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MEMU CAR SHED/ RAJAHMUNDRY/ BZA DIVISION/SCR

MEMU/EMU TECH III LDCE PRACTICE PAPERS

1. EACH QUESTION ATTEMPT ONCE ONLY
2.TOTAL EXAMINATION TIME 90MIN.ONLY
3. RESULTS SHOW AT END OF THE EXAM

Total time required to get complete notches from shunt to full power
1. 09-12 sec
2. 06-11sec
3. 05-10 sec
4. 010-15sec
Notches will not come if _____is not turned ON
1. CR
2. OL
3. BIV
4. HL Switch
If traction motor No. 4 is grounded, which of the following Relay will act ?
1. OL 3&4
2. EFRA-II
3. OL 1&2
4. EFRP
If any one of the main rectifier fuse is blown?
1. SR will not pick up
2. Only indication will come
3. ABB will trip
4. TELE
Auxiliary Compressor is a
1. DC Motor
2. Single phase AC motor
3. 3phase AC motor
4. None of these
Conservator is a part of
1. Traction Motor
2. VCB
3. Transformer
4. Main Compressor
MCBs will not trip if
1. HOBA in OFF
2. Flasher switch on
3. AWS ON
4. HL Switch on
When earth fault in OVR (Relay) VCB will trip through
1. HEFRP
2. OVR
3. OLP
4. EFRP
LTR relay is provided in
1. Power Circuit
2. Control Circuit
3. Auxiliary II Circuit
4. Auxiliary-1 Circuit
Voltage rating of Auxiliary circuit-I is
1. 266V
2. 110V
3. 372V
4. 141V
In case of earth faults in lights , which relay will act
1. EFRP
2. EFRA I
3. OLP
4. EFRA II
Setting of OL5 & OL6 in EMU is
1. 4000A
2. 3000A
3. 5000A
4. 7000A
SR not picking up with MSTWL, problem is
1. Tap changing contactor
  not closing
2. Motor Contactor not
  closing
3. SR relay I/L bad contact
4. Control switch defective
KF-1 is a
1. Radiator cooling fan motor
2. Contactor
3. Changing over switch
4. Rectifier cooling fan motor
Function of main rectifier is
1. To convert DC to AC
2. To convert AC to DC
3. To convert DC to variable
  DC
4. To convert 3 Phase AC to
  DC
Total No. of auxiliary motors in a motor coach is
1. 6
2. 5
3. 3
4. 4
Voltage rating of 4601 type traction motor in EMU/MEMU is
1. 456 V
2. 535V
3. 675 V
4. 782V
Color of good silica gel is
1. White
2. Blue
3. Red
4. Yellow
Purpose of Auxiliary Rectifier is
1. A To feed TM
2. To feed Aux. compressor
3. To feed Main compressor
4. To fed control circuit
VCB will trip for the following relay
1. TTR
2. RFAR
3. CBAR
4. BIR
Which of the following is a air flow relay
1. ARR
2. RFR
3. RFAR
4. TTR
When TTR acts __________lamp will glow
1. ABB
2. UFL
3. CHBA OFF
4. MSTWL
CC1 is used for operating
1. AUX.compressor
2. Main compressor
3. Rectifier fan
4. Traction Motors
Location of EAS is
1. Roof
2. HT room
3. Cab
4. LI room
CHBA output voltage is
1. 110V AC
2. 141V
3. 266V
4. 110V DC
Fans work with voltage
1. 110V AC
2. 110V DC
3. 141 V AC
4. 266V AC
voltage of Aux-II circuit is
1. 141v
2. 266v
3. 110v
4. 230v
Location of OL-1 and 2 Relay is at
1. Tap changer
2. Relay panel
3. Switch group I
4. Switch group II
Relay to detect abnornalities in transformer
1. EFRA II
2. RFAR
3. BIR
4. OL 1 and 2
main circuit breaker used in EMU or MEMU is
1. ABCB
2. SF-6
3. VCB
