CSLB C-7 Low Voltage Systems (Trade Exam) — All Questions
17 questions
Which TIA standard must field test equipment conform to under the federal cabling specification?
- a.ANSI/TIA-569
- b.ANSI/TIA-1152✓
- c.ANSI/TIA-607
- d.ANSI/TIA-606
The specification requires test equipment to conform to ANSI/TIA-1152, the field-tester standard. TIA-606 covers administration and labeling, TIA-607 covers bonding and grounding, and TIA-569 covers pathways and spaces.UFGS 27 10 00 (2025), para. 3.11.1 (telecommunications cabling testing)
Which fiber loss test method does the federal cabling specification require for single-mode links?
- a.A continuity buzzer across the connectors
- b.A visible light pen held at one end
- c.The single jumper method of TIA-526-7✓
- d.An OTDR trace with no reference
The testing method must comply with ANSI/TIA-526-7 using the single jumper method. An OTDR trace is a separate Tier 2 test that does not replace the loss test, and a light pen or a buzzer cannot measure optical loss.UFGS 27 10 00 (2025), para. 3.11.1.2 (verification tests)
What practical advantage of the OTDR does the NIST (NBS) report identify?
- a.It needs no setting for the fiber's group index
- b.It always measures loss more precisely than a power meter
- c.It needs access to only one end of the fiber✓
- d.It works without any light source
The report names the OTDR's principal advantage as requiring access to only one end of the fiber or cable. It does need the group index to convert time to distance, its loss readings can be affected by direction, and it uses its own pulsed light source.NBSIR 87-3078, Calibration and Standardization Issues for the OTDR (NIST)
During visual inspection before testing, what does the federal cabling specification check on cable jackets?
- a.The installer's initials on each jacket
- b.The cable's purchase invoice number
- c.UL or third-party certification markings✓
- d.The jacket color matching the wall paint
The specification calls for visually inspecting UTP and fiber jackets for UL or third-party certification markings, along with deformation and discoloration. Invoice numbers, installer initials and paint matching are not inspection items.UFGS 27 10 00 (2025), para. 3.11.1.1 (inspection)
An inspector finds Category 6A cable terminated on Category 6 jacks at some outlets. What does the federal cabling specification require the inspection to confirm?
- a.Only the cable's category matters
- b.Mixed categories are fine if the tester passes them
- c.Only the patch panel's category matters
- d.All components share one category✓
The inspection confirms that outlets, cover plates, connectors and patch panels all carry the same category marking, so the entire channel is composed of components of the same marking. Checking only the cable or panel misses the mismatch, and the specification makes component matching a requirement in its own right.UFGS 27 10 00 (2025), para. 3.11.1.1 (inspection)
A reel of fiber cable fails attenuation testing. What does the federal cabling specification require?
- a.Remove the failed reel from the site✓
- b.Use it for the shortest runs only
- c.Return it to the owner as attic stock
- d.Keep it on site as spare material
The specification requires failed cable reels to be removed from the project site upon attenuation test failure. Using it on short runs, keeping it as spare, or handing it to the owner all leave failed material in the building's supply.UFGS 27 10 00 (2025), para. 3.11.1 (telecommunications cabling testing)
Before field testing begins on a federal cabling project, who must be notified and invited to witness?
- a.The owner's representative✓
- b.The cable manufacturer's sales office
- c.The local fire marshal
- d.The neighboring tenants
The contracting officer's representative must be notified of the testing start date in advance and invited to witness or review field testing. The manufacturer's sales office, the fire marshal and neighboring tenants are not named in the testing procedure.UFGS 27 10 00 (2025), para. 3.11.1.2 (verification tests)
After the contractor's test report is submitted, what portion of the cabling plant does the federal criterion's test plan have retested with the owner's quality-assurance representative?
- a.1 percent
- b.25 percent
- c.100 percent
- d.5 percent✓
The test plan includes subsequent testing of 5 percent of the cabling plant with the owner's QA representative to verify the contractor's quality control. One percent and 25 percent are not the stated sample, and 100 percent is what the contractor tests, not the QA sample.UFC 3-580-01 (2024), para. 2-6.5 (test plan)
On a federal communications project, whose approval must the contractor's test plan and test report carry before submission?
