Flashcards in Ch 3 Deck (41)

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1

## In a parallel circuit, the total power is equal to what?

### The sum of the branches' powers

2

## What can happen if the neutral conductor of a multi-wire circuit is interrupted (opened)? Why?

### Fire or destruction of equipment, because it can cause overvoltage or undervoltage of the electrical equipment.

3

## The current flowing in the neutral conductor of a multi-wire circuit is called:

### Unbalanced Current

4

## The neutral conductor of a 3-wire, 120/208V or 277/480V circuit from a 4-wire, three phase system will ______ carry neutral current

### Always

5

## In a parallel circuit, the resistance total is _____ than the smallest individual resistance

### Less

6

## This type of circuit is also called "Open-loop system"

### Parallel

7

## What is the formula for the Product-Over-Sum Method?

### Rt = (R1 x R2) / (R1 + R2)

8

## This conductor is also called a "grounded conductor"

### Neutral

9

## In a series circuit, what does the sum of the power consumed by all the resistors equal?

### The total power consumed by the circuit

10

## (Series or Parallel) Total power is equal to the sum of the branches' powers

### Parallel

11

## The _______ conductor or a solidly grounded system is required to be grounded.

### Neutral

12

## (Series or Parallel) Total resistance is less than the smallest individual resistance

### Parallel

13

## Term for "connected to the Earth"

### Grounded

14

## Because of the dangers of an open neutral conductor, what does the NEC require in a multi-wire circuit?

### That the neutral be spliced and brought out to the device. This way if the device is removed, it does not result in an open neutral conductor.

15

## Circuit consisting of two or more ungrounded conductors that have a voltage between them, and an equal voltage between each ungrounded conductor

### Multi-wire Circuit

16

## Current is identical through all circuit elements in this type of circuit

### Series

17

## In a 3-wire 120/240V, single-phase circuit, the current flowing on the neutral will be what?

### The difference between the current on the ungrounded conductors

18

## When power supplies are connected in series, the voltage of the power supply will be ________

### Additive

19

## (Series or Parallel) The sum of the currents through each path is equal to the total current that flows from the source

### Parallel

20

## In a parallel circuit, voltage is ____ across each component of the parallel circuit?

### The same

21

## In a parallel circuit, the sum of the currents through each path is equal to what?

### The total current that flows from the power source

22

## In a multi-wire branch circuit, what could cause the neutral to become overloaded with current and damage the insulation?

### Not terminating the ungrounded conductors to separate phases

23

## (Series or Parallel) Current is constant

### Series

24

## (Series or Parallel) Total resistance of a series circuit is equal to the sum of all of the resistances of the circuit

### Series

25

## What is the formula for the Reciprocal Mehtod?

### Rt = 1 /(1 /R1, + 1/R2, + 1/R3......)

26

## If the circuit is balanced and the current flow on each line of the circuit is the same, how much current will the neutral conductor carry?

### 0 Amps

27

## (Series or Parallel) Has two or more paths for current to flow through

### Parallel

28

## In a 2-wire circuit, the _____ flowing on the neutral will be the same as the ______ on the ungrounded conductors.

### Current, Current

29

## This type of circuit is also called a "closed-loop system"

### Series

30