Q1: With the help of a sketch,
define station limits for “B” class stations equipped with two Aspect
signalling on single line and double line sections.
Q2: What are the
classifications of stations in Indian Railways?
Q3: What do you mean by “Read
Back Technique” in Railway signalling? Please cite few examples of this
technique being used in your Railway.
Q4: What is the difference
between “A” Marker and “A” Board in Railway signalling?
Q5: What is the normal aspect
of a signal in Automatic signalling territory?
Q6: What do you mean by Slip
siding and Catch siding? Write down cases when Slip siding and Catch siding are
required to be provided in the Railway system.
Q7: In Indian Railways, what
are the systems of train working adopted? Please also mention the name of the
most widely used system on Indian Railways.
Q8: Please prepare the locking
table for Lever numbers 1, 3, 4, 6 & 7 of the following diagram: -
Q9: What are the essential
requirements of the Absolute Block System?
Q10: What are the standards of
interlocking prescribed in Railway Signalling?
Q11: What are the different
classes of LC gates? Please explain.
Q12: What do you mean by the
term “Route Holding” in Railway signalling? Please explain the various means to
achieve the same.
Q13: What do you mean by
“Loose” and “Tight” locking in Railway signalling? Please explain with
examples.
Q14: What do you mean by
Ballast Resistance? What are the minimum permissible values for the ballast
resistance in the station yard and in the Block section?
Q15: What do you mean by the
staggering of adjacent track circuit rail polarities and why is this required?
Q16: List the names of various
types of traction bonds used in RE area using DC track circuits.
Q17: Write down the adjustment
of DC track circuit for failsafe and reliable working.
Q18:
What do you mean by Fouling Protection of Track? Please explain.
Q19: What is Dead Section in
track circuit area and how can it be eliminated?
Q20: What do you mean by cut
section track circuit and/or fed over track circuits?
Q21: Can an AFTC be used in a track
section with steel sleepers? Why?
Q22: What do you mean by “End
Fed” and “Centre Fed” types of AFTCs along-with corresponding maximum
permissible lengths of track circuits?
Q23: What are the various types
of Bonds being used in AFTCs?
Q24: Please list the names of
the constituent parts of a Electrical Lever Lock and its functioning.
Q25: What do you mean by
Indication Locking and Track Locking and on which levers these are being used?
Q26: Explain the working of
Snubbing Circuit in Point machine operation using 3-wire control.
Q27: What is the concept of
Cross protection in signalling circuits? Please explain.
Q28: Explain the working of
4-wire point detection circuit using circuit diagram.
Q29: What do you mean by super
imposed detection of points? As per the latest directives of Railway Board, is
it suggested to use this arrangement?
Q30: Write down the general
features of IRS Rotary Type point machines with 143 mm stroke.
Q31: Explain the working of
Point operation circuit using Siemens Point Contactor unit in an
electromechanical installation.
Q32: What do you mean by RHS
and LHS turnouts? Can we use the same type of Point machine (IRS Rotary type)
for both the turnouts? Please explain.
Q33: Compare different types of
conventional signal lamps.
Q34: What are the different
types of ECRs being used with conventional signal lamps?
Q35: What are Triple Pole
lamps? Describe their merits over Double pole lamps.
Q36: What do you mean by H-Type,
I-Type and L-Type signal transformers along-with their uses?
Q37: What is Aspect Control and
Aspect Control circuits? Draw an aspect control circuit
for
an inner distant signal in Double Distant signalling territory.
Q38: What is cascading of
signal aspects? Explain with suitable circuit diagram.
Q39: What do you mean by Red
Lamp Protection? Expalin with suitable diagrams.
Q40: What do you mean by
Cutting in Arrangement in signalling circuits and reason for its use?
Q41: What do you mean by
“Direct Feeding”, “Local Feeding” and “Remote Feeding” of signals? Explain.
Q42: Describe the advantages of
LED signal Lamps over conventional signal lamps.
Q43: What are the various PVC
signal cables used in Railway signalling in SECR? Are they screened one or not?
Q44: What do you mean by cable
meggering? Please explain.
Q45: What is Electric Signal
Reverser? List different types of Electric Signal Reversers being used over
Indian Railways.
Q46: What do you mean by EKT?
Describe the working of EKT.
Q47: What do you mean by TS,
TSS, FP, SP & SSP? Please explain.
Q48: What are the effects of RE
in signalling?
Q49: List the names of various
types of Block Instruments being used in stations on Single/Double line and RE/Non-RE
area. What special feature is incorporated in the block instruments meant for
use in RE area?
Q50: What do you mean by
maximum length of parallelism in Railway Signalling over
RE area? Explain.
Q51: Why the repeater relays of
track Relays are made Slow To Pick-up and with what time delay and why?
Explain.
Q52: What are the reasons
behind using various traction bonds in Track Circuits over RE area?
