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NCTI Installer Tech Multiple Choice Part 1 Question and answers rated A+ 2023
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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C The transfer of energy from positrons to positrons as a result of withdrawn charges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withdrawn charges - correct answer B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
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
C Where only some of the magnetic domains are pointing in the same direction, the
magnetic field is weaker
D Where all of the magnetic domains are pointing in the opposite direction, the
magnetic field is weaker - correct answer C
The strength of an electromagnetic field is
A Determined by the magnitude of the magnetomotive force
B Determined by number of valence electrons in the wire
C Determined by the number of valence electrons in the metal bar
D Determined by the magnitude of the mass - correct answer A
The magnetic field
A Created by a straight piece of wire is stronger than that created by forming loops of
wire
B Created by an outlet is weaker than that created by a battery
C Created by a battery is weaker than that created by an outlet
D Created by a straight piece of wire is weaker than that created by forming loops of
wire - correct answer D
Flux lines
A Never curve around through the body of the magnet to form complete loops
B Always curve around through the body of the magnet to form half loops
C Always curve around through the body of the magnet to form complete loops
D Sometimes curve around through the body of the magnet to form half loops - correct
answer C
Magnetic poles that are ____ will ____ each other when those poles are near each
other.
A Alike, attract
B Dissimilar, repel
C Alike, have no affect on
D Alike, repel - correct answer D
A permanent-magnet loudspeaker
A Has a cone that moves back and forth in relation to the varying current of the original
sound
B Has a cone that stays put in relation to the varying current of the original sound
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