AC Locos:

1. Safety Relays are

a) All DI type b) All DU type

c) All DI & DU type d) Some are DU type and some are DI type.

Ans: c

2. DI Type safety relays are

a) QOP, QOA b) QRSI, QLA, QLM

c) QOP, QPDJ d) Q44, Q118

Ans: b

3. DU type safety relays are

a) QOP, QOA b) QLM, QRSI

c) Q44 d) Q118

Ans: a

4. CT ratio of RSILM:___________

a) 1000 : 5 b) 2000 : 5

c) 4000 : 5 d) 1000 : 15

Ans: c

5. CT ratio of TFILM

a) 50 : 5 b) 100 : 5

c) 250 : 5 d) 200 : 5
Ans: c

6. Pick up voltage of Q20 in WAP4 locos:

a) 790 V b) 800 V

c) 865 V d) 850 V
Ans: a

7. While RB is in service which relay will act if any earth fault occurs in the power
 circuit in WAG-7 loco.

a) QOP1 b) QOP2

c) QOA d) QLM

Ans: b

8. The resistance value of RU in WAP4 locos is

a) 88 kΏ b) 100 kΏ c) 120 kΏ d) 220 kΏ

Ans: a

9. The resistance value of RQ20 in WAP4 locos or 6P locos

a) 2.4 kΏ b) 13.2 kΏ c) 24kΏ d) 10 kΏ

Ans: b

10. The setting value of Q44 is

a) 1 sec b) 2 sec c) 5 sec d) 0.6 sec

Ans: d

11. The setting value of Q118 is

a) 2.5 sec b) 5.0 sec c) 0.6 sec d) 1.5 sec

Ans: b

12. In twin Beam headlight the rating of bulb is ______

a) 24V, 70/75W b) 24V, 90/100W

c) 110V, 70/75W d) 110V, 90/100W

Ans: b

13. The input / output voltage ratings of the DC-DC converter are:

a) 110V / 110V b) 110V/50V

c) 110V / 24V d) 110V/20V

Ans: c

14. In a twin beam Headlight, what is the voltage of bulb in “dimmer” operation.

a) 110V b) 55V c) 24V d) 12V

 Ans: d

15. What is the advantage of twin beam headlights system:

a).Headlight glows while passing on neutral section.

b).Headlight focusing is good.

c).Even one bulb fuses also, it will not effect the running of loco to destination.

d).All the above

Ans: a

16. The rating of a cab heater is.

a) 500Ώ, 500W (b) 400 Ώ,500W (c) 100 Ώ,500W (d) 50 Ώ,500W

Ans: a

17. How many CPs are required for Air brake loco:

(a) Minimum 2 CPs (b) Maximum 2 CPs

(c) Minimum 3 CPs (d) Maximum 3 CPs

Ans: d

18. What is class of Insulation specified for 180 degree temperature:

(a) B class (b) A class (c) H class (d) Y class.

Ans: c

19. The object of sanders is to

(a) Improve the adhension (b) Avoid wheel slipping

(c) To have momentum (d) All the above

Ans: b

20. The specific gravity of Electrolyte of a lead acid battery at 27 ˚C should be

(a) 1.250 (b) 1.200 (c) 1.100 (d) 1.180

Ans: a

21. Specific gravity of electrolyte is measured using.

(a) Thermometer (b) Hygrometer (c) Hydrometer (d) Lactometer
 Ans: c

22. DC series motor is used for traction purpose because:

(a) High speed (b)High starting torque
(c) Low starting torque (d) Constant torque at all speeds.
Ans: b
23. Size of each cable connected to Traction Motor is

(a) 120 Sq.mm (b) 150 Sq.mm (c) 300 Sq.mm (d) 170 Sq.mm
Ans: c

24. Size of each cable connected to MVMT1/MVMT2/MRH in AC locomotive is

a).3 sq.mm (b) 10 sq.mm (c) 25 sq.mm (d) 50 Sq.mm

Ans: c

25. Size of each cable connected to MCP/MPH is

(a) 3 Sq.mm (b) 10 Sq.mm (c) 25 Sq.mm (d) 50 Sq.mm

Ans: b

26. Size of cable used in control circuits is

(a).3 Sq.mm (b) 10 Sq.mm (c) 25 Sq.mm (d) 50 Sq.mm

Ans: a

27. Size of cable connected to Arno

(a).100 Sq.mm (b) 150 Sq.mm (c) 120 Sq.mm (d) 150 or 120 Sq.mm
Ans: b

28. Braking excitation transformer purpose is to.

(a).Excitation of armature (b). Excitation of field
(c). Excitation of both (d). Excitation of TFP

Ans: b

29. BP1 DJ is pressed

(a)To starts the loco (b) To stop the loco (c) To close DJ (d) To trip DJ

Ans: c

30. HQOP & HQOA are

(a).Earth fault relay by pass switches (b) Earth fault relay isolation switches
 (c).Earth fault relays (d) All the above.

Ans: a

31. Flasher light is provided in loco/MEMU

(a).To communicate with the loco driver coming in the opposite direction

about any difficulty.

(b).To communicate with the loco driver coming in the same direction, about any
Difficulty.

(c).To inform the opposite coming loco driver about the abnormality noticed

about OHE/Track.

(d).All above.

Ans: d

32. EM contactor pressure is

(a) 650 to 800 gms (b) 600 to 700 gms
(c) 600 to 750 gms (d) 800 to 1100 gms
Ans: d

33. Electrolyte used in a lead acid battery is

(a) Concentrated sulphuric acid (b) Diluted sulphuric acid

(c) Nitric acid (d) None of above

Ans: b

34. The fuse rating of CCPT is

(a) 6 AMPS (b) 10 Amps (c) 16 Amps (d) 35 Amps

Ans: c

35. CHBA function is normally

a) To supply the DC charging current to batteries

b) To supply the D.C. load current to various control circuits

c) To supply the current to Auxiliary motors

d) Both (a) & (b)

Ans: d
36. The purpose to RSI Block is
(a) To convert AC to DC (b) To convert DC to AC

(c) To generate AC (d) To generate DC

Ans: a

37. Battery negative is connected to loco body through

(a) HQOP (b) HQOA (c) HOBA (d) HQCVAR

Ans: c

38. MVMT1/MVMT2 are meant for cooling of

(a) Armature of TM (b) Field coils of TM

(c) Stator of TM (d) All of these

Ans: d

39. Shunting contactors are provided in the loco for the purpose of

(a) Increasing the speed (b) To decrease the speed

(c)To stabilize the speed (d) to stop the train.

Ans: a

40. The speed control method used in AC locomotive/MEMU

(a) Voltage control (b) Current control

(c) Rheostatic control (d) Regenerative control

Ans: a

41. The type of Electric braking system used in WAP4 locomotive is

(a) Regenerative (b) Rheostatic (c) Both

(d) none

Ans: b

42. Instrument used to measure contact resistance

a) Whetstone bridge b) Multi meter c) Micro ohmmeter.

(d) none
 Ans: c

43. Action in lead acid cell

a).Reversible b) Irreversible c) Both a&b

(d) none

Ans: a

44. Purpose of inter pole in the traction motor

a).To avoid sparking on the commutator b).To avoid bad commutation

c). To divert field current

d). both a & b.

Ans: d

45. During rheostat braking traction motor works as a

a).Generator b) Converter c) Motor d) Inverter

46. The relay QOP/QOA is the relays of sensing

a) Voltage b) Current c) Resistance.

