NCTI: HFC DESIGNER II TO DESIGNER III
EXAM QUESTIONS AND ANSWERS
Which of the following best describes load resistance? -
correct answer ✅Load resistance is the total resistance when the
source and wire resistances are very small.
Which of the following best describes current? -
correct answer ✅Excessive flow for a specific conductor size can
cause the conductor to become too hot and melt or burn the
conductor's insulating cover.
What is the total DC loop resistance of a 1,850-foot piece of 0.500-
inch coaxial cable with a DC loop resistance of 1.34 ohms per 1,000
feet? -
correct answer ✅2.479 ohms.
How can an installer control the resistance of the drop cable being
installed at a customer's premises? -
correct answer ✅Replace series 59 cable with series 6 cable
because the series 6 cable center conductor is larger in diameter,
with lower resistance than series 59 cable.
Which of the following best describes total resistance in a circuit? -
correct answer ✅It is the sum of the individual resistances in the
circuit.
,NCTI: HFC DESIGNER II TO DESIGNER III
EXAM QUESTIONS AND ANSWERS
What happens when the cross-sectional area of a conductor
doubles? -
correct answer ✅Its resistance decreases to half its original value.
What is the total DC loop resistance of a 350-foot piece of Series 59
drop cable with a DC loop resistance of 56.04 ohms per 1,000 feet?
-
correct answer ✅19.614 ohms.
Which term best describes the opposition a material or device
offers to the current flow? -
correct answer ✅Resistance.
How many ohms is the amount of resistance that allows 1 amp of
current to flow when 1 volt is applied to a circuit? -
correct answer ✅1 ohm.
What does current flow encounter within a power source when
traveling from the positive terminal to the negative terminal? -
correct answer ✅Source resistance.
,NCTI: HFC DESIGNER II TO DESIGNER III
EXAM QUESTIONS AND ANSWERS
What forces AC to flow through a circuit? -
correct answer ✅A polarity changing voltage.
How is the AC voltage from a generator accessed? -
correct answer ✅Through slip rings that maintain physical contact
with stationary brushes that can be connected directly to a circuit.
To transport electric power efficiently, what power line voltage-
current combination would deliver the same amount of power as
10 amps and 10,000 volts, but with the least conductor loss? -
correct answer ✅Combo with lowest current (P=I^2 * R).
Which sine wave frequency has the shortest wavelength? -
correct answer ✅Highest frequency (Y=1/f).
What defines the period of a sine wave? -
correct answer ✅The time it takes for completion of one cycle of
the signal.
What is the sine wave angle? -
correct answer ✅The distance in degrees for the 0 degree
reference point to any other point on the waveform.
, NCTI: HFC DESIGNER II TO DESIGNER III
EXAM QUESTIONS AND ANSWERS
What is the peak value of a sine wave? -
correct answer ✅The most positive or most negative level of each
sine wave half cycle.
What is defined as the most positive or most negative point of each
sine wave half cycle? -
correct answer ✅Peak value.
What is a characteristic of the quasi-square wave produced by the
ferroresonant transformer in HFC network power supplies? -
correct answer ✅The quasi-square wave edges become more
rounded as the load increases.
Which form of fluctuating DC is a symptom of a malfunctioning DC
power supply in HFC amplifiers and fiber nodes? -
correct answer ✅AC ripple.
How do you obtain the simplest form of capacitance? -
correct answer ✅Using two parallel metal plates separated by an
insulator.
EXAM QUESTIONS AND ANSWERS
Which of the following best describes load resistance? -
correct answer ✅Load resistance is the total resistance when the
source and wire resistances are very small.
Which of the following best describes current? -
correct answer ✅Excessive flow for a specific conductor size can
cause the conductor to become too hot and melt or burn the
conductor's insulating cover.
What is the total DC loop resistance of a 1,850-foot piece of 0.500-
inch coaxial cable with a DC loop resistance of 1.34 ohms per 1,000
feet? -
correct answer ✅2.479 ohms.
How can an installer control the resistance of the drop cable being
installed at a customer's premises? -
correct answer ✅Replace series 59 cable with series 6 cable
because the series 6 cable center conductor is larger in diameter,
with lower resistance than series 59 cable.
Which of the following best describes total resistance in a circuit? -
correct answer ✅It is the sum of the individual resistances in the
circuit.
,NCTI: HFC DESIGNER II TO DESIGNER III
EXAM QUESTIONS AND ANSWERS
What happens when the cross-sectional area of a conductor
doubles? -
correct answer ✅Its resistance decreases to half its original value.
What is the total DC loop resistance of a 350-foot piece of Series 59
drop cable with a DC loop resistance of 56.04 ohms per 1,000 feet?
-
correct answer ✅19.614 ohms.
Which term best describes the opposition a material or device
offers to the current flow? -
correct answer ✅Resistance.
How many ohms is the amount of resistance that allows 1 amp of
current to flow when 1 volt is applied to a circuit? -
correct answer ✅1 ohm.
What does current flow encounter within a power source when
traveling from the positive terminal to the negative terminal? -
correct answer ✅Source resistance.
,NCTI: HFC DESIGNER II TO DESIGNER III
EXAM QUESTIONS AND ANSWERS
What forces AC to flow through a circuit? -
correct answer ✅A polarity changing voltage.
How is the AC voltage from a generator accessed? -
correct answer ✅Through slip rings that maintain physical contact
with stationary brushes that can be connected directly to a circuit.
To transport electric power efficiently, what power line voltage-
current combination would deliver the same amount of power as
10 amps and 10,000 volts, but with the least conductor loss? -
correct answer ✅Combo with lowest current (P=I^2 * R).
Which sine wave frequency has the shortest wavelength? -
correct answer ✅Highest frequency (Y=1/f).
What defines the period of a sine wave? -
correct answer ✅The time it takes for completion of one cycle of
the signal.
What is the sine wave angle? -
correct answer ✅The distance in degrees for the 0 degree
reference point to any other point on the waveform.
, NCTI: HFC DESIGNER II TO DESIGNER III
EXAM QUESTIONS AND ANSWERS
What is the peak value of a sine wave? -
correct answer ✅The most positive or most negative level of each
sine wave half cycle.
What is defined as the most positive or most negative point of each
sine wave half cycle? -
correct answer ✅Peak value.
What is a characteristic of the quasi-square wave produced by the
ferroresonant transformer in HFC network power supplies? -
correct answer ✅The quasi-square wave edges become more
rounded as the load increases.
Which form of fluctuating DC is a symptom of a malfunctioning DC
power supply in HFC amplifiers and fiber nodes? -
correct answer ✅AC ripple.
How do you obtain the simplest form of capacitance? -
correct answer ✅Using two parallel metal plates separated by an
insulator.
