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NCTI Installer Technician 2023 | 200 Actual Questions and Answers 100% Correct
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NCTI Installer Technician 2023 | 200 ActualQuestions and Answers 100% Correct
20 milliamperes is the same as ________. (Remember, 1 milliampere = 0.001 ampere.)
- correct answer✔✔ 0.02 amperes
The orbital shell that has a maximum electron capacity of 18 electrons is the
___________ shell. - correct answer✔✔ Third
A semiconductor material - correct answer✔✔ Has four valence electrons.
The major factor for determining whether a particular element is a conductor, a
semiconductor, or an insulator is - correct answer✔✔ The number of electrons in the
valence shell.
Elements that are called conductors - correct answer✔✔ Have very few valence
electrons.
The term voltage normally refers to - correct answer✔✔ The measurement of the
difference in potential between two charges.
The ampere - correct answer✔✔ Indicates how many coulombs pass a given point
during 1 second.
Electric current is actually produced by - correct answer✔✔ The transfer of energy
from valence electron to valence electron as a result of applied charges.
What prevents the electrons that orbit an atom's nucleus at high speeds from breaking
away from the nucleus due to centrifugal force? - correct answer✔✔ The attraction
between the positive nucleus and the negative electron.
5 kilovolts is the same as - correct answer✔✔ 5 kV.
To create an electromagnet, - correct answer✔✔ Wrap a coil of insulated wire around
an iron bar and pass an electric current through the wire.
Magnetism - correct answer✔✔ Was discovered when the Greeks noticed that
magnetite always aligned itself in a north and south direction.
In a magnetic material, - correct answer✔✔ Where only some of the magnetic
domains are pointing in the same direction, the magnetic field is weaker.
,The strength of an electromagnetic field is - correct answer✔✔ Determined by the
magnitude of the magnetomotive force (mmf).
The magnetic field - correct answer✔✔ Created by a straight piece of wire is weaker
than that created by forming loops of wire.
Flux lines - correct answer✔✔ Always curve around through the body of the magnet
to form complete loops.
Magnetic poles that are ___________ will ____________ each other when those poles
are near each other. - correct answer✔✔ Alike, repel
A permanent-magnet loudspeaker - correct answer✔✔ Has a cone that moves back
and forth in relation to the varying current of the original sound.
The left-hand rule for electromagnetism in a wire states that - correct answer✔✔ If
you wrap the fingers of your left hand around the wire with your thumb pointing in the
direction of the current flow, your fingers will be wrapped in the direction of the magnetic
field.
The recording head of a tape recorder is actually a(an) - correct answer✔✔
Electromagnet.
(-25) + (42) + (-62) + (20) = - correct answer✔✔ -25
(-17) - (-34) = - correct answer✔✔ 17
(17) x (-19) = - correct answer✔✔ -323
-49/-7 = - correct answer✔✔ 7
(20) / (-4) + (-2) x (-10) - (-2) x (7) = - correct answer✔✔ 29
3 6/9 + 6 1/3 + 9 5/9 = - correct answer✔✔ 19 5/9
4/7 x 9 4/11 = - correct answer✔✔ 5 27/77
7 3/8 divided by 7 1/4 = - correct answer✔✔ 1 1/58
13 X 0.123 = - correct answer✔✔ 0.99999
0.5349 divided by 0.1420 = - correct answer✔✔ 3.7669014
, Which of the following is a true axiom? - correct answer✔✔ When A = C and B = C,
then A = B because both are equal to C, which supports the axiom: Quantities equal to
the same quantity are equal to each other.
Simplify and solve the equation: If E = IR then what is the formula for finding I? - correct
answer✔✔ E/R.
The square of 7 = _____. - correct answer✔✔ 49
The square root of 81 = _____. - correct answer✔✔ 9
0.00004 = ______ x 10 to the power of ______. - correct answer✔✔ 4, -5
(75 x 10^3)+(25 x 10^4) = ____. - correct answer✔✔ 32.5 x 10^4
(480 x 10^-5) / (60 x 10^-3) = _____. - correct answer✔✔ 8 x 10^-2
10 to the power of -3 has a metric prefix of ______. - correct answer✔✔ Milli
(250 x 10^-6) - (7 x 10^-5) = _____. - correct answer✔✔ 180 x 10^-6
(75 x 10^3) + (2.5 x 10^4) = ____. - correct answer✔✔ 100 x 10^3
What are the three basic elements of an electrical circuit? - correct answer✔✔ A
power source, a load, and the connecting conductors.
The power source - correct answer✔✔ Is the part of an electrical circuit that provides
a difference of potential.
The load - correct answer✔✔ Is the part of the electrical circuit that uses the electrical
energy provided by the power source to carry out some desired function.
A conductor - correct answer✔✔ Provides a path for the current flow from the power
source to the load and from the load back to the power source.
The metal that has the greatest conductance is - correct answer✔✔ Silver.
Normal current flow results - correct answer✔✔ When the circuit operates properly
and no damage occurs to the circuit components.
Excessive current flow - correct answer✔✔ Is often the result of the failure of a small
part within a larger circuit.
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