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New CE Exam 2016 March > CE Basic Chapter 1 Electrical Theory > Flashcards

CE Basic Chapter 1 Electrical Theory Flashcards

1
Q

What is a comparison of two numbers?

A

Ratio

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2
Q

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

A

Rule 42

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3
Q

What is the boiling point of water at sea level?

A

100 C

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4
Q

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

A

Site plans

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5
Q

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

A

Angle

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6
Q

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

A

Vertex

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7
Q

What tool are angles measured with?

A

Protractor

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8
Q

What type of angle measures between 0 and 90 degrees?

A

Acute

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9
Q

A right angle measures how many degrees?

A

90

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10
Q

What type of angle measures between 90 and 180?

A

Obtuse

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11
Q

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

A

Rectangle

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12
Q

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

A

180

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13
Q

What type of triangle has two sides of equal lengths?

A

Isosceles

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14
Q

What type of triangle has three sides of different lengths?

A

Scalene

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15
Q

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

A

Circumference

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16
Q

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

A

Area

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17
Q

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

A

A=L x W

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18
Q

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

A

A = B x H x0.5

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19
Q

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

A

V = L x W x D

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20
Q

What is describe as the pushing force of electricity?

A

Voltage

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21
Q

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

A

Current

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22
Q

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

A

Ohms law

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23
Q

What is defined as opposition to current flow?

A

Resistance

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24
Q

What is the unit of measurement of resistance?

A

Ohm

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25
Q

What is the rate at which work is done?

A

Power

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26
Q

What is current that flows in one direction know as?

A

Direct current

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27
Q

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

A

Switch

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28
Q

What is the variable resistor used to limit current flow?

A

Rheostat

29
Q

What are the smallest building blocks of matter called?

A

Atoms

30
Q

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

A

99.9

31
Q

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?

A

Covalent bonding

32
Q

What are negatively charged particles called?

A

Electrons

33
Q

What are electrically charged atoms called?

A

Ions

34
Q

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

A

Insulators

35
Q

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

A

1-8

36
Q

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

A

0.1

37
Q

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

A

Voltage current resistance

38
Q

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

A

Ohms law

39
Q

What is the most common source of DC

A

Battery

40
Q

A battery consist of three main components?

A

Positive electrode
Negative electrode
Electrolyte

41
Q

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

A

Secondary cells

42
Q

What is current flow direction referred to as?

A

Polarity

43
Q

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

A

AC

44
Q

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?

A

Oscilloscope

45
Q

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

A

Peak value

46
Q

What are the effective values for AC often called?

A

RMS value

47
Q

What will the unit of measure for frequency?

A

Hertz (Hz)

48
Q

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

A

60Hz

49
Q

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

A

AC generators

50
Q

What principal do generators use to produce voltage and current?

A

Electromagnetic induction

51
Q

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

A

Three phase

52
Q

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

A

Relative motion

53
Q

What is unit of inductance?

A

Henry

54
Q

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

A

Capacitor

55
Q

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

A

Impedance

56
Q

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?

A

Apparent power

57
Q

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

A

True power?

58
Q

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

A

Power factor

59
Q

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

A

Harmonic

60
Q

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?

A

Series circuit

61
Q

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

A

3

62
Q

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

A

Parallel

63
Q

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?

A

Series parallel

64
Q

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

A

Switches

65
Q

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

A

Conductors

66
Q

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

A

Junction

67
Q

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?

A

Whipping

68
Q

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

A

Breaking strength

69
Q

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

A

SWL

New CE Exam 2016 March (2 decks)

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