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NYC Radio Repair Mechanic Exam QUESTIONS
AND DETAILED SOLUTIONS JUST RELEASED
NYC Radio Repair Mechanic Exam
The NYC Radio Repair Mechanic Exam is a civil service examination administered by the New York City
Department of Citywide Administrative Services for Radio Repair Mechanic positions in NYC agencies.
The exam focuses on installing, maintaining, troubleshooting, and repairing radio communication and
electronic systems.
Exam Coverage
Radio Communications Systems – Land mobile radio systems, UHF and VHF communications, analog
and digital radio equipment, radio transmitters, receivers, repeaters, and communication networks.
Electronics Fundamentals – AC/DC theory, voltage, current, resistance, capacitance, inductance,
semiconductors, transistors, integrated circuits, and electronic troubleshooting.
Radio Frequency (RF) Theory – RF propagation, frequencies, modulation methods, antennas, signal
strength, interference, and communication performance.
Radio Equipment Troubleshooting – Diagnosing electronic faults, signal tracing, circuit analysis,
component testing, equipment repair, and performance verification.
Test Equipment Usage – Multimeters, oscilloscopes, signal generators, wattmeters, SWR meters,
frequency counters, and diagnostic instruments.
Antennas & Transmission Systems – Antenna installation, antenna testing, feedlines, impedance
matching, standing wave ratio (SWR), and transmission efficiency.
Digital Communications Systems – Digital radio systems, trunked radio systems, communication
protocols, and public safety communications.
Schematics & Blueprint Reading – Reading electronic diagrams, wiring schematics, technical manuals,
circuit layouts, and manufacturer documentation.
FCC Rules & Communications Regulations – Federal communications requirements, radio operating
standards, licensing concepts, and communications regulations.
Electrical Safety & Workplace Safety – Electrical hazards, lockout/tagout awareness, safe work
practices, ladder safety, lifting procedures, and hazard recognition.
Audio, Video & Electronic Systems – Public address systems, intercom systems, CCTV equipment, audio
amplifiers, television systems, and electronic support equipment.
NYC Radio Repair Mechanic Exam
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Question 1
A radio repair technician is measuring the resistance of a component in a circuit and obtains a reading of
zero ohms. The component should normally provide resistance to current flow. Which of the following is
the most likely cause of this condition and what is the appropriate corrective action?
A) Open circuit in the component; replace the component with a new one
B) Short circuit has developed across the component; locate and repair the short
C) Proper function of the component; no action is required
D) Overvoltage condition caused the component to fail; increase circuit voltage
Answer: B
Rationale: A zero ohm reading across a component that should provide resistance indicates a short
circuit has developed across it, bypassing the component. Short circuits allow excessive current flow and
can damage other components. The technician must locate and repair the short circuit to restore
normal circuit operation .
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Question 2
A mechanic needs to calculate the current flowing through a radio circuit after measuring 12 volts across
a 4-ohm resistor. Which fundamental electrical law should be applied to determine the correct value?
A) Kirchhoff's Voltage Law
B) Faraday's Law of Induction
C) Ohm's Law
D) Coulomb's Law
Answer: C
Rationale: Ohm's Law defines the relationship between voltage, current, and resistance: I = V/R. With 12
volts across 4 ohms, the current is 3 amperes. This fundamental relationship is essential for
troubleshooting and repairing radio circuits .
Question 3
Which component in a radio circuit is primarily used to store electrical energy in an electric field and
release it when needed for filtering or tuning applications?
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A) Resistor
B) Capacitor
C) Inductor
D) Diode
Answer: B
Rationale: A capacitor stores electrical energy in an electric field between its plates. In radio circuits,
capacitors are used for filtering, coupling, decoupling, and tuning applications .
Question 4
During routine preventive maintenance inspection of a municipal base station, a technician measures a
Voltage Standing Wave Ratio (VSWR) of 3.5:1 at the transmitter output. What does this measurement
indicate about the transmission system?
