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Questions and Answers
Which type of inspection is carried out daily for EMUs?
Which type of inspection is carried out daily for EMUs?
Where should the Intermediate Overhaul (IOH) be carried out?
Where should the Intermediate Overhaul (IOH) be carried out?
What should be done by the motorman after overnight stabling of EMUs?
What should be done by the motorman after overnight stabling of EMUs?
Which inspection is performed quarterly?
Which inspection is performed quarterly?
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What type of brakes require specific testing procedures according to the content?
What type of brakes require specific testing procedures according to the content?
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In which scenario should the detailed checklist for air brakes be preserved?
In which scenario should the detailed checklist for air brakes be preserved?
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Which inspection must be conducted at the homing shed for EMUs?
Which inspection must be conducted at the homing shed for EMUs?
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What is the primary purpose of conducting a trip inspection related to brake blocks?
What is the primary purpose of conducting a trip inspection related to brake blocks?
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How often should brake blocks generally be checked during trip inspections?
How often should brake blocks generally be checked during trip inspections?
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Which component is NOT directly inspected as part of the trip inspection process?
Which component is NOT directly inspected as part of the trip inspection process?
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What should be done before brake blocks reach condemning thickness?
What should be done before brake blocks reach condemning thickness?
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Which of the following checks involves ensuring the effectiveness of the safety strap?
Which of the following checks involves ensuring the effectiveness of the safety strap?
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What is a critical check that needs to be performed on the transformers during the trip inspection?
What is a critical check that needs to be performed on the transformers during the trip inspection?
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Which inspection is associated with ensuring cleanliness and operational integrity of pantographs?
Which inspection is associated with ensuring cleanliness and operational integrity of pantographs?
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What maintenance action is required for silica gel during trip inspections?
What maintenance action is required for silica gel during trip inspections?
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What should you do to the oil level of the auxiliary compressor during inspections?
What should you do to the oil level of the auxiliary compressor during inspections?
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What component should be visually inspected for damages during the trip inspection?
What component should be visually inspected for damages during the trip inspection?
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What should be done to the 'Schaku' couplers during inspection?
What should be done to the 'Schaku' couplers during inspection?
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During the half-yearly inspection, what should be renewed in the compressor?
During the half-yearly inspection, what should be renewed in the compressor?
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What is the purpose of checking the air gap in electromagnetic contactors?
What is the purpose of checking the air gap in electromagnetic contactors?
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Which component should be checked for rust, corrosion, and damage?
Which component should be checked for rust, corrosion, and damage?
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What should be done with the voltage stabilizer transformer during inspection?
What should be done with the voltage stabilizer transformer during inspection?
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What is the main purpose of using clips made out of split pins when lifting the cylinder into position?
What is the main purpose of using clips made out of split pins when lifting the cylinder into position?
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Which sequence of actions should be taken when tightening the nuts on the joint?
Which sequence of actions should be taken when tightening the nuts on the joint?
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What component is involved in cutting off communication between the valve body and the vacuum chamber?
What component is involved in cutting off communication between the valve body and the vacuum chamber?
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What should be used for cleaning rubber fittings on the cylinder?
What should be used for cleaning rubber fittings on the cylinder?
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What happens if a defective diaphragm washer is present when vacuum is destroyed?
What happens if a defective diaphragm washer is present when vacuum is destroyed?
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How should the solvent be used when cleaning metal parts of the cylinder?
How should the solvent be used when cleaning metal parts of the cylinder?
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What is the maximum piston travel allowed for effective brake power?
What is the maximum piston travel allowed for effective brake power?
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What is involved in the daily inspection conducted by the Engine Examiner?
What is involved in the daily inspection conducted by the Engine Examiner?
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What is one major consequence of not removing solvent traces before replacing rubber parts?
What is one major consequence of not removing solvent traces before replacing rubber parts?
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What should be checked first when inspecting traction motors?
What should be checked first when inspecting traction motors?
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Which component requires cleaning with petroleum jelly after inspection?
Which component requires cleaning with petroleum jelly after inspection?
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During the monthly inspection, what should be done if tyre wear is found to be excessive?
During the monthly inspection, what should be done if tyre wear is found to be excessive?
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What should be inspected for grease leakage during the monthly check?
