NYC DCAS ELECTRICIAN EXAM (NYC
CIVIL SERVICE ELECTRICIAN)
EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR JUST RELEASED
The NYC DCAS Electrician Examination is a competitive civil service examination administered by the New York
City Department of Citywide Administrative Services (DCAS) to establish eligible hiring lists for City Electrician
positions across various NYC agencies. The examination evaluates whether candidates possess the knowledge,
judgment, technical skills, safety awareness, troubleshooting ability, code knowledge, and practical electrical
experience required to install, maintain, repair, inspect, and troubleshoot commercial and industrial electrical
systems used throughout New York City government facilities. Official examination details, eligibility requirements,
and test announcements are published in the applicable Notice of Examination (NOE).
Exam Coverage
Electrical Theory – Apply electrical fundamentals including voltage, current, resistance, power, impedance,
AC/DC principles, and circuit calculations.
Electrical Calculations – Perform Ohm's Law, power formulas, conductor sizing, voltage-drop
calculations, transformer calculations, and load computations.
National Electrical Code & NYC Electrical Requirements – Apply code requirements governing safe
installation, grounding, overcurrent protection, wiring methods, equipment, and occupancy requirements.
Electrical Safety – Identify safe work practices, lockout/tagout, PPE selection, arc-flash awareness,
electrical hazards, and emergency response.
Wiring Methods – Select proper raceways, conductors, boxes, fittings, cable assemblies, supports, and
installation techniques.
Grounding and Bonding – Understand grounding electrode systems, equipment grounding conductors,
bonding methods, fault-current paths, and electrical safety.
Motors and Motor Controls – Diagnose motor circuits, starters, overload protection, reversing circuits,
variable-frequency drives, and troubleshooting techniques.
Transformers – Understand transformer operation, polarity, ratings, efficiency, troubleshooting, and
installation.
Blueprint Reading – Interpret electrical plans, symbols, diagrams, schedules, riser diagrams, and
specifications.
, Electrical Equipment – Install and maintain switchgear, panelboards, disconnects, generators, lighting
systems, receptacles, and controls.
Troubleshooting – Diagnose electrical faults using systematic testing procedures and appropriate
instruments.
Electrical Test Instruments – Properly use multimeters, clamp meters, insulation testers, continuity
testers, and voltage testers.
Lighting Systems – Install and troubleshoot interior, exterior, emergency, and specialty lighting systems.
Construction Practices – Apply workmanship standards, material handling, installation sequencing, and
quality assurance.
Maintenance Practices – Perform preventive maintenance, inspections, repairs, and documentation.
Mathematics – Solve arithmetic, algebraic, geometry, fractions, decimals, percentages, ratios, and
measurement conversion problems.
Supervision and Work Planning – Organize work assignments, prioritize repairs, coordinate personnel,
and manage resources effectively.
Communication – Interpret work orders, prepare reports, communicate hazards, and coordinate with
supervisors and other trades.
Workplace Procedures – Follow departmental policies, ethical standards, public service expectations, and
documentation requirements.
1.
While troubleshooting a three-phase motor that
repeatedly trips its overload protection shortly after
startup, you verify that supply voltage is balanced and
within acceptable limits. Which condition is the most
likely cause of the repeated overload trip?
A. The motor frame is painted.
B. One bearing is partially seized, increasing mechanical
load.
C. The conduit is larger than required.
D. The disconnect switch is mounted too high.
,Answer: B
Rationale: A seized bearing increases mechanical
resistance, causing excessive current draw and overload
operation despite normal supply voltage.
2.
An electrician measures 240 volts across a branch circuit
supplying a resistance heater that draws 20 amperes
during normal operation. Approximately how much
electrical power is the heater consuming?
A. 2,400 watts
B. 3,600 watts
C. 4,800 watts
D. 5,600 watts
Answer: C
Rationale: Power equals voltage multiplied by current: 240
× 20 = 4,800 watts.
3.
During preventive maintenance of a distribution panel, a
supervisor instructs you to replace a damaged breaker.
What should always occur before removing the panel
cover and beginning the replacement?
, A. Tighten every terminal in the panel.
B. De-energize the equipment, verify absence of voltage,
and apply lockout/tagout procedures.
C. Disconnect only the neutral conductor.
D. Spray the panel interior with lubricant.
Answer: B
Rationale: Proper lockout/tagout and voltage verification
are essential to protect workers from electrical hazards.
4.
A maintenance crew reports that only one phase of a
three-phase lighting panel has lost power while the
remaining phases continue operating normally. Which
component should be inspected first?
A. Lighting fixtures.
B. Phase conductor or protective device serving the
affected phase.
C. Ground rod.
D. Wall switches throughout the building.
Answer: B
Rationale: Loss of a single phase commonly results from an
open conductor, blown fuse, or failed breaker.
