ECC Test 1 Questions with Verified
Solutions
.1 - ANSWER-Tenths
.01 - ANSWER-Hundredths
.001 - ANSWER-Thousandths
?/2 - ANSWER-Numerator
1/? - ANSWER-Denominator
Matter - ANSWER-Anything that has mass and takes up space
Element - ANSWER-A substance that cannot be broken down into simpler substances
Molecule - ANSWER-two or more atoms held together by covalent bonds
What are the conditions for magnetic energy to be met ? - ANSWER-A conductor , a
magnetic field, and relative motion between field conductors
What does a generator use ? - ANSWER-Magnetic electricity
What drives currents? - ANSWER-Voltage
What makes insulators good at keeping electricity insulated ? - ANSWER-They have
few free electrons
What makes conductors good at conducting electricity? - ANSWER-They have a lot of
free electrons
What is Directed drift? - ANSWER-Directed movement of electrons in a conductor due
to a potential difference.
How does a current of 1amp flow? - ANSWER-When 1 coulomb of change passes a
point in 1 second
What is resistance? - ANSWER-The opposition of current flow that is measured in ohms
, What is resistance determined by? - ANSWER-Resistance is determined by the
physical structure of material
What happens if a compass is placed near a current carrying conductor ? - ANSWER-
The compass needle will align itself at a right angles (90 degrees) to the conductor
indicating a magnetic field
What is the left hand rule for conductors? - ANSWER-Thumb points in direction of
current flow, fingers curl in direction of magnetic field
How is wire size measured? - ANSWER-Using the American wire gage (AWG)
What is a wire ? - ANSWER-A wire is a single slender rod or filament of a drawn metal
RW - ANSWER-Moisture Resistant Rubber compound
What is graded rubber? - ANSWER-The standard that the national electrical code
(NEC) has adopted as the minimum requirements for rubber insulation as specified by
underwriters laboratories
Ohms - ANSWER-Measurement of opposing current flow
What happens with thicker wires? - ANSWER-Higher the current flow
What is conductance ? - ANSWER-The ability of a material to pass electrons
What are wire wounded resistors ? - ANSWER-Resistors that dissipate very large
amounts of power (wattage)
What do resistors protect? - ANSWER-Circuits
What is a short circuit? - ANSWER-A connection that allows current to take an
unintended path.
Class 0 - ANSWER-Red max volts 1,000
Class 1 - ANSWER-White max volts 7,500
Class 2 - ANSWER-Yellow max volts 17,000
Class 3 - ANSWER-Max 26,500v
Ac - ANSWER-alternating current
Dc - ANSWER-direct current
Solutions
.1 - ANSWER-Tenths
.01 - ANSWER-Hundredths
.001 - ANSWER-Thousandths
?/2 - ANSWER-Numerator
1/? - ANSWER-Denominator
Matter - ANSWER-Anything that has mass and takes up space
Element - ANSWER-A substance that cannot be broken down into simpler substances
Molecule - ANSWER-two or more atoms held together by covalent bonds
What are the conditions for magnetic energy to be met ? - ANSWER-A conductor , a
magnetic field, and relative motion between field conductors
What does a generator use ? - ANSWER-Magnetic electricity
What drives currents? - ANSWER-Voltage
What makes insulators good at keeping electricity insulated ? - ANSWER-They have
few free electrons
What makes conductors good at conducting electricity? - ANSWER-They have a lot of
free electrons
What is Directed drift? - ANSWER-Directed movement of electrons in a conductor due
to a potential difference.
How does a current of 1amp flow? - ANSWER-When 1 coulomb of change passes a
point in 1 second
What is resistance? - ANSWER-The opposition of current flow that is measured in ohms
, What is resistance determined by? - ANSWER-Resistance is determined by the
physical structure of material
What happens if a compass is placed near a current carrying conductor ? - ANSWER-
The compass needle will align itself at a right angles (90 degrees) to the conductor
indicating a magnetic field
What is the left hand rule for conductors? - ANSWER-Thumb points in direction of
current flow, fingers curl in direction of magnetic field
How is wire size measured? - ANSWER-Using the American wire gage (AWG)
What is a wire ? - ANSWER-A wire is a single slender rod or filament of a drawn metal
RW - ANSWER-Moisture Resistant Rubber compound
What is graded rubber? - ANSWER-The standard that the national electrical code
(NEC) has adopted as the minimum requirements for rubber insulation as specified by
underwriters laboratories
Ohms - ANSWER-Measurement of opposing current flow
What happens with thicker wires? - ANSWER-Higher the current flow
What is conductance ? - ANSWER-The ability of a material to pass electrons
What are wire wounded resistors ? - ANSWER-Resistors that dissipate very large
amounts of power (wattage)
What do resistors protect? - ANSWER-Circuits
What is a short circuit? - ANSWER-A connection that allows current to take an
unintended path.
Class 0 - ANSWER-Red max volts 1,000
Class 1 - ANSWER-White max volts 7,500
Class 2 - ANSWER-Yellow max volts 17,000
Class 3 - ANSWER-Max 26,500v
Ac - ANSWER-alternating current
Dc - ANSWER-direct current