Ans: a

47. In WAP-4 locomotive, BP pressure not building up

a) A9 defective

b) C3W defective

c) SA9 defective

d) R6

Ans: a
48. In WAP-4 locomotive, MR pressure not building up

a) A8 cock closed condition

b) Bogie cocks closed condition

c) VEAD cock closed

d) MR cock drain cock open

Ans: d

49. In WAP-4 locomotive, MCPA pressure not building up on run

a) VESA air leaking

b) VEAD air leaking

c) IP (E) air leaking

d) DJ oil separator drain cock open

Ans: d

50. In MU loco driver experienced rear loco brakes are not applying found the
following trouble

a) MU2B leading loco in leading

b) MU2B tailing loco in leading

c) A1 differential cock closed

d) SA9 problem

e) None

Ans: b
51. Duplex check valve defective in WAP4 loco which resulted to

a) Horn/wiper not working

b) Horn / sanders not working

c) Horn/FP not working

d) All the above

Ans: d

52 Different gear ratios in WAG-9 loco is

a.15:77, 18:64 b.15:77, 20:72
c.15:77, 21:107 d.15:77, 17:77
Ans: b

53 Maximum braking effort of WAP-7 Loco is

a.260KN b.160KN
c.182KN d.None of the above
Ans: b
54 ZV-ZV Valve sets consists of
a.2 GTOs and 2 Diodes b.4 GTOs and 4 Diodes
c.5 GTOs and 3 Diodes d.5 GTOs and 3 Diodes
Ans: b
55 Voltage applied to Traction Motors (Phase to Phase) in WAG-9 loco is
a.2180 Volts b.2800 Volts
c.750 Volts d.None of the above
Ans: a
56 If ZBAN is switched “ON”
a.FP drops to zero b.Over charging of BP takes place
c.BP drops to zero d.BP & FP drops to zero
Ans: c

57 Machine Room blower-I receives supply from

a.BUR-1 b.BUR-2
c.415 Volts directly from Transformer d.110Volts directly from
Transformer
Ans: c
58 Machine Room blower works
a.In cooling mode b.In driving mode
c.In cooling and Driving modes d.In Driving and self hold
mode
Ans: c
59 Minimum Voltage relay in 3 phase locos is for
a. Sensing of OHE voltage in driving mode
b. Sensing of OHE voltage in cooling mode
 c. Voltage protection in Self-hold mode
d. Voltage protection in simulation mode
Ans: b
60 Purpose of using single phase machine Room blower in 3 phase locos
a. Facilitating to work in diving mode for cooling machine room
b. Facilitating to work self hold mode for cooling machine room
c. Facilitating to work simulation mode for cooling machine room
d. Facilitating to work cooling mode for cooling machine room
Ans: d
61 Minimum voltage relay in three phase locos
a.86 in SB-2 b.78 in SB-1
c.86 in SB-1 d.78 in SB-2
Ans: c
62 For working in cooling mode BL is to be operated from
a.D-OFF-C b.OFF-C
c.D-OFF-C-OFF-C d.b & c
Ans: d
63 Continuous glowing of LSFI indicates
a.Any of the sub-system is isolated b.A priority-II fault
c.Any auxiliary motor is isolated d.None of the above
Ans: a
64 DC Link voltage of Traction Converter is
a.1172 Volts b.2180 Volts
c.2800 Volts d.None of the above
Ans: c
65 Traction Motors in three phase loco are
a.3 Phase slip ring induction motor b. 3 Phase synchronous motor
c.3 Phase squirrel cage induction motors d. DC series motor
Ans: c
66 Battery charger rectifier in 3 phase locos:
a.Half Wave b.Bridge Full wave
c.Full Wave center tap d.Both b & c
Ans: b
67 BUS STATION cooling fans work on
a.110Volts b.48Volts DC
c.24Volts DC d.110Volts AC
Ans: c
68 MUB acts when DC link Voltage reaches:
a.2800 Volts b.2100 Volts
c.3200 Volts d.3000 Volts
Ans: c
69 VCB trips when transformer oil temperature rises to
a.80 degrees b.84 degree
c.75 degrees d.70 degrees
Ans: b
70 Output of Auxiliary winding is
 a.415Volts b.1000Volts
b.2100Volts d.1200Volts
Ans: b
71 In three phases locos Priority-II message means
a.Trips VCB b.Shut down loco
b.Isolates sub-system d.Allows normal functioning
Ans: d
72 .“ASC:0081-PS Fault Storage CGP” message is logged in three phases based on
a.Differential voltage b.Differential current
b.Differential earth fault d.None of the above
Ans: b
73 VCB trips when auxiliary circuit current exceeds
a.280Amps b.400Amps
c.500Amps d.1000Amps
Ans: b
74 Output frequency of a Traction Converter is
a.60-120HZ b.62-132HZ
b.50-100HZ c.None of the above
Ans: c
75 ZTEL switch is used in
a.Banking mode b.Inching mode
c.Simulation mode d.None of the above
Ans: b
76 Type of batteries used in three phase locos
a.NiCd b.Both a & c
c.Lead Acid d.None of the above
Ans: a
77 Primary over current relay is
a.89.7 b.78
b.89.6 d.86
Ans:b
78 Time delay of Timer relay in MR Blower
a.08 Sec b.10 Sec
c.12 Sec d.05 Sec
Ans: b
79 Current rating of OCB MCB is
a.40 Amps b.63 Amps
c.80 Amps d.16 Amps
Ans: b
80 In STB-1 signal “AMSB 0102 LVCB” “L” indicates
a.Action of the loco driver b.Message
c.Command order d.None of the above
Ans: a
81 The brake application time through DBC in WAG-9 locos is
a.06 to 09 secs b.10 to 15 secs
c.15 to 20 secs d.none of the above
 Ans: d

82 Number of electronic cards available in E-70 panel

a.4 b.6
c.2 d.3
Ans: a
83 The pressure switch associated with working of Baby compressor is
a. Pn 26 b.n 60
c.Pn 59 d.Pn 6
Ans: a
84 The number of PBU available in WAP-7 locos is
a.04 b.12
c.02 d.08
Ans: a
85 The number of sanders to be kept in service in WAP-7 locos is
a.08 b.12
c.04 d.None
Ans: a
86 In E-70 brake system locos the coc-47 is used for
a.Moving the loco dead b.Application of brakes through
A9
c.Operation/Isolation of PBU d.Operation/Isolation of sanders
Ans: a
87 The size of choke available in sander circuit in WAG-9/WAP-7 locos is
a.5.5mm b.2mm
c.3 mm d.4mm
Ans: c
88 The switch used for isolation of vigilance control device is
a.125 b.154
c.160 d.237.1
Ans: d
89 The operating pressure of contactors in TC1, 2 & HF
a.10kg/sqcm b.6kg/sqcm
c.5kg/sqcm d.8kg/sqcm
Ans: d
90 The pressure switch used for monitoring working of pantograph is
a. Pn 44 b. Pn 60
c. Pn 09 d. Pn 26
Ans: c
91 After completion of self-test in 3Ø locomotives following node will
appear
a.590 b.570
 c.550 d.504
Ans: d
92 Conversion of BP control pressure into electrical signal in 3Ø
locomotives is done by_________________.
a.Pressure sensor b.Pressure switch
c.Pressure transducer d.None of the above
Ans: c
93 260 indicate ____________________equipment.
a.Filter block b.SR rack
c.Pneumatic panel d.BUR
Ans: c
94 Valve set 13 consists of __________________number of GTOs.
a.2 b.1 c.4 d.3
Ans: d
95 MUB GTO is present in ___________________valve set.
a.12/1 b.12/2
c.12/2 d.13/1
Ans: d
96 MU is not possible if _______________card is defective in any one of the
3Ø locomotives.
a.SLG1 b.ALG1
c.FLG1 d.SLG2
Ans: c
97 . If MVR is not picking up then____________________________.
a.Traction not possible b.RB not possible
c.Cooling mode not possible d.Driving mode not possible
Ans: c
98 ___________________&___________________processor cards present
only
in VCU1 and VCU2 respectively.
a.FBV, DIA b.STB, FBV
c.ZBV, DIA d.STB, ZBV
Ans: c
99 ____________________no. of processor cards is interchangeable between
VCU1 and VCU2 after reloading the appropriate software.
a.2 b.5
c.6 d.3
Ans: b
100 SLG1 & SLG2 is interchangeable by changing______________________.
a.Hex address & Software b.Software
c.Hex address only d.Not interchangeable
Ans: a
101 TM speed sensor output is connected to __________________card in the
_____________rack.
a.ASC PERI, SR b.NSC PERI, SR
c.STB, VCU d.HBB, VCU
Ans: a
102 Number of TFP and SR oil pressure sensors available in loco are
___________ and _____________respectively.
a.4, 4 b.4, 2 c.2, 4 d.1, 2
Ans: b
103 BUR 1 & 2 operate at ___________________Frequencies.
i)37 Hz ii)50 Hz iii) 44 Hz

