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NCTI exam 2023 with 100% correct answers
NCTI exam 2023 with 100% correct answers
[Meer zien]Voorbeeld 2 van de 15 pagina's
Voorbeeld 2 van de 15 pagina's
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NCTI Installer Tech Multiple Choice Part1
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C The transfer of energy from positrons to positrons as a result of withdrawn charges
D The transfer of energy from valence electron to valence electron as a result of withdrawn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
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