Electrician Exam – Third Period

Which of the following is true about autotransformers? Select all that apply (3/5)

If the wye-delta bank secondary connections are connected in ____, the connected loads must be connected in wye only.

In the context of transformer tap labels, the acronym RCBN stands for ____.

Which of the following is true about autotransformers? Select all that apply (4/5)

The coil of a single-phase transformer connected to a source of ____ is referred to as the primary winding.

A ____ measures the maximum apparent power draw and quantity of energy consumed.

Due to exciting current in the primary windings, the ____ of a transformer will be greater than the transformers calculated primary current.

____ are considered as hazardous waste.

____ is the operating principle of a transformer.

The ____ transformer connection has the disadvantage that with a balanced load the primary neutral current holds a third harmonic.

The input voltage on a ____ is lower than the output voltage.

In a four-wire Delta system, the highest voltage to ground is between Line A and the ____.

In a delta system equation I Line = I Phase × (square root of 3) is used, where the square root of 3 has a value of ____.

____ transformers are installed in current limiting applications.

No electrical connection exists between the primary and the secondary windings of a(n) ____.

Which of the following are the methods used to decrease the temperature of a transformer? Select all that apply (2/5)

A ____ mutual transformer can be connected as an autotransformer.

On a transformer the high voltage terminals marked with a capital ____.

On a transformer the low voltage terminals marked with a capital ____.

A ____ was created to allow three-phase three-wire panels and single-phase three-wire panels to operate on the same service.

The SI unit of ____ is the joule.

The ____ of current transformers should not be fused.

Due to the design of a transformer they experience the following two types of losses. Select all that apply (2/5)

To create a three-wire output on a delta-delta transformer you can connect the secondaries in which of the following two methods? Select all that apply (2/5)

Transformer core losses include which of the following two components? Select all that apply (2/5)