Transit Railcar Maintenance Technician Master Exam
Prep | Practice Questions & Rationales 2026/2027
1. What is the primary purpose of a railcar truck assembly?
A) Provide passenger seating
B) Support and guide the railcar on tracks
C) Supply electrical power
D) Control braaking system only
Answer: B) Support and guide the railcar on tracks
Rationale: The truck assembly supports the car body, houses wheelsets, and ensures
stable guidance along the rails. It is one of the most critical structural components of the
railcar .
2. What component directly connects the wheel to the axle?
A) Brake shoe
B) Journal bearing
C) Wheel hub
D) Coupler knuckle
Answer: C) Wheel hub
Rationale: The wheel hub is the mounting point that secures the wheel to the axle
assembly .
3. What does a bogie refer to in railcar terminology?
A) Passenger seat row
B) Wheel and axle assembly
C) Brake control panel
D) Electrical cabinet
Answer: B) Wheel and axle assembly
Rationale: A bogie is another term for the truck assembly under railcars .
,4. What is the purpose of railcar suspension systems?
A) Increase electrical load
B) Reduce shock and vibration
C) Improve lighting
D) Control braking force
Answer: B) Reduce shock and vibration
Rationale: Suspension systems absorb track irregularities and improve ride comfort.
They include springs and dampers that reduce mechanical stress on the railcar .
5. What is the most common cause of wheel flat spots?
A) Excess lubrication
B) Wheel slip during braking
C) Overcharging batteries
D) Excess air pressure
Answer: B) Wheel slip during braking
Rationale: Flat spots commonly result from wheels locking and sliding during braking .
6. What tool is commonly used to measure wheel diameter wear?
A) Multimeter
B) Wheel caliper gauge
C) Torque wrench
D) Pressure gauge
Answer: B) Wheel caliper gauge
Rationale: Caliper gauges measure wheel diameter to detect wear limits .
7. What is wheel gauge measured between?
A) Rail head to rail base
B) Inside edges of rails
,C) Outside edges of wheels
D) Coupler centers
Answer: B) Inside edges of rails
Rationale: Gauge is the distance between the inner faces of the rails .
8. What condition does wheel tread hollowing indicate?
A) Excess lubrication
B) Uneven wear pattern
C) Electrical failure
D) Brake release failure only
Answer: B) Uneven wear pattern
Rationale: Hollow tread wear results from uneven contact between wheel and rail .
9. What does a seized bearing typically produce?
A) Low noise levels
B) Excessive heat and noise
C) Increased lubrication
D) Smooth wheel rotation
Answer: B) Excessive heat and noise
Rationale: Seized bearings generate heat, noise, and may stop rotation, leading to
potential derailment hazards .
10. What is the primary cause of wheel flange wear?
A) Excessive speed
B) Negotiating curves
C) Over-braking
D) Electrical arcing
Answer: B) Negotiating curves
, Rationale: Wheel flange wear is primarily caused by the lateral forces experienced when
negotiating curves.
11. What is the function of a journal bearing in a railcar truck?
A) Connect the wheels to the axle
B) Support the axle and reduce friction
C) Apply braking force
D) Transfer electrical power
Answer: B) Support the axle and reduce friction
Rationale: Journal bearings support the axle ends and reduce friction between the axle
and the truck frame.
12. What is the purpose of rail lubrication systems?
A) Increase braking force
B) Reduce wheel-rail friction
C) Increase speed
D) Control door operation
Answer: B) Reduce wheel-rail friction
Rationale: Rail lubrication systems reduce friction between wheels and rails, decreasing
wear and noise.
13. What is a common sign of wheel flange wear beyond tolerance?
A) Reduced ability to guide railcar on tracks
B) Improved ride quality
C) Reduced noise
D) Increased wheel diameter
Answer: A) Reduced ability to guide railcar on tracks
Rationale: Worn flanges reduce the ability to guide the railcar on tracks, increasing
derailment risk.