4. OCB
location of SL is in
1. HT room
2. LT room
3. Choke tank
4. Cab
pick up voltage of OVR is
1. 140V
2. 540V
3. 230V
4. 840V
setting temperature of TTR is at
1. 150'C
2. 75'C
3. 200'C
4. 35'C
to operate "OL RESET"______ switch should be off
1. ABB
2. CONTROL
3. EP
4. HEFRP
safety relays are
1. TTR,CBAR
2. TTR,RFAR
3. CBAR,NVR
4. BIR,OLP
Rating of twin beam head light is
1. 24V,70/75W
2. 110 V,70/75W
3. 24V,100/90W
4. 110V,90/100W
input/output voltage of DC-DC converter is
1. 110V/110V
2. 110V/100V
3. 110V/24V
4. 110V/32V
SR relay is
1. EM type
2. EP type
3. latching type
4. elctronic type
total number of natches in EMU/MEMU is
1. 11
2. 22
3. 20
4. none of these
number of jumpers in MEMU
1. 5
2. 4
3. 10
4. 5 and 4
electrolyte used in lead acid battery's is
1. Conc.sulphuric acid
2. diluted sulphuric acid
3. nitric acid
4. hydrochloric acid
the rating of HRC fuse for control circuit is
1. 50 A
2. 32A
3. 63 A
4. 10 A
the ampere hour capacity of MEMU LMLA battery is
1. 90 AH
2. 75 AH
3. 95 AH
4. 70 AH
ARR is
1. air reset relay
2. VCB reset relay
3. ABB reaet relay
4. air release relay
CBAR is
1. current balancing Auxiliry relay
2. current balancing air relay
3. current breaking Auxiliry relay
4. current breaking air relay
which of the following is not a safety relay
1. AFL RELAY
2. HEAD LIGHT
3. FLASHER LIGHT
4. SPOT LIGHT
Rating of OLP relay is
1. 100A
2. 100V
3. 160 A
4. 160 V
when earth faults occurs in auxiliry compressor_____ will trip
1. VCB
2. EFRA II
3. MCB
4. EFRP
Battery used in EMU/MEMU is
1. Ni-Cd cell
2. Lead acid cell
3. dry cell
4. Edison cell
purpose of QFL relay is to
1. make flasher light to ON
2. to avoid flasher light to work during initial charging
3. to suppress flasher light
4. to by - pass flasher light
DMH is a part of
1. Brake controller
2. Master controller
3. BL box
4. Guard brake
Breather is a part of
1. Transformer
2. Traction Motor
3. VCB
4. Main Compressor
Silica gel is used
1. To lubricate servo motor
  piston
2. To cool Transformer oil
3. To absorb moisture
4. To Lubricate Bearing
  of TM
CBAR will trip only when
1. One bridge fuse blown
2. Two bridge fuse blown
3. For both a &b
4. D Rectifier Fan not working
To operate EAS, which of the following key is required
1. No key is required
2. Reverser Key
3. BL Key
4. BIV Key
Tap changer contactor auxiliary interlock Gap is
1. 2mm-4mm
2. 1.4mm-2.2mm
3. 2.4mm- 3.2mm
4. 1.4mm-2.2mm
Condition for packing Starting Relay (SR) by crew is
1. Can be packed only
  up to shunt power
2. can be packed only on
  Emergency
3. should not be packed
4. can be packed up to half
  power
pick up voltage of LTR is
1. 70 V
2. 100 V
3. 110 V
4. 120 V
Buckhholz relay is to protect
1. Transformer
2. Traction motor
3. Main Rectifier
4. MCP
PRV is to protect
1. Rectifier
2. Transformer
3. TM
4. Main Compressor
Test done on the transformer oil to know incipient faults in transformer
1. DPT
2. PPT
3. BDV
4. DGA
Size of cable used in control circuit is
1. 3 sq.mm