CIVIL SERVICE ELECTRICIAN)
EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR JUST RELEASED
The NYC DCAS Electrician Examination is a competitive civil service examination administered by the New York
City Department of Citywide Administrative Services (DCAS) to establish eligible hiring lists for City Electrician
positions across various NYC agencies. The examination evaluates whether candidates possess the knowledge,
judgment, technical skills, safety awareness, troubleshooting ability, code knowledge, and practical electrical
experience required to install, maintain, repair, inspect, and troubleshoot commercial and industrial electrical
systems used throughout New York City government facilities. Official examination details, eligibility requirements,
and test announcements are published in the applicable Notice of Examination (NOE).
Exam Coverage
Electrical Theory – Apply electrical fundamentals including voltage, current, resistance, power, impedance,
AC/DC principles, and circuit calculations.
Electrical Calculations – Perform Ohm's Law, power formulas, conductor sizing, voltage-drop
calculations, transformer calculations, and load computations.
National Electrical Code & NYC Electrical Requirements – Apply code requirements governing safe
installation, grounding, overcurrent protection, wiring methods, equipment, and occupancy requirements.
Electrical Safety – Identify safe work practices, lockout/tagout, PPE selection, arc-flash awareness,
electrical hazards, and emergency response.
Wiring Methods – Select proper raceways, conductors, boxes, fittings, cable assemblies, supports, and
installation techniques.
Grounding and Bonding – Understand grounding electrode systems, equipment grounding conductors,
bonding methods, fault-current paths, and electrical safety.
Motors and Motor Controls – Diagnose motor circuits, starters, overload protection, reversing circuits,
variable-frequency drives, and troubleshooting techniques.
Transformers – Understand transformer operation, polarity, ratings, efficiency, troubleshooting, and
installation.
Blueprint Reading – Interpret electrical plans, symbols, diagrams, schedules, riser diagrams, and
specifications.
, Electrical Equipment – Install and maintain switchgear, panelboards, disconnects, generators, lighting
systems, receptacles, and controls.
Troubleshooting – Diagnose electrical faults using systematic testing procedures and appropriate
instruments.
Electrical Test Instruments – Properly use multimeters, clamp meters, insulation testers, continuity
testers, and voltage testers.
Lighting Systems – Install and troubleshoot interior, exterior, emergency, and specialty lighting systems.
Construction Practices – Apply workmanship standards, material handling, installation sequencing, and
quality assurance.
Maintenance Practices – Perform preventive maintenance, inspections, repairs, and documentation.
Mathematics – Solve arithmetic, algebraic, geometry, fractions, decimals, percentages, ratios, and
measurement conversion problems.
Supervision and Work Planning – Organize work assignments, prioritize repairs, coordinate personnel,
and manage resources effectively.
Communication – Interpret work orders, prepare reports, communicate hazards, and coordinate with
supervisors and other trades.
Workplace Procedures – Follow departmental policies, ethical standards, public service expectations, and
documentation requirements.
1.
While troubleshooting a three-phase motor that
repeatedly trips its overload protection shortly after
startup, you verify that supply voltage is balanced and
within acceptable limits. Which condition is the most
likely cause of the repeated overload trip?
A. The motor frame is painted.
B. One bearing is partially seized, increasing mechanical
load.
C. The conduit is larger than required.
D. The disconnect switch is mounted too high.
,Answer: B
Rationale: A seized bearing increases mechanical
resistance, causing excessive current draw and overload
operation despite normal supply voltage.
2.
An electrician measures 240 volts across a branch circuit
supplying a resistance heater that draws 20 amperes
during normal operation. Approximately how much
electrical power is the heater consuming?
A. 2,400 watts
B. 3,600 watts
C. 4,800 watts
D. 5,600 watts
Answer: C
Rationale: Power equals voltage multiplied by current: 240
× 20 = 4,800 watts.
3.
During preventive maintenance of a distribution panel, a
supervisor instructs you to replace a damaged breaker.
What should always occur before removing the panel
cover and beginning the replacement?
, A. Tighten every terminal in the panel.
B. De-energize the equipment, verify absence of voltage,
and apply lockout/tagout procedures.
C. Disconnect only the neutral conductor.
D. Spray the panel interior with lubricant.
Answer: B
Rationale: Proper lockout/tagout and voltage verification
are essential to protect workers from electrical hazards.
4.
A maintenance crew reports that only one phase of a
three-phase lighting panel has lost power while the
remaining phases continue operating normally. Which
component should be inspected first?
A. Lighting fixtures.
B. Phase conductor or protective device serving the
affected phase.
C. Ground rod.
D. Wall switches throughout the building.
Answer: B
Rationale: Loss of a single phase commonly results from an
open conductor, blown fuse, or failed breaker.
