A Wye-Delta Transformer Has a Primary Line Voltage of 7200

question 4

Multiple Choice

A wye-delta transformer has a primary line voltage of 7200 V and a secondary line voltage of 480 V. What is the turns ratio?

• A) 8.66:1
• B) 9: 66
• C) 10:15
• D) 15:1

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Definitions:

Logistic Regression

A statistical method used for predicting binary outcomes based on one or more independent variables.

Indicator Variables

Variables used in statistical models to represent subgroups with values typically set to 0 or 1, indicating the absence or presence of a characteristic.

Nominal Variable

A type of variable that represents categories with no intrinsic ranking or order.

Stepwise Regression

A method of regression analysis in which variables are added or removed from a multivariable model in a step-by-step fashion based on statistical criteria.