“150”, Aptitude Test Questions and Answers for Technician II (Carriage and Wagon Examiner) – TRC.
ABSTRACT
This preparation material contains 150
advanced multiple-choice aptitude test questions and answers designed for
candidates preparing for the Technician II (Carriage and Wagon Examiner)
position at Tanzania Railways Corporation (TRC). The questions cover
carriage and wagon examination, rolling stock maintenance, braking systems,
wheelsets, bearings, suspension, couplers, workshop machinery, refrigeration
and air-conditioning systems, handling equipment, fault diagnosis, safety, and preventive
maintenance. The questions are designed to test practical understanding,
technical reasoning, fault identification, and the ability to apply mechanical
principles in railway maintenance situations. Each question is accompanied by
the correct answer and a detailed rationale to help candidates understand the
underlying technical concepts and improve their performance in online aptitude
examinations.
Prepared by Technician II (Carriage and
Wagon Examiner) – TRC.
Compiled by Technician II (Carriage and
Wagon Examiner) – TRC.
0628729934.
Date: September 18, 2026
Dear applicants,
This collection of questions and answers
has been prepared to help all of you to understand the key areas tested during
the interview. The goal is to provide a useful, and practical study guide so
you can all perform confidently and fairly in the selection process. I wish you
the best of luck, and may this resource support you in achieving success!
Warm regards,
Technician II (Carriage and Wagon Examiner)
– TRC.
For Personal Use by Applicants Preparing
for Technician II (Carriage and Wagon Examiner) – TRC - at Public Service
Recruitment Service.
Technician II (Carriage
and Wagon Examiner) – TRC.
150 Aptitude
Test Questions and Answers
1. During examination of a freight wagon, a
technician observes that one wheel on an axle has significantly more flange
wear than the corresponding wheel. Inspection also indicates that braking force
is not being applied evenly to the two wheels. Which condition would be the MOST
appropriate area for further investigation?
A. Unequal
brake-block clearance or rigging adjustment B. Excessive lubrication of the
axle bearing C. Low pressure in the main reservoir D. Loose fastening of the
wagon roof
Answer: A.
Unequal brake-block clearance or rigging adjustment
Rationale: When abnormal wheel wear is accompanied
by evidence that braking is not being applied evenly, the brake rigging and
block clearances should be investigated for restricted movement, incorrect
adjustment, or unequal application. Such a condition can produce different
frictional and thermal loading on the wheels and contribute to abnormal wear.
The other options do not provide a similarly direct explanation for the
observed asymmetric braking-related condition.
2. A wagon is found to have a bearing whose
temperature rises progressively during operation, while the bearing initially
appeared satisfactory during a stationary inspection. Which finding would
provide the STRONGEST indication of developing bearing failure?
A. Clean exterior
surface around the axle box B. Abnormal noise accompanied by excessive radial
play C. Correct identification marking on the axle box D. Normal operation of
the wagon hand brake
Answer: B.
Abnormal noise accompanied by excessive radial play
Rationale: A combination of abnormal bearing noise
and excessive radial play is a strong indication of internal deterioration such
as raceway, rolling-element, cage, or clearance-related damage. A bearing can
appear visually acceptable while developing a serious internal defect that
becomes evident only when rotating or carrying load. The examiner should
therefore regard abnormal noise together with excessive play as a significant
mechanical warning requiring further investigation before the wagon is
released.
3. During a brake examination, the brake
cylinder responds when air pressure is applied, but the brake blocks on one
bogie do not apply with approximately the same force as those on the other
bogie. Which fault should receive the HIGHEST priority for investigation?
A. Defective
wagon body paintwork B. Incorrect position of the carriage roof C. Excessive
grease around the axle box D. Uneven or restricted brake rigging movement
Answer: D.
Uneven or restricted brake rigging movement
Rationale: If the brake cylinder responds but
braking force is not being transmitted equally through the brake rigging,
restricted movement, incorrect adjustment, seized components, or mechanical
obstruction in the rigging should be investigated. Effective braking depends
not only on pneumatic pressure but also on proper mechanical transmission of
the force to the brake blocks. An uneven brake application can create unsafe
braking performance, wheel damage, and abnormal wear, making the condition a
high-priority examination item.
4. A technician is examining a wagon after
it has operated for a long distance. One wheel shows a localized area of
discoloration and the corresponding brake block has evidence of overheating.
