Organisation : South Central Railway
Post : Junior Engineer AC Electrical GS
Document Type : Question Bank
Website : scr.indianrailways.gov.in
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/RRB/7173-1336372767757-06-12-11%20Question%20bank%20for%20JEE%20AC.pdf
SCR AC Electrical GS Sample Question Paper
Question Bank With Answers For Jee – II Exams (Ac Cadre) Index :
Question Bank For Selection To The Post Of Junior Engineer (AC)
GRADE – II IN PB: Rs. 9300 – Rs. 34800 WITH GRADE PAY Rs. 4200/-
Against Ldce Quota In Electrical (Gs) Department On Sc Division.
Related : South Central Railway Junior Electrical Engineer Question Bank : www.pdfquestion.in/7177.html
SELECT THE CORRECT ANSWER:
1) Size of V belts used for 25KW Alternator ( c )
a. C121 c. C122
b. C123 d. C124
2) Capacity of battery fuse in AC Coaches ( a )
a. 315 A & 400 (HRC ) c. 16 A (HRC )
b. 63 A (HRC ) d. 5 A (HRC )
3) The gap between the two halves of axle pulley should be ( c )
a 0.5 – 1.0 mm c. 3.0 – 4.0 mm
b. 2.0 – 3.0 mm d. 5.0 – 5.5 mm
4) What are the AH capacity of cells used in all types of AC coaches ( b )
a. 800 Ah Lead Acid & 1100 Ah VRLA
c. 1100 Ah
b. 800 & 1100 Ah Lead Acid & 1100 Ah VRLA
d. 800 Ah
5) Name the Acid used in lead acid cells ( a )
a. Sulphuric Acid c. Nitric acid
b. Hydrochloric Acid d. Phosphoric Acid
6) The Specific gravity & Voltage of fully charged cells are ( a )
a. 1220 & 2.2 a. 1200 & 2.2
b. 1220 & 2.1 b. 1200 & 2.1
7) Cut in speed for brushless alternator in AC application ( b )
a. 21 c. 19
b. 20 d. 18
8) Inverter converts ( a )
a. DC to AC c. AC to AC
b. DC to DC d. AC to DC
9) IGBT are used as ( a )
a. High frequency switching device
c. Low frequency switching device
b. Illuminating device d. Amplifier
10) Boost charge of VRLA cells is ( a )
a. 2.3 V/Cell c. 2.25 V/Cell
b. 110 V/Cell d. 115 V/Cell
11) Trickle charging of VRLA cells is ( c )
a. 2.3 V/Cell c. 2.25 V/Cell
b. 110 V/Cell d. 115 V/Cell
12) Rectifier converts ( b )
a. DC to AC c. AC to AC
b. AC to DC d. DC to DC
13) Give the half load setting of RRU for AC application at 1500 rpm ( a )
a. 97 Amps c. 21 Amps
b. 20 Amps d. 22 Amps
14) Required level of Illumination in corridor of 2-Tier AC coach is ( c )
a. 14 Lux c. 40 Lux
b. 22 Lux d. 16 Lux
15) Give the minimum tension length of spring used in Tension rod of 25 KW Alternator ( b )
a. 310 mm c. 269 mm
b 265 mm d. 275 mm
16) Why lead acid cells are called as secondary cells ( c )
a. Since it can’t be recharge c. Since it can be recharged
b. Since it can’t charge initially d. None
17) Name the method to be used to find out Earth leakage ( a )
a. Double test lamp method c. Tong tester method
b. Multi meter method d. Volt meter method
18) If alternator is not generating voltage, the reason could be ( d )
a. Field may be open c. Dropping of V-belts
b. Fuse in regulator had blown d. All the above
19) The advantage of ERRU is ( d )
a. To obtain pure DC supply c. Produces over voltage
b. Inbuilt Over Voltage
protection d. Both (a) & (b)
20) The capacity of Regulators used in AC coaches are ( a )
a. 18KW & 25KW c. 4.5KW & 25KW
b. 4.5KW & 15KW d. 4.5KW & 18KW
I. WRITE DOWN THE ABBREVIATIONS :
1 PWM : Pulse Width Modulation.
2 VRLA : Valve Regulated Lead Acid
3 IGBT : Insulated Gate Bi polar Transistor
4 FRPCPY : Failure Rate Percentage Per Year.
5 BTU : British Thermal Unit.
6 IOD : Injured On Duty.
7 LAP : Leave at Average Pay
8 LHAP : Leave at Half Average Pay
9 CL : Casual Leave
10 PNM : Permanent Negotiable Machinery
11 AIRF : All India Railway men federation.
12 NFIR : National Federation of Indian railways.
13 DA : Dearness allowance
14 TA : Traveling allowance or transportation allowance
15 LWP : Leave without pay
16 CCA : City compensatory allowance.
17 PATB :Passenger alarm terminal board
18 EFT : Emergency feeding terminals
19 PELE : Portable emergency lighting equipment
20 IRIEEN : Indian railways institute of electrical engineers
21 PERT : Programme evaluation & review techniques
22 DGS&D :Director General of supply and Disposal
23 EMD :Earnest Money Deposit
24 SD :Security Deposit
25 BG :Bank Guarantee
26 PG : Performance Guarantee
27 CRI : Colour rendering Index
28 EEPROM : Electrically Erasable Programmable Read Only Memory
29 RDSO : Research Design & Specification Organization
30 PPCP : Poly Propylene Co-Polymer