Free CTS General Technology Test 2 — Questions and Answers
Question 1: Another way to signify an aspect ratio of 4:3 would be:
- 1.25:1
- 1.77:1
- 1.33:1 (Correct answer)
- 1.43:1
Correct answer: 1.33:1
An aspect ratio of 4:3 means that for every 4 units of width, there are 3 units of height. To express this as a ratio to 1, you divide both numbers by the second number (3). Therefore, 4 divided by 3 is approximately 1.33, making the aspect ratio 1.33:1. This conversion is common for comparing different aspect ratios.
Question 2: What is a CCD in a video camera?
- A change coordinated digitizer for optical recognition
- A light-sensitive electronic chip called a charge-coupled device (Correct answer)
- A CCD helps scatter light within the camera prism
- The charge capacitive digitizer helps with image retention in video camera
Correct answer: A light-sensitive electronic chip called a charge-coupled device
A CCD (Charge-Coupled Device) is a crucial component in many video cameras, acting as a light-sensitive electronic chip. It converts incoming light photons into electrical charges, which are then processed to form a digital image. The CCD array captures the visual information, making it fundamental to the camera's ability to record video.
Question 3: Composite video is made:
- by combining the R-Y and B-Y information onto one cable
- by decoding the RGBHV signal
- by combining the luminance and chroma information onto one cable (Correct answer)
- by decoding the Y/C signal
Correct answer: by combining the luminance and chroma information onto one cable
Composite video is an analog video signal format that combines all video information—luminance (brightness) and chrominance (color, or hue and saturation)—into a single signal. This combined signal is then transmitted over a single cable, which can lead to some signal degradation due to the intermingling of information. It was a common standard before the advent of separate component signals.
Question 4: Resistance is:
- The measure of electrical pressure created by moving electrons.
- The flow of electrons through a conductor.
- The opposition to the flow of electrons in Direct Current. (Correct answer)
- The property of a circuit element to resist a change of current flow.
Correct answer: The opposition to the flow of electrons in Direct Current.
Resistance is a fundamental electrical property that quantifies the opposition a material or component presents to the flow of electric current. In a DC circuit, resistance directly impedes the movement of electrons, converting electrical energy into heat. It is measured in Ohms and is a key factor in determining current flow and voltage drop according to Ohm's Law.
Question 5: XLR connectors are:
- Most commonly used with three conductors plus an outer shell that shields the connection and locks with mating connectors. (Correct answer)
- The most popular style of video connector.
- Sometimes called Camera connectors.
- Very similar to a Phoenix connector
Correct answer: Most commonly used with three conductors plus an outer shell that shields the connection and locks with mating connectors.
XLR connectors are widely recognized for their robust design, commonly featuring three pins for balanced audio signals, which helps reduce noise over long cable runs. The outer shell provides shielding against electromagnetic interference, and its locking mechanism ensures a secure and reliable connection, preventing accidental disconnections in professional AV environments.
Question 6: Which pieces of equipment are necessary for testing leads and evaluating an audio signal chain?
- Soldering iron and multimeter
- Spectrum analyzer and oscilloscope
- Signal generator and signal analyzer (Correct answer)
- Network analyzer and power meter
Correct answer: Signal generator and signal analyzer
To thoroughly test leads and evaluate an audio signal chain, a signal generator is used to inject known test tones (e.g., sine waves, pink noise) into the system. A signal analyzer then measures the output at various points, allowing technicians to identify issues like frequency response anomalies, distortion, noise, or impedance mismatches, ensuring optimal audio performance.
Question 7: What typically causes Alien Crosstalk (AXT) in a network system?
- Power surges in the network switch.
- Incorrect termination of RJ-45 connectors.
- High electromagnetic interference (EMI).
- UTP cables are bundled with other low-voltage UTP cables. (Correct answer)
Correct answer: UTP cables are bundled with other low-voltage UTP cables.
Alien Crosstalk (AXT) occurs when electromagnetic interference (EMI) from one cable or cable bundle interferes with the signal in an adjacent, separate cable. This is most commonly observed when unshielded twisted pair (UTP) cables are tightly bundled together over long distances, allowing signals to couple between them and degrade network performance.
Question 8: The biggest disadvantages to using wireless network access are:
- High cost and complexity.
- Limited bandwidth and interference.
- Range, reliability, and security. (Correct answer)
- Vulnerability to physical damage.
Correct answer: Range, reliability, and security.
The biggest disadvantages of wireless network access are limitations in range, potential unreliability due to interference, and inherent security vulnerabilities. Wireless signals can be affected by physical obstacles and other radio frequencies, leading to dropped connections or slower speeds, and require robust security protocols to prevent unauthorized access compared to wired connections.
Question 9: Projectors may use different lamp technologies for different reasons. For a long life without changing the light source, which technology is preferred?
- LED lamp (Correct answer)
- Halogen lamp
- Xenon lamp
- Mercury vapor lamp
Correct answer: LED lamp
LED lamps are the preferred technology for projectors requiring a long life without frequent light source changes. Unlike traditional halogen, xenon, or mercury vapor lamps, LEDs offer significantly longer operational lifespans, often tens of thousands of hours, reducing maintenance costs and downtime while maintaining consistent brightness and color over time.
Question 10: If it has been determined that system operators should be able to identify networked devices by name, ask the network manager whether the network uses which of the following?
- HTTP or FTP
- DNS or WINS (Correct answer)
- TCP or UDP
- IP or MAC
Correct answer: DNS or WINS
DNS (Domain Name System) and WINS (Windows Internet Name Service) are network services that resolve human-readable names to numerical IP addresses. If system operators need to identify networked devices by name instead of just IP addresses, the network manager must confirm that one of these name resolution services is active and properly configured on the network.
Question 11: A quick and accurate means to estimate the dimensions of a commercial space during a site inspection would be to:
- Count the number of ceiling tiles in a drop tile installation (Correct answer)
- Measure the width of the main entrance
- Check the number of electrical outlets
- Count the number of windows
Correct answer: Count the number of ceiling tiles in a drop tile installation
Counting the number of ceiling tiles in a drop tile installation is a quick and accurate method for estimating commercial space dimensions during a site inspection. Standard ceiling tiles typically come in known sizes (e.g., 2x2 feet or 2x4 feet), providing a reliable visual grid to calculate approximate room length and width without needing a tape measure for every dimension.
Free CTS General Technology Test 2
Another way to signify an aspect ratio of 4:3 would be: