Transformers Study guides, Class notes & Summaries

The potential difference induced across a coil depends on the number of turns in the coil and on the _________. rate at which the magnetic field changes Which law states that the current in a conductor is proportional to the potential difference across it? Ohm's Law The number of cycles produced in one complete revolution of the rotor in an alternator equals ______ the number of poles. half To find the root mean square, you calculate the square root of the mean of all th...

WA UST Site Assessor Exam Questions and Answers 2023 with complete solution What is the hold time for soil and preserved GW GRO samples? Ans 14 days Is an ICC certification needed to install an AST? Ans No Flammability limits of gasoline Ans 1.4 to 7.6% How many days do you have from a tank closure to report/provide the UST checklist to ECY? Ans 30 days MTCA Method A lead CUL, soil Ans 250 mg/kg MTCA Method A lead CUL, GW Ans 15 ug/L Is the vadose zone saturated or uns...

QUESTION 1 [20] 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 resolution. One of the directors, Nthabiseng, is authorised by the board of directors to conclude con...

MULTIPLE CHOICE 1. The nurse is caring for a patient with suspected right-sided heart failure. Which manifestation best supports this potential diagnosis? a. Wheezing b. Orthopnea c. Edema d. Pallor ANS: C Right-sided heart failure leads to edema from systemic backup. Wheezing, orthopnea, and pallor are indicative of left-sided failure. PTS:1 DIF: Cognitive Level: Comprehension REF: 426, Table 19-2 OBJ:1 (theory) TOP: Heart Failure: Right Side KEY: Nursing Process Step: Assessment...

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...

Inductance - correct answer is the property of the coil of a wire that opposes a change in current in an electromagnetic device False (Len's Law) States - correct answer (True/False) Ohm's Law states that when voltage is initially applied to a coil, the induced voltage opposes the source voltage. Low - correct answer When voltage is initially applied to a coil, current is Counter EMF - correct answer The induced voltage that opposes any change in current is called Greatest - c...

Inductance correct answersis the property of the coil of a wire that opposes a change in current in an electromagnetic device False (Len's Law) States correct answers(True/False) Ohm's Law states that when voltage is initially applied to a coil, the induced voltage opposes the source voltage. Low correct answersWhen voltage is initially applied to a coil, current is Counter EMF correct answersThe induced voltage that opposes any change in current is called Greatest correct answersC...

Does a fire hood system and a kitchen need to be monitored by the fire alarm system? - Yes What does P.L.F.A stand for? - Power Limited Fire Alarm What does N.P.L.F.A stand for? - Non-Power Limited Fire Alarm What is the difference between P.F.L.A and N.P.F.L.A? - 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 and power limited by a listed power source. What material must N.P.F.L.A circuit conductors be made from? - ONLY solid...

WA UST Site Assessor Exam Questions and Answers Graded A What is the hold time for soil and preserved GW GRO samples? 14 days Is an ICC certification needed to install an AST? No Flammability limits of gasoline 1.4 to 7.6% How many days do you have from a tank closure to report/provide the UST checklist to ECY? 30 days MTCA Method A lead CUL, soil 250 mg/kg MTCA Method A lead CUL, GW 15 ug/L Is the vadose zone saturated or unsaturated? Unsaturated List in order of most mobile to least mob...

An is a graph showing how an electrical value changes over a period of time. Waveform The ac waveform is call an wave. Sine Frequency is the number of an electrical system goes through in a unit of . Cycles; Time In what unit is frequency measured? Hertz The number of cycles generated in one complete revolution of an alternator equals half the number of . Poles What is the frequency of the output of a four-pole alternator running at 1800 revolutions per mi...