Page 1 of 117
NCTI INSTALLER TECHNICIAN EXAM NEWEST 2025
ACTUAL EXAM TEST BANK| 2 VERSIONS (VERSION A
& B) WITH COMPLETE 600 REAL EXAM QUESTIONS
AND CORRECT VERIFIED ANSWERS/ GRADED A+|
NCTI INSTALLER TECHNICIAN EXAM PREP 2025
NCTI INSTALLER TECHNICIAN EXAM VERSION A.
What are the three basic elements of an electrical circuit? - ANSWER -
A power source, a load, and the connecting conductors.
The power source - ANSWER - Is the part of an electrical circuit that
provides a difference of potential.
The load - 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 - 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 - ANSWER - Silver.
The letter and symbol designation for current is ______ and ______,
respectively. - ANSWER - I and A
pg. 1
,Page 2 of 117
Convert 0.893 volts into a power of 10 and metric prefix form: -
ANSWER - 893 x 10-3 V = 893 mV.
How much current would an applied voltage of 60 volts cause in a
circuit of 300 ohms of resistance? - ANSWER - 0.2 A.
What is the voltage in a circuit with 0.8 ampere of current and 100 ohms
of resistance? - ANSWER - 80 V.
_______ ohms of resistance is required for a circuit with an applied
voltage of 30 volts and a circuit current of 1.3 amperes. - ANSWER -
23.076
An ohmmeter should be connected - ANSWER - Across a resistor that is
disconnected from the circuit voltage source.
______ watts of power are consumed in a circuit with an applied voltage
of 60 volts and a load of 150 ohms. - ANSWER - 24
A light bulb is consuming 60 watts of power with 0.9 amperes of current
flowing through it. What is the bulb's resistance? - ANSWER - 74.07
ohms.
What is the maximum electron capacity of a valence shell? - ANSWER -
A valence shell can hold a maximum of eight electrons.
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,Page 3 of 117
Electrons in orbits nearest the nucleus contain _________ energy than
those in more distant orbits. - ANSWER - Electrons in orbits nearest the
nucleus contain less energy than those in more distant orbits.
What will happen to a valence electron that has enough energy added to
it? - ANSWER - A valence electron that has enough energy added to it
will move away from its atom.
What major factor determines which category a particular element
belongs? - ANSWER - The number of electrons in the valence shell
determines the element category.
How many valence electrons are there in a good conductor? - ANSWER
- A good conductor has only one or two valence electrons.
List gold, silver, and copper in the order of best conductivity. (List the
best conductor first.) - ANSWER - #1 Silver; #2 Copper; #3 Gold
Why do metals that each have only one valence electron differ in their
conductivity? - ANSWER - Metals that each have one valence electron
differ in their conductivity because of the way their atoms pack together
into a solid structure.
Describe the two characteristics of an insulator. - ANSWER - 1. Its
valence shell is almost filled and tends to be fairly stable.
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2. It tries to finish filling its valence shell by capturing additional free
electrons.
How many valence electrons are in a semiconductor? - ANSWER - A
semiconductor has four valence electrons.
Name the two types of electron current flow. - ANSWER - Random drift
and directed flow are the two types of electron current flow.
What causes electrons to be knocked loose and travel randomly from
one atom to another? - ANSWER - The movement of atoms in materials
that are conductors and the agitation as they collide cause electrons to be
knocked loose and travel randomly from one atom to another.
The majority of ingress is caused by which of the following? -
ANSWER - The customer.
When checking for ingress at the tap, when would you replace the drop
cable between the ground block and the customer's tap? - ANSWER -
Only if necessary as a last corrective measure.
What is the process for checking for ingress at a drop splitter at the
customer premises? - ANSWER - Inspect the splitter and confirm that all
of the splitter's F-connectors are properly wrench-tightened by using a
7/16-inch torque wrench.
pg. 4
NCTI INSTALLER TECHNICIAN EXAM NEWEST 2025
ACTUAL EXAM TEST BANK| 2 VERSIONS (VERSION A
& B) WITH COMPLETE 600 REAL EXAM QUESTIONS
AND CORRECT VERIFIED ANSWERS/ GRADED A+|
NCTI INSTALLER TECHNICIAN EXAM PREP 2025
NCTI INSTALLER TECHNICIAN EXAM VERSION A.
What are the three basic elements of an electrical circuit? - ANSWER -
A power source, a load, and the connecting conductors.
The power source - ANSWER - Is the part of an electrical circuit that
provides a difference of potential.
The load - 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 - 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 - ANSWER - Silver.
The letter and symbol designation for current is ______ and ______,
respectively. - ANSWER - I and A
pg. 1
,Page 2 of 117
Convert 0.893 volts into a power of 10 and metric prefix form: -
ANSWER - 893 x 10-3 V = 893 mV.
How much current would an applied voltage of 60 volts cause in a
circuit of 300 ohms of resistance? - ANSWER - 0.2 A.
What is the voltage in a circuit with 0.8 ampere of current and 100 ohms
of resistance? - ANSWER - 80 V.
_______ ohms of resistance is required for a circuit with an applied
voltage of 30 volts and a circuit current of 1.3 amperes. - ANSWER -
23.076
An ohmmeter should be connected - ANSWER - Across a resistor that is
disconnected from the circuit voltage source.
______ watts of power are consumed in a circuit with an applied voltage
of 60 volts and a load of 150 ohms. - ANSWER - 24
A light bulb is consuming 60 watts of power with 0.9 amperes of current
flowing through it. What is the bulb's resistance? - ANSWER - 74.07
ohms.
What is the maximum electron capacity of a valence shell? - ANSWER -
A valence shell can hold a maximum of eight electrons.
pg. 2
,Page 3 of 117
Electrons in orbits nearest the nucleus contain _________ energy than
those in more distant orbits. - ANSWER - Electrons in orbits nearest the
nucleus contain less energy than those in more distant orbits.
What will happen to a valence electron that has enough energy added to
it? - ANSWER - A valence electron that has enough energy added to it
will move away from its atom.
What major factor determines which category a particular element
belongs? - ANSWER - The number of electrons in the valence shell
determines the element category.
How many valence electrons are there in a good conductor? - ANSWER
- A good conductor has only one or two valence electrons.
List gold, silver, and copper in the order of best conductivity. (List the
best conductor first.) - ANSWER - #1 Silver; #2 Copper; #3 Gold
Why do metals that each have only one valence electron differ in their
conductivity? - ANSWER - Metals that each have one valence electron
differ in their conductivity because of the way their atoms pack together
into a solid structure.
Describe the two characteristics of an insulator. - ANSWER - 1. Its
valence shell is almost filled and tends to be fairly stable.
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, Page 4 of 117
2. It tries to finish filling its valence shell by capturing additional free
electrons.
How many valence electrons are in a semiconductor? - ANSWER - A
semiconductor has four valence electrons.
Name the two types of electron current flow. - ANSWER - Random drift
and directed flow are the two types of electron current flow.
What causes electrons to be knocked loose and travel randomly from
one atom to another? - ANSWER - The movement of atoms in materials
that are conductors and the agitation as they collide cause electrons to be
knocked loose and travel randomly from one atom to another.
The majority of ingress is caused by which of the following? -
ANSWER - The customer.
When checking for ingress at the tap, when would you replace the drop
cable between the ground block and the customer's tap? - ANSWER -
Only if necessary as a last corrective measure.
What is the process for checking for ingress at a drop splitter at the
customer premises? - ANSWER - Inspect the splitter and confirm that all
of the splitter's F-connectors are properly wrench-tightened by using a
7/16-inch torque wrench.
pg. 4