What should be inspected for grease leakage during the monthly check?
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Which item is not included in the daily inspection list?
Which item is not included in the daily inspection list?
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What action should be taken regarding buffer inspections?
What action should be taken regarding buffer inspections?
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How often should the suction strainer and centrifugal dirt collectors be inspected and cleaned?
How often should the suction strainer and centrifugal dirt collectors be inspected and cleaned?
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Which of the following is essential to check before the rainy season?
Which of the following is essential to check before the rainy season?
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What should be done regarding shock absorbers if oil leakage is detected?
What should be done regarding shock absorbers if oil leakage is detected?
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What must be checked on the hand-brake during inspections?
What must be checked on the hand-brake during inspections?
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Which step should be taken if the brake blocks are found to be badly worn during inspection?
Which step should be taken if the brake blocks are found to be badly worn during inspection?
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What specific operational check should be performed after the passenger alarm chain is tested?
What specific operational check should be performed after the passenger alarm chain is tested?
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Which component's operational effectiveness is assessed by testing the brake controller at each driving position?
Which component's operational effectiveness is assessed by testing the brake controller at each driving position?
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During which inspection should the condition of the bolster helical springs be verified?
During which inspection should the condition of the bolster helical springs be verified?
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What should be inspected visually to identify defects during the routine checks?
What should be inspected visually to identify defects during the routine checks?
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Which item must always be cleaned when preparing a unit for operation?
Which item must always be cleaned when preparing a unit for operation?
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What is the main purpose of checking the deadman's device in each driving cab during inspections?
What is the main purpose of checking the deadman's device in each driving cab during inspections?
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What components should be checked for wear and damage during the Intermediate Overhaul (IOH)?
What components should be checked for wear and damage during the Intermediate Overhaul (IOH)?
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Which procedure involves testing the dielectric strength of oil in transformers?
Which procedure involves testing the dielectric strength of oil in transformers?
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What action is required for the pilot valve in the Master Controller during inspections?
What action is required for the pilot valve in the Master Controller during inspections?
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Which component's tension must be measured during the inspection process?
Which component's tension must be measured during the inspection process?
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What must be done to the reversing gear-box for speedometer during the IOH?
What must be done to the reversing gear-box for speedometer during the IOH?
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Which specific maintenance task is needed for EP brake valves during the IoH?
Which specific maintenance task is needed for EP brake valves during the IoH?
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What is the correct maintenance procedure for the bearings in the MG set?
What is the correct maintenance procedure for the bearings in the MG set?
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What condition must be evaluated regarding pantograph EP valves during inspections?
What condition must be evaluated regarding pantograph EP valves during inspections?
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Which part should be cleaned and lubricated in the Master Controller check?
Which part should be cleaned and lubricated in the Master Controller check?
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What does the extinguishing of the green lamp indicate in the braking system?
What does the extinguishing of the green lamp indicate in the braking system?
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What happens when the pressure in the brake pipe is reduced due to various actions?
What happens when the pressure in the brake pipe is reduced due to various actions?
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What is the maximum pressure allowed in the brake cylinders when utilizing the auxiliary reservoir?
What is the maximum pressure allowed in the brake cylinders when utilizing the auxiliary reservoir?
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What role does the triple valve play while in the 'lap' position?
What role does the triple valve play while in the 'lap' position?
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Which of the following accurately describes the behavior of the orange lamp during brake application?
Which of the following accurately describes the behavior of the orange lamp during brake application?
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What is the pressure maintained in the main reservoir by the pressure governors?
What is the pressure maintained in the main reservoir by the pressure governors?
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Which component is responsible for maintaining the pressure to keep the automatic brakes released?
Which component is responsible for maintaining the pressure to keep the automatic brakes released?
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What is the role of the brake application relay in each driving cab?
What is the role of the brake application relay in each driving cab?
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How many brake cylinders are typically found on a motor coach bogie?
How many brake cylinders are typically found on a motor coach bogie?
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What position on the brake controller handle is associated with the emergency braking function?
What position on the brake controller handle is associated with the emergency braking function?
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Which of the following is included among the five train wires in the braking system?
Which of the following is included among the five train wires in the braking system?
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What mechanism is used for manual release of brakes in individual bogies?
What mechanism is used for manual release of brakes in individual bogies?