2. 10sq.mm
3. 25 sq.mm
4. 50 sq.mm
In MEMU the setting of ABB Governor Cut in/cut out is
1. 4.3/3.3 kg/cm.sq
2. 6.0/7.0 kg/cm.sq
3. 8.0/9.0 kg/cm.sq
4. 4.0/5.0 kg/cm.sq
Current collected from OHE through
1. VCB
2. Transformer
3. Pantograph
4. D Rectifier
Transformer Oil is cooled by
1. Rectifier Motor
2. Radiator Motor
3. MCP
4. Oil Pump Motor
Rating of HRC fuses in fan circuit
1. 63 Amps
2. 100 Amps
3. 32 Amps
4. 16 Amps
Total battery voltage in MEMU
1. 80 V
2. 90 V
3. 100 V
4. 110 V
No. of bridges in EMU Rectifier
1. 3
2. 2
3. 6
4. 4
DC series motor is used for traction purpose because
1. Low starting torque
2. High starting torque
3. High speed
4. Constant torque at all speeds
Rating of MEMU transformer is
1. 1000 KVA
2. 800 KVA
3. 1100 KVA
4. A 1200 KVA
CP LP safety valve setting is
1. 3.5 kg/ cm. square
2. 6 kg/ cm. square
3. 5 kg/ cm. square
4. 8 kg/ cm. square
Air dryer safety valve setting is
1. 8.5 kg/cm.square
2. 8.0 kg/cm.square
3. 7.5 kg/cm.square
4. 9.5 kg/cm.square
What is the Torque spanner setting of 4601 Traction Motor compole bolt?
1. A 40-42KG.m
2. 25-27KG.m
3. 32-36KG.m
4. 24-27KG.m
What is the Torque spanner setting of 4303BY Traction Motor compole bolt?
1. 22-26KG.m
2. 30-32KG.m
3. 25-27KG.m
4. 28-32KG.m
What is the insulation class of 4303BY Armature and field winding?
1. Class 200
2. Class180
3. Class150
4. Class 220
What is the Gear ratio of pinion and bull gear of Traction Motor of MEMU?
1. 91:02
2. 20:19
3. 20:91
4. 91:20
What is the Gear ratio of pinion and bull gear of Traction Motor of MEMU?
1. 1:4.55
2. 1:3.55
3. 1:5.55
4. 1:5.55
The clearance between new carbon brush and the brush holder is not grater than ?
1. 3.5mm
2. 1.5mm
3. 2.5mm
4. 0.5mm
Backlash between the pinion and gear wheel of 4303BY traction motor is
1. 0.20 – 1.2mm
2. 0.15 – 1.2mm
3. 0.17 – 1.2mm
4. 0.25 – 1.2mm
How man y inter poles in Main compressor?
1. 04
2. 02
3. 06
4. 05
What is the Main compressor rating ?
1. 20KW
2. 15KW
3. 10KW
4. 12.5KW
What is the Auxiliary compressor closing contactor?
1. CC1
2. CC2
3. CC4
4. CC3
A SrDEE can sign NS indent up to a value of
1. 10 Lakh
2. 5 lakh
3. 2.5 Lakh
4. 15 Lakh
How many digits will be there in a PL Number
1. 6
2. 7
3. 8
4. 9
NS indent of value Rs 15000 is to be submitted on
1. S1302
2. S1302A
3. S1313
4. S1313A
what is the max allowable limit of Tread wear in mm
1. 5
2. 6
3. 7
4. 3
what is the max allowable limit of flange wear in mm
1. 3.5
2. 2
3. 3
4. 6.5
what is the crown clearance limit of a axle box of MC in mm
1. 38±6
2. 30±6
3. 32±6
4. 42±6
what is the crown clearance limit of a axle box of air suspension coach in mm
1. 30±6
2. 38±6
3. 40±5
4. 42±69
what is the tonnage capacity of MEMU MC axle
1. 20
2. 13
3. 23
4. 16
which is used for lubrication of dash pot
1. SP77
2. SP68
3. SP50
4. SP57
MCP governor setting is
1. 6.0- 7.0 kg/cm.square
2. 8.0- 7.0 kg/cm.square
3. 6.0-8.0 kg/cm.square
4. 6.0- 7.5 kg/cm.square
which is the below equipment is in brake controller ?
