Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Nate's CTS Questions > CTS Questions and Shortcuts > Flashcards

CTS Questions and Shortcuts Flashcards

1
Q

Lighting Inverse Square Law

A

Double distance, intensity decreases by 4 (1/22)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

300MHz - 3GHz is the the _________band?

A

UHF

ultra high frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is refraction in video?

A

bending or changing of the direction of light ray when passing through between material boundaries, such as air and glass.

The refractive index measure the angle of refraction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is dispersion in video?

A

White light through a prism.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

IPv4 is made up of ______x, ________ bit chunks.

A

4, 8

These are called octets.

232 potential IP address (4,294,967,296)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the Noise Rating (NR)?

A

A method used to specify or quantify the background noise levels from ventilation or other sources in an occupied space.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Formula for ANSI lumen rating is:

A

L = SH x SW x AI (average illuminance)

An incident light meter reading in the center of the of each of the 3x3 areas of the grid is needed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Phantom power is supplied equally on both conductors, true or false.

A

True. Because its equal, this will not harm a dynamic mic.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Projection Brightness refers to:

A

black level control.

If too high, black appears gray.

If too low, black is all the same shade.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

(1) Pascal is equivalent to_________ dB?

A

94.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

RS-232:

Distance?

Conductors?

A

50-65’ because unbalanced

pair plus a ground

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Parts above the reference level are____________ and parts below are called_______________.

A

Compression and Rarefraction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is spherical aberration?

A

Light in the edge of a lens leaves at a different angle than light through the center.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is a gateway?

A

This is a router that connects to an outside network.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the Imager?

How many are in a camera?

A

Light hits this after passing through the lens.

Either done by a prism or (3) imagers (RGB) (DLP)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is benchmarking?

A

Examining methods, techniques, and principals from peer organizations and facilities. Basically demos.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Additive Color uses:

Subractive Color uses:

A

Red, green, blue

Red, yellow, blue.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is a router?

A

A device above the switch layer that that routes the packets to the destination IP address.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is a bridge (networking)?

A

This connects two different types of networks.

Ethernet to WAN protocol for instance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Specular Refelction, a mirror type reflection when most of the energy is reflected back in a single direction is known as __________ reflection.

A

Direct.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

The signal strength of a condenser mic is stronger or weaker than a dynamic?

A

Weaker, which is why it needs a pre-amp.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

How many samples per second in a 44.1 kHz CD?

A

44,100

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

The main electric panel distributes power using________ and ___________.

A

Feeders and Distribution Panels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Focal Length

A

Distance between lens and image sensor and subject is in focus, measured in mm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Candela

A

base unit for luminous intensity.

Equal to a wax candle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Frequency and Wavelength are __________ proportional.

A

Inversely. As one gets larger, the other gets smaller. The lowest frequencies have the longest wavelengths.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Foot candle

A

US customary measurement of illuminance.

1 foot candle = 1 lumen/square foot.

1 foot candle = 10.76 lux

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What is the site survey checklist used to do?

A

Obtain general info about a client and site that may be relevant for the AV system design and installation tasks.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Lux

A

The international unit for illuminace. 1 lumen of light spread over 1 square meter.

10.76 lux = 1 foot candle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Video Clock Adjustment Symptom

A

too large or too small.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Video Scan Rates for Digital Video:

For computers:

A

30 +/-

60

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Acoustics cover how sound is ___________, it’s_______________, and _________________.

A

Produced, propogation, and control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Sampling rate determines the signals accuracy with frequency, the precision (amplitude values) is the determined by…

A

Bit depth. the number of possible states increases by 2 to the power of the number of bits. 16 bits = 2 to the 16th power.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

The human hearing frequency range is…

A

20 Hz to 20 kHz (range from 56.6’ to less than 3/4”)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q
A
36
Q

Projection contract refers to:

A

Difference between lightest and darkest areas.

If too low, white appears gray.

If too high, whites appear the same shade.

37
Q

RS-422

Distance?

Conductors?

A

4,000’

Balanced 4 wire

38
Q

Low-impedence is ________ ohms or less while high - impedence is more than _________ ohms.

A

200 ohms or less (some up to 600), more than 25,000 ohms.

39
Q

Color Temp

A

1900K - Candle Light

5400K - Daylight

Ranges from “orange” low to “blue” high.

40
Q

Low impedence mics are _______ ohm or less, sometime up to ________ ohms. High impedence can be __________ohms or more.

A

200, 600 25k

41
Q
A
42
Q

The speed of sound is:

The speed of an electrical signal is:

A

343m/s (1,225’)

90,000 miles per second.

Reason for time algingment and delay!

43
Q

Bit rate is…

A

Measurement of the quantity of information over time in a digital signal stream

44
Q

What is curvature of field?

A

Blurry apperance around edges of projection screens. Resulting from the curved lens.

45
Q

IPv6 use ______x groups of ________.

A

4, octets.

Has 2128 potential address (340,282,366,920,938,463,463,374,607,431,768,211,456)

46
Q

A vs C weight:

A

A - under 85dB

C - over 85dB

47
Q

What is Room criteria (RC)?

A

Metric in quantifying the tonal characteristics of ventilation noise, such as rumble or hiss. Take all components (walls, ceilings, diffusers, etc) as a whole into account.

48
Q

Illuminance

A

the amount of light falling on a surface, measured in lux (lx) or footcandles (fc).