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What is the pressure maintained in each coach's brake unit?
What is the pressure maintained in each coach's brake unit?
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What feature of the brake controller ensures that it functions in only the active cab?
What feature of the brake controller ensures that it functions in only the active cab?
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Which system warns the driver of failures related to the EP brakes?
Which system warns the driver of failures related to the EP brakes?
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What is the primary function of the self-lapping mechanism in the brake system?
What is the primary function of the self-lapping mechanism in the brake system?
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Which factor directly influences the brake cylinder pressure as the controller handle is moved?
Which factor directly influences the brake cylinder pressure as the controller handle is moved?
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What occurs if the brake cylinder pressure exceeds the limit corresponding to the handle position?
What occurs if the brake cylinder pressure exceeds the limit corresponding to the handle position?
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What happens to the application wire if there is a drop in brake cylinder pressure due to leakage?
What happens to the application wire if there is a drop in brake cylinder pressure due to leakage?
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What is the maximum brake cylinder pressure that can be achieved as mentioned?
What is the maximum brake cylinder pressure that can be achieved as mentioned?
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In positions II and V, what allows the application and holding circuits to bypass the self-lapping mechanism?
In positions II and V, what allows the application and holding circuits to bypass the self-lapping mechanism?
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Which component limits the maximum pressure in the brake cylinder beyond the set value?
Which component limits the maximum pressure in the brake cylinder beyond the set value?
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What is the primary role of the 'exhaust' in the brake system?
What is the primary role of the 'exhaust' in the brake system?
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How does the handle position affect the controlling of brake pressure?
How does the handle position affect the controlling of brake pressure?
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What initiates the process of applying the EP brakes?
What initiates the process of applying the EP brakes?
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Study Notes
Maintenance and Overhaul Schedules of EMUs
- General maintenance schedules for EMUs (electric multiple units) are applicable, with modifications as noted.
- After overnight stabling, motormen must drain air reservoirs to remove accumulated water.
- Daily, trip, monthly, quarterly, half-yearly inspections, and intermediate overhauls are generally performed as part of routine maintenance.
- Professional overhauls, done at workshops, are designated "POH" (Periodic Overhaul).
- Specific tasks differ based on railway location and EMU type.
- Annexure 4.01 provides detailed work schedules.
Scheduled Inspection
- Daily inspection: Primarily for running section, but can be done in a shed or outstation as needed.
- Trip inspection (IT): Performed at the homing shed.
- Monthly inspection (IA): Performed at the homing shed.
- Quarterly inspection (IB): Performed at the homing shed.
- Half-yearly inspection (IC): Performed at the homing shed.
- Intermediate overhaul(IOH): Performed at the designated workshop
- POH(Periodic Overhaul): Performed at the designated workshop for each railway.
EMU Fitness Certificate
- EMU fitness certificates are issued based on specific types and local conditions.
- Details from Annexure 4.01 should be used as guidance, not an exhaustive set of instructions.
Testing of Air Brakes
- Electro-pneumatic brakes are described in Annexure 4.02.
- A supervisor is responsible for testing air brakes of complete train formations after inspections or repairs.
- This should be performed at both ends of the train formation.
Maintenance of Vacuum Brakes
- Details for vacuum brake maintenance are provided in TXR manuals (with a summary given here)
- Vacuum brake cylinders should be examined, cleaned, and necessary repairs/renewals performed annually.
- Correct fitting of components is essential to avoid leaks and ensure proper functioning of vacuum brakes.
- Specific checks and cleaning procedures are needed before service.
- Piston travel should not exceed 4" (100mm).
Daily Inspection
- The Engine Examiner must check for unusual occurrences reported by motormen.
- Auxiliaries should be visually checked for proper starting and operation.
- Axles should be checked by hand to ensure normal temperatures.
- Components like traction bars, pendular suspension, springs, and brake rigging are checked for abnormalities.
- Controls and indications must also be checked.
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Description
This quiz covers the general maintenance schedules and inspection procedures for Electric Multiple Units (EMUs). It includes daily, trip, monthly, quarterly, and half-yearly inspections as well as details on periodic overhauls and specific tasks based on location and EMU type. Test your knowledge on the procedures and regulations associated with EMU maintenance.
