Ce Basic Ch.1

Front 1

What is a comparison of two numbers?

Back 1

Ratio

Front 2

How many steps are there to convert a decimal to a fraction?

Back 2

Three

Front 3

What rule specifies a ratio of 1:2:4 for cement, sand, and aggregates for concrete mix?

Back 3

Rule 42

Front 4

What is a number expressed as a fraction of 100?

Back 4

Percentage

Front 5

What is the standard metric unit for mass?

Back 5

Gram

Front 6

What is the boiling point of water at sea level?

Back 6

100° c

Front 7

What is the point where two lines meet to form an angle called?

Back 7

Vertex

Front 8

What tool are angles measured with?

Back 8

Protractor

Front 9

What type of triangle has three sides of different angles?

Back 9

Scalene

Front 10

What is the measurement of a two-dimensional size of a surface called?

Back 10

Area

Front 11

Formula for the area of a rectangle?

Back 11

L x W

Front 12

Formula for the area of a triangle?

Back 12

B x H x .5

Front 13

Formula for the volume of a rectangular shape?

Back 13

L x W x D

Front 14

What is described as the pushing force behind electricity?

Back 14

Voltage

Front 15

Voltage is calculated by multiplying current and resistance. What is this formula known as?

Back 15

Ohms law

Front 16

What is the actual movement of electrons through a conductor known as?

Back 16

Current

Front 17

What is defined as the opposition of current flow?

Back 17

Resistance

Front 18

What is the unit of measurement for resistance?

Back 18

Ohm

Front 19

What is the rate at which work is done called?

Back 19

Power

Front 20

What is current that flows only in one direction referred to as?

Back 20

Direct current

Front 21

What is a variable resistor used to limit current flow?

Back 21

Rheostat

Front 22

What are the smallest building blocks of matter called?

Back 22

Atoms

Front 23

When atoms combine to form molecules, electrons in the outermost shell are either transfer from one atom to another, or shared between atoms in a process known as what?

Back 23

Covalent bonding

Front 24

What are electrically charged atoms called?

Back 24

Ions

Front 25

What does not allow electricity to readily flow through them and have a very high resistance?

Back 25

Insulators

Front 26

How many amperes could stop a human heart under the right circumstances?

Back 26

.1amps

Front 27

What states that current is directly proportional to the voltage and inversely proportional to the resistance?

Back 27

Ohm’s law

Front 28

What is the most common source of DC power?

Back 28

A battery

Front 29

A battery consist of three main components: positive electrodes, negative electrodes, and what else?

Back 29

Electrolytes

Front 30

What type of batteries are also known as rechargeable batteries, storage batteries, or accumulators?

Back 30

Secondary cells

Front 31

What is current flow direction referred to as?

Back 31

Polarity

Front 32

What type of power source does not have a fixed polarity ?

Back 32

AC power

Front 33

What is the most commons means of producing either single-phase or poly-phase power?

Back 33

AC generators

Front 34

What principle do generators use to produce voltage and current?

Back 34

Electromagnetic induction

Front 35

To produce a voltage you need to have a conductor, magnetic field, and what else?

Back 35

Relative motion

Front 36

What has the ability to store a charge and oppose changes in voltage?

Back 36

Capacitor

Front 37

What is defined as the total opposition to the follow of AC in a circuit?

Back 37

Impedance

Front 38

What is the power used to do work plus the power stored during part of a cycle by inductance and capacitance and then returned to the power source called?

Back 38

Apparent power

Front 39

In an AC circuit what is the power actually used to do work?

Back 39

True power

Front 40

What type of circuit is defined as having more than one current path connected to a common voltage source?

Back 40

Parallel circuit

Front 41

What type of electrical circuit is defined as a circuit that contains more than one path of current flow and at least two resistors in a series in one of the paths?

Back 41

Series parallel

Front 42

What are used in a parallel circuit where three or more conductors meet each other?

Back 42

Junction

Front 43

What provides the physical connection between the power source, overcurrent protection, switch, and the load and provides a return path back through the components so that current can flow back to its place of origin?

Back 43

Conductors