Q53: What arrangements/changes
are required to be carried out in the DC track circuits being used in RE area
w.r.t. Non-RE area?
Q54: What are the effects of RE
in signalling circuits and how are they minimised?
Q55: List the various types of
Route indicators used in Railway Signalling and which type is being commonly
used in Indian Railways?
Q56:
What are the items which are being used to increase the length of a DC track
circuit in RE area? What are the maximum permissible length of track circuits
in Single and Double line section on RE area?
Q57: What are the maximum
permissible distances for direct feeding of signals on Single and Double line
section in RE area?
Q58: What are the various means
of suppressing the value of induced voltages at the source of 25 kV traction?
Explain.
Q59: Draw a sketch showing the
arrangement of power supply, neutral section feeding post, sectioning & sub
sectioning posts.
Q60: Draw and explain the State
Transition diagram for the working of Axle Counter.
Q61: What are the different
constituent parts of an axle counter?
Q62: What is Trolley
Suppression Track circuit? Why is it necessary in Axle counter?
Q63: What are approach locking,
back locking and dead approach locking in electrical signalling? Explain with
suitable examples using sketches.
Q64: What do you mean by
Sectional route release in electrical signalling? Explain with suitable example
using sketches.
Q65: What is Crank Handle
Interlocking in Railway signalling? Explain with suitable example using sketch.
Q66: What is LC Gate
Interlocking in Railway signalling? Explain with suitable examples using
sketches.
Q67: What is the working
principle of 24V battery charger used in Railway signalling? Explain with
sketch.
Q68: What do you mean by
Filters in electrical rectifier circuits? What is the difference between the
chargers being used in signalling and telecommunication applications?
Q69: What is IPS? Describe in
detail. How many battery banks are used in IPS in Railway signalling?
Q70: What is electrical
transformer? Explain its working in detail.
Q71: Mention the major
advantages of the SMPS over Thyristor controlled Power supplies.
Q72: What is an Inverter and
where is this being used in Railway Signalling?
Q73:
Calculate the total load in a typical 4 line way side station with one siding
line and a common loop in a Double line section. Draw necessary sketches.
Q74: In a PI installation,
which circuit ensures the “One Signal-One Train” feature?Please mentioned the
name of this circuit and explain with suitable example.
Q75: Explain the signal control
circuit for a home signal with one route with suitable sketch and circuits.
Q76: List the name of
activities pertaining to signal department which require prior sanction of CRS
for their execution in the yards.
Q77: What is the validity
period of CRS sanction? Explain the process for obtaining CRS‟s sanction.
Q78: What do you mean by ground
connections?
Q79: What is the role of
Drawing Office in S&T department?
Q80 What are the equipments to
be provided with a Trolley/Lorry/Motor Trolley?
Q81 What is IB signal? Why this
signal is provided? Is it being provided on single line section? Explain the
working of an IB signal.
Q82 What is the procedure to
pass an IBS signal at its ON aspect by the driver of any train?
Q83: What is half notch? Why is
this provided and in which equipment/instrument?
Q84 Draw the Block Clearance
circuit for SGE Double line instrument using appropriate circuits.
Q85 What are the principles of
Lock and Block working? How these are achieved in SGE Double Line Block
Instrument?
Q86 In Siemens signal group
relays, the GLSR relay is made slow to release. Why? Please explain.
Q87 What are the items to be
checked during scrutiny of Engineering Scale Plan?
Q88 What items will you check
during inspection of a motor operated point?
Q89 What items will you check
during inspection of SSDAC?
Q90 What item are being noted
during day/night footplate?
Q91 What items are being noted
during joint point and crossing inspection with SE/SS(P-Way)?
Q92
Draw the ALSR CKT for signal number S- ?
Q93 How will you councell your
staff to prevent short cut method?
Q94 Why Disconnection Memo
should be issued before attending to maintenance of certain signal gears &
for which activities/works, it should it be issued?
Q95 (a) What is the propose of
using the choke in single rail DC track circuits in RE area?
Q95 (b) What is half notch? Why
is this provided and in which equipment/instrument?
Q96 Draw the complete diagram
of Single Rail DC track circuit in RE area including value of cack component?
Q97 What parameters are being
checked during inspection of Analog Axle Counter and what are their standard
values?
Q98 (a) What are the conditions
for granting line clear in double line B class station on MACLS territory?
Q98 (b) What are the conditions
for granting line clear in single line B class station on Two Aspect CLS
territory?
99. Draw the dog chart of
following: - 2 X 3 W 5 R 6
100. For the given yard draw
the RCC for the following signals: -
– Down Home Signal (S-1), Shunt
Signal (Sh- 26), Starter Signal (S-4) and Calling On signal (Co-2).
FOR SELECTION FROM
JE/I/Tele to SE/Tele
MW
1. What is Radio Patch?
Describe it with the help of a Suitable diagram to patch control circuit, in
case of need.