Prep | Practice Questions & Rationales 2026/2027
1. What is the primary purpose of a railcar truck assembly?
A) Provide passenger seating
B) Support and guide the railcar on tracks
C) Supply electrical power
D) Control braaking system only
Answer: B) Support and guide the railcar on tracks
Rationale: The truck assembly supports the car body, houses wheelsets, and ensures
stable guidance along the rails. It is one of the most critical structural components of the
railcar .
2. What component directly connects the wheel to the axle?
A) Brake shoe
B) Journal bearing
C) Wheel hub
D) Coupler knuckle
Answer: C) Wheel hub
Rationale: The wheel hub is the mounting point that secures the wheel to the axle
assembly .
3. What does a bogie refer to in railcar terminology?
A) Passenger seat row
B) Wheel and axle assembly
C) Brake control panel
D) Electrical cabinet
Answer: B) Wheel and axle assembly
Rationale: A bogie is another term for the truck assembly under railcars .
,4. What is the purpose of railcar suspension systems?
A) Increase electrical load
B) Reduce shock and vibration
C) Improve lighting
D) Control braking force
Answer: B) Reduce shock and vibration
Rationale: Suspension systems absorb track irregularities and improve ride comfort.
They include springs and dampers that reduce mechanical stress on the railcar .
5. What is the most common cause of wheel flat spots?
A) Excess lubrication
B) Wheel slip during braking
C) Overcharging batteries
D) Excess air pressure
Answer: B) Wheel slip during braking
Rationale: Flat spots commonly result from wheels locking and sliding during braking .
6. What tool is commonly used to measure wheel diameter wear?
A) Multimeter
B) Wheel caliper gauge
C) Torque wrench
D) Pressure gauge
Answer: B) Wheel caliper gauge
Rationale: Caliper gauges measure wheel diameter to detect wear limits .
7. What is wheel gauge measured between?
A) Rail head to rail base
B) Inside edges of rails
,C) Outside edges of wheels
D) Coupler centers
Answer: B) Inside edges of rails
Rationale: Gauge is the distance between the inner faces of the rails .
8. What condition does wheel tread hollowing indicate?
A) Excess lubrication
B) Uneven wear pattern
C) Electrical failure
D) Brake release failure only
Answer: B) Uneven wear pattern
Rationale: Hollow tread wear results from uneven contact between wheel and rail .
9. What does a seized bearing typically produce?
A) Low noise levels
B) Excessive heat and noise
C) Increased lubrication
D) Smooth wheel rotation
Answer: B) Excessive heat and noise
Rationale: Seized bearings generate heat, noise, and may stop rotation, leading to
potential derailment hazards .
10. What is the primary cause of wheel flange wear?
A) Excessive speed
B) Negotiating curves
C) Over-braking
D) Electrical arcing
Answer: B) Negotiating curves
, Rationale: Wheel flange wear is primarily caused by the lateral forces experienced when
negotiating curves.
11. What is the function of a journal bearing in a railcar truck?
A) Connect the wheels to the axle
B) Support the axle and reduce friction
C) Apply braking force
D) Transfer electrical power
Answer: B) Support the axle and reduce friction
Rationale: Journal bearings support the axle ends and reduce friction between the axle
and the truck frame.
12. What is the purpose of rail lubrication systems?
A) Increase braking force
B) Reduce wheel-rail friction
C) Increase speed
D) Control door operation
Answer: B) Reduce wheel-rail friction
Rationale: Rail lubrication systems reduce friction between wheels and rails, decreasing
wear and noise.
13. What is a common sign of wheel flange wear beyond tolerance?
A) Reduced ability to guide railcar on tracks
B) Improved ride quality
C) Reduced noise
D) Increased wheel diameter
Answer: A) Reduced ability to guide railcar on tracks
Rationale: Worn flanges reduce the ability to guide the railcar on tracks, increasing
derailment risk.
