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1. The power transformer that used to steps the voltage down from transmission levels to distribution levels is called: A) Substation transformer B) Unit transformer D) Potential transformer. C) Distribution transformer ➖➖➖➖➖➖➖➖➖ 2. The primary and secondary windings of an ideal transformer have power factor. A) Higher. C) Same. B) Much lower. D) Lower. 3. Volt-amperes reactive (VAR) is the unit that used to measure the A) Active power. B) Reactive power. C) Real power. D) Apparent power. 4 The portion of the flux that goes through one of the transformer coils but not the other one

1. The power transformer that used to steps the voltage down from transmission levels to distribution levels is called: A) Substation transformer B) Unit transformer D) Potential transformer. C) Distribution transformer ➖➖➖➖➖➖➖➖➖ 2. The primary and secondary windings of an ideal transformer have power factor. A) Higher. C) Same. B) Much lower. D) Lower. 3. Volt-amperes reactive (VAR) is the unit that used to measure the A) Active power. B) Reactive power. C) Real power. D) Apparent power. 4 The portion of the flux that goes through one of the transformer coils but not the other one

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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1. The power transformer that used to steps the voltage down from transmission levels to distribution levels is called: A) Substation transformer C) Distribution transformer B) Unit transformer D) Potential transformer. 2. The primary and secondary windings of an ideal transformer have power factor. A) Higher. B) Much lower. D) Lower. C) Same. 3. Volt-amperes reactive (VAR) is the unit that used to measure the A) Active power. B) Reactive power. C) Real power. D) Apparent power. 4. The portion of the flux that goes through one of the transformer coils but not the other one is called. A) Average flux B) Mutual flux C) Total flux D) Leakage flux 5. The fundamental component of the magnetization current the voltage applied to the core by 90°: A) Lags, 45°. B) Leads, 45°. C) Lags, 90°. D). Leads, 90°. 6. The ---- are resistive heating losses in the core of the transformer. A) Hysteresis losses. B) Copper losses. C) Leakage flux losses. D) Eddy current losses. 7. The total rotational losses of an induction motor are a combination of: A) Friction losses B) Windage losses. D) Stray losses. C) Core losses. 8. Induction motors are now the preferred choice for industrial motors due to A) absence of brushes. B) Small size. C) Le control requirements. rugged construction. 9. For an induction motor, if the synchronous speed is 1800 r/m, and the rotor speed 180rad/sec, then the slip will be: A) 5.5% C) 6% B) 4.5% D) 4% 10. The lower the speed of an induction motor, the A) Higher its friction, windage, and stray losses C) Lower its friction, windage, and stray losses B) Lower Core losses D) Higher Core Losses
Transcribed Image Text:1. The power transformer that used to steps the voltage down from transmission levels to distribution levels is called: A) Substation transformer C) Distribution transformer B) Unit transformer D) Potential transformer. 2. The primary and secondary windings of an ideal transformer have power factor. A) Higher. B) Much lower. D) Lower. C) Same. 3. Volt-amperes reactive (VAR) is the unit that used to measure the A) Active power. B) Reactive power. C) Real power. D) Apparent power. 4. The portion of the flux that goes through one of the transformer coils but not the other one is called. A) Average flux B) Mutual flux C) Total flux D) Leakage flux 5. The fundamental component of the magnetization current the voltage applied to the core by 90°: A) Lags, 45°. B) Leads, 45°. C) Lags, 90°. D). Leads, 90°. 6. The ---- are resistive heating losses in the core of the transformer. A) Hysteresis losses. B) Copper losses. C) Leakage flux losses. D) Eddy current losses. 7. The total rotational losses of an induction motor are a combination of: A) Friction losses B) Windage losses. D) Stray losses. C) Core losses. 8. Induction motors are now the preferred choice for industrial motors due to A) absence of brushes. B) Small size. C) Le control requirements. rugged construction. 9. For an induction motor, if the synchronous speed is 1800 r/m, and the rotor speed 180rad/sec, then the slip will be: A) 5.5% C) 6% B) 4.5% D) 4% 10. The lower the speed of an induction motor, the A) Higher its friction, windage, and stray losses C) Lower its friction, windage, and stray losses B) Lower Core losses D) Higher Core Losses
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