NCTI Installer Tech Multiple Choice Part
1 correctly answered rated A+ 2023
20 milliamperes is the same as _________ amperes.
A2
B 0.2
C 0.02
D 0.002 - correct answer C
The orbital shell that has a maximum capacity of 18 valence electrons is the ________ shell.
A First
B Second
C Third
D Fourth - correct answer C
A semiconductor material has ___ valence electron(s)
A1
B2
C3
D 4 - correct answer D
The major factor in determining whether a particular element is a conductor, semiconductor, or insulator
is
A The number of electrons in the valence shell
B The number of neutrons in the nucleus
C The number of positrons in the nucleus
D The number of electron shells filled - correct answer A
,Elements that are called conductors have
A No valence electrons
B Very few valence electrons
C Half of the maximum capacity of valence electrons
D Completely full valence electrons - correct answer B
The term voltage usually refers to
A Indicates how many coulombs pass a given point during the 1 second
B The measurement of electrical resistance
C The measurement of electromotive force
D The measurement of the difference in potential between two charges - correct answer D
The ampere
A Indicates how many coulombs pass a given point during the 1 second
B The measurement of electrical resistance
C The measurement of electromotive force
D The measurement of the difference in potential between two charges - correct answer A
Electrical current is actually produced by
A The transfer of energy from positrons to valence electrons as a result of applied charges
B The transfer of energy from valence electron to valence electron as a result of applied charges
C The transfer of energy from positrons to positrons as a result of withdrawn charges
D The transfer of energy from valence electron to valence electron as a result of withdrawn charges -
correct answer B
What prevents the electrons that orbit an atom's nucleus at high speeds from breaking away from the
nucleus due to centrifugal force?
A The repulsion between the positive nucleus and the negative electrons
B The repulsion between the neutral nucleus and the negative electrons
, C The attraction between the neutral nucleus and the negative electrons
D The attraction between the positive nucleus and the negative electrons - correct answer D
5 kilovolts is the same as
A 50 kV
B 5 kV
C 0.5 mV
D 5 MV - correct answer B
To create an electromagnet
A Wrap a coil of uninsulated wire around an iron bar and pass an electric current through the wire
B Wrap a coil of insulated wire around a copper bar and pass an electric current through the wire
C Wrap a coil of uninsulated wire around an iron bar and pass an electric current through the wire
D Wrap a coil of insulated wire around an iron bar and pass an electric current through the wire - correct
answer D
Magnetism
A Was discovered when the Greeks noticed that magnetite always aligned itself in a west and east
direction
B Was discovered when the Greeks noticed that magnetite always aligned itself in a north and south
direction
C Was discovered when the Romans noticed that magnetite always aligned itself in a north and south
direction
D Was discovered when the Romans noticed that magnetite always aligned itself in a west and east
direction - correct answer B
In a magnetic material
A Where all of the magnetic domains are pointing in the same direction, the magnetic field is weaker
B Where only some of the magnetic domains are pointing in the same direction, the magnetic field is
stronger
1 correctly answered rated A+ 2023
20 milliamperes is the same as _________ amperes.
A2
B 0.2
C 0.02
D 0.002 - correct answer C
The orbital shell that has a maximum capacity of 18 valence electrons is the ________ shell.
A First
B Second
C Third
D Fourth - correct answer C
A semiconductor material has ___ valence electron(s)
A1
B2
C3
D 4 - correct answer D
The major factor in determining whether a particular element is a conductor, semiconductor, or insulator
is
A The number of electrons in the valence shell
B The number of neutrons in the nucleus
C The number of positrons in the nucleus
D The number of electron shells filled - correct answer A
,Elements that are called conductors have
A No valence electrons
B Very few valence electrons
C Half of the maximum capacity of valence electrons
D Completely full valence electrons - correct answer B
The term voltage usually refers to
A Indicates how many coulombs pass a given point during the 1 second
B The measurement of electrical resistance
C The measurement of electromotive force
D The measurement of the difference in potential between two charges - correct answer D
The ampere
A Indicates how many coulombs pass a given point during the 1 second
B The measurement of electrical resistance
C The measurement of electromotive force
D The measurement of the difference in potential between two charges - correct answer A
Electrical current is actually produced by
A The transfer of energy from positrons to valence electrons as a result of applied charges
B The transfer of energy from valence electron to valence electron as a result of applied charges
C The transfer of energy from positrons to positrons as a result of withdrawn charges
D The transfer of energy from valence electron to valence electron as a result of withdrawn charges -
correct answer B
What prevents the electrons that orbit an atom's nucleus at high speeds from breaking away from the
nucleus due to centrifugal force?
A The repulsion between the positive nucleus and the negative electrons
B The repulsion between the neutral nucleus and the negative electrons
, C The attraction between the neutral nucleus and the negative electrons
D The attraction between the positive nucleus and the negative electrons - correct answer D
5 kilovolts is the same as
A 50 kV
B 5 kV
C 0.5 mV
D 5 MV - correct answer B
To create an electromagnet
A Wrap a coil of uninsulated wire around an iron bar and pass an electric current through the wire
B Wrap a coil of insulated wire around a copper bar and pass an electric current through the wire
C Wrap a coil of uninsulated wire around an iron bar and pass an electric current through the wire
D Wrap a coil of insulated wire around an iron bar and pass an electric current through the wire - correct
answer D
Magnetism
A Was discovered when the Greeks noticed that magnetite always aligned itself in a west and east
direction
B Was discovered when the Greeks noticed that magnetite always aligned itself in a north and south
direction
C Was discovered when the Romans noticed that magnetite always aligned itself in a north and south
direction
D Was discovered when the Romans noticed that magnetite always aligned itself in a west and east
direction - correct answer B
In a magnetic material
A Where all of the magnetic domains are pointing in the same direction, the magnetic field is weaker
B Where only some of the magnetic domains are pointing in the same direction, the magnetic field is
stronger
