Voltage Regulators Flashcards

1
Q

A double-break switch has a construction classification of ? .

A

True

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1
Q

The difference between no-load voltage and full-load voltage, expressed as the percentage of full-load voltage, is called ? .

A

Voltage Regulation

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2
Q

Most electrical circuits do not need additional voltage regulation and control.

A

False

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3
Q

Improving the power factor in a circuit reduces the amount of ? or current needed to supply the load.

A

Apparent power

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4
Q

Changing the ? is one way that voltage is regulated or controlled on a distribution line.

A

Conductor Size

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5
Q

The extent of the voltage drop depends on how much the current flow is impeded.

A

True

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6
Q

The voltage on a line fluctuates throughout the day in proportion to the ? .

A

Current Flow

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7
Q

It is important to keep the voltage to a customer within an acceptable range because high or low voltages can cause ? .

A

damage to customer equipment

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8
Q

If the employer requires that a voltage range of 91.7% to 105.8% be maintained on a 120/240 volt service, the minimum voltage one should read at a customer’s meter base before making voltage corrections is ? (rounded).

A

110/220

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9
Q

The formulas for power loss (I2R) and voltage drop (IR) indicate the relationship between line loss, voltage drop, and ? .

A

amount of current flow

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10
Q

One benefit to an electrical system when it is upgraded to improve the voltage on a line is that there is less energy waste.

A

True

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11
Q

A piece of equipment that improves the power factor, reduces the reactance on the line, reduces the current, and improves the voltage is a(n) ? .

A

Capacitor

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12
Q

The voltages on transmissions lines are constant and do not need regulation.

A

False

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13
Q

The voltage at the source of a distribution feeder must be high enough to provide an adequate input voltage to transformers and voltage regulators feeding customers downstream.

A

True

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14
Q

One way to reduce the capacitive reactance caused by the parallel conductors on very long transmission lines is to install ? .

A

Reactor

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15
Q

A substation transformer’s ? can boost or buck the voltage as needed while the transformer is in service and energized.

A

ULTC

16
Q

A no-load tap changer requires the load on the transformer to be reduced while the tap change is made.

A

False

17
Q

An ampacity chart is not very useful in determining conductor size for a utility circuit.

A

True

18
Q

On distribution circuits, larger conductors are used to reduce the voltage drop and ? on a circuit.

A

line loss

19
Q

The leads going in and out of a set of voltage regulators do not need to be the same size as the main line conductors.

A

True

20
Q

To improve the voltage on a feeder, it is usually more economical to install ? than to carry out a major improvement program such as stringing larger conductors.

A

Voltage Regulator

21
Q

When larger-than-needed transformers are installed, they add to the total line loss.

A

True