1. Raising the transmission voltage and reducing the resulting transmission currents by a factor of (12) using transformers will reduce power transmission losses by a factor of -----. A) 100 B) 150 C) 144 D) 125. 2. The transformer that steps the voltage down from transmission levels to distribution levels, is called a ------- transformer. A) Unit transformer. B) Substation transformer. D) Current transformer. C) Distribution transformer. 3. The principal purpose of a transformer is to convert--------. A) AC power at one voltage level to AC power with different frequency at another voltage level. B) AC power at one voltage level to AC power of the same frequency at another voltage level. C) AC power at one voltage level to DC power at another voltage level. D) DC power at one voltage level to DC power at another voltage level.
1. Raising the transmission voltage and reducing the resulting transmission currents by a factor of (12) using transformers will reduce power transmission losses by a factor of -----. A) 100 B) 150 C) 144 D) 125. 2. The transformer that steps the voltage down from transmission levels to distribution levels, is called a ------- transformer. A) Unit transformer. B) Substation transformer. D) Current transformer. C) Distribution transformer. 3. The principal purpose of a transformer is to convert--------. A) AC power at one voltage level to AC power with different frequency at another voltage level. B) AC power at one voltage level to AC power of the same frequency at another voltage level. C) AC power at one voltage level to DC power at another voltage level. D) DC power at one voltage level to DC power at another voltage level.
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.14P: A single-phase 50-kVA,2400/240-volt,60-Hz distribution transformer is used as a step-down...
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