a. I & II b. I, II & III

c. II only d. I & III
Ans: a
104 Consider following activities
1.SR changing
2.SRMPH changing
3.OCB radiator changing
4.VCB changing

Which of the above activities requires roof lifting?

a.1 & 4 b.2 & 3
c. 2 & 4 d.1 & 3
Ans: d

105 Consider following activities

1.TM changing
2.Wheel Set changing
3.Axle damper changing
4.PHS changing

Which of the above activities requires loco lifting?

a. 1 & 4 b.3 & 4
c. 2 & 3 d.1 & 2
Ans: d
106 Correct arrangement of foot switches in 3Ø locomotives from Left to
right in loco cab is___________.

L M R
a. PVCD PVEF PSA
 b. PSA PVCD PVEF
c. PVEF PSA PVCD
d. PSA PVEF PVCD
Ans: d
107 In SR1 rack of 3Ø locomotives, speed sensor connected to Sub-D “C”
senses speed of ____________________________.
a.TM 3 b.TM 2
c.TM 1 d.TM 4
Ans: b
108 Following combinations of gear ratios are used for WAG9
locomotive_________________.
a.23:58 & 20:72 b.23:72 & 20:58
c.20:72 & 21:107 d.15:77 & 21:107
Ans: c
109 For performing shunting _________switch to be kept in
_________position nd the speed limit is __________kmph.
a.154, ‘I”, 10 kmph
b.152, ‘0”, 5 kmph
c.160, ‘I”, 15 kmph
d.162, ‘0”, 5 kmph
Ans: c
110 While working loco in _____________mode, VCD need not be
acknowledged.
a.Shunting b.Constant Speed
c.Inching mode d.Braking mode
Ans: c
111 Which of the following statement is correct.
a) Teeth of bull gear of WAG9 ≤ Teeth of bull gear of WAP7
b) Teeth of pinion of WAG9 > Teeth of pinion of WAP7
c) Teeth of bull gear of WAG9 > Teeth of bull gear of WAP7
d) None of the above
Ans: c
112 The number of teeth on the M/s ARC make Hall effect speed sensor
ring
are_____________.
a. 30 b.120
c. 60 d.90
Ans: b
113 If the TM rotates at a speed of 600 rpm then the frequency of pulse
generated by ARC make speed sensor is_____________________.
a. 1.8 KHz b.0.6KHz
c. 0.3 KHz d..2 KHz
 Ans: d
114 Consider following statements
1.No Inductance variation between different phases of motor
2.Low IR value
3.Low Temp. rise above ambient during run test
4.Low dB level recorded during run test
Which of the above statements indicates healthy motor?

a.1, 2 & 3 b. 2, 3 & 4

c.1, 3 & 4 d.1, 2 & 4
Ans: c
115 Contactor 52/2 in auxiliary circuit is used for redistribution
of________________.
a.MRB b. SCTMB
c.TMB d.Battery Charger
Ans: d
116 If any one the BURs isolated which of the following indicates correct
position of 52.4/1, 52.4/2, 52.5/1 &52.5/2 Contactors.
52.4/1 52.4/2 52.5/1 52.5/2