Which condition is the MOST likely mechanical concern?
A. Persistent
brake drag at that wheel B. Excessive suspension spring flexibility C.
Insufficient body-door lubrication D. Reduced coupler draft capacity
Answer: A.
Persistent brake drag at that wheel
Rationale: Persistent brake drag keeps the brake
block in contact with the wheel even when full braking is not required,
converting mechanical friction into heat. Prolonged heat generation can produce
wheel discoloration, thermal damage, accelerated wear, and in severe cases
wheel deformation or cracking. The localized nature of the overheating,
together with corresponding evidence on the brake block, makes brake drag the
most appropriate condition to investigate.
5. During inspection of a bogie, a
technician discovers that one suspension spring has a significantly reduced
free height compared with the corresponding spring on the same bogie. What is
the MOST important reason for investigating this condition before the
vehicle is released?
A. It may increase the refrigeration system
capacity B. It will always increase the reservoir pressure C. It will
automatically improve wheel adhesion D. It may alter load distribution and
running stability
Answer: D. It
may alter load distribution and running stability
Rationale: A significant difference in
suspension-spring condition can alter the distribution of vehicle load between
suspension elements and wheelsets. This may affect ride characteristics, wheel
loading, suspension geometry, and running stability. The examiner should
therefore determine the cause and assess the spring condition against the
applicable maintenance requirements before releasing the wagon.
6. A wagon develops repeated loosening of a
structural fastener despite the fastener initially being tightened correctly.
Inspection shows considerable vibration around the joint during operation.
Which mechanism BEST explains the repeated loosening?
A. Thermal
expansion of the brake pipe B. Vibration-induced loss of joint preload C.
Increased refrigerant pressure D. Reduced lubrication of the wheel flange
Answer: B.
Vibration-induced loss of joint preload
Rationale: Mechanical vibration can progressively
reduce the effective clamping force of a bolted joint, particularly when the
joint design, locking arrangement, preload, or surface conditions are
inadequate. Once preload is lost, relative movement between the joined
components can accelerate loosening and fatigue damage. Correct initial
tightening does not necessarily guarantee long-term security if the joint is
exposed to significant cyclic vibration.
7. While examining an axle bearing, a
technician finds grease that appears contaminated with foreign particles and
has a noticeably degraded texture. The bearing is still rotating without
obvious noise. What is the MOST appropriate conclusion?
A. The bearing is
satisfactory because no noise exists B. The bearing should be ignored until
vibration becomes severe C. The grease condition proves the wheel diameter is
incorrect D. Contamination may accelerate bearing wear and requires
investigation
Answer: D.
Contamination may accelerate bearing wear and requires investigation
Rationale: Contaminated lubricant can introduce
abrasive particles, moisture, or other contaminants into the bearing,
accelerating wear of rolling surfaces and other internal components. The
absence of noise at the moment of inspection does not prove that the bearing is
healthy because deterioration may still be developing. A competent examiner
should therefore investigate the source and extent of contamination and assess
the bearing in accordance with the applicable maintenance procedure.
8. A freight wagon has a hand brake that can
be applied normally, but after release the brake blocks remain lightly touching
the wheels. Which examination finding would MOST strongly support a
mechanical brake-release problem?
A. Excessive
clearance at the wagon door B. Restricted movement in the brake rigging C.
Normal operation of the suspension springs D. Correct pressure in the
auxiliary reservoir
Answer: B.
Restricted movement in the brake rigging
Rationale: When brake blocks remain in contact after
the brake has been released, restricted movement, seized joints, incorrect
adjustment, damaged components, or other mechanical problems in the brake
rigging can prevent the system from returning fully to its released position.
This condition can cause continuous friction, wheel heating, premature wear,
and increased resistance during movement. The examiner should therefore
investigate the mechanical transmission and return movement of the brake
system.
9. During inspection of a wagon wheelset, a
technician identifies a surface defect whose depth cannot be reliably assessed
by visual examination alone. What should be the MOST appropriate next step?
A. Release the
wagon because the wheel remains circular B. Apply additional grease to conceal
the defect C. Measure or assess the defect using an approved inspection method D.
Reduce the brake-cylinder pressure during operation
Answer: C.
Measure or assess the defect using an approved inspection method
Rationale: A wheel defect cannot safely be accepted
merely because its appearance does not seem severe. Where the size or depth of
a defect cannot be established visually, an appropriate measuring or approved
inspection technique should be used to determine whether it falls within
permissible limits. Wheel integrity is safety-critical because defects can
develop under repeated loading and may affect running performance or lead to
more serious damage.
10. A technician notices that a wagon
produces a repetitive vibration that increases with vehicle speed but is not
strongly affected by changes in engine output. Which area should receive PRIORITY
attention?
A. Rotating
wheelset or running-gear condition B. Carriage interior lighting arrangement C.
Refrigeration thermostat setting D. Wagon body paint thickness
Answer: A.
Rotating wheelset or running-gear condition
Rationale: A vibration that increases with vehicle
speed is characteristic of a problem associated with rotating or
speed-dependent components. In a wagon, wheelset condition, wheel profile,
imbalance, bearing condition, alignment, or other running-gear defects can
produce such symptoms. The fact that the vibration is related more strongly to
vehicle speed than to engine output makes the running gear a logical priority
for examination.
11. During workshop maintenance, a technician
is required to use a hydraulic jack to raise part of a railway vehicle. Which
practice is MOST important before personnel work beneath the raised vehicle?
A. Increase
hydraulic pressure beyond its rated value B. Depend solely on the hydraulic
jack for support C. Install suitable mechanical supports after raising the
vehicle D. Remove all wheel chocks before positioning the jack
Answer: C.
Install suitable mechanical supports after raising the vehicle
Rationale: Hydraulic jacks are lifting devices and
should not normally be relied upon as the sole means of supporting a raised
vehicle while personnel work underneath it. Mechanical supports of suitable
capacity and correct positioning provide stable support in the event of
hydraulic pressure loss or equipment failure. Safe lifting therefore requires
both correct lifting procedures and positive mechanical support before
personnel enter the danger area.
12. A workshop air compressor reaches its
normal pressure but then cycles unusually frequently even when the demand for
compressed air has not increased. Which fault is MOST consistent with
this observation?
A. A leak in the
compressed-air distribution system B. Excessive wagon wheel-flange lubrication C.
Reduced carriage suspension stiffness D. Incorrect coupling height between two
wagons
Answer: A. A
leak in the compressed-air distribution system
Rationale: Frequent compressor cycling without an
increase in legitimate air demand commonly indicates loss of compressed air
through leaks, defective valves, fittings, hoses, or other parts of the
pneumatic system. The compressor repeatedly restores pressure that is being
lost elsewhere. A systematic leak inspection of the compressor outlet,
receiver, distribution lines, connections, and pneumatic equipment would
therefore be an appropriate diagnostic response.
13. In a refrigeration system serving a
railway facility, the compressor is operating but the refrigerated space is not
reaching the required temperature. The condenser is unusually hot and the
system shows signs of restricted heat rejection. Which component should receive
particular attention?
A. Bogie spring and its seating arrangement B.
Wagon coupler and its locking mechanism C. Condenser and its airflow or
heat-transfer condition D. Brake-block holder and its adjustment
Answer: C.
Condenser and its airflow or heat-transfer condition
Rationale: The condenser must reject heat from the
refrigerant to the surrounding environment. If airflow is restricted, the
condenser surface is heavily fouled, or heat transfer is otherwise impaired,
condensing temperature and pressure can rise while refrigeration performance
deteriorates. Therefore, when the compressor operates but cooling is inadequate
and the condenser is unusually hot, the condenser's cleanliness, airflow, fan
operation, and heat-transfer condition should be investigated.
14. A freight wagon door closes correctly
when the wagon is empty but becomes difficult to close after the wagon is
loaded with cargo. Which explanation should be investigated FIRST?
A. Increased
refrigerant circulation through the system B. Structural movement or
distortion under load C. Increased brake-pipe pressure during loading D.
Reduced lubrication of the coupler knuckle
Answer: B.
Structural movement or distortion under load
Rationale: If door alignment changes after cargo is
loaded, the additional load may be causing structural deflection, distortion,
uneven loading, or movement affecting the door frame and locking mechanism. The
examiner should inspect the wagon body, door alignment, hinges, guides, locking
components, and supporting structure. The fact that the problem appears
specifically under load provides an important clue toward load-related
structural movement rather than an unrelated pneumatic or coupler condition.
15. A wheel bearing has the correct quantity
of lubricant, yet its operating temperature remains higher than that of
comparable bearings under similar conditions. Which additional factor should be
MOST carefully considered?