A) The transmission system is perfectly matched and delivering maximum power to the antenna
B) A significant portion of the transmitted power is being reflected back to the transmitter
NYC Radio Repair Mechanic Exam QUESTIONS
AND DETAILED SOLUTIONS JUST RELEASED
NYC Radio Repair Mechanic Exam
The NYC Radio Repair Mechanic Exam is a civil service examination administered by the New York City
Department of Citywide Administrative Services for Radio Repair Mechanic positions in NYC agencies.
The exam focuses on installing, maintaining, troubleshooting, and repairing radio communication and
electronic systems.
Exam Coverage
Radio Communications Systems – Land mobile radio systems, UHF and VHF communications, analog
and digital radio equipment, radio transmitters, receivers, repeaters, and communication networks.
Electronics Fundamentals – AC/DC theory, voltage, current, resistance, capacitance, inductance,
semiconductors, transistors, integrated circuits, and electronic troubleshooting.
Radio Frequency (RF) Theory – RF propagation, frequencies, modulation methods, antennas, signal
strength, interference, and communication performance.
Radio Equipment Troubleshooting – Diagnosing electronic faults, signal tracing, circuit analysis,
component testing, equipment repair, and performance verification.
Test Equipment Usage – Multimeters, oscilloscopes, signal generators, wattmeters, SWR meters,
frequency counters, and diagnostic instruments.
Antennas & Transmission Systems – Antenna installation, antenna testing, feedlines, impedance
matching, standing wave ratio (SWR), and transmission efficiency.
Digital Communications Systems – Digital radio systems, trunked radio systems, communication
protocols, and public safety communications.
Schematics & Blueprint Reading – Reading electronic diagrams, wiring schematics, technical manuals,
circuit layouts, and manufacturer documentation.
FCC Rules & Communications Regulations – Federal communications requirements, radio operating
standards, licensing concepts, and communications regulations.
Electrical Safety & Workplace Safety – Electrical hazards, lockout/tagout awareness, safe work
practices, ladder safety, lifting procedures, and hazard recognition.
Audio, Video & Electronic Systems – Public address systems, intercom systems, CCTV equipment, audio
amplifiers, television systems, and electronic support equipment.
NYC Radio Repair Mechanic Exam
, Page 2 of 205
Question 1
A radio repair technician is measuring the resistance of a component in a circuit and obtains a reading of
zero ohms. The component should normally provide resistance to current flow. Which of the following is
the most likely cause of this condition and what is the appropriate corrective action?
A) Open circuit in the component; replace the component with a new one
B) Short circuit has developed across the component; locate and repair the short
C) Proper function of the component; no action is required
D) Overvoltage condition caused the component to fail; increase circuit voltage
Answer: B
Rationale: A zero ohm reading across a component that should provide resistance indicates a short
circuit has developed across it, bypassing the component. Short circuits allow excessive current flow and
can damage other components. The technician must locate and repair the short circuit to restore
normal circuit operation .
, Page 3 of 205
Question 2
A mechanic needs to calculate the current flowing through a radio circuit after measuring 12 volts across
a 4-ohm resistor. Which fundamental electrical law should be applied to determine the correct value?
A) Kirchhoff's Voltage Law
B) Faraday's Law of Induction
C) Ohm's Law
D) Coulomb's Law
Answer: C
Rationale: Ohm's Law defines the relationship between voltage, current, and resistance: I = V/R. With 12
volts across 4 ohms, the current is 3 amperes. This fundamental relationship is essential for
troubleshooting and repairing radio circuits .
Question 3
Which component in a radio circuit is primarily used to store electrical energy in an electric field and
release it when needed for filtering or tuning applications?
, Page 4 of 205
A) Resistor
B) Capacitor
C) Inductor
D) Diode
Answer: B
Rationale: A capacitor stores electrical energy in an electric field between its plates. In radio circuits,
capacitors are used for filtering, coupling, decoupling, and tuning applications .
Question 4
During routine preventive maintenance inspection of a municipal base station, a technician measures a
Voltage Standing Wave Ratio (VSWR) of 3.5:1 at the transmitter output. What does this measurement
indicate about the transmission system?
A) The transmission system is perfectly matched and delivering maximum power to the antenna
B) A significant portion of the transmitted power is being reflected back to the transmitter
