95 Questions
What is the maximum speed in kmph when the TM speed sensor fails?
1 kmph
In which panel is the fire detector actuation switch located?
SB-2
After how many seconds should the VCD be reset in a CCB2-equipped locomotive?
32
What is the MCB trip code for a 3-phase locomotive's memote fault?
127.92
Which valve opens when the reactor breaker trips?
Blending valve
In a 3-phase locomotive, which relay supplies power to the OHE monitoring relay?
MVR86
What is the CB number for the VCD breaker in an SB2 panel?
48.1
At what battery voltage does the locomotive shut down?
82
Which breaker supplies power to the CCU2?
127.1/2
What is the breaker number for the LSCE lamp and VCD fault?
127.82
What is the BC pressure in kg/cm2 in WAP5 loco's conjection breaking system?
5
What is the procedure when DJ close is not available in SB1 panel?
136.4
What is the pressure in kg/cm2 in WAP7 loco's conjection breaking system?
2.5
What is the valve that gets energized when E70 brake system's LSVW fails?
PVCD
What is the procedure when 'In operation' lamp is not lit in FDU?
127.91/2
What is the maximum TE of WAG-9 Loco in KN?
458
Which EP valve gets energized when DBC is in release position?
15&19
What is the maximum TE of WAP-5 Loco in KN?
258
In which mode does the MCE remain off in Kuhalam mode?
218
What is the rail gap (in mm) in WAG9 loco?
102-119
Which circuit breaker will prevent Air Dryer from working in SB-2 Panel?
128.1
What is the MCB of 12.3/1&12.4/1 contactor?
127.1/1
What is the maximum voltage of WAG-9 Loco battery charger input?
415V3फेज
What is the minimum voltage of WAG-9 Loco P1 mains that will generate a warning?
86
How many processors are there in GTO based loco's SR1 panel?
3
Which circuit breaker will prevent SPM from working in SB-2 Panel?
127.92
What is the maximum speed in kmph that will not be exceeded if Doppler Radar system fails?
10
Which sub-system will isolate Cab No. 1 when it is in SS13?
SS13
What is the maximum percentage of power reduction in WAG-9 IGBT Loco if 1TM is isolated?
17
Which valve will drop BP in CCB2 Loco if the speed exceeds 110%?
821वेंट वाल्व
What is the correct value of OCR78 during normal operation?
360
Which processor may fail if the BUR alarm is not working and the VCD buzzer input is not receiving a signal?
FLG2
What is the number of the relay associated with the battery circuit fault in a 3-phase locomotive?
89.7
If the pressure lock remains due to the dashpot valve, which valve is likely to be faulty?
31
What is the correct value of the current in amps?
5
If the TE/BE meter is not showing any reading and the EBC5 valve is not operating, which processor may fail?
FLG2
What is the correct sequence of actions to release the DBV?
Switch off CAB 1, switch off BL key in CAB 2, and then release DBV
What is the purpose of the OCR78 during normal operation?
To provide a signal to the VCD
What is the minimum voltage in KV required for VCB to trip?
17.5
At what temperature in *C does VCB open?
84
What is the pressure range in Kg/cm2 for MCP1,2?
8-10
What is the BP drop when VCD operates in WAG9 loco?
74
How many seconds does it take to reset VCD in E70 brake system?
120
How many seconds does it take to tap EP valve on BP failure in E70?
16
What is the time in seconds when EP valve does not connect during brake application?
21
In the E70 brake system, what happens when the EP valve is connected?
SLAVE LOCO is released
Which valve is operated when the MCP is unloaded in the E70 brake system?
ULMV
What is the purpose of the VCV valve in the E70 brake system?
To operate the AFI&44(RGAF)
What happens when the HBB2 processor fails?
The IP(72) valve is de-energized
Which circuit breaker prevents the Air Dryer from working in the SB-2 panel?
CB2
What is the purpose of the MCB in the locomotive?
To isolate the power supply
Which valve is energized when the DBC is in the release position?
VCV
What is the purpose of the CCB2 brake system?
To control the braking system
What is the current in amps when OCR78 is in operation?
360
Which processor may fail if the TE/BE meter is not showing any reading and the EBC5 valve is not operating?
FLG2
What is the relay number associated with the battery circuit fault in a 3-phase locomotive?
