TRANSIT RAILCAR MAINTENANCE
TECHNICIAN
350-QUESTION PRACTICE EXAM — VOLUME 2
Advanced Maintenance, Troubleshooting & Safety Review • 2026
Questions 350
Format Multiple-choice + applied troubleshooting
Answers Clearly marked in blue
Coverage 8 core areas + scenario-based review
A second related practice set designed for additional review of railcar maintenance systems,
diagnostics, safety controls, and service-readiness checks.
,Transit Railcar Maintenance Technician — Volume 2
TABLE OF CONTENTS
1. Electrical Troubleshooting & Controls — 25 Questions
2. Traction & Propulsion Maintenance — 25 Questions
3. Brake Equipment & Testing — 25 Questions
4. Pneumatic, HVAC & Auxiliary Equipment — 25 Questions
5. Running Gear, Couplers & Mechanical Inspection — 25 Questions
6. Safety, LOTO & Maintenance Quality — 25 Questions
7. Diagnostics & Failure Analysis — 25 Questions
8. Service Readiness & Final Inspection — 25 Questions
Applied Troubleshooting Scenarios — 150 Questions
2026 Edition Page 2
,Transit Railcar Maintenance Technician — Volume 2
1. Electrical Troubleshooting & Controls
1. A circuit breaker trips immediately after reset. What should be suspected first?
A. A persistent overload or short circuit
B. Bent, corroded, or loose pins can interrupt signals
C. An unintended low-resistance path for current
D. De-energize and isolate the circuit
ANSWER: A. A persistent overload or short circuit
2. Why should a replacement fuse match the specified rating?
A. To preserve the designed circuit protection
B. De-energize and isolate the circuit
C. High resistance in a connection or conductor
D. A persistent overload or short circuit
ANSWER: A. To preserve the designed circuit protection
3. What does continuity testing verify?
A. To preserve the designed circuit protection
B. Short circuits, leakage, or shock hazards
C. Whether a conductive path exists between two points
D. Heating, arcing, or intermittent operation
ANSWER: C. Whether a conductive path exists between two points
4. What should be done before resistance testing?
A. Switch a higher-power circuit under control
B. An unintended low-resistance path for current
C. Bent, corroded, or loose pins can interrupt signals
D. De-energize and isolate the circuit
ANSWER: D. De-energize and isolate the circuit
5. What can a loose terminal produce?
A. A fault that appears and disappears
B. Increased resistance and unreliable signals
C. Heating, arcing, or intermittent operation
D. An electrical or electronic command used to operate equipment
ANSWER: C. Heating, arcing, or intermittent operation
6. What does a relay allow?
A. An interrupted electrical path
B. A protection fault may be causing the symptom
C. To trace circuits and identify expected connections
D. A low-power control circuit to switch another circuit
ANSWER: D. A low-power control circuit to switch another circuit
7. What is the purpose of a contactor?
A. Bent, corroded, or loose pins can interrupt signals
B. Switch a higher-power circuit under control
C. An electrical or electronic command used to operate equipment
D. Heating, arcing, or intermittent operation
ANSWER: B. Switch a higher-power circuit under control
2026 Edition Page 3
, Transit Railcar Maintenance Technician — Volume 2
8. What can excessive voltage drop indicate?
A. High resistance in a connection or conductor
B. A standardized graphic representing an electrical component
C. Short circuits, leakage, or shock hazards
D. Electrical quantities such as voltage, resistance, and continuity
ANSWER: A. High resistance in a connection or conductor
9. What is a ground fault?
A. Switch a higher-power circuit under control
B. Poor grounding can cause unreliable operation and faults
C. Short circuits, leakage, or shock hazards
D. An unintended connection between an energized circuit and ground
ANSWER: D. An unintended connection between an energized circuit and ground
10. Why inspect connector pins?
A. To preserve the designed circuit protection
B. To confirm the repaired system operates correctly
C. The original fault may be elsewhere in the circuit
D. Bent, corroded, or loose pins can interrupt signals
ANSWER: D. Bent, corroded, or loose pins can interrupt signals
11. What does a multimeter measure?
A. Short circuits, leakage, or shock hazards
B. The original fault may be elsewhere in the circuit
C. To confirm the repaired system operates correctly
D. Electrical quantities such as voltage, resistance, and continuity
ANSWER: D. Electrical quantities such as voltage, resistance, and continuity
12. Why use a wiring schematic?
A. To trace circuits and identify expected connections
B. A wiring or connection fault may prevent power from reaching the load
C. The original fault may be elsewhere in the circuit
D. A fault that appears and disappears
ANSWER: A. To trace circuits and identify expected connections
13. What can damaged insulation cause?
A. Switch a higher-power circuit under control
B. Short circuits, leakage, or shock hazards
C. A standardized graphic representing an electrical component
D. An electrical or electronic command used to operate equipment
ANSWER: B. Short circuits, leakage, or shock hazards
14. Why verify power at the load and not only the source?
A. To trace circuits and identify expected connections
B. A wiring or connection fault may prevent power from reaching the load
C. High resistance in a connection or conductor
D. To support diagnosis and future comparison
ANSWER: B. A wiring or connection fault may prevent power from reaching the load
2026 Edition Page 4
TECHNICIAN
350-QUESTION PRACTICE EXAM — VOLUME 2
Advanced Maintenance, Troubleshooting & Safety Review • 2026
Questions 350
Format Multiple-choice + applied troubleshooting
Answers Clearly marked in blue
Coverage 8 core areas + scenario-based review
A second related practice set designed for additional review of railcar maintenance systems,
diagnostics, safety controls, and service-readiness checks.