- a.The local building inspector
- b.The cable manufacturer
- c.The contractor's RCDD✓
- d.The project's electrician
The criterion requires the contractor's Registered Communications Distribution Designer (RCDD) to approve both the test plan and the test report before submission. The building inspector, the manufacturer and the electrician are not given that role in the criterion.UFC 3-580-01 (2024), para. 2-6.5 (test plan)
Besides pass/fail status, what must the test summary spreadsheet include for failed links under the federal criterion?
- a.The installer's hourly rate
- b.The cable's purchase price
- c.The tester's serial number only
- d.The causes for failures✓
The summary includes room numbers, outlet and jack labels, pass/fail status and causes for failures, with totals installed, passed and failed. Labor rates and purchase prices are not test data, and a serial number alone says nothing about why a link failed.UFC 3-580-01 (2024), para. 2-6.5 (test plan)
When does the federal HVAC controls specification schedule owner training?
- a.Within 30 days after the performance verification test✓
- b.When the owner requests it in writing later
- c.At the end of the warranty period
- d.Before any controls are installed
The specification conducts training at the project site within 30 days after successful completion of the performance verification test. Training before installation has nothing to show, waiting to the end of the warranty leaves staff untrained, and training is a contract requirement rather than an optional later request.UFGS 23 09 00, Instrumentation and Control for HVAC (training)
What must the training manuals contain under the federal HVAC controls specification?
- a.The as-built drawings
- b.Agenda, objectives, lesson content✓
- c.The warranty certificate
- d.The contractor's marketing brochure
Training manuals include an agenda, defined objectives for each lesson and a detailed description of the subject matter of each lesson. A brochure, drawings alone or a warranty certificate do not teach operation and maintenance.UFGS 23 09 00, Instrumentation and Control for HVAC (training documentation)
What does the federal cabling specification require of the organizations that support installed equipment during the warranty period?
- a.They must be the original installer
- b.They must be reasonably convenient to the site✓
- c.They must be located in the same building
- d.They must be overseas manufacturer offices
Equipment must be supported by service organizations reasonably convenient to the installation, to give regular and emergency service during the warranty. Same-building, original-installer-only and overseas offices are not the requirement and the last would defeat timely service.UFGS 27 10 00 (2025), para. 1.9 (warranty)
How are final labels verified under the federal cabling specification?
- a.By the owner after occupancy
- b.During testing, against the records✓
- c.On a random 5 percent sample
- d.They are not verified once printed
Final labeling must be verified as part of testing and certified as accurate per record documentation. Waiting for the owner, sampling only 5 percent, or skipping verification all leave label errors in the system.UFGS 27 10 00 (2025), para. 3.11.1.2 (verification tests)
How does the federal public address specification measure the system's signal-to-noise ratio?
- a.Play music at full volume and listen
- b.Disconnect all speakers and read the amplifier meter
- c.Use a 1,000 Hz generator in place of a mic✓
- d.Measure resistance across each speaker line
The specification disconnects a microphone, substitutes a signal generator at 1,000 Hz, loads the other microphone inputs with dummy loads and measures signal-to-noise at normal gain settings. Listening to music is not a measurement, an unloaded amplifier meter does not measure system noise, and line resistance is a wiring check.UFGS 27 51 16, Public Address Systems (testing requirements)
What reference test jumpers does the federal cabling specification require for fiber loss testing?
- a.Cords with the same loss as the link under test
- b.Bare fiber ends with no connectors
- c.A patch cord from the job's spare stock
- d.Reference-grade jumpers with very low loss✓
Reference-grade connectors with very low attenuation (bracketed in the specification as 0.10 dB for multimode and 0.20 dB for single-mode) are required, so the reference adds as little uncertainty as possible. Spare job cords and cords matching the link's loss would distort the measurement, and bare fibers cannot be referenced repeatably.UFGS 27 10 00 (2025), para. 3.11.1.2 (verification tests)
What record does the federal cabling specification require for each installed cable?
- a.The installer's daily time sheet
- b.A copy of the cable's sales receipt
- c.A TIA-606 cable record✓
- d.A photo of the cable box label
The specification requires a record of installed cable in accordance with ANSI/TIA-606, with the required data fields, plus termination hardware records. A box photo, a time sheet or a sales receipt do not identify where each cable runs and terminates.UFGS 27 10 00 (2025), para. 1.11.2 (record documentation)