2. Explain phase lock loop
system with suitable diagram.
3. How rainfall attenuation is
measured in MW communication.
4. What are the advantages of
digital MW communication in comparison with the analog MW?
5.
Write one method of finding the modulation index.
6. Discuss different methods
for avoiding the fading in MW communication.
7. Discuss the salient features
of DTL-MUX equipment.
8. Draw a block diagram of
Transreceiver radio equipment of Digital radio MW.
9. What is the testing carried
out before taking over the charge of digital MW system?
10. Draw the block diagram for
Radio Equipment? 7D6 & 7D15
11. Explain the function of 7D6
& 7D15 Radio Equipment?
12. What is fading? What are
the counter measures Railways adopt to present?
13. What is DTL MUX? Explain it
with diagram?
14. What is the meaning of
video in & video-out signal-in Radio equipment?
15. How many types of measuring
instrument are used in MW circuit? Write short notes on each?
16. Write the short notes to
explain the following?
· Channel Modem Card.
· VFT card.
· Design & set up the MW
Communication in between two MW station and two
telephone exchanges in
Railways?
CONTROL
1. Draw a neat sketch of a six
pin socket wiring practiced in RE area and indicates the advantage in it.
2. Explain in detail DTMF
Signaling and its advantages?
3. Why two tones are
transmitted at a time in DTMF signaling? What are it‟s advantages?
4. What are the types of
traffic train control being used in Railways? Explain each of them?
5. What is total interruption
of control? What is the work procedure at stations in such situations?
RE & 6 Quad CABLE
1. What is meant by Loading in
RE Cable?
2. What is meant by BON? Why
and where it is used in RE Cable?
3. What is meant by Half
Loading Section?
4. What is meant by Screening
Factor in an underground telecommunications cable?
5. Write down types of Telecom
Cable used in Railway for different communication system.
6. Discuss benefits of
replacement of O/H alignment by 6Q cable.
7. Write jointing procedure of
50 pair PIJF cable.
EXCHANGE
1. What is meant by Pulse Code
modulation?
2. Give the working principle
of Digital Exchange & its features.
3. Describe the properties of
earthing used in Telecom with specific values used for resistances, wire
diameter, in each case.
4. Explain the working of SPC
Exchange in brief with block diagram.
5. Describe PCM-TDM with
appropriate diagram where it is used.
6. What are the functions of
Line cards?
7. Explain Call processing in
Electronic Exchange.
8. Write different types of tones
with frequency and „ON‟ and „OFF‟ time duration for each case.
9. What is “hunt group”?
Explain the requirement of hunt groups.
10. What is DID and DOD.
Explain advantages of these.
11. Write down the maintenance
& protection of electronics exchange? How it is better thanstrongers?
12. Advantage of Digital
Exchange over analog Exchange?
13. Write 10 of features of
electronic exchange. Which you would like to have in your exchange?
14.
Draw the basic structure of ISDN Exchange? What are the advantages &
procedure‟s of it‟s working.
15. Explain the structure of
2mbps bit stream with frame & multiframe?
16. Explain Bit-interleaving
and Byte-interleaving?
17. Write down procedure to
augmentation of electronic exchange up to 5000 Lines along with justification.
Prepare the brief estimate also.
18. How we can add two
exchanges with 2MB connectivity? What will be its advantages.
19. Discuss and explain
difference between IP exchange and SPC exchange.
20. Discussed feature of ISDN
with block diagram?
OFC
1. Explain the function of an
OLTE in Optic-Fiber-System?
2. What are the advantages of
Optic fiber cable over the conventional cable system?
3. How STM is more useful in
SDH system over PDH system.
4. How monomode fiber is
advantageous for communication network rather than multichrome.
5. How dispersion is reduced in
graded index fiber.
6. Discuss the merits &
demerits of SDH?
7. What may be the reasons of
alarm in OFC communication system?
8. Discuss the difference
between PDH & SDH system? Also advantages of SDH over PDH system.
9. Explain different network
Topologies & basic, requirement of topologies?
10. Write down in what ways
transmission & reception occurs in OFC. How OFC can
be optimum utilized in Indian
Railways. How we can expand uses of OFC in Commercial ways.
11. What are test conducted in
OFC?
12. How we can patch from OFC
to conventional cable?
13.
What is RDSO specification of OFC Cable.
14. Detail the works of
Railtel? How this body is advantageous for Railways.
RAILNET
1. What is LAN? What is the
difference between internet & intranet, and which can be categorized under
LAN?
2. What do you meaning of LAN,
WAN, MAN & VLAN?
3. What is the function of
Router?
4. How networking in our
Railway has been done? Discuss its benefits & procedures for Internet
Connectivity.
5. Discuss different network
topologies? Give explanation diagram for each?
6. How to connect 10 nodes (PC)
in network. Explain with diagrams, detailing equipments needed.
7. Explain different network
Topologies. Also explain requirement of individual topologies with diagrams?
8. What is Router? What types
of ports are available in Router?
9. Explain the functions of
switch? Also detail the advantages of switch over HUB?
10. What is VPN? How it will be
useful in a corporate network?
11. What is Layer 3 switch?
12. What is synchronous &
asynchronous communication?
13. What is the use of NMS to
monitor and control the problems in Railnet?
14. Detail the differences
between OSI & ISO layer?
15. Differentiate between L-3
switch and Router?
16. Difference between Hub and
switch with diagrams?
17. What do you mean by NMS?
18. What is the permissible
length between switch to switch via CAT-5/6 cable?
19.
What is TCP/IP and UDP?
20. Why OFC cable is used in
LAN? What are it‟s advantages?
21. Give details of AFRES,
MMIS, and PRIME?
22. Why VLAN used? What are the
advantages of VLAN configuration over the normal configuration?
23. Give full form of SNMP.
Detail its basics and why it is used?
24. What is the meaning of MAC
?
25. What is IP address? Also
give details of four sections of it.
26. Explain OSI seven layer
model?
27. What is synchronous and
asynchronous communication?
28. What type of mail server is
being used in our Railway?
29. What are the minimum number
of ports in a Router?
30. What theory used in LAN, is
it Multicast, Unicast or Broadcast?
31. What is RAS and what are it‟s
functions??
32. What is proxy server? Why
Proxy server is being used in SEC Railway?
33. What do you mean by MPLS?
Where it is used?
34. For testing one Hop
distance which command are used?
35. How many types of modem are
used for network? Specify for permanent & dialup types?
36. What do you mean about
Firewall?
37. Why NetBIOS protocols are
used?
38. In Railway which type of
architecture are used for MIS?
39. List the differences
between ROM & RAM?
40. What Operating and
application software are used in client and server side in Railways for MIS
application?
41. What do you mean by UTP
CAT5/6 cables?
42. What is Hop distance?
43. For route checking which
command are used in command mode?
44. What do you mean about IDS,
IPS in security?
45. Which technology used for
wireless data communication between two PCs. or Mobile to PC?
46. Bandwidth for STM-1 &
E-2 steam?
47. MAC address is which Layer
address in OSI Layer?
48. What are the terms
indicated by subnet mask ?
49. Give an example of IP
address, subnet mask and gateway of router with simple example?
50. Draw a block diagram of
SECR Railnet with all network devices and servers and explain each network
devices in brief. (Including R & NGP)
51.
Give short notes on:
· VOIP
· URL
· NIC
· CSMA/CD
· Frame
· Packet
FOIS
1. How do we connect FOIS
network between two stations. Explain with block diagram.
2. What are the advantages we
are getting from FOIS? Explain fourth point of public
& Railways.
3. Explain with block diagram
the connectivity of FOIS between Divisions to HQ iSECR.
PASSENGER AMENETIES
1. Discuss how Touch & Feel
system works in Railway. What are items included in it?
2. Discuss unification of PRS
& UTS. What are the advantages of it?
3. Discuss how IVRS, video
conferencing, Call Centre, Train Charting/Voice Recorder works.
4. Draw a block diagram of PRS
at a way side station?
5. Write down the working
principle of Coach Guidance System and Train indication board?
Interaction with other
public agencies
Give short notes on:
(i) SACFA
(ii) PTCC
(iii) WPC
Write short notes: -
a. Wave Guide
b. Space Diversity
c. Fade Margins
d. Frequency Diversity
e. Railnet
f. FOIS
g. OTDR
h. NTES
i. IVRS
j. DTMF Signaling
k. ISDN
l. LAN
m. WAN
n. FOIS
o. MODEM
p. LAN Extender
q. Router
r. Voice Data Logger
s. NMS
t. PRC
u.
CCB Telephone
v. Q signaling
w. Jitter & Wander
x. PDH
y. SDH
z. Leased line
aa. BRI
bb. PRI
cc. TDM
dd. PCM
CUG scheme Objective type
questions
(i) Write full forms of the
following
i. CEPT card
ii. ISDN
iii. SMPS
iv. MTBF
v. OTDR
vi. SCADA
vii. ACSR
viii. OLTE
ix. MODEM
x. NMS
xi. UTS
xii. PIJP
xiii. DTMF
xiv. BON
xv. GSM
xvi. CRIS
xvii. FOIS
xviii. SPC
xix. DTMS
xx. COIS
xxi. AMI
xxii. HDB-3
xxiii. TDM
xxiv. RMS
xxv. STM
xxvi. LAN
xxvii. WAN
xxviii. PCM
xxix. GRIM
xxx. CUG
xxxi.