1. Application magnite valve
2. holding magnite valve
3. stabilising valve
4. puppet valve
EP Unit safety valve settingb in MEMU is
1. 4.2 kg/cm.square
2. 3.2 kg/cm.square
3. 5.2 kg/cm.square
4. 2.2 kg/cm.square
which presser is used in Auto Brake ?
1. BP
2. MR
3. FP
4. BC
Parking Brake limiting valve setting in MEMU is
1. 4.0 kg/cm.square
2. 5.0 kg/cm.square
3. 7.0 kg/cm.square
4. 6.0 kg/cm.square
what use of stabilising valve in Ep Unit in MEMU is
1. smooth braking
2. hard braking
3. intial braking
4. fast braking
how many spit pins in pantograph assembly in MEMU ?
1. 20
2. 35
3. 25
4. 19
SS 1 safety valve setting in MEMU is
1. 6. 5 kg/cm.square
2. 7.75 kg/cm.square
3. 8.0 kg/cm.square
4. 8.75 kg/cm.square
Air spring bellow pressure controled by
1. leveling valve
2. check valve
3. stabilising valve
4. dual check valve
With OL Reset switch , how many relays can be reset
1. 6
2. 5
3. 7
4. 8
The voltage of primary winding of MEMU transformer is
1. 25KV
2. 266V
3. 141V
4. 752V
The capacity of oil pump in MEMU is
1. 360 lpm
2. 263.6 lpm
3. 363.6 lpm
4. 400 lpm
HRC fuses for protecting the battery is rated at
1. 100A
2. 80A
3. 63A
4. 75A
MCB rating for oil pump is
1. 10
2. 20
3. 15
4. 16
MCB rating for rectifier fan
1. 10
2. 20
3. 15
4. 12
CLR drop out current value is
1. 425V
2. 450A
3. 425 A
4. 450V
The resistance used for providing weak field modification is
1. 0.091 Ohms
2. 0.027 Ohms
3. 0.564 Ohms
4. 0.891 Ohms
When MPT is moved into Shunt Position which wire No gets supply
1. 3
2. 4
3. 1
4. 2
In DMH brake, entire BP is exhausted through which valve?
1. Pilot valve
2. Equalising discharge
  Valve
3. Triple valve
4. DMH check Valve
Dropping reactor will be in power circuit upto which notch?
1. 10
2. 12
3. 15
4. 11
Traction Ammeter is connected to which TMs?
1. 1 AND 2
2. 2 AND 3
3. 1 AND 3
4. 4 AND 1
Total Voltage from Untapped winding is
1. 266V
2. 391V
3. 141V
4. 782V
RTL and PFD is cooled using
1. Radiator fan
2. Transformer oil
3. Rectifier fan
4. Natural air
Which of these relays cause motor contactors to open?
1. EFRA - II
2. OLP
3. PRV
4. RFAR
TSS is kept in TEST position during which instance?
1. HT Test
2. LT Test
3. Running
4. None of these
The train is said to be running in half power between ___ & ___ notches
1. 3 and 12
2. 1 and 11
3. 10 and 22
4. 11 and 22
TL is said to be in service during _____ notches
1. Even
2. Odd
3. All
4. None of these
The order of closing of tapping contactors in 1st Notch is
1. T1, T8
2. T1, T7, T9
3. T9, T1, T7
4. , T7, T9
Malfunctioning of Oil pump would result in acting of which relay?
1. NVR
2. NVR
3. RFAR
4. TTR
Choke tank houses
1. SL, TL, DL
2. RTL,PFD, TL
3. RTL, DL, PFD
4. SL, PFD, DL
Rectifier fan should work when ____ relay is energised
1. TTR
2. ABR
3. RFAR
4. BIR
Current rating of Rectifier fan motor is
1. 10 A
2. 4.5 A
3. 7 A
4. 15 A
Fully Charged Battery will have specific gravity of
1. 1260
2. 1100
3. 1280
4. 1220
Each cell in battery will produce __ volts
1. 2.2V
2. 3.5V
3. 1.5V
4. 4.5
The switch for getting battery feed from other MC is
1. COC
2. CCOS
3. COS
4. SOCS
Controlling relay of Main Compressor is
1. RFAR
2. TTR
3. SR
4. CR
OHE line voltmeter is connected to ______ circuit
1. Auxiliary I
2. Auxiliary II
3. Primary
4. None of these
Fans power circuit is protected by HRC fuse of
1. 15A
2. 20A
3. 63A
4. 10A
Which of the following is neither current nor voltage operated relay?
1. LTR
2. TTR
3. BIR
4. ABR
Coil resistance of OLP/EFRP at 20 degree Celsius is
1. 100 Ohms
2. 150 Ohms
3. 173 Ohms
4. 196 Ohms
Which of these should be in open condition in order for SR to pick up?
1. Tap Changers
2. Motor Contactors
3. Negative Contactors
4. None of these
Resetting of OLP is done through
1. OL reset switch
2. Manual reset
3. Cannot reset
4. None of these
AOVR is located in
1. Switch Group 1
2. Relay panel
3. LT room
4. Switch Group 2
Pulse generator for speed measurement is attached in wheel no
1. 1
2. 2
3. 3
4. 4
The number of pulses for one wheel axle rotation is given by
1. 100
2. 120
3. 60
4. 80
Maximum voltage across that can be taken from the first notch is
1. 38 V
2. 78.2V
3. 100V
4. 45V
Minimum Closing voltage for LTR is
1. 100 V DC
2. 110 V
3. 55 V DC
4. 85 V DC
Height from centre line of coupler to floor level for MEMU/EMU is
1. 1590 mm
2. 1030 mm
3. 1290 mm
4. none of these
The number of relays present behind driver in relay panel is
1. 10
2. 8
3. 6
4. 7
Which of the following is governor bypass switch for Equipment Governor?
1. GS-1
2. GS-2
3. GS-3
4. GS-4
Silica gel breather is found near to
1. choke tank
2. Transformer tank
3. On roof
4. Conservator tank
BIS switch is located at
1. Driver desk
2. LT room
3. HT room
4. None of these
BRH full form is
1. Bogie releasing
  handle
2. Brake releasing handle
3. Brake rigging handle
4. BP releasing handle
Following is a safety item in MEMU
1. head light
2. Flasher Light
3. A Head Light B Flasher Light C Horn
4. All
TL will be in circuit in
1. Even notches
2. All notches
3. Odd notches
4. none
Location of AOVR is
1. Switch group 1
2. Switch group 2
3. Tap changer box
4. Driver cab relay panel
In MEMU maximum MR Pressure is
1. 5.0 kg/cm²
2. 7.0kg/cm²
3. 8.0 kg/cm²
4. 6.0 kg/cm²
Additional limiting valve output pressure in TC
1. 1.6 Kg/cm²
2. 3.5 Kg/cm²
3. 1.8 Kg /cm²
4. 2.5 Kg/cm²
Brake Cylinder Pressure in MEMU-MC is
1. 1.2 kg/cm²
2. 1.4 kg/cm²
3. 1.6 kg/cm²
4. 2 kg/cm²
Auto brake releasing time in MEMU
1. 2-4 sec
2. 5.5-6.5sec
3. 5.5- 7 sec
4. 2.7-3.5 sec
No.of Positions in brake controllers
1. 6
2. 5
3. 7
4. 4
Which pressure is dropped while applying the guard emergency brake
1. BP
2. MR
3. AR
4. ER
Which valve energized first while applying partial EP
1. HMV
2. AMV
3. SBV
4. PRV
In MEMU one of the following is a part of brake controller
1. Tripple valve
2. Equalizing discharge valve
3. Safety valve
4. Application magnet valve
In MEMU one of the following is a part of EP unit
1. Equalizing valve
2. Triple valve
3. Puppet valve
4. none of the above
Safety valve of Main compressor is set at
1. 8 kg/sq.cm
2. 7 kg/sq.cm
3. 6 kg/sq.cm
4. 5 kg/sq.cm
Pressure build up time for auxiliary compressor is approx
1. 6 mins
2. 7 mins
3. 12 mins
4. 8 mins
In Puppet valve, C&D are called _______ ports
1. Equalising
2. Limiting
3. Charging
4. Discharging
In Puppet valve, A&B are called _______ ports
1. Equalising
2. Limiting
3. Charging
4. Discharging
PB reservoir capacity is
1. 20L
2. 10L
3. 15L
4. 9L
Capacity of Air suspension One supplementary reservoir of MC is
1. 15L
2. 20L
3. 30L
4. 40L
EP Unit has how many ports
1. 6
2. 5
3. 4
4. 7
In DMH brake, entire BP is exhausted through which valve?