89.7
If the pressure lock remains due to the dashpot valve, which valve is likely to be faulty?
31
Which processor may fail if the BUR alarm is not working and the VCD buzzer input is not receiving a signal?
FLG2
What is the purpose of the OCR78 during normal operation?
To monitor the OHE
What is the minimum voltage in KV required for VCB to trip?
4.5
What is the pressure range in Kg/cm2 for MCP1,2?
10-15
What is the BP pressure drop when the VCD operates in a WAG9 loco?
0.60 kg/cm2
Which switch is operated to reset the VCD?
BPVR
What is the pressure in kg/cm2 when the CSC declutches due to low pressure?
0.25 kg/cm2
Which valve opens when the reactor breaker trips?
E3W(71)
What happens when the BP pressure drops?
CSC declutches
Which relay supplies power to the OHE monitoring relay?
R3
What is the MCB trip code for a 3-phase locomotive's memote fault?
1.1
Which circuit breaker prevents the Air Dryer from working in an SB-2 panel?
CB2
In a WAG9 loco, which circuit breaker prevents the Air Dryer from working in the SB-2 panel?
127.25/1
In an OHE system, which valve gets energized when the LSCE lamp and VCD fault occur?
211
In a WAG9 loco, which panel contains the CB for the OHE monitoring relay?
STB2
What is the voltage in Volts at which the locomotive shuts down?
130.1
In a WAG9 loco, which switch is used to isolate the pentograph?
152
What is the CB number for the VCD breaker in an SB2 panel?
127.25/1
Which of the following circuit breakers prevents the power supply to the VCD in the SB-2 panel?
127.15
What is the minimum voltage of WAG-9 Loco P1 mains that will generate a warning?
16 KV
Which pentograph fault will cause the MCB 127.7 to trip?
Pentograph not lifted
What is the maximum TE of WAG-9 Loco in KN?
520 KN
Which of the following will prevent the LSCE lamp from glowing?
MCB 127.15 tripping
What is the purpose of OCR78 during normal operation?
To monitor OHE voltage
Which of the following circuit breakers prevents the power supply to the Air Dryer in the SB-2 panel?
MCB 110
What is the correct sequence of actions to release the DBV?
Close DAB, then close DBV
Which WAG-9 Locos sub-system will isolate Cab No. 1 when it is in SS13?
OHE monitoring system
What is the minimum voltage of OHE that will trip the VCB?
24 KV
In a WAG9 locomotive, which circuit breaker prevents the SPM from working in the SB-2 panel?
127.24
What is the maximum voltage of WAG-9 Loco battery charger input?
415V 3-phase
Which valve is operated when the MCP is unloaded in the E70 brake system?
ULMV
In a WAG9 locomotive, what is the minimum voltage in KV required for VCB to trip?
30 KV
What is the purpose of the OCR78 during normal operation?
To monitor the battery voltage
In a WAG9 locomotive, which circuit breaker will prevent the Air Dryer from working in the SB-2 panel?
127.1/2
What is the maximum percentage of power reduction in WAG-9 IGBT Loco if 1TM is isolated?
17%
Which sub-system will isolate Cab No. 1 when it is in SS13?
Power isolation system
What is the correct sequence of actions to release the DBV?
Press the release button, then the dashpot valve, then the VCD
At what temperature in *C does VCB open?
66*C
Study Notes
Multiple Choice Questions Study Notes
- WAG-9 locomotive has a maximum TE traction capacity of 458 kN.
- WAP-5 locomotive has a maximum TE traction capacity of 258 kN.
- In SB-2 panel, if the circuit breaker with the number 128.1 trips, the Air Dryer will not operate.
- If the circuit breaker with the number 127.92 in the SB-2 panel trips, the SPM (Service Panel Meter) will not function.
- When SS13 subsystem is isolated, Cab 1 will be separated from work.
- If the FLG2 subsystem is isolated, the Flange Guard Valve will not operate.
- If the battery voltage drops below 86V, P1 message will be saved in the system.
- In WAG9 locomotive, the circuit breaker numbered 112.1 is responsible for Battery Control.
- If MCPA is not functioning, the Pressure Switch with the number 172.4 in the new panel should be tapped.
- PSS should be kept in position II in order to isolate Pantograph 1.
- When OHE voltage exceeds 30 KV, the Vacuum Circuit Breaker will trip.
- In SR1/2, the oil temperature of 66°C will deactivate the Active Effort Controller.
- If CB from 110.1 trips in the CB panel, the supply will be cut off from CHBA output.
Fault Diagnostics in TE/BE Meter
- If the TE/BE meter is not showing reading and the EBC5 valve is also not functioning, then the FLG2 processor may fail.
- If the OCR78 inverter is tripped and the VCB is not tripping, then the current reading is 360 amps.
3-Phase Loco Battery Fault
- The relay number for a 3-phase loco battery fault is 89.7.
Cab 1 and Cab 2 Interactions
- If Cab 1 is functioning and Cab 2's BL key is turned off, and the DBV is released, but the pressure lock remains due to the dash valve, then the fault is in the 31 valve.
BUR Fault Relay
- If the BUR fault relay is not modulating and the VCD buzzer input signal is not receiving, then the ZBAN processor may fail.
E70 Brake System
- If the E70 brake system's EP valve is faulty, the slave loco may not release the 70 cock, and the BP charge may not happen. In this case, the fault is in the 36 valve.
- The AFI&44(RGAF) valve is operated by the VCV valve in the E70 brake system.
- The IP(72) valve is de-energized in 3 seconds in the E70 brake system.
Processor Faults
- If the Pento1 relay is not functioning and the 237.1 reading is at 0, then the HBB2 processor may fail.
- If Cab 1 is isolated and the air dryer is not functioning, then the STB1 processor may fail.
CCB2 Brake System
- The ULMV valve operates the MCP and VREAD valve in the CCB2 brake system.
EP Valve Operations
- When the BL key is turned off in Cab 1 and the D2(58) valve is operated, the PER COS EP valve is activated.
- When the VCD is operating, the E3W(71) valve reduces the BP pressure.
Switch Operations
- The ZTEL switch is used to operate the ti Swansea FTI.
- The BPVR switch is used to reset the VCD.
Pressure Readings
- The CSC de-energizes when the brake pressure is 0.60 kg/cm2.
- The CSC de-energizes when the BP pressure drops to 0.25 kg/cm2.
Here are the study notes in detailed bullet points:
Electric Loco Operation
- HBB1: STB2 panel is connected to HBB1.
- 139-SB2 Panel: If the speed sensor is not correct, the LSCE lamp will light up.
WAG9 Loco
- Maximum TE: The maximum tractive effort (TE) of WAG9 loco is 458 KN.
- Maximum Speed: The maximum speed of WAG9 loco is 100 km/h.
- Battery Voltage: The battery voltage of WAG9 loco is 415V (3-phase).
WAP7 Loco
- Maximum TE: The maximum tractive effort (TE) of WAP7 loco is 258 KN.
- Maximum Speed: The maximum speed of WAP7 loco is 140 km/h.
SB2 Panel
- CB 127.1/2: If the SB2 panel's CB 127.1/2 is tripped, the air dryer will not work.
- CB 127.24: If the SB2 panel's CB 127.24 is tripped, the SPM will not work.
- CB 128.1: If the SB2 panel's CB 128.1 is tripped, the air compressor will not work.
CCB2 Loco
- VCB: The VCB (Vacuum Circuit Breaker) will trip if the OHE (Overhead Equipment) voltage is more than 30 kV.
- BP: The BP (Brake Pipe) will not form if the CB 127.7 is tripped.
Pento Operation
- Pento 1: The Pento 1 will not work if the CB 127.15 is tripped.
- Pento 2: The Pento 2 will not work if the CB 127.7 is tripped.
OHE (Overhead Equipment)
- Voltage: The OHE voltage should be between 25 kV to 30 kV.
- Distance Protection: The distance protection will work if the OHE voltage is more than 17.5 kV.
Misc
- IG 38 Switch: The IG 38 switch is used to isolate the Pento graph.
- ZTEL Switch: The ZTEL switch is used to control the T/E (Transformer and Equipment) of the loco.
- DAB (Dynamic Brake Rheostat): The DAB is used to control the dynamic brake of the loco.
Technical quiz questions about Indian Railways locomotives, including maximum TE and breaker details.
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