1 foot candle = 10.76 Lux

49
Q

Once approved, what does the AV concept / design / program report become the basis for?

A

this will creat detailed AV design documents and cost estimates.

50
Q

When you sample at 2x the frequency of the signal, you are using….?

A

Nyquist Rate

51
Q

Sound pressure is reduced by ______dB every time the distance from the source is doubled.

A
  1. Also known as the 6 dB per doubling rule.
52
Q

When energy scatters and is reflected, its known as ___________ reflection.

A

Diffuse.

53
Q

The number of times that sine wave cycles per seconds is called the …

A

The frequency, also CPS (cycles per second).

54
Q

The physical distance between 2 points exactly one cycle apart are is the …

A

Wavelength

55
Q

7 layers of the OSI Model

A

7: Application
6. Presentation
5. Session
4. Transport
3. Network
2. Data Link
1. Physical

56
Q

What is a needs analysis?

A

Identifies activities that the end user needs to perform, the develops the functional descriptions of the system that support those needs.

57
Q

The main function of a diversity receiver is to….

A

Compare phase differences between signals to avoid cancellations.

58
Q

Measuring an images bandwidth requires a___________.

A

Spectrum analyzer

59
Q

The output of a device should have an impedence ________% or less the impedence of the input device.

A

1/10th or 10%

60
Q

Equations for Frequency, Wavelength, and Velocity:

A

f = v/L

L= v-f

v = L * f

61
Q

The spectrum of hearing is divided into_________ octave bands, and each band is __________octave.

A

10, 1.

62
Q

30MHz - 300MHz is the the _________band?

A

VHF

Very High Frequency

63
Q

Zigbee:

Distance?

Configuration?

A

100’ Line of Site

Point to point or mesh.

64
Q

MAC address stands for :

A

Media Access Control Address.

Parts of the IEEE 802 standard and uses a 48 bits number with 6 groups of /two hexidecimal numbers.

65
Q

What are the parts of a program reports after a program (needs analysis) meeting(s)?

A
  1. Executive Summary (overview, what facility is, ohw used)
  2. Space Planning (special requirements control, storage, etc)
  3. Systems Descriptions (AV sketches, drawings, diagrams, spec sheets)
  4. Infrastructure Considerations (lighting, electrical, acousstical, network, etc)
  5. AV Budgets (opinion on probable cost, estimate and quotes later)
66
Q

Conversion of energy from one for to another is called…

A

Transduction.

67
Q

Radio Frequency Range?

A

3kHz - 300GHz

68
Q

What are (2) types of imagers?

A

CMOS - complementary metal oxide semiconductors

CCD - Charged coupled device.

69
Q

What does 1:50 on a metric scale mean?

A

1 unit on paper is 50 in the real space.

70
Q

Octave Center Bands:

A
  • 30Hz
  • 60Hz
  • 120Hz
  • 250Hz
  • 500Hz
  • 1kHz
  • 2kHz
  • 4kHz
  • 8kHz
  • 16kHz
71
Q

Video Phase Adjustment Symptoms

A

Phase adjustments are at the pixel level.

Fine detail will be fuzzy.

72
Q

Nit

A

Used for display screens.

Nit = 1 candela per square meter

73
Q

Metric (SI) to US:

A

Meters to Feet = multiply by 3.28084

Centimeters to Inches = multiply by .3937008

Milimeters to Inches = multiply by .03937008

Feet to Meters = multiply by .3048

Inches to Centimeter = mulitply by 2.54

Inches to Millimeters = multiply by 25.4

74
Q

DHCP stands for what?

A

Dynamic Host Configuration Protocol

* an IP address is automatically assigned to the MAC address and is contigent upon the subnet size and number of available addresses.

75
Q

Video Quality…

Passive Viewing:

Basic Decision Making (BDM):

Analytical Decision Making (ADM):

A

Does not require detail or retention

Decisions are made, but detail is not needed. Classrooms, boardrooms, product illustrations.

Decision Based on Details. Medical imaging, engineering prints, forensics.

76
Q

Inverse Square Law - sound energy is inversely proportional to the square of the distance from the source. Ever time distance doubles from the source, the energy spreads and covers ___________x the area it did before.

A

4

77
Q

At what point in the AC power system are the branch circuits that power wall outlets and AV equipment connected?

A

Subsidiary distribution panel (panelboard)

78
Q

Wire vs Cable

A

Wire is a single conductor

79
Q

Aperature of a Lens is________

Measured in________

A

The opening of the lens, regulating amount of light let in.

This is measured in F-stops. The larger the number, the smaller the opening.

80
Q

Generally, a _________measurement of incident light is taken at a task area like a video screen.

A

Lux

81
Q

RS485:

Distance?

Conductors?

A

4,000’

UTP (DMX 512 for instance)

82
Q

a sample rate of 44.1 khz equate to how many frequency samples per second?

(this is a standard CD sample rate)

A

44,100 samples per chanel per second (2 channels for a cd)

83
Q

Bit depth related to a signals ___________ instead of the frequency of the original signal.

A

Amplitude

84
Q

Bit rate (flow of information) is calculated by the multiplying the ________ ______ by the ______ ___________.

A

sample rate and bit depth.

A CD with a sample rate of 44.1 khz and a bit dept of 16 bits per channel:

44,100 x 16 x 2 (2 channels) = 1.411 Mbps

(Mega = 106)

85
Q
A

Nate's CTS Questions (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions