature is expressed in _____. - ANSWER-Kelvin What does a sightline study determine? - ANSWER-The most appropirate seating layout and screen position. In radio frequency transport, the program signal is added to a ____ signal before transportation. - ANSWER-Carrier Which of the following statements describes rear projection technology? - ANSWER-Rear projection displays provide better contrast and color saturation in high ambient light environments than front projection displays. Which of the following statements about automatic mixers in audio applicaitons is true? - ANSWER-They are used for speech applications, such as meetings. A gate function automatically mutes all audio signals that ____. - ANSWER-Fall below a set threshold. A distribution amplifier is used to ____. - ANSWER-Split one input into multiple isolated outputs, each with the same signal level. What is a circuit's bandwidth? - ANSWER-The range of frequencies a circuit can detect.
A string's vibration or loudspeaker cone's movement pushing air molecules forward demonstrates how sound waves are ____. - ANSWER-Generated What unit(s) are used for quantifying resistance and impedance? - ANSWER- Ohms are used for both resistance and impedance. Audio signals may be purposely delayed in sounds reinforcement applications in order to ensure that ____. - ANSWER-Sound will reach all listeners at the same time. Which of the following statements accurately describes unidirectional control communications? - ANSWER-Unidirectional communication does not verify the receipt of commands. If the resolution of an image is increased, the signal bandwidth ____. - ANSWER- Increases If the color temperature is low, the light will appear to be more ____. - ANSWER- Red. What type of waves has the highest frequency in the range of the electromagnetic spectrum? - ANSWER-Ultraviolet If an electronic frequency falls outside of a circuit's bandwidth, that frequency will be ____. - ANSWER-Lost For a video display that requires detailed veiwing, the position of the frarthes viewer should be no more than ____ times the height of the display away from the screen. - ANSWER- A light source's color temperature refers to it's ____. - ANSWER-Tint If the brightness level of a display is too high, the black areas of the image will appear ____. - ANSWER-Gray
Which property of a wave determines the brightness of a light? - ANSWER- Amplitude If the state frequency is 6 MHz, and the end frequency is 18 MHz, what is the bandwidth? - ANSWER-12 MHz In a series circuit, all the current will ____. - ANSWER-Flow through the entire circuit. The R, G, and B video signals in a computer display output are typically ____. - ANSWER-Kept separate in order to preserve quality. What kind of display device has pixels that are filled with a liquid crystal compound? - ANSWER-LCD An individual action within a control system is called a ____. - ANSWER-Function What is depth of field? - ANSWER-The distance between the nearest and farthest objects in focus. What is throw distance? - ANSWER-The distance between the screen and the projector. An audio system's power amplifier should be turned on ____. - ANSWER-After checking the audio signal level at the mixer, but before making adjustments to the microphone preamplifiers. What type of microphone polar pattern picks up sound primarily from the front and some from the rear, but rejects sounds from the sides? - ANSWER-Cardioid A ____ connects different types of networks. - ANSWER-Bridge The quality of digital recordings will _____ as more copies are made. - ANSWER- Remain the same.
