CTS Exam Prep Questions & Answers, 100% Accurate. Rated A+

CTS Exam Prep Questions & Answers, 100% Accurate. Rated A+ How does screen gain effect an image? - High gain = brighter image and narrow viewing Low gain = dimmer image and wider viewing How does sync effect an image? - Horizontal and vertical sync signals define the edges of an image Viewing Distance - The farthest viewer should be no more than 8x (video), 6x (reading) or 4x (detailed graphics) the height of the screen away. How do you determine screen size? - Distance of farthest viewer/4, 6, or 8 How does contrast effect an image? - Changes black and white levels How does brightness effect an image? - Makes it brighter or darker How do you find the amps needed when only watts are given? - I = P/ What is power measured in? - Watts (Sherlock Holmes) What is current measured in? - Amps (Ants rowing in the current) What is Ohms law? - IVY - I = V/R What is the best mic for a conference room? - This is a stupid question What are three parameters for audio systems? - Loudness, stability, intelligibility How do you find what the aspect ratio is? - AR = W/H How do you know what size screen to specify? - Screen height = Distance of farthest viewer/4 (inspection), 6 (reading), or 8 (video) How do you know how far away the furthest viewer can be based on activity? - Distance = Screen height*4 (inspection), 6 (reading), or 8 (video) How do you know how far away the furthest viewer can be based on text height? - Distance = Text height*150 How do you measure the SPL or voltage change over distance? - DB = 20*Log (old distance/new distance) (Note - Negative is a decrease and positive is an increase) How do you measure the power change over distance? - DB = 10*Log (old distance/new distance) How do you calculate the total impedance of a series loudspeaker circuit? - Total Impedance = Total number of speakers impedance combined How do you calculate the total impedance of a parallel loudspeaker circuit where the ohms are different levels? - Total Impedance = Total number of speakers impedance combined over 1 How do you calculate the total impedance of a parallel loudspeaker circuit? - Total impedance = one speaker's impedance/total number of speakers How do you calculate the heat load? - Calculate total watts in the room * 3.4 (BTU) When you double the distance from the screen, how does that effect brightness? - 75% less brightness When you double the distance from the speaker, how does that effect the SPL? - 6db less How many decibels does the sound need to be above the ambient noise level of a room - 25db What is the difference between indirect and constant speakers? - Constant voltage speakers are used to carry signal over long distances.