Transformers Study guides, Class notes & Summaries
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AQA GCSE COMBINED SCIENCE: TRILOGY 8464/P/1H Higher Tier Physics Paper 1H Question Paper + Mark scheme [MERGED] June 2022 *jun228464p1h01* IB/M/Jun22/E13 8464/P/1H For Examiner’s Use Question Mark
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AQA 
GCSE 
COMBINED SCIENCE: TRILOGY 
8464/P/1H 
Higher Tier 
Physics Paper 1H 
Question Paper + Mark scheme [MERGED] 
June 2022 
*junp1h01* 
IB/M/Jun22/E13 8464/P/1H 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
TOTAL 
Time allowed: 1 hour 15 minutes 
Materials 
For this paper you must have: 
• a ruler 
• a scientific calculator 
• the Physics Equations Sheet (enclosed). 
Instructions 
• Use black ink or black ball-point pen. 
• Pencil should be used for drawing. 
• Fill i...
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LML4806 PORTFOLIO MEMO - MAY/JUNE 2023 - SEMESTER 1 - UNISA (DETAILED MEMO - DISTINCTION GUARANTEED!)
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LML4806 PORTFOLIO MEMO - MAY/JUNE 2023 - SEMESTER 1 - UNISA (DETAILED MEMO - DISTINCTION GUARANTEED!) 
 
QUESTION 1 
 
1.1	The Memorandum of Incorporation of Generators Unlimited (Pty) Ltd provides that only the board of directors, or any director authorised by the board, has the power to conclude contracts on behalf of the company. It also states that any transaction that exceeds R10 million must first be authorised by the company’s shareholders at a general meeting by way of an ordinary reso...
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NEIEP 400 Final Exam Version 2 (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A
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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...
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NEIEP 400 Final Exam Version 1 (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A
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NEIEP 400 Final Exam Version 1 (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A 
 
 
Q: What is the power available from a 68 kVA transformer connected in open delta configuration ? 
 
Answer: 
 39.44 kVA 
 
 
Q: The secondary winding of an 11,000 volt to 220 volt transformer has 50 windings on the secondary How many turns are on the primary winding 
? 
 
Answer: 
 2500 turns 
 
 
Q: A transformer has 728 turns on the primary winding and 56 turns on the secondary ...
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NERC TOP System Operations EXAM Questions and Answers (Download To Score An A)
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At what torque angle of operation does power typically begin to flow from the generator to the system? A) 90 degrees B) 60 degrees C) 30 degrees D) 10 degrees 10 degrees Choose the answer that best describes the operation of a rotor. A) The stationary part of the transmission system. B) A type of superconductor. C) The stationary element of a generator that has its windings connected to the system. D) The excited (energized) field winding that rotates inside the stator to induce current into the...
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CEFP Practice Exam| 370 Questions| Correct Solutions| 100% Accurate!!
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desired level of maintenance - ANSWERSprior to scheduling work priorities must be set after assigning standards regarding the 
 
Use Proper Equipment - ANSWERSa major way to dramatically reduce the labor required for grounds maintenance procedures is to 
 
20% - ANSWERSwhat is the ideal percentage of staffing desired for a project and relief crew 
 
the materials amounts exceed certain threshold limits - ANSWERSthe presence of some materials can require continuous reporting if 
 
polychlorinated...
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203 TRANSFORMERS AND AC CIRCUITS WITH SOLUTIONS
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A(n) __________ is a graph showing how an electrical value changes over a period of time. 
WAVEFORM Ref: 1.09 
 
 
 
The ac waveform is called a(n) __________ wave. 
SINE Ref: 1.14 
 
 
 
Frequency is the number of __________ an electrical system goes through in a unit of __________. 
CYCLES; TIME Ref: 1.19 
 
 
 
In what unit is frequency measured? 
HERTZ (Hz) Ref: 1.20 
 
 
 
The number of cycles generated in one complete revolution of an alternator equals half the number of __________. 
POLES...
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TFM 12 Fire Alarm Technical Test with 100% Correct Answers REVISED & VERIFIED 2023//2024
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TFM 12 Fire Alarm 
Technical Test with 
100% Correct Answers 
REVISED & VERIFIED 
2023//2024 
Does a fire hood system and a kitchen need to be monitored by the fire alarm system? - 
ANSWER Yes 
What does P.L.F.A stand for? - ANSWER Power Limited Fire Alarm 
What does N.P.L.F.A stand for? - ANSWER Non-Power Limited Fire Alarm 
What is the difference between P.F.L.A and N.P.F.L.A? - ANSWER an N.P.L.F.A can 
operate at up to 600v, and the power output isn't limited 
a P.L.F.A has the voltage ...
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NCCER LEVEL 3 Module 7 Exam 2023 With 100% Correct Answers
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Conductors connected to the high leg of a four-wire delta system be color-coed with what color of insulation or tape? -correct answer -Orange (NEC Section 110.15) 
 
Dry-type transformers rated at 112.5kVA or less may be located out in the open provided they are separated from combustible material by a distance of ____. -correct answer -12" 
 
If the power factor is improved by the addition of a capacitor, the motor running overcurrent device must be selected based on the ___. -correct answer -...
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TFM12 Test with 100% Correct Answers REVISED & VERIFIED 2023//2024
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TFM12 Test with 
100% Correct Answers 
REVISED & VERIFIED 
2023//2024 
What is used to protect transformers or other devices supplied from power-supply 
conductors? - ANSWER A. An overcurrent device not rated over 20 Amperes. 
What does PLFA stand for? - ANSWER Power Limited Fire Alarm 
What does NPLFA stand for? - ANSWER Non-Power Limited Fire Alarm 
What material must NPLFA circuit conductors be made from? - ANSWER Solid or 
stranded copper 
What is a single station detector? - ANSWER Batt...
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APT4801 ASSIGNMENT 6 2023 (TEST NO 6)
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APT4801 Assignment 6 2023 (TEST NO 6) 100% TRUSTED workings, explanations and solutions. For assistance call or whatsapp us on +25479 811 9845 . 
QUESTION 1 [22] 
Three-zone mho relays are used for transmission line protection of the power system shown in figure 1 
The line impedances are 
Line 1 – 2: j60 
Line 2 – 3: j40 
Line 2 – 4: j70 
The rated voltage for the HV buses is 400 kV. The CT and VT ratios at B12 are 2 000/1 and 3 600/1, 
respectively. 
Figure 1 power netwo...
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