a. close close close open

b.close open close open
c. close open close close
d.close open open close
Ans: d

117 Which of the following statements is correct?

a.89.5 – Earth fault relay in auxiliary converter and it is located in HB1
panel
b.89.5 – Earth fault relay in 415/110v and it is located in HB2 panel
c.89.5 – Earth fault relay in auxiliary converter and it is located in HB2
panel
d.89.5 – Earth fault relay in 415/110v and it is located in HB1 panel
Ans: d
118 24V and 48V DC-DC converter feeds _________________ and
_________________respectively.
a.Electronic rack cooling fan & Indication lamps
b.Indication lamps & Electronic rack cooling fan
c.Indication lamps & Head light
d.Head light & Indication lamps
Ans: b
119 Transformer in 3Ø locomotives is having ____________number of
 windings.
a.5 b.6
c.7 d.8
Ans:c
120 MCB for machine room lightning is ________________.
a.310.1/1 b. 310.7
c.338.1 d.310.4
Ans: d
121 ________number of change over contactors are provided in auxiliary
circuit of 3Ø locomotives.
a.6 b. 9
c.10 d.8
Ans: b
122 Which of the following is not a valid info. for “ASC1:0082 PS fault
storage GBC”.
a.1106 b. 120D
c.130E d. 1406
Ans: d
123 Type of three phase locomotive available on Indian Railways
a) WAP1/WAP5/WAP4
b) WAG7/WAG9/WAP7
c) WAP5/WAP7/WAG9
Ans: c
124 Type of motor used in 3 phase locomotives
a) DC series motor
b) Three phase IM
c) Single phase IM
Ans: b
125 Advantage of three phase locos.
a) Regenerative basis
b) UPF
c) Both a & b
d) None of the above
Ans:a
126 In 3 phase locomotives, three phase indicates?
a) Three phase OHE supply system
b) Three phase supply to the motor
c) Both a & b
d) None of the above
Ans: b
127 Higher horse power locomotive available with type of locomotive on Indian
Railways.
a) WAG9
b) WAP7
c) Both a & b
 d) WAP4
Ans: a
128 Important power device used in three locomotive for power conversion
a) IGBT
b) GTO
c) Transistor
d) IGCT
Ans: a
129 . Type of Pantograph used in 3 phase
a) AM12
b) AM92
c) IR03
d) Both b & c
Ans: a
130 Sub System Sub System Number
a).BUR3 1)3
b).SR2 2)2
c).HF 3)10
d).FDU 4)8
e).Brake Electronics 5)9
6)4
7)15
Ans: a-4, b-1, c-6, d-7, e-3
131 Contactor Number Description
a).8.1 1) Contactor converter pre. Charging
b).12.3/1 2) Harmonic filter contactor
c).8.41 3) Capacitor bank DC link
d).15.5/2 4) Pre charging resistance of converter
e).14/2 5) Contactor for discharging resistor
Ans: a-2, b-1, c-5, d-3, e-4

132 Sensor Number Description

a).6.1 1) Current sensor drive inverter
b).3 2) Primary current transformer
c). 18.5 3) Primary voltage transformer
d).18.2 4) Voltage indicator DC link
e).15.7 5) Current sensor line converter
Ans: a-2, b-3, c-1, d-5, e-4

133 MCB Corresponding Auxiliary

a).59.1 1) MCB of Scavanger for MRB
b).53.1 2) MCB for OCB
c).56.1 3) MCB for TMB
d).47.1 4) MCB for TFP-MPH
e).63.1 5) MCB for MCP
 6) MCB for SRMP
Ans: a-2, b-3, c-1, d-5, e-6

134 Component Description

a).WRE Module 1) Drive converter for SR
b).Wandler Module 2) Primary Voltage Transformer
c).NSR 3) Rectifier Module for BUR
d).ASR 4) Inverter module for BUR
e).GG Module 5) Line converter for SR

Ans: a-4, b-2, c-5, d-1, e-3

135 MCB Description

a).100 1) MCB for loco control electronics
b).110 2) MCB for Battery charger input
c). 112.1 3) MCB for Machine room lighting
d).112 4) MCB for Battery
e).310.4 5) MCB for Battery charger output
Ans: a-2, b-5, c-1, d-4, e-3