TDM
xxxii. NMS
(ii) Write True/False of the
following:-
1. In OFC Cable Repeater, Index
of Core is kept higher than clad. (For Total Internal
Reflection) (T/F)
2. OTDR can be used to measure
the Splice loss also in OFC-(T/F)
3. Inmarset works via satellite
and any access to Private Network is not required- (T/F)
4. In (PRS+UTS) unified system
UTS counter can issue a Reserved Ticket-
(T/F).
5. For Radio Patching working
of CNL cuts. It is necessary to convert 4W.CKT
into 2W before patching.-
(T/F).
6. With MLLN of CNL cuts, it is
necessary to convert 4W CKT into 2W before patching-
(T/F).
7. In DTMF dialing always two
different frequencies are transmitted (T/F).
8. 1 Watt is equal to 30 dbm.
(T/F)
9. 672 MB are provided in STM-I
(T/F)
10. OTDR is used in Digital MW.
(T/F).
11. WAN can be provided in closed
premises. (T/F).
12. In TDM, the transmission of
signal is on time sharing basis. (T/F)
13. In SPC Exchange, the
switching network set up temporary connection between two are more exchanges.
(T/F)
14. LAN Extender can be used
for WAN connectivity (T/F).
15. Specification of OFC Cable
is IRSTC-55(T/F).
(iii) Fill in the blanks.
1. The duration of a multiframe
is ………..
2. In a 30 channel system, the
sampling time period is………….
3. In 30 cahnnel PCM system, a
time slot duration is …………. microsecond.
4. STM 4 is having
-----------2Mb
5. In data circuit, Data
transfer limit in CAT-6 cable is ---------
6. Channel transmission
capacity of STM-1 is --------------
7. Bit rate of 2Mb with
--------------------- PPM tolerance.
8. Bit rate of 2nd order mux
----------------- Kbps ---------------- PPM tolerance.
9. Duration of frame
-------------------
10. Duration of Time slot
-------------------
11. What does EPABX stand for
----------------------------------
12. Analog Subscriber loop
resistance ------------------------ Ohm.
13. Working voltage of
electronic exchange ----------------- V -----------------
tolerance.
14. Ideal working Temperature
of exchange ---------------------
15. Dial tone ------------------
Hz modulated with ----------------- Hz frequency.
16. Ring back tone
------------------ Hz modulated with ------------------ Hz frequency.
17. Busy tone
------------------- Hz modulated with --------------- Hz frequency.
18. Switch is a ------------------
device (Broadcasting/Unicasting).
19. Switch function on the
principle of ------------------ (CSMA/CDMA).
20. Insertion loss of Telephone
equipment in the case of: -
·
Handset is on the -----/switch/Nil
· Handset is off the
-----/switch/0.2db
· Press to -------“button
pressed/3.0db
QUESTION BANK FOR THE
SELECTION OF JE-I(SIGNAL) TO
SE(SIGNAL)
(Objective/True-False and
short Questions)
1 Operating Current of coil
of indicator in DLBI is about:-
i) 40 – 50 mA ii) 95-100mA
iii) 17-25 mA iv) 37-42 mA
2 Rated current and coil
resistance of a polarized relay is:-
i) 100 mA & 100 Ohm ii) 33
mA & 25 Ohm
iii) 25 mA & 77 Ohm iv) 125
mA & 77 Ohm
3 L-Type of transformers are
used:-
i) Where Signals lamps are
directly fed up to 605 Mtr.
ii) Where LED Signals lamps are
used.
iii) Where Signals lamps are
directly fed up to 240 Mtr
iv) Where Signals lamps are
directly fed beyond 1000 Mtr
4 Rating of SL-35B triple
pole lamps is :-
i) 12 V/24W,24W ii) 12V/24W,18W
iii) 24 V/24W,24W iv)
24V/12W,12W
5 The No. of front and back
contacts in QTA2 relay is:-
i) 1F/1B ii) 2F/1B
iii) 1F/2B iv) 2F/2B
6 Minimum permissible TSR
with concrete sleeper track circuits in RE area is:-
i) 2.5Ω/KM ii) 0.6 Ω /KM
iii) 0.25Ω/KM iv) 0.5 Ω /K
7 QS3 DC neutral Relays are
used in :-
i) All circuits of non RE
section
ii) Only internal circuits of
RE area
iii) In axle counter in place
of self type relay
iv) Point machine controlling
RE area
8 QJ1 DC neutral Relays are
used in :-
i) All circuits of non RE
section
ii) For timing control
iii) In axle counter in place
of self type relay
iv) Point machine controlling
RE area
9 Lamp proving relays are :-
i) Current sensing DC line
relays
ii) Voltage sensing DC line
relays
iii) Current sensing DC track
relays
iv) Voltage sensing DC track
relays
10 Rated Voltage and Power
of an AC LED signal is :-
i)
230V, 15W ii) 110V, 50W
iii) 110 V, 15W iv) 230V, 50W
11 In DLBI Commutator handle
gets locked when it is turned :-
i) From Line Close to Line
Clear
ii) From Line Clear to Line
Closed
iii) From Line Closed to train
on Line
iv) Line Clear to Train on Line
12 ALSR Relay is used for :-
i) Sequential route release ii)
Sectional Route release
iii) Route Locking iv) Dead
approach locking
13 EUYNR is: -
i) Emergency route cancellation
relay
ii) Emergency group signal
cancellation Relay
iii) Emergency route
cancellation button relay
iv) 120 second time delay relay
14 Commissioner of Railway
Safety (CRS) belongs to the ministry of:-
i) Railways ii) Civil Aviation
iii) Surface Transportation iv)
Labour
15 Refresher course of
signal supervisors is required once in:-
i) 3 Year s ii) 5 Years
iii) 4 Years iv) 6 Years
16 Number of aspects in the
Inner Distant signal of an IBS signal in Double Distant signalling territory
is:-
i) 3 ii) 2
iii) 4 iv) Same as those of its
Distant Signal
17 Longitudinal bonding is
provided by:
i) Engineering Department
ii) Electrical department
17
iii) S&T department
iv) Combined with ii &iii
18 Induced voltage in
unscreened cable for double line is
i) 116 V/Km
ii) 95 V/Km
iii) 87.5 V/Km.
