Traffic Signal Technician Level II (Latest 2024 / 2025 Update) Questions and Verified Answers | Grade A | 100% Correct
Question:
Check for proper operating DC voltage, check for the absence of red on a phase that does not have green, yellow, or walk, check on a simultaneous are functions that are provided by both -
Answer:
CMU and MMU
Question:
What is the purpose of relays in a traffic signal system?
Answer:
to transfer the outputs from one component to another
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Question:
What device minimizes the amount of voltage that might be available at a pedestrian push button should the button malfunction?
Answer:
Isolator
Question:
Which of the following combinations would cause the signal to enter flashing mode according to NEMA?
Answer:
green & yellow yellow & red walk & yellow
Question:
What feature is included in the 170 or 2070 monitors vs. the NEMA monitor?
Answer:
plug in
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Question:
Which group of features best describes why malfunction monitoring units are more advanced then conflict monitors?
Answer:
ethernet connections monitoring SDLC communications RS-232 communications port
Question:
Which type of power supply lines are attached from the power supply (service) inside the power panel?-120 v, 40 H, single phase, AC+ and AC-
- 120 v, 60 H, single phase DC+ and DC-
- 120 v, 60 H, single phase AC+ and AC-
- 240 v, 60 H, single phase AC+ and AC-
Answer:
120 v, 60H, single phase, AC+ and AC-
Question:
What is NOT an improved feature of the NEMA TS-2 power supply, when compared to the NEMA TS-1 power supply?
Answer:
24 V DC power for solar panels 3 / 4
Question:
At what time can a mercury contactor be disposed of in a typical trash collection receptacle?
Answer:
it can never happen
Question:
List what is a part of the permanent emergency generator system?
Answer:
uninterrupted supply of power direct connection to the power supply panel external fuel source
Question:
What is a direct current (DC)?
Answer:
an electrical current that has a unidirectional flow of electric charge
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