Basic RF Characteristics

CWT · 45 questions

• A parks Wi-Fi technician notices two SSIDs on different bands and asks what frequency actually means for the RF wave the AP transmits. Which statement is correct?
• A city library AP shows strong signal, but a volunteer asks whether louder Wi-Fi means higher frequency. Which RF characteristic actually describes that stronger, louder magnitude?
• Two identical municipal APs are mounted with different cable runs, and a technician wonders whether phase matters when those signals combine at a client. What does phase describe?
• A facilities crew asks why a 2.4 GHz signal can often travel farther than a higher-band signal in free-space discussion. Which relationship should the technician emphasize?
• In a municipal warehouse with metal racks, a technician must name which RF property describes how many wave cycles occur per second. Which property is that?
• An installer reads a spectrum note about a weak carrier on a city hall AP and must identify which characteristic describes the wave's height or power magnitude. Which choice is correct?
• During a simple municipal mesh discussion, staff confuse wavelength with channel width. How should the technician define wavelength?
• A help-desk script for the civic center tells staff to 'fix the phase on the AP GUI.' What should a CWTS-level technician conclude?
• A design document specifies a directional antenna for a long municipal courtyard link. How should the technician explain antenna gain?
• Wi-Fi near a glass curtain wall at city hall behaves oddly, with coverage appearing in unexpected directions. Which RF behavior best matches RF bouncing off that smooth surface?
• A signal path at the city aquarium crosses thick glass and water tanks. Which RF behavior describes the wave bending as it enters a medium with different density?
• Rough concrete columns in a municipal parking garage break up the Wi-Fi wave. Which RF behavior describes RF dispersing in many directions off uneven surfaces?
• Drywall barely hurts a civic office AP, but a foil-backed insulation wall nearly kills coverage through that wall. Which RF behavior best explains the energy loss in the foil-backed material?
• An outdoor municipal point-to-point note cites free space path loss as distance increases with no obstacles between radios. What does free space path loss describe?
• A supervisor uses 'air attenuation' and 'free space path loss' interchangeably during a parks wireless review. How should the technician separate the ideas at CWTS depth?
• A courtyard AP aims through decorative metal mesh at a municipal plaza. Which RF behavior is most associated with many small dispersals rather than one mirror-like bounce?
• Coverage behind a hill of earth fill near a water-treatment plant is dead. Staff debate reflection versus absorption as the main reason soil blocks the link. Which conclusion fits technician RF basics?
• A high-gain antenna improves downlink to a distant municipal IoT gateway. What does that gain change at CWTS depth?
• A PoE switch UI shows a city AP radio power as milliwatts. What kind of RF power measurement is the milliwatt?
• A municipal WLAN design says 'reduce power by 3 dB.' What does that instruction express?
• A client at the county clerk's office reports −65 dBm. How should the technician interpret dBm?
• Voice quality on a municipal inspection tablet drops when noise rises even though RSSI still looks acceptable. Which power relationship best explains the problem?
• An installer treats a 6 dB increase as only a tiny linear bump on a civic AP. What should the technician remember about dB at this depth?
• A spreadsheet for library APs lists both 100 mW and 20 dBm for the same radio setting. What should the technician conclude?
• A spectrum note for a transit shelter AP shows the noise floor rising 10 dB while the desired signal stays constant. What happens to SNR?
• A municipal vendor datasheet lists an AP's EIRP in dBm. How should a city WLAN technician interpret that value?
• Comparing two courthouse APs, design notes say one is "3 dB hotter" than the other. What does that relative language mean?
• A help ticket for a library laptop shows only "signal 70%," while a second survey tool reports dBm at the same desk. Which measurement should the technician prefer when comparing results across vendors?
• Two inspection laptops from different vendors report different RSSI numbers while sitting in the same city-hall lobby seat. What should the technician conclude?
• A parks-and-rec survey app shows −72 dBm at a kiosk. How should the technician treat that reading?
• A meter-reader's phone Wi-Fi meter jumps from 40% to 80% after stepping closer to a public-works AP. What is the sound interpretation of that percentage change?
• A county WLAN standard requires documenting client signal in dBm rather than signal bars. Why is that requirement reasonable for a technician?
• After a clerk moves closer to a city-hall AP, both the percentage meter and the dBm reading improve. What performance relationship should the technician keep in mind?
• A library WLAN design document lists channel 36 for an indoor AP. What does that channel number represent for the technician?
• One museum AP is set to 80 MHz while a neighboring AP uses 20 MHz. What does channel width primarily describe?
• Monitoring in a busy courthouse lobby shows high channel utilization even though client RSSI looks acceptable. What should the technician understand?
• Staff ask a city WLAN technician to set "the widest channel everywhere" for maximum speed. What caution belongs in the reply?
• A 2.4 GHz IoT SSID for water-meter gateways overlaps neighboring city APs on adjacent center frequencies. What technician action matches good channel practice?
• Monitoring at a records counter shows low RSSI but also low channel utilization. How should the technician separate those findings?
• An indoor office AP in a municipal building uses internal antennas per the design. What does that typically indicate for the installer?
• A USB client dongle for a permitting kiosk has a small external stub antenna, while staff phones have no visible antenna. What client-antenna fact should the technician recall?
• An outdoor bridge between two fire-station buildings needs low-loss cable and correct connectors between the radio and antenna. Why do cables and connectors matter?
• A hallway patch antenna is specified for a clinic corridor. What does passive antenna gain mean in that design?
• Design forbids omitting RP-SMA weatherproofing on an outdoor AP at a water-treatment plant. Why should the installer care about connector sealing?
• Replacing an omnidirectional AP antenna with a higher-gain directional antenna for a municipal warehouse aisle changes coverage. What tradeoff should the technician expect from higher passive gain?