1. pilot valve
2. Equalizing discharge
  Valve
3. Triple valve
4. Emergency brake Valve
Application Magnet valve gets supply from which wire
1. 36
2. 37
3. 38
4. 39
In EP position , which ports are in closed condition in puppet valve?
1. A & B
2. B & D
3. C & D
4. A & C
Holding Magnet valve gets supply from which wire
1. 37
2. 38
3. 36
4. 39
In Auto position which ports are in open condition in puppet valve?
1. A
2. B
3. C
4. D
Capacity of pantograph reservoir is
1. 120 L
2. 100 L
3. 90 L
4. 150 L
required for raising the pantograph Minimum pressure is
1. 6 kg/sq.cm
2. 4.5 kg/sq.cm
3. 5 kg/sq.cm
4. 7 kg/sq.cm
Minimum pressure required for working of Tapchanger is
1. 4 kg/sq.cm
2. 4.5 kg/sq.cm
3. 3.16 kg/sq.cm
4. 5 kg/sq.cm
Pressure from baby compressor is used for which operation?
1. Brake Application
2. Horns
3. VCB closing
4. None of these
The relative humidity of air at the outlet of Air drier should be approx
1. <45%
2. <10%
3. <25%
4. <35%
Secondary Suspension in MEMU is recently received coaches is
1. Air Suspension
2. Helical Spring
3. Bolster Frame
4. Dash Pot
Shacku coupler lateral movement is restricted by
1. Pull Rod
2. Brake Hanger
3. Centering device
4. Lateral Dampers
Cacitapy of Air suspension reservoir in MEMU Coach in liters
1. 150L
2. 110L
3. 120L
4. 90L
Vertical load of Bogie is carried by
1. Side bearers
2. Centre Pivot
3. Helical springs
4. None of these
What is the condemn wheel dia. of MEMU motor coach in mm
1. 877
2. 850
3. 919
4. 910
How many types of wheel discs are used in MEMU coaches
1. 3
2. 2
3. 4
4. 5
which type of wheel disc are used in MEMU coaches
1. Cast
2. Forged
3. A & B
4. None
how many vertical dampers are provided in air spring suspension MC
1. 4
2. 5
3. 6
4. 7
how many colour codes are given to the helical springs according to their strength
1. 2
2. 3
3. 4
4. 5
new dimension of bogie transom noses
1. 241.506mm
2. 243.0mm
3. 245.0mm
4. 246.0mm
If traction motor No. 4 is grounded, which of the following Relay will act
1. OL 4
2. OLP
3. OL 1 AND 4
4. EFRP
material used in top and bottom axle bearing
1. brass
2. gun metal
3. phosphorus bronze
4. bronze
Lubricating oil used for Kirloskar make main compressor 3HC-55
1. SS-68
2. SAE 120
3. SAE 150
4. SS-100
Condemn diameter of commutator for TM make 4601 BX is
1. 305 mm
2. 310 mm
3. 325.5 mm
4. 305 mm
How much voltage is required for load testing of traction motor
1. 50
2. 60
3. 40
4. 65
What type of the brush grades used in 4601 Traction Motor?
1. EG14D
2. E88X(I) C
3. EG7097
4. All of these
What percent is the pinion bedding is required to fitment of pinion on shaft?
1. 90%
2. 80%
3. 60%
4. 95%

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