What is the primary reason for electrical codes and regulations? - ANSWER-To safeguard persons and property. Lower sensitivity microphones may be used in order to ____. - ANSWER-Capture high sound pressure level sources, such as a singer. As the gain of a screen increases, ____ increases. - ANSWER-Ambient light rejection. Because digital video is transported as a component signal, it is ____ than composite analog video. - ANSWER-Higher quality. How many cables do component videos require to carry signal? - ANSWER-Three The relationship between current and resistance is always ____. - ANSWER- Inversely proportional What is the definition of "frequency"? - ANSWER-The cycle when molecules move from rest through compression to rest to rarefraction. The ____ model is a guide that assists with conforming nextwork communications and their processes to standards. - ANSWER-OSI What is an advantage of lossless compression? - ANSWER-Files can be opened and recompressed repeatedly without data loss. A signal transmitted at the proper level will ____ over distance. - ANSWER- Decrease in signal strength or amplitude. Which of the following statements describes a DC circuit? - ANSWER-Current in a DC circuit flows in one direction only. Light entering the eye first passes through the ____. - ANSWER-Cornea
What is the first step in the AV system creation process? - ANSWER-Wants and needs analysis A diversity receiver uses a pair of antennas to ____. - ANSWER-Select the strongest or most direct RF signal over reflections of the same signal. Which audio signal has a nominal level of 1 volt? - ANSWER-Professional Line Level If the display creates an image by passing light through a medium, what display technology is it using? - ANSWER-Transmissive When does spherical aberration occur? - ANSWER-Light rays pass through the edges of a lens. What is bit rate? - ANSWER-The quantity of information over time in a digital signal. The loudspeakers in a distributed system are located ____. - ANSWER-At regularly spaced intervals throughout teh listening area. How much sound pressure is reduced every time the distance from the source is doubled? - ANSWER-6 dB Which type of loudspeaker is typicall used to reproduce mid to high frequency sounds? - ANSWER-Horn A scene involving fast motion may appear jerky or stuttered if the shutter speed is too ____. - ANSWER-Slow The frequency response specification ____. - ANSWER-Defines the electrical output level over the audible frequency spectrum.
The second conductor of an unbalanced circuit ____. - ANSWER-Is a shield around the wire used as the electrical circuit's return path. What is a macro in a control system? - ANSWER-A group of functions activated by a single control input. What is the purpose of a video matrix decoder? - ANSWER-Converts the luminance, R-Y and B-Y signals into separtate red, blue, and green channels. In order to capture an analog signal accurately, the sampling rate must be at least ____ the frequency. - ANSWER-Twice What do infrared controls require? - ANSWER-A direct line of sight between source and destination. Which part of the camera splits incoming light into red, green, and blue light? - ANSWER-The prism. What does focal length determine? - ANSWER-How much of a scene is visible to the lense. A cable's bend radius is best defined as the ____. - ANSWER-Amount a conductor can be bent before the signal is compromised or the conductor is damaged. What is a mix-minus system? - ANSWER-A sound reinforcement system where each listener hears a mix of the micrphone signals, minus the closest micrphone(s). The Inverse Square Law states that every time the distance ____ from the source of the energy, the energy spreads to cover ____ the previous area. - ANSWER- Doubles; four times
During the site survey, the room appears to have a lot of reverberation present. What treatment could be recommended to improve the sound in the room? - ANSWER-Use more softer, diffuse surfaces After presenting a proposal, what is the correct plan of action for following up with the client? - ANSWER-Regularly, until a decision is made AV professionals determine the end user's needs by examining three things: the required applications, the tasks, and the: - ANSWER-functions to support the application When working with a client to design an AV solution for a new conference center, the client requests a detailed budget for the equipment and installation. What phase is the project in? - ANSWER-Design Phase During discussions with an Architect, ____ may be useful when reviewing drawings. - ANSWER-Scale Rule The HDTV aspect ratio is equal to which of the following? - ANSWER-1.78: Which system is used to show colors in a display? - ANSWER-Additive color system Please select the appropriate resolution for common 4kx2k resolution. - ANSWER- 3840 x 2160 Please select the appropriate resolution for SXGA - ANSWER-1280 x 1024 The foundation of good customer service is built on: - ANSWER-Good customer relationships When collaborating with another vendor on a project, it is advisable to - ANSWER-Inform the client that the project manager is in charge.