A. Bearing
internal condition or incorrect running clearance B. Wagon exterior paint
colour and finish C. Carriage window locking arrangement D. Coupler height
measured without loading
Answer: A.
Bearing internal condition or incorrect running clearance
Rationale: Correct lubricant quantity does not
guarantee correct bearing operation. Excessive temperature can result from
internal damage, incorrect clearance, excessive preload, contamination,
misalignment, or other mechanical conditions that increase friction. Comparing
the bearing with similar units under comparable operating conditions is useful
because an unexplained temperature difference can indicate developing internal
deterioration requiring detailed examination.
16. During examination of a coupler, the
locking mechanism appears engaged, but the examiner cannot confirm that the
lock has reached its proper secured position. What is the MOST appropriate
action?
A. Accept the
coupler because the knuckle appears closed B. Release the wagon and monitor it
during the next trip C. Confirm the locking condition using the approved
inspection procedure D. Increase the brake-cylinder pressure to secure the
coupler
Answer: C.
Confirm the locking condition using the approved inspection procedure
Rationale: A coupler must be positively secured, not
merely appear closed. An incompletely locked coupler can separate during
operation, creating a serious railway safety risk. When the examiner cannot
positively establish that the locking mechanism is correctly engaged, the
condition should be checked using the prescribed inspection method and the
wagon should not be treated as satisfactory merely because the knuckle visually
appears closed.
17. During examination of a pneumatic brake
system, the brake pipe is at the expected pressure, but the brake cylinder does
not develop the required pressure when a brake application is made. Which
component group should be MOST directly investigated?
A. Brake control
and cylinder supply path B. Wagon roof drainage and body seals C. Wheel
flange lubrication and axle marking D. Suspension Spring seating and body
paint
Answer: A.
Brake control and cylinder supply path
Rationale: When the brake pipe is at the expected
pressure but the brake cylinder does not develop the required pressure during
an application, the examiner should trace the pneumatic path responsible for
supplying the cylinder. Possible causes include malfunction of the brake
control valve, restricted or leaking connections, blocked passages, or a
defective brake cylinder. Following the pressure path from the control
equipment toward the actuator provides a logical way to isolate the fault
rather than investigating unrelated wagon systems.
18. A workshop grinding machine produces
increasing vibration after prolonged operation, although the machine remains
capable of grinding. Which finding would MOST strongly justify stopping the
machine for examination?
A. The machine
produces a normal grinding sound B. The grinding wheel shows signs of
imbalance or damage C. The operator has completed the scheduled work D. The
machine's external paint remains intact
Answer: B. The
grinding wheel shows signs of imbalance or damage
Rationale: A damaged, incorrectly mounted, or
unbalanced grinding wheel can generate dangerous vibration and may fail
catastrophically at operating speed. Continued operation merely because the
machine still performs its intended task is unsafe when a rotating abrasive
component shows evidence of damage or imbalance. The machine should be stopped
and examined according to workshop safety and maintenance procedures before
further use.
19. During inspection of a wagon underframe,
a technician discovers a crack close to a highly loaded structural connection.
The crack is relatively short and the wagon is otherwise in good condition.
Which assessment is MOST appropriate?
A. The crack may
be ignored because its length is small B. The crack is acceptable whenever the
wagon body remains level C. The crack should be covered with paint before
release D. The crack should be assessed according to its location and
structural significance
Answer: D. The
crack should be assessed according to its location and structural significance
Rationale: The significance of a structural crack
cannot be determined from length alone. Its location, orientation, depth,
proximity to stress concentrations, loading conditions, and progression
potential must be considered. A crack near a highly loaded structural
connection may have greater significance than a longer crack in a less critical
area. The examiner should therefore follow the applicable inspection and repair
requirements rather than relying solely on visual size.
20. A refrigeration compressor repeatedly
trips shortly after starting, while the condenser fan is not operating. Which
relationship BEST explains why the compressor may be affected?
A. Poor condenser
heat rejection can increase condensing pressure B. Low wheel adhesion can
increase compressor displacement C. Excessive brake clearance can reduce
refrigerant flow D. High wagon loading can directly reduce bearing lubrication
Answer: A.
Poor condenser heat rejection can increase condensing pressure
Rationale: The condenser fan assists heat rejection
from the refrigerant. If the fan fails, condenser heat transfer can
deteriorate, causing condensing temperature and pressure to rise. Excessive
pressure can increase compressor operating load and may activate a protective
high-pressure cut-out. Therefore, a non-operating condenser fan is directly
relevant to repeated compressor trips and should be investigated before
repeatedly resetting the compressor.
21. During inspection, two visually similar
brake components are found on opposite sides of a wagon, but one has
significantly greater wear. The wagon has been operating under similar loading
conditions on both sides. Which approach is MOST appropriate?
A. Replace only
the more worn component without further investigation B. Investigate the cause
of unequal wear before completing the repair C. Ignore the difference because
both components remain installed D. Increase lubrication on the less worn
component only
Answer: B.
Investigate the cause of unequal wear before completing the repair
Rationale: Unequal wear between corresponding brake
components may indicate uneven force distribution, restricted movement,
incorrect adjustment, misalignment, contamination, or another underlying
defect. Simply replacing the worn component without addressing the cause can
result in the same failure recurring. Effective maintenance therefore requires
not only correcting the visible defect but also determining why the wear
occurred disproportionately.
22. A technician is examining a wheelset and
finds evidence suggesting that the wheel may have experienced repeated thermal
loading from braking. Which additional observation would MOST strongly
support this assessment?
A. Localized heat
discoloration associated with brake contact B. Clean and correctly marked
wagon identification plates C. Normal operation of the carriage interior doors D.
Correct height of the vehicle's roof-mounted equipment
Answer: A.
Localized heat discoloration associated with brake contact
Rationale: Repeated or excessive brake application
can generate substantial heat at the wheel and brake interface. Localized
discoloration or other thermal evidence concentrated around the wheel tread or
brake-contact area can support the conclusion that the wheel has experienced
abnormal heating. Such evidence warrants further examination because repeated
thermal cycling can affect wheel material properties, geometry, and structural
integrity.
23. A wagon exhibits repeated abnormal wear
on components connected to one bogie, while the corresponding components on the
other bogie remain comparatively normal. Which diagnostic principle is MOST
useful?
A. Assume the
entire wagon has identical operating conditions B. Compare the affected bogie
systematically with the unaffected bogie C. Replace every component on both
bogies immediately D. Concentrate only on the wagon's external body condition
Answer: B.
Compare the affected bogie systematically with the unaffected bogie
Rationale: Comparing an abnormal unit with an
otherwise similar normal unit is a valuable diagnostic method because it helps
identify differences in alignment, loading, clearances, lubrication, component
condition, or adjustment. A systematic comparison can narrow the possible
causes without unnecessarily replacing serviceable components. The examiner
should use the unaffected bogie as a reference while still applying the
relevant maintenance requirements and measurements.
24. During maintenance of a pneumatic system,
a technician hears a continuous hissing sound near a pipe connection while the
system is pressurized. The pressure also falls more rapidly than expected.
Which conclusion is MOST justified?
A. The refrigeration evaporator is increasing
brake-pipe volume B. The wagon suspension is absorbing excessive pneumatic
pressure C. The wheel flange is causing the pressure reduction D. The system
may have a pneumatic leak at or near the connection
Answer: D. The
system may have a pneumatic leak at or near the connection
Rationale: A continuous hissing sound from a
pressurized pipe connection, accompanied by an unexplained pressure decrease,
is strong evidence of an air leak. The examiner should safely isolate the
system as required and inspect the connection, sealing surfaces, fittings,
hoses, and adjacent components using an approved leak-detection procedure.
Pneumatic leaks can reduce system reliability and, in railway braking
applications, may have direct safety implications.
25. During a final examination of a freight
wagon after maintenance, all repaired components appear satisfactory
individually, but the examiner notices that the brake rigging, wheel condition
and suspension geometry have not been checked together. What is the MOST
important reason for conducting an integrated final examination?
A. Individual
components can interact and create defects not apparent in isolation B.
Integrated inspection eliminates the need for component measurements C.
Component inspection is unnecessary once the wagon has been repaired D. Final
examination is mainly intended to confirm the wagon's paint condition
Answer: A.
Individual components can interact and create defects not apparent in isolation
Rationale: Railway rolling stock functions as an
interconnected mechanical system, so satisfactory individual components do not
automatically guarantee satisfactory vehicle performance. Brake rigging can
influence wheel heating and wear; suspension geometry can influence wheel
loading and running behaviour; and wheel condition can interact with both
braking and suspension systems. An integrated final examination therefore
verifies that repaired or maintained components operate correctly together and
that no interaction between systems creates a remaining safety or reliability
problem.