iv) 78.5V/Km
19 Maximum length of direct
feeding for screened and unscreened cables respectively is
i) 890 m and 980 m
ii) 345m and 543m
iii) 600m and 240m
iv) 640m and 200m
20 IRS type high thrust point machine can operate safely with maximum
contact test load of…..kg on the throw bar
i) 670
ii) 700
iii) 730
iv) 760
21 Stroke of IRS type point
machine is
i) 143 mm
ii) 220 mm
iii) Both i and ii
iv) Stroke can be adjusted
between 110 mm to 220 mm
22 No. of throw rod,
detection rod and lock rod in IRS type point machine are
i) 1, 2 and 2
ii) 2,1 and 2
iii) 2, 2 and 1
iv) 2,2 and 2
23 Study the following
statement about testing of Glued Joints
A) In dry condition resistance of glued joint shall be
less than 25
Mega ohm when meggering voltage
of 100 V DC is applied
across the joint
B) In wet condition resistance of glued joint shall not
be less than3
Kilo ohm when meggering voltage
of 100 V DC is applied across
the joint.
Which of these statements are
true?
18
i) Both A & B
ii) Only A
iii) Only B
iv) None of A & B
24 Study the following
statement
A) For track Circuits lengths up to 700 m, Maximum
permissible rail resistance is 2 Ohm/Km
B) For track Circuits lengths more 700 m, Maximum
permissible rail resistance is 0.5 Ohm/Km.
Which of these statements are
true
i) Both A & B
ii) Only A
iii) Only B
iv) None of A & B
25 Study the following
A) Rail resistance = (Voltage Drop in Rails)/ Average
track circuit current
B) Ballast Resistance = (Average rail Voltage)/Leakage
Current
Which of these statements are
correct?
i)
Both A & B
ii) Only A
iii) Only B
iv) None of A & B
26 Study the following
statement
A) For safe working of track Circuits, without a shunt
across the track, track relay excitation shall not exceed 250% of its pick up
valve.
B) With normal feed source voltage and minimum
permissible ballast resistance of th track, Track relay voltage shall be less
than125 % of its pick up valve.
Which of these statements are
true?
i) Both A & B
ii) Only A
iii) Only B
iv) None of A & B
27 Study the following
statement
A) In DLBI block bell has separate line wire.
19
B) In DLBI Top indicator needle of station in advance is
connected to bottom indicator needle of station sending train.
i) Both A & B are correct
ii) Only A is correct
iii) Only B is correct
iv) None of A & B are
incorrect
28 Study the following
statement
A) In DLBI, Commutator handle should locked first before
the
“Train on line” indication
appears on the indication when the handle
is turned from “Line Clear” to
“Train on line” position.
B) If turning of Commutator is done quickly, a situation
may arise when TOL contacts are made but the Commutator is not locked in
TOL position.
i) Both A & B are correct
and B is correct explanation of A.
ii) Both A & B are correct
and B is not correct explanation of A
iii) Only A is correct.
iv) Only B is correct.
29 Study the following
statement
A) A transverse Rail Bond is provided connecting all the
noninsulated rails.
B) This provides continuous return path to traction
current.
i) Both A & B are correct
and B is correct explanation of A.
ii) Both A & B are correct
and B is not correct explanation of A
iii) Only A is correct.
iv) Only B is correct.
30 Study the following
statement
Transverse Bond is provided by ………
department and identification
of non-insulated rail is done
by……….department.
i)
S&T, Electrical
ii) S&T, S&T
iii) Electrical, S&T
iv) Electrical, Electrical
31 Study the following
statement
A) In double cutting arrangement, proving of control
contacts is done on either limb of HR coil.
