CE Basic Chapter 1 Electrical Theory

Question 1

What is a comparison of two numbers?

Answer 1

Ratio

Question 2

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

Answer 2

Rule 42

Question 3

What is the boiling point of water at sea level?

Answer 3

100 C

Question 4

An architects scale is used to read all plans except for what?

Answer 4

Site plans

Question 5

What do two straight lines that meet in a common point form?

Answer 5

Angle

Question 6

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

Answer 6

Vertex

Question 7

What tool are angles measured with?

Answer 7

Protractor

Question 8

What type of angle measures between 0 and 90 degrees?

Answer 8

Acute

Question 9

A right angle measures how many degrees?

Answer 9

90

Question 10

What type of angle measures between 90 and 180?

Answer 10

Obtuse

Question 11

What is a four sides shape with all four angles being right angles?

Answer 11

Rectangle

Question 12

What do 3 angles in a triangle always add up to?

Answer 12

180

Question 13

What type of triangle has two sides of equal lengths?

Answer 13

Isosceles

Question 14

What type of triangle has three sides of different lengths?

Answer 14

Scalene

Question 15

What measurement of a circle is the outside perimeter of the circle?

Answer 15

Circumference

Question 16

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

Answer 16

Area

Question 17

What is the formula for finding the area of a rectangle?

Answer 17

A=L x W

Question 18

What is the formula for finding the area of a triangle?

Answer 18

A = B x H x0.5

Question 19

What is the formula for finding the area of a rectangular shape?

Answer 19

V = L x W x D

Question 20

What is describe as the pushing force of electricity?

Answer 20

Voltage

Question 21

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

Answer 21

Current

Question 22

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

Answer 22

Ohms law

Question 23

What is defined as opposition to current flow?

Answer 23

Resistance

Question 24

What is the unit of measurement of resistance?

Answer 24

Ohm

Question 25

What is the rate at which work is done?

Answer 25

Power

Question 26

What is current that flows in one direction know as?

Answer 26

Direct current

Question 27

What is used to change the direction of completely stop current flow by opening or closing a switch?

Answer 27

Switch

Question 28

What is the variable resistor used to limit current flow?

Answer 28

Rheostat

Question 29

What are the smallest building blocks of matter called?

Answer 29

Atoms

Question 30

What percentage of an atoms weight does the nucleus account for?

Answer 30

99.9

Question 31

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

Answer 31

Covalent bonding

Question 32

What are negatively charged particles called?

Answer 32

Electrons

Question 33

What are electrically charged atoms called?

Answer 33

Ions

Question 34

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

Answer 34

Insulators

Question 35

Up to how many electrons can atoms contain in their valence ring?

Answer 35

1-8

Question 36

How many amperes could stop a Human heart under be right circumstance?

Answer 36

0.1

Question 37

All electrical circuits are a combination of what three electrical properties?

Answer 37

Voltage current resistance

Question 38

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

Answer 38

Ohms law

Question 39

What is the most common source of DC

Answer 39

Battery

Question 40

A battery consist of three main components?

Answer 40

Positive electrode Negative electrode Electrolyte

Question 41

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

Answer 41

Secondary cells

Question 42

What is current flow direction referred to as?

Answer 42

Polarity

Question 43

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

Answer 43

AC

Question 44

What is used to display the voltage, current, or both at the same time in the form of waves, sinusoidal waves through a cathode ray tube?

Answer 44

Oscilloscope

Question 45

What is the maximum amount of voltage or current at the Maximum positive or Negative point on sine wave called?

Answer 45

Peak value

Question 46

What are the effective values for AC often called?

Answer 46

RMS value

Question 47

What will the unit of measure for frequency?

Answer 47

Hertz (Hz)

Question 48

In the United States, power is generated with a frequency of what to be used in all household appliances?

Answer 48

60Hz

Question 49

What are the most common means of producing either single phase of poly phase power?

Answer 49

AC generators

Question 50

What principal do generators use to produce voltage and current?

Answer 50

Electromagnetic induction

Question 51

What type of electricity is widely used to power heavy equipment m?

Answer 51

Three phase

Question 52

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

Answer 52

Relative motion

Question 53

What is unit of inductance?

Answer 53

Henry

Question 54

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

Answer 54

Capacitor

Question 55

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

Answer 55

Impedance

Question 56

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 words?

Answer 56

Apparent power

Question 57

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

Answer 57

True power?

Question 58

For an AC circuit what is the ratio of the true power to the apparent power in that circuit?

Answer 58

Power factor

Question 59

What is defined as the sinusodial component added to a sine wave, having a frequency that is a Multiple of the fundamental frequency?

Answer 59

Harmonic

Question 60

What is defined as two or more units of resistance connected end to end to form only one path for current flow and an AC or DC voltage source?

Answer 60

Series circuit

Question 61

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

Answer 61

3

Question 62

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

Answer 62

Parallel

Question 63

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 series in one of the paths?

Answer 63

Series parallel

Question 64

What allow you to start or stop the flow of power to electrical equipment by physically opening or closing the circuit

Answer 64

Switches

Question 65

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

Answer 65

Conductors

Question 66

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

Answer 66

Junction

Question 67

What term refers to the process of securing the ends of the line to prevent the strands from unraveling an the yarns from separating or fraying?

Answer 67

Whipping

Question 68

What refers to the tension at which line will part when a load is applied

Answer 68

Breaking strength

Question 69

What property of a line is the load that can be applied without causing any kind of damage to the line?

Answer 69

SWL