26. During examination of a wagon, a
technician finds that the wheelset is correctly positioned, but the axle-box
bearing shows evidence of lubricant leakage. The bearing temperature is
currently normal. Which assessment is MOST appropriate?
A. Release the
wagon because the temperature is normal B. Add lubricant externally and
continue operation C. Investigate the source and extent of the leakage before
release D. Replace the wheelset immediately without examining the bearing
Answer: C.
Investigate the source and extent of the leakage before release
Rationale: Lubricant leakage may indicate a damaged
seal, excessive internal pressure, incorrect lubricant quantity, defective
components, or another condition that can eventually deprive the bearing of
adequate lubrication. A normal temperature at the time of inspection does not
prove that the bearing will remain safe during subsequent operation. The
examiner should therefore establish the cause and extent of the leakage and
determine whether the bearing and sealing arrangement meet the applicable
maintenance requirements.
27. A freight wagon develops a tendency for
one side of its body to sit lower than the other when loaded. Examination shows
that the loading appears unevenly distributed. Which factor should be
considered MOST directly relevant to the observed condition?
A. Unequal load
distribution across the supporting suspension B. Increased pressure in the
brake main reservoir C. Excessive lubrication of the coupler mechanism D.
Reduced airflow through the workshop compressor
Answer: A.
Unequal load distribution across the supporting suspension
Rationale: The suspension system transfers vehicle
and payload forces to the wheelsets, so unequal loading can produce different
forces on opposite sides of the vehicle and cause an uneven body level. The
examiner should distinguish between a loading-related condition and a genuine
suspension defect by checking the load distribution, spring condition,
suspension geometry, and relevant measurements. Pneumatic pressure and coupler
lubrication do not directly account for the body sitting lower on one side
under an uneven load.
28. While examining a wagon, a technician
notices that a brake block is wearing in a tapered manner rather than uniformly
across its contact surface. Which condition would be MOST relevant to
investigate?
A. Incorrect
carriage interior temperature B. Excessive air pressure in the reservoir C. Incorrect
brake-block alignment with the wheel D. Reduced coupler spring compression
Answer: C.
Incorrect brake-block alignment with the wheel
Rationale: A brake block should make appropriate
contact with the wheel so that braking forces and wear are distributed as
intended. Tapered or uneven wear can indicate misalignment, incorrect rigging
geometry, restricted movement, or another mechanical condition affecting the
contact between the block and wheel. Investigating alignment and the associated
brake rigging is therefore more appropriate than focusing on unrelated
pneumatic or carriage systems.
29. A technician is inspecting a cylindrical
roller bearing and observes small areas of surface deterioration on the
raceway. The bearing has not yet developed noticeable abnormal noise. Which
interpretation is MOST appropriate?
A. The bearing is
acceptable until complete seizure occurs B. Surface deterioration may indicate
developing fatigue damage C. The defect is insignificant because the bearing
still rotates D. The condition proves that the axle is incorrectly dimensioned
Answer: B.
Surface deterioration may indicate developing fatigue damage
Rationale: Bearing surfaces are subjected to
repeated contact stresses, and localized deterioration can be an early
indication of fatigue, pitting, spalling, or related damage. The absence of
noise does not exclude an incipient defect because some deterioration may
progress considerably before producing obvious audible symptoms. The examiner
should therefore assess the affected surface against the relevant inspection
criteria and determine whether the bearing remains suitable for service.
30. A wagon coupling operation repeatedly
requires excessive force before the coupler components engage correctly. The
coupler is otherwise visually intact. Which investigation would provide the MOST
useful initial information?
A. Check the
coupler alignment and associated moving components B. Measure the temperature
of the wagon roof C. Inspect the carriage lighting circuit D. Increase the
brake-cylinder pressure during coupling
Answer: A.
Check the coupler alignment and associated moving components
Rationale: Difficulty during coupling despite
apparently intact components can result from misalignment, restricted movement,
damaged or incorrectly positioned moving parts, or problems with the coupling
mechanism. Examination should therefore begin with the mechanical relationship
and movement of the coupler components. Increasing brake-cylinder pressure or
examining unrelated wagon systems would not directly address the mechanical
cause of difficulty during engagement.
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