136 Component Location

a).FDU 1) HB2
b).MCR 2) HB1
c).Wandler Module 3) SB2
d).Aux Transformer 415/110v 4) SR
e).Earth Fault Relay Aux 5) SB1
Ans: a-3, b-5, c-4, d-2, e-1

137 Component Description

a).ZTEL 1) Asst. Loco pilot desk Lamp
b).ZK 2) Switch for Max. Traction Limitation
c).LSCE 3) DC link
d).ZLI 4) Switch Instrument lighting
e).ZLDA 5) Indication lamp for over temp. CEL

Ans: a-2, b-3, c-5, d-4, e-1

138 Pneumatic Component Description

a).70 coc 1) FP charging coc
b).74 coc 2) BP charging coc
c).47 coc 3) Emergency exhaust coc
d).136 coc 4) Dead loco AR charging coc
Ans: a-2, b-3, c-4, d-1

139 Pressure Switch Description

a).172.2 1) Pressure switch emergency
 brake
b).269.4 2) Pressure switch low MR
c).269.6 3) Pressure switch main
compressor
(8Kg)
d).269.1 4) Pressure switch loco brake
e).269.2 5) Pressure switch brake cylinder
Ans: a-3, b-2, c-5, d-1, e-4

140 Bearing type Location

a).NU330 1)CE bearing for HS15250A
b).NJ320 2)PE bearing for HS15250A
c).NJ324 3)DE bearing for FRA6068
d).NU2236 4)NDE bearing for FRA6068
Ans: a-2, b-4, c-1, d-3

141 No. of BURs working Condition of Load sharing contactors

a).All BURs in service 1) 52/3, 52/4 & 52/5 closed
b).Only BUR1 Isolated 2) 52/1, 52/3 & 52/5 closed
c).Only BUR2 Isolated 3) 52/4, 52/2 & 52/5 closed
d).Only BUR3 Isolated 4) 52/1, 52/3 & 52/4 closed
Ans: a-2, b-4, c-1, d-3

142 Component Location

a).MCP 1) Machine Room
b).Filter block resistance 2) under gear item
c).FDU 3) CAB item
d).DBC 4) Roof item
Ans: a-2, b-4,c-1, d-3

143 Condition of BURs in ELS/LGD Number of Aux. Load

a).Total Aux. loads on all BURs 1) 6
b).Total Aux. loads on BUR2 when 2) 13
all BURs are working
c).Total Aux. loads on BUR2 when 3) 8
only BUR1 isolated
d).Total Aux. loads on BUR3 when 4) 7
only BUR1 isolated
Ans: a-2, b-3, c-1, d-4

144 Node Number Action

a).570 1) After raising PT
b).550 2) After closing DJ
c).596 3) After selection of
direction
d).504 4) Self-Test complete
 e).590 5) After taking Throttle
Ans: a-2, b-1, c-5, d-4, e-3

145 Equipment Number Description

a) 47 1) Contactor for MCP
b) 47.1 2) MCP
c) 47.2 3) MCB for MCP
d) 47.2A 4) Snubber circuit for
contactor
Ans: a-2, b-3, c-1, d-4

146 The grease used for lubrication of bearings of FRA 6068

is____________________.
a. SHC 120
b. K
c. Both a & b
d. None of the above
Ans: a
147 Pre charging contactor in SR is used for _________________.
a. Reducing inrush current
b. Reducing inrush voltage
c. Reducing inrush voltage & current
d. None of the above
Ans: a
148 .“NSC2: 0082 PS fault storage GBC” with Zinfo:1312 hex indicates defect in
_____________valve set.
a. 12/2 valve
b. C
c. Both a & b
d. None of the above
Ans: a
149 ZV-MV valve set consists of _____________ number of GTOs and ______
number of Diodes
a. 4 GTOs and 4 Diodes
b. 16 GTOs and 16 Diodes
c. 8 GTOs and 8 Diodes
d. 2 GTOs and 2 Diodes
Ans: a
150 The brake rigging arrangement of WAP7 locomotives is similar to
__________locomotive
a. WAG-7
b. WAG-9
c. Both a & b
d. None of the above
Ans: a