B) This prevents false energisation of HR from multiple
faults.
i) Both A & B are correct
and B is correct explanation of A.
ii) Both A & B are correct
and B is not correct explanation of A
iii) Only A is correct.
20
iv) Only B is correct.
32 EI & PI are provided
for stations having no. of routes….. and …… respectively.
i) 0-25, 25-200
ii) 70-100, 20-35
iii) 50-200, 0-50
iv) 5-100, 100-200
33 Track crossings of
signalling cables are done at a depth of 1meter below ……….
i) Ballast Level
ii) Top Level of Rail
iii) Bottom Level of Sleeper
iv) Bottom Level of Rail
34.M/s CEL is one of the
manufacturers for:
a. Analog Axle Counters only
b. Integrated Power Supply
c. Electronic Interlocking
Equipment
d. Both Analog and Digital Axle
Counters
35.For Mechanical Signal
Items, who does the inspection of materials?
a. RDSO
b. RITES
c. Consignee
d. None of the above.
36.The “Outlying Siding” is
referred to the siding for which:
a. The siding line takes off
from running lines and the siding
is located out side of that
station.
b. The siding line takes off
from running lines and is located
in side of that station.
c. The siding line takes off
from running lines and located
between block stations.
d. An additional line is
provided for this purpose in any
station.
37.CRS’s sanction is not
required for the following work in the existing yard?
a.
Replacing mechanical operation of a point with motor
operation
b. Inserting a turnout on
passenger running line
c. Shifting of a signal from
LHS to RHS.
21
d. Opening of a new line for
public
38.The following is wrong
with respect to track repeater relay (TPR)?
a. It has 12 Front /4 Back
contacts
b. It is of QNA1 type
c. It has got AC immunity
against induced voltages
d. It is an example of track
relay
39.The power supply Track
Circuits are taken through which of the following components/modules of the
IPS?
a. Rectifier
b. DC-DC converter
c. Inverter
d. Transformer
40.Choose the correct option
for Digital Axle Counters presently being used in SEC Railway
a. It has both “Preparatory”
and “Hard” Resetting options
b. It doesn‟t require trolley
suppression track circuit
c. It can detect more than one
section
d. It uses only Two conductors
for establishing communication between the pair of EJBs
41.Block Bell Equipment is
used for
a. Converting AC line voltage
coming from the Block instrument at other end of station to required DC voltage
in local Block instrument
b. Converting high AC line
voltage coming from the Block instrument at other end of station to a required
low AC voltage in local Block instrument
c. Converting high DC line
voltage coming from the Block instrument at other end of station to a required
low DC voltage in local Block instrument
d. Converting DC line voltage
coming from the Block instrument at other end of station to required AC voltage
in local Block instrument
42.What is the approximate
maximum distance for Direct Feeding of conventional signal lamps on Double Line
RE area?
a. 180 meters
b. 600 meters
c. 595 meters
d. 220 meters
43.Choose the correct answer
from the following
a. The term “Block Forward” is
concerned with the station lying only in a Single Line section
b. The term “Block Back” is
concerned with the station lying only in a Single Line section
c. The term “Block Back” is
concerned with the station lying either in a Single Line section or a Double
Line section
d.
The term “Block Back” is concerned with the station lying only in a Double Line
section
44.The signal overlap for
IBS signal is
a. 120 meters
b. 180 meters
c. 200 meters
d. 400 meters
45.The Outer and Warner
signals in LQ signalling territory are examples of
a. A permissive and stop
signals respectively
b. A stop and permissive
signals respectively
c. A subsidiary and main
signals respectively
d. Both are subsidiary signals
46.What is the normal aspect
of main signals in Automatic Signalling territory?
a. Yellow
b. Red
c. Green
d. Double Yellow
47.As per the latest policy
of Railway Board, Level Crossing Gate can be interlocked if the TVU of the LC
gate is
a. Up to 20,000
b. Below 25,000
c. Between 15,000 to 20,000
d. More than 25,000
48.Which is correct with
respect to VCOR in signalling installations?
a. This is a special type of
relay used in Digital Axle Counter
b. This is a special type of
relay used to control rectifier
output of an IPS
23
c. This is a special type of
relay used in Electronic
Interlocking
d. This is a special type of
relay used in Siemens RRI
49.The working of an
electrical transformer is based on
a. Mutual Inductance
b. Self Inductance
c. Hall Effect
d. Self Conductance
50 Circuit wiring in PI
installations over SECR is being done with
a. 0.6 mm tinned wire
b. 1.0 mm tinned wire
c. 16/0.2 multi strand copper
wire
d. 1.5 Sq. mm copper wire
51 Fill in the blanks:-
i) For Roding, running under
the track the minimum distance between top of Roding and bottom of rail should
be….
