Download CT V7 Antenna Installation D Exam and more Exams Technology in PDF only on Docsity!
Question 1. Which Connecticut regulation must be checked before installing an antenna on a residential rooftop? A) Local zoning ordinance B) Federal Aviation Administration rules C) OSHA scaffold safety D) FCC license application Answer: A Explanation: Local zoning ordinances can restrict or allow antenna installation; always check these before starting work. Question 2. According to the NEC, what is the main reason for grounding an antenna mast? A) To improve signal strength
B) To prevent corrosion C) To protect against lightning strikes D) To stabilize the mast Answer: C Explanation: Grounding protects the building and occupants from lightning strikes. Question 3. What does OTARD stand for in FCC regulations? A) Over-the-Air Reception Devices B) Outdoor Transmission and Reception Devices C) Operational Television Antenna Regulation Division D) Overhead Transmission and Antenna Regulation Directive Answer: A
Question 5. Which of these is a potential electrical hazard during antenna installation? A) Using a plastic mast B) Running cables parallel to power lines C) Installing the antenna at night D) Using a stainless steel bracket Answer: B Explanation: Running cables parallel to power lines increases the risk of induced voltage and electrical shock. Question 6. The National Electrical Code requires the antenna mast to be grounded using: A) 18 AWG copper wire B) 10 AWG copper wire
C) 22 AWG aluminum wire D) Any available metal wire Answer: B Explanation: NEC specifies a minimum 10 AWG copper wire for grounding masts. Question 7. What is the primary purpose of a lightning arrestor in an antenna system? A) Boost signal strength B) Block radio interference C) Protect equipment from lightning-induced surges D) Reduce wind load Answer: C
A) Narrow frequency range B) High directivity C) Wide frequency range D) Lightweight design Answer: C Explanation: Log-periodic antennas operate over a broad range of frequencies. Question 10. Which characteristic is most important for a TV antenna installed in a rural area? A) High gain B) Small size C) Omnidirectional pattern
D) Low profile Answer: A Explanation: High-gain antennas improve reception of distant signals common in rural areas. Question 11. What happens to signal strength as coaxial cable length increases? A) It increases B) It stays the same C) It decreases D) It fluctuates randomly Answer: C Explanation: Longer cables have more attenuation, reducing signal strength.
B) Ensuring cable and device impedances are equal C) Increasing voltage D) Decreasing frequency Answer: B Explanation: Impedance matching minimizes signal loss and reflections. Question 14. The frequency of a radio signal is measured in: A) Volts B) Ohms C) Hertz D) Watts Answer: C Explanation: Frequency is measured in hertz (Hz).
Question 15. What is the main role of a low-noise block downconverter (LNB) in a satellite system? A) Convert digital signals to analog B) Convert high-frequency signals to lower frequencies C) Amplify audio signals D) Block unwanted signals Answer: B Explanation: The LNB converts satellite signals to a lower frequency for transmission via coaxial cable. Question 16. Which antenna type is best for receiving signals from multiple directions? A) Yagi-Uda
Answer: C Explanation: Metal objects can cause reflection and interference, degrading signal quality. Question 18. When mounting an antenna on a chimney, which is most important? A) Using plastic straps B) Ensuring the chimney is structurally sound C) Painting the antenna D) Using the tallest mast possible Answer: B Explanation: Only mount antennas on stable, undamaged chimneys to prevent collapse.
Question 19. In antenna installation, what does LOS stand for? A) Level of Support B) Line of Sight C) Loss of Signal D) Length of Span Answer: B Explanation: Line of Sight is crucial for good signal reception. Question 20. What is the minimum safe working distance from overhead power lines according to OSHA? A) 3 feet B) 6 feet C) 10 feet
Question 22. Which device can help distribute antenna signals to multiple TVs? A) Diplexer B) Signal splitter C) Modulator D) Demodulator Answer: B Explanation: Signal splitters divide the signal for distribution. Question 23. What is dB a measure of in antenna systems? A) Distance B) Signal strength ratio
C) Cable length D) Voltage Answer: B Explanation: dB (decibels) measure the ratio of signal strengths. Question 24. What is a common cause of multipath interference in antenna systems? A) Direct LOS B) Reflected signals from nearby structures C) High frequency operation D) Using RG-11 cable Answer: B
A) Multimeter B) Oscilloscope C) Signal level meter D) Frequency counter Answer: C Explanation: Signal level meters measure signal strength directly. Question 27. What is the primary function of a signal amplifier in an antenna system? A) Block interference B) Increase signal strength C) Shorten cable length D) Decrease antenna height
Answer: B Explanation: Amplifiers boost weak signals before distribution. Question 28. What is the best practice when routing coaxial cable outdoors? A) Leave it loose B) Staple it tightly C) Secure and protect it from physical damage D) Run it under the roof shingles Answer: C Explanation: Proper securing and protection prevent damage and signal loss.
