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This post was last edited by Wang Tianze on 2015-11-30 at 20:17. One question per day – since it involves electrical engineering knowledge, it was initially published on the dashboard; starting from 12.01, it will be posted on the electrical engineering section. 52. In our country, the low-voltage supply voltage is 220V for single-phase systems and 380V for three-phase systems; these values refer to the (C) of alternating current voltage. A. Average value B. Maximum value C. Effective value D. Instantaneous value 53. A gauge has an accuracy class of 0.5; after being used for some time, its maximum absolute error is ±0.8%. Then this gauge should be classified as (C) class. A. ±0.8% B. 0.8 C. 1.0 D. 0.5 Closed
52. In our country, the low-voltage supply voltage is 220V for single-phase systems and 380V for three-phase systems; these values refer to the (C) of alternating current voltage. A. Average value B. Maximum value C. Effective value D. Instantaneous value 53. A gauge has an accuracy class of 0.5; after being used for some time, its maximum absolute error is ±0.8%. Then this gauge should be classified as (C) class. A. ±0.8% B. 0.8 C. 1.0 D. 0.5
52. In our country, the low-voltage supply voltage is 220V for single-phase systems and 380V for three-phase systems; these values refer to the (C) of alternating current voltage. A. Average value B. Maximum value C. Effective value D. Instantaneous value 53. A instrument has an accuracy class of 0.5; after being used for some time, its maximum absolute error is ±0.8%. Then this instrument should be classified as (C) class. A. ±0.8% B. 0.8 C. 1.0 D. 0.5
52. In our country, the low-voltage supply voltage is 220V for single-phase systems and 380V for three-phase systems; these values refer to the alternating current voltage (c). A. Average value B. Maximum value C. Effective value D. Instantaneous value 53. A instrument has an accuracy class of 0.5; after being used for some time, its maximum absolute error is ±0.8%. Then this instrument should be classified as category (c). A. ±0.8% B. 0.8 C. 1.0 D. 0.5
52. In our country, the low-voltage supply voltage is 220V for single-phase systems and 380V for three-phase systems; these values refer to the (C. effective value) of the alternating current voltage. 53. A gauge has an accuracy class of 0.5; after being used for some time, its maximum absolute error becomes ±0.8%. Therefore, this gauge should be classified as class (C.1.0).
52. In our country, the low-voltage supply voltage is 220V for single-phase systems and 380V for three-phase systems; these values refer to the (C) of alternating current voltage. A. Average value B. Maximum value C. Effective value D. Instantaneous value 53. A instrument has an accuracy class of 0.5; after being used for some time, its maximum absolute error is ±0.8%. Then this instrument should be classified as (C) class. A. ±0.8% B. 0.8 C. 1.0 D. 0.5
52. In our country, the low-voltage supply voltage is 220V for single-phase systems and 380V for three-phase systems; these values refer to the (C) of alternating current voltage. 53. A gauge has an accuracy class of 0.5; after being used for some time, its maximum absolute error becomes ±0.8%. Then this gauge should be classified as (C) class.
52. In our country, the low-voltage supply voltage is 220V for single-phase systems and 380V for three-phase systems; these values refer to the alternating current voltage (C). A. Average value B. Maximum value C. Effective value D. Instantaneous value 53. A instrument has an accuracy class of 0.5; after being used for some time, its maximum absolute error is ±0.8%. Then this instrument should be classified as (C) class. A. ±0.8% B. 0.8 C. 1.0 D. 0.5
52. In our country, the low-voltage supply voltage is 220V for single-phase systems and 380V for three-phase systems; these values refer to the (C. effective value) of the alternating current voltage. 53. A gauge has an accuracy class of 0.5; after being used for some time, its maximum absolute error becomes ±0.8%. Therefore, this gauge should be classified as (C. 1.0) class.