NYC RADIO REPAIR MECHANIC
EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR JUST RELEASED
exam coverage
Electronic fundamentals — electrical theory, voltage/current
relationships, resistance, power calculations, signal behavior.
Radio communications systems — RF principles, modulation,
propagation, transmission and reception.
Electronic components and circuits — identification, operation,
testing, and failure analysis.
Troubleshooting and diagnostics — systematic fault isolation
and repair procedures.
Test equipment usage — multimeters, oscilloscopes, signal
generators, spectrum analyzers, wattmeters.
Radio installation and maintenance — system setup, alignment,
preventive maintenance practices.
Digital and analog communications — interpreting signals and
maintaining mixed systems.
Safety and regulations — electrical safety, workplace procedures,
equipment handling.
Technical interpretation — diagrams, schematics, manuals, and
specifications.
, Workplace judgment — prioritization, documentation, and
operational decision-making.
1.
A mobile radio repeatedly loses transmission capability
only after thirty minutes of operation while receiving
remains normal. Which troubleshooting action should be
performed first?
A. Replace the antenna immediately
B. Measure output stage temperature and supply stability
C. Increase transmitter power permanently
D. Reset all programming
Answer: B
Rationale: Heat-related failures commonly appear after
extended operation; confirming thermal and power
conditions isolates root causes efficiently.
2.
A technician measures excessive voltage drop across a
connector supplying a repeater cabinet. What is the most
likely implication?
A. Excess resistance at the connection
B. Improved power efficiency
C. Reduced current demand
D. Excess antenna gain
,Answer: A
Rationale: Significant voltage drop usually indicates
resistance caused by corrosion, looseness, or damaged
conductors.
3.
During preventive maintenance, measured standing wave
ratio suddenly increases although transmitter output
remains unchanged. What should be suspected first?
A. Damaged feedline or antenna mismatch
B. Faulty battery charger
C. Incorrect audio gain
D. Defective speaker
Answer: A
Rationale: Elevated SWR commonly indicates
transmission path mismatch reducing efficient energy
transfer.
4.
A digital communication unit intermittently fails despite
normal visual inspection. Which diagnostic method
provides the strongest evidence?
, A. Random component replacement
B. Controlled signal tracing through stages
C. Cleaning all connectors only
D. Reprogramming immediately
Answer: B
Rationale: Structured signal tracing identifies where
expected signal characteristics change.
5.
When interpreting an electronic schematic, resistor values
primarily assist the mechanic in determining:
A. Circuit operating conditions
B. Enclosure dimensions
C. Cable color only
D. Frequency licensing
Answer: A
Rationale: Resistance values influence current flow and
expected circuit behavior.
6.
A radio receiver produces static even without input
signals. Which area should be evaluated first?
EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR JUST RELEASED
exam coverage
Electronic fundamentals — electrical theory, voltage/current
relationships, resistance, power calculations, signal behavior.
Radio communications systems — RF principles, modulation,
propagation, transmission and reception.
Electronic components and circuits — identification, operation,
testing, and failure analysis.
Troubleshooting and diagnostics — systematic fault isolation
and repair procedures.
Test equipment usage — multimeters, oscilloscopes, signal
generators, spectrum analyzers, wattmeters.
Radio installation and maintenance — system setup, alignment,
preventive maintenance practices.
Digital and analog communications — interpreting signals and
maintaining mixed systems.
Safety and regulations — electrical safety, workplace procedures,
equipment handling.
Technical interpretation — diagrams, schematics, manuals, and
specifications.
, Workplace judgment — prioritization, documentation, and
operational decision-making.
1.
A mobile radio repeatedly loses transmission capability
only after thirty minutes of operation while receiving
remains normal. Which troubleshooting action should be
performed first?
A. Replace the antenna immediately
B. Measure output stage temperature and supply stability
C. Increase transmitter power permanently
D. Reset all programming
Answer: B
Rationale: Heat-related failures commonly appear after
extended operation; confirming thermal and power
conditions isolates root causes efficiently.
2.
A technician measures excessive voltage drop across a
connector supplying a repeater cabinet. What is the most
likely implication?
A. Excess resistance at the connection
B. Improved power efficiency
C. Reduced current demand
D. Excess antenna gain
,Answer: A
Rationale: Significant voltage drop usually indicates
resistance caused by corrosion, looseness, or damaged
conductors.
3.
During preventive maintenance, measured standing wave
ratio suddenly increases although transmitter output
remains unchanged. What should be suspected first?
A. Damaged feedline or antenna mismatch
B. Faulty battery charger
C. Incorrect audio gain
D. Defective speaker
Answer: A
Rationale: Elevated SWR commonly indicates
transmission path mismatch reducing efficient energy
transfer.
4.
A digital communication unit intermittently fails despite
normal visual inspection. Which diagnostic method
provides the strongest evidence?
, A. Random component replacement
B. Controlled signal tracing through stages
C. Cleaning all connectors only
D. Reprogramming immediately
Answer: B
Rationale: Structured signal tracing identifies where
expected signal characteristics change.
5.
When interpreting an electronic schematic, resistor values
primarily assist the mechanic in determining:
A. Circuit operating conditions
B. Enclosure dimensions
C. Cable color only
D. Frequency licensing
Answer: A
Rationale: Resistance values influence current flow and
expected circuit behavior.
6.
A radio receiver produces static even without input
signals. Which area should be evaluated first?