Potential AV customers will share their concerns and objections more readily if an AV company: - ANSWER-Already has some idea of what they do and appears to have done some research After hearing the vendors' Request for Proposal (RFP), how do you evaluate the vendor's proposal to determine the best value? - ANSWER-Consider the price, quality, approach, and ability of vendor to fulfill the contract. How is a contract awarded to a vendor after the vendor is determined to be the best value for a project? - ANSWER-Use the RFP and vendor proposal; negotiate items needing clarification with contract clauses The brightness control adjust which level? - ANSWER-Black Level The biggest disadvantage to using wireless network access are: - ANSWER-Range, reliability, and speed and security. What drawback is there when utilizing 5-wire RGBHV in place of a VGA cable? - ANSWER-HDCP and EDID will not pass along RGBHV 5-wire For what purpose would the AV technician designate a loopback internet protocol address in the 127.0.0.1 to 127.255.255.254 range in a network configuration? - ANSWER-To test the local device to see if TCP/IP is working on your system It is important to consider polar patterns when ____. - ANSWER-Selecting Microphones for use a live events What is the best practice for deciding between unbalanced and balanced audio runs? - ANSWER-Use balanced for all runs when possible When training a new user how to operate the solution that has been provided, which of the following is a best practice? - ANSWER-Provide complete user documentation prior to training
A display has a problem with the intensity and hue color information. Which tool should be used to check this? - ANSWER-Vectorscope When terminating a Cat 5e cable with an 8P8C (RJ-45) connector, it is best practice to untwist each wire pair: - ANSWER-As little as possible to get each wire to enter the proper channel in the connector. There is concern about the noise level in an AV rack room. What weight setting on the SPL meter should be used to demonstrate that the noise level doesn't require hearing protection at all times? - ANSWER-A Weighted What should be done if a touch screen control panel is reportedly locked up, frozen or otherwise reported to be not functioning? - ANSWER-Check all connectors; confirm the screen is not in power saver mode A camera was installed about 180' from its 1.5A 12v power supply, the power supply is dead, and needs replacing. Assuming that the camera can operate normally within +/- 10% of the power supply voltage, if the 18 gauge wire was run initially and an almost 3v drop is present, what is the correct action? - ANSWER- Re-locate the power supply near the camera Oscilloscope - ANSWER-Plots signal amplitude and timing Waveform Monitor - ANSWER-Measures amplitude and timing of luminance and color signals Vectorscope - ANSWER-Measures amplitude, hue, and phase of video signals (color is represented by a vector's direction and amplitude. 1 Meter = ____ - ANSWER-3.28 Feet 1 Inch = ____ - ANSWER-2.54 Centimeters
OSI Layer 1 - Physical Layer - ANSWER-Covers cabling and other connection mediums. Defines relationship between device and physical means of sending data over network. Defines optical, electrical, and mechanical characteristics. OSI Layer 2 - Data Link Layer - ANSWER-Includes Ethernet standard and unique hardware addresses. Defines procedures for operating the comm links, encapsulates data, and detects and corrects packet-transmission errors. OSI Layer 3 - Network Layer - ANSWER-IP comes into play. Determines how data is transferred, routes packets according to network device addresses, and provides flow and congestion control to prevent network resource depletion. OSI Layer 4 - Transport Layer - ANSWER-Governs the transfer of data. Provides packet delivery, connection-oriented or connection-less packet delivery, and provides flow and congestion control to prevent network resource depletion. OSI Layer 5 - Session Layer - ANSWER-1st Upper layer and concerns the data itself, ensuring data passes properly through the network. Manages user sessions and dialogues, controls the establishment and termination of connections, and reports upper-layer problems. OSI Layer 6 - Presentation Layer - ANSWER-Unpackages data for use by application layer, makes data format differences between dissimilar systems so they can communicate, specifies an architechture-independent data-transfer format, and encodes/decodes data, encrypts/decrypts data, and compresses/decompresses data. OSI Layer 7 - Application Layer - ANSWER-presents data to the application software for use, defines an interface to user processes for communication and data transfer, and provides standardized services. Focal Length - ANSWER-Distance light must travel after it passes through the optical center of a lens
OC - ANSWER-on center OD - ANSWER-Outer diameter OFCI - ANSWER-Owner furnished, contractor installed OFE - ANSWER-Owner furnished equipment OFOI - ANSWER-Owner furnished, owner installed PM - ANSWER-Project Manager RCP - ANSWER-Reflected Ceiling Plan SECT - ANSWER-Section VIF - ANSWER-Verify in field