ii) Minimum length of the lock
bar for a broad gauge is……..
iii) Lock bar should have
minimum no. of Clips…….
iv)
The colour of point lever is ……..
v) Resumption of normal working
after overhauling can be done
by SSE / Signal if no. of lever
are not more than ……..
vi) All gates within station
limit are called …gates.
vii) A gate qualifies for
interlocking if the TVU are more than……..
viii) Clearance between road
surface and LC boom should be
between ……to…… Meter.
ix) Far boom locking to be
effective it shall not be possible to lift the boom by …..From close position.
x) Minimum of. …….. % of spare
conductors are to be provided in the main cable up to farthest point zone.
xi) Station section in a “C‟
class station is from ……to ………
xii) Specification of self
regulatory battery charger is S………
xiii) A concrete sleeper is
used in track circuited area if it has a minimum resistance of ….Ohms between
insert to insert.
xiv) Minimum cross section of
lead wire for track circuit should be …….mm.
xv) Excitation level of a track
relay will not be less than …….of rated pick up voltage.
xvi) Plug in type of track
relays has to replace after …….years.
xvii) The overhauling period of
DLBI is ……….years.
xviii) For obstruction test of
a point test piece is kept at a ………
distance from the tow of
xix) Fuse of correct capacity
should be of about ……time the rated current in signaling circuit.
xx) The minimum implantation
distance of a colour light signal from the centre of the track should be ………..
xxi) The colour of shunt signal
button on the panel is ………..
xxii) Route setting on the
panel is indicated by…….
xxiii) UYR relay is used for ……….
xxiv) WCR relay is used for………….
xxv) ALSR is used for ……….
xxvi) The value of induced
voltage in unscreened cable in double line section is ……..ohm/Km.
xxvii) The AC immunity of a IRS
point machine is…….Ohm.
xxviii)As per SEM the minimum
visibility of a distance signal in MACLS territory is……..
xxix) The Block Section Limit
Board is located at minimum …..metre from home signal.
xxx) Clamp type direct locks
are desirable for speed above……… Km/Hour.
52. Write full form of :-
(i) SPAD
(ii) CCRS
(iii) RAMS
(iv) ECTS
(v) CTC
(vi) SSDAC
(vii) MSDAC
(viii)
EKT
(ix) REB
(x) TLJB
(xi) MACLS
(xii) OLWR
(xiii) DMTR
(xiv) MTTR
(xv) MTBF
53. Write true or false:-
i) Insulated rail shall be kept
clear of the ballast by 25mm.
ii) Only single rail track
circuit can be provided in 25 KV Ac area.
iii) Rail joint bonds are
maintained by S&T department.
iv) Audio frequency track
circuit does not require glued joints.
v) Diodo token less block
instrument cannot be used in RE area.
vi) 3-Phase point machine is
immune to induced voltage and can be used to any length of parallelism.
vii) Direct feeding of AC LED
signals is permitted up to 2 Kms.
viii) All external circuit
requires cross protection arrangement.
ix) When SM key is out no
operation can be done from the panel.
x) Calling- on signal button is
of red colour with white dot.
xi) Implantation distance is
painted in red colour on signal post if distance is more than 2.36 metre.
xii) Shelf type line relays are
overhauled on after every 15 year.
xiii) CRS approval is required
for locating a signal on right side.
xiv) For solid rodding the
minimum unsupported length is 1.8 metres.
xv) Green notice is issued by
traffic department.
xvi) The type of turn out is
specified in Interlocking plan.
xvii) Calling- on signal
detects all the points in routes and overlap.
xviii) After two months of
commissioniong responsibility of maintaining Signalling gears in station lies
on open line even if station is not handed over to open line.
xix) Interlocking of a L. C.
gates requires sanction of CRS.
xx) QSPA1 relay is used as
repeater of TR.
xxi) Authority to proceed means
authority to enter in block ection.
xxii) Station limit and station
section means same thing.
xxiii) Class “D” stations are
non interlocked.
xxiv) Double yellow aspect
means caution.
xxv) A depended shunt signal
has no ON aspect.
xxvi) In automatic signaling
letter “A” in white on black circular disc is provided.
xxvii) Absolute block system is
most prevalent system of block working.
xxviii)Driver can pass an
Automatic signal in red without any authority.
xxix) Caution board is provided
at 400 metre away from speed indicator board.
xxx) Grease/petroleum jelly can
be provided on secondary battery terminals to prevent corrosion.
xxxi) The LED ECR used in ON
aspect can also be used for route aspect.
xxxii)
SL-21 signal lamps have two filaments of equal rating.
xxxiii)The maximum length of
track circuit in RE area using PSC sleeper is 350 metres.
xxxiv)Force drop arrangement is
provided in EKT.
xxxv)
Calling –on signal is of lunar white colour .....