,Transit Railcar Maintenance Technician — Volume 2
TABLE OF CONTENTS
1. Electrical Troubleshooting & Controls — 25 Questions
2. Traction & Propulsion Maintenance — 25 Questions
3. Brake Equipment & Testing — 25 Questions
4. Pneumatic, HVAC & Auxiliary Equipment — 25 Questions
5. Running Gear, Couplers & Mechanical Inspection — 25 Questions
6. Safety, LOTO & Maintenance Quality — 25 Questions
7. Diagnostics & Failure Analysis — 25 Questions
8. Service Readiness & Final Inspection — 25 Questions
Applied Troubleshooting Scenarios — 150 Questions
2026 Edition Page 2
,Transit Railcar Maintenance Technician — Volume 2
1. Electrical Troubleshooting & Controls
1. A circuit breaker trips immediately after reset. What should be suspected first?
A. A persistent overload or short circuit
B. Bent, corroded, or loose pins can interrupt signals
C. An unintended low-resistance path for current
D. De-energize and isolate the circuit
ANSWER: A. A persistent overload or short circuit
2. Why should a replacement fuse match the specified rating?
A. To preserve the designed circuit protection
B. De-energize and isolate the circuit
C. High resistance in a connection or conductor
D. A persistent overload or short circuit
ANSWER: A. To preserve the designed circuit protection
3. What does continuity testing verify?
A. To preserve the designed circuit protection
B. Short circuits, leakage, or shock hazards
C. Whether a conductive path exists between two points
D. Heating, arcing, or intermittent operation
ANSWER: C. Whether a conductive path exists between two points
4. What should be done before resistance testing?
A. Switch a higher-power circuit under control
B. An unintended low-resistance path for current
C. Bent, corroded, or loose pins can interrupt signals
D. De-energize and isolate the circuit
ANSWER: D. De-energize and isolate the circuit
5. What can a loose terminal produce?
A. A fault that appears and disappears
B. Increased resistance and unreliable signals
C. Heating, arcing, or intermittent operation
D. An electrical or electronic command used to operate equipment
ANSWER: C. Heating, arcing, or intermittent operation
6. What does a relay allow?
A. An interrupted electrical path
B. A protection fault may be causing the symptom
C. To trace circuits and identify expected connections
D. A low-power control circuit to switch another circuit
ANSWER: D. A low-power control circuit to switch another circuit
7. What is the purpose of a contactor?
A. Bent, corroded, or loose pins can interrupt signals
B. Switch a higher-power circuit under control
C. An electrical or electronic command used to operate equipment
D. Heating, arcing, or intermittent operation
ANSWER: B. Switch a higher-power circuit under control
2026 Edition Page 3
, Transit Railcar Maintenance Technician — Volume 2
8. What can excessive voltage drop indicate?
A. High resistance in a connection or conductor
B. A standardized graphic representing an electrical component
C. Short circuits, leakage, or shock hazards
D. Electrical quantities such as voltage, resistance, and continuity
ANSWER: A. High resistance in a connection or conductor
9. What is a ground fault?
A. Switch a higher-power circuit under control
B. Poor grounding can cause unreliable operation and faults
C. Short circuits, leakage, or shock hazards
D. An unintended connection between an energized circuit and ground
ANSWER: D. An unintended connection between an energized circuit and ground
10. Why inspect connector pins?
A. To preserve the designed circuit protection
B. To confirm the repaired system operates correctly
C. The original fault may be elsewhere in the circuit
D. Bent, corroded, or loose pins can interrupt signals
ANSWER: D. Bent, corroded, or loose pins can interrupt signals
11. What does a multimeter measure?
A. Short circuits, leakage, or shock hazards
B. The original fault may be elsewhere in the circuit
C. To confirm the repaired system operates correctly
D. Electrical quantities such as voltage, resistance, and continuity
ANSWER: D. Electrical quantities such as voltage, resistance, and continuity
12. Why use a wiring schematic?
A. To trace circuits and identify expected connections
B. A wiring or connection fault may prevent power from reaching the load
C. The original fault may be elsewhere in the circuit
D. A fault that appears and disappears
ANSWER: A. To trace circuits and identify expected connections
13. What can damaged insulation cause?
A. Switch a higher-power circuit under control
B. Short circuits, leakage, or shock hazards
C. A standardized graphic representing an electrical component
D. An electrical or electronic command used to operate equipment
ANSWER: B. Short circuits, leakage, or shock hazards
14. Why verify power at the load and not only the source?
A. To trace circuits and identify expected connections
B. A wiring or connection fault may prevent power from reaching the load
C. High resistance in a connection or conductor
D. To support diagnosis and future comparison
ANSWER: B. A wiring or connection fault may prevent power from reaching the load
2026 Edition Page 4
