NAVEDTRA 14173A, NEETS Mod. 1, Ch.3 Flashcards Preview

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Flashcards in NAVEDTRA 14173A, NEETS Mod. 1, Ch.3 Deck (50)
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1

What is any device called in which an electrical current flows and which changes this electrical energy into a more useful form?

Load

2

Which device furnishes the electrical energy used by the load?

Source

3

What permits control of the electrical device and interrupts the current delivered to the load?

Switch

4

What is the technician’s main aid in troubleshooting a circuit in a piece of equipment?

Schematic Diagram

5

Who proved by an experiment that a precise relationship exists between current, voltage, and resistance?

George Simon Ohm

6

What is current inversely proportional to?

Resistance

7

What is a basic tool used to solve electrical problems?

Algebra

8

What can be constructed to easily analyze a circuit?

Graph

9

Which axis on a graph is known as the X-AXIS?

Horizontal

10

What is the rate at which work is being done referred to as?

Power

11

What unit is electric power rate measured in?

Watts

12

What is the basic unit of power?

Watt

13

What indicates the rate at which devices convert electrical energy into another form of energy?

Power rating

14

In most circuits, the actual power used by a resistor is considerably less than the power rating of the resistor because a safety factor of what percent is used?

50%

15

When resistors with wattage ratings greater than how many watts are needed, wirewound resistors are used?

5

16

Wirewound resistors are made in values between 5 and how many watts?

200

17

Which electrical device property is the ratio of power converted to useful energy divided by the power consumed by the device?

Efficiency

18

How many watts are required to equal one horsepower?

746

19

What is a complete conducting pathway called?

Electric circuit

20

Which type of circuit contains only one path for current flow?

Series

21

Each of the resistors in a series circuit consumes power which is dissipated in the form of what?

Heat

22

The total resistance of a series circuit is equal to the sum of the what?

Individual resistances

23

Which resistor value is the voltage drop across a resistor in a series circuit proportional to?

Ohmic

24

What year did G. R. Kirchhoff extend the use of Ohm’s law by developing a simple concept concerning the voltages contained in a series circuit loop?

1847

25

Which law states that "The algebraic sum of the voltage drops in any closed path in a circuit and the electromotive forces in that path is equal to zero."?

Kirchhoff’s voltage law

26

What are emf sources that would tend to force current in opposite directions said to be?

Series opposing

27

What is an arbitrarily chosen point to which all other points in the circuit are compared?

Reference point

28

Which term is used to denote a common electrical point of zero potential?

Ground

29

What is the common ground for the many electrical circuits in most electrical equipment?

Metal chassis

30

What is a circuit said to be when a break exists in a complete conducting pathway?

Open