Phase transformer - Study guides, Class notes & Summaries

NEIEP 400 Final Exam Version 2 (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A Q: What is the result of connecting an ammeter to the terminals of a power supply or other voltage source? Answer: The meter will be damaged. Q: What is correct regarding the transformer? Answer: applied voltage on the primary leads current by 90 degrees Q: What does two solid lines between two coils represent in a transformer?- Answer: Iron core transform...

Level 2 Module 1 Alternating Currents 2:1 What is the step-down turns ratio of a transformer with 200 turns in the primary and 100 turns in the secondary? induced high voltage Opening the secondary of a CT under load will cause a dangerous level of___. 40Hz What is the hertz rating of an AC circuit if the frequency is 20 cycles per 1/2 second? 340V Given: A circuit has an rms voltage of 120VAC. What is the peak-to-peak voltage? 175V A circuit has a peak voltage of 275V....

Traffic Signal Technician Level II (Latest 2024 / 2025 Update) Questions and Verified Answers | Grade A | 100% Correct Q: 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 Q: What is the purpose of relays in a traffic signal system? Answer: to transfer the outputs from one component to another Q: What device minimizes the amount of voltage ...

Electrician NCCER Test Questions and Answers Latest Updated 2024/2025 | Graded. What is a dropout plate? Metal plate with a curve surface for cable to follow as it passes from the tray All of the following are common service voltages in the United States Except: 372/575 3- Phase, 4-wire What does a GFCI breaker do? Opens a circuit to prevent operation of an electrical device What will happen when one or more coils in a winding are grounded? The motor will automatically blow fuses eight in...

NETA III 2023-2024 Exam Questions with Correct Answers The alternate source for emergency systems are required to be equipped with ground-fault protection of equipment. - ANSWER False Which ANSI/IEEE standard covers SF6 circuit breakers? - ANSWER C37.04 You measure the winding resistance of a 12.4kV, 1000kVA, Delta-Delta connected transformer with a 100A test set. H1-H2 measures 42.0 microhms, H2-H3 measures 41.9 microhms, and H3-H1 measures 84.0 microhms. What can you conclud...

An EXCITER on a traditional generator does what? - correct answer Voltage regulation (AVR) if you change the excitation current, you change the voltage. ECO Min, ECO Max, and EMERG Max are genrator _________________. - correct answer Limits When synchronizing to the interconnection, what needs to be synchronized? - correct answer Frequency, Voltage, and phase angle. GMD (GeoMagnetic Disturbance) procedure is implemented when? - correct answer 10A or greater is measured by specia...

NETA III 2024 QUESTIONS WITH CORRECT SOLUTIONS The alternate source for emergency systems are required to be equipped with ground-fault protection of equipment. -Answer-False Which ANSI/IEEE standard covers SF6 circuit breakers? -Answer-C37.04 You measure the winding resistance of a 12.4kV, 1000kVA, Delta-Delta connected transformer with a 100A test set. H1-H2 measures 42.0 microhms, H2-H3 measures 41.9 microhms, and H3- H1 measures 84.0 microhms. What can you conclude from these readings...

Which of the following is true with regard to switchboards Switchboards are used to subdivide large blocks of power When installing wiring within switchgear, use self adhesive cable ties every ___. 12" (300mm) The maximum voltage that a piece of equipment can withstand is known as its ____. Basic impulse insulation level (BIL) Bolted pressure switches are often used in place of ___. Circuit breakers A transformer's temperature rise rating refers to ___. The max...

1. A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave. What sheave is required?: Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave 2. A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do?: Replace it with a larger MOV 3. On a Ward-Leonard circuit the break is set, but the motor is trying to slip through the break. What is the issue?: Suicide Circuit 4. You have an old DC ...

NEIEP 700 FINAL Exam Questions And Answers 100 % Correct straight line wiring diagram - ANS What types of wiring diagrams are most commonly used in circuit tracing answers calls sequentially in the direction of travel - ANS which of the following describes selective collective elevator control function switch to A-, red lead to 10A jack, black lead to com jack - ANS which of the following statements correctly describes how to measure AC Current An SCR - ANS what does the symb...