10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
These 10 free STS questions are organized by exam domain, so you can see how each part of the Smart Technology Systems blueprint is tested. Reveal the answer and explanation under each question.
During a retrofit, a coworker grasps a damaged 120 V extension cord and cannot let go. Another worker is already calling emergency services. The disconnect controlling that cord is clearly identified, safely accessible, and within your reach. What should you do immediately?
Correct answer: A - Open the identified disconnect to interrupt power to the cord.
The cabling passes its performance tests, but the handover records do not connect outlet identifiers to patch-panel ports. Which TIA standard family specifically addresses the missing administration system?
Correct answer: B - ANSI/TIA-606
A homeowner's phone controls a hub over Wi-Fi, but newly purchased Zigbee-only leak sensors will not enroll, even beside the hub. The hub has Wi-Fi, Ethernet, and Z-Wave radios; its platform accepts supported add-on radio bridges. What is needed to integrate these sensors?
Correct answer: C - Add a compatible Zigbee coordinator supported by the platform.
An 850 nm fiber loss test measures 2.4 dB against a project limit of 1.5 dB. The test reference is valid. An OTDR trace places the dominant loss and reflection at a patch-panel connection, with no other significant events. All optical sources are now disconnected. Which response is warranted first?
Correct answer: A - Inspect, clean, and reinspect the panel connectors; repeat the loss test.
Every pin on a newly terminated Cat 6 link passes a DC-only continuity test: 1 connects to 1, 2 to 2, and so on, with no shorts. A certification tester nevertheless reports severe near-end crosstalk. Which termination fault can produce both results?
Correct answer: D - A split pair
A remote controller requires 22-26 V DC. During operation, the supply terminals measure 24.0 V and the circuit current is 1.5 A. The outgoing and return conductors have a combined resistance of 2.0 ohms. Ignoring other losses, which calculated result and corrective action are justified?
Correct answer: A - 21.0 V; use lower-resistance conductors to bring the controller into range.
All analog telephone outlets in a small office have lost dial tone. With the premises wiring unplugged at the network interface device, a known-good corded phone and cord obtain clear dial tone at the customer test jack. Reconnecting the premises wiring reproduces the fault; no other telephone equipment remains connected. Where should fault isolation continue?
Correct answer: B - The premises wiring and distribution terminations after the test jack
After office hours, Zone A is empty and Zone B is occupied by cleaners. Both rooms are at 25°C. Each zone uses a cooling setpoint of 22°C when occupied and 28°C when empty; its occupancy sensor overrides the building schedule. The zones are independently controlled, with no equipment-protection delay active. What cooling demand should the controller issue?
Correct answer: C - Cool Zone B only
A doorbell transformer's label specifies a 16 V AC secondary. A technician connects a digital multimeter across the secondary terminals, with leads in COM and V/ohms, and reads approximately zero. The display shows DC volts. Before condemning the transformer, the technician should:
Correct answer: D - Select AC volts and repeat the measurement across the same terminals.
At camera-system handover, the homeowner retains the owner account and requests occasional remote configuration help without giving the installer access to live or recorded video. The platform supports separate configuration and video permissions, named accounts, and access expiry. Which installer-access arrangement meets those requirements?
Correct answer: D - An individual, expiring configuration account that cannot view live or recorded video.
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