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RRB JOBS QUESTION BANK : JUNIOR ENGINEER (NON-AC) SELECT THE CORRECT ANSWERS
QUESTION BANK FOR SELECTION TO THE POST OF JUNIOR ENGINEER (NON-AC)
Part – A (TRAIN LIGHTING)
I. SELECT THE CORRECT ANSWER:
1) In regulator how many windings are available in Magnetic amplifier ( a & c )
a. 6 c. 4
b. 3 d. 5
2) Size of V belts used 4.5KW Alternator ( c )
a. C121 c. C122
b. C123 d. C124
3) Capacity of battery fuse in TL Coaches ( a )
a. 35 A (HRC ) c. 16 A (HRC )
b. 63 A (HRC ) d. 5 A (HRC )
4) 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
5) What are the AH capacity of cells used in TL coaches ( c )
a. 110 c. 120
b. 1100 d. 800
6) Name the Acid used in lead acid cells ( a )
a. Sulphuric Acid c. Nitric acid
b. Hydrochloric Acid d. Phosphoric Acid
7) Give the Spg & Voltage of Fully charged cells ( a )
a. 1220 & 2.2 a. 1200 & 2.2
b. 1220 & 2.1 b. 1200 & 2.1
8) Cut in speed for B/L alternator in TL application ( c )
a. 21 c. 19
b. 20 d. 18
9) Inverter converts ( a )
a. DC to AC c. AC to AC
b. DC to DC d. AC to DC
10) IGBT are used as ( a )
|
a. High frequency switching device b. Illuminating device |
c. d. |
Low frequency switching device Amplifier |
|
|
11) |
Boost charge of VRLA cells a. 2.3 V/Cell |
c. |
( a ) 2.25 V/Cell |
|
12) |
b. 110 V/Cell Trickle charging of VRLA cell a. 2.3 V/Cell |
d.
c. |
115 V/Cell ( c ) 2.25 V/Cell |
|
13) |
b. 110 V/Cell No of MA’s in 4.5 KW regulators a. 1 |
d.
c. |
115 V/Cell ( a ) 2 |
|
|
b. 3 |
d. |
4 |
|
14) |
No of ET in 4.5 KW regulators a. 1 |
c. |
( a ) 2 |
|
15) |
b. 3 Rectifier converts |
d. |
4 ( b ) |
|
a. |
DC to AC |
c. |
AC to AC |
|
b. |
AC to DC |
d. |
DC to DC |
16) Give the half load setting of R/R for TL application ( a )
a. 19 Amps c. 21 Amps
b. 20 Amps d. 22 Amps
17) Required level of Illumination for Ordinary sleeper coach ( c )
a. 14 Lux c. 20 Lux
b. 22 Lux d. 16 Lux
18) Give the tension length of spring used in Tension rod of 4.5 KW Alternator ( a )
a. 310 mm c. 269 mm
b 265 mm d. 275 mm
19) Why lead acid cells are called as Secondary cells ( c )
a. Since it can’t be recharge c. Since it can be recharge
b. Since it can’t charge initially d. None
20) 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
21) Voltage setting in VRLA cells for Express & passenger trains is ( c )
a. 128 ± 0.5V & 127 ± 0.5V c. 127 ± 0.5V & 128 ± 0.5V
b. 125 ± 0.5V & 125 ± 0.5V d. 124 ± 0.5V & 122 ± 0.5V
22) If alternator is not generating voltage, the reason would be ( d )
a. Field may be open c. Dropping of V-belts
b. Fuse in regulator had blown d. All the above
23) The size of bus bars recommended to use in 4.5KW ERRU is ( b )
a. 90 Sq. mm c. 50 Sq. mm
b. 16 Sq. mm d. None
24) Terminals of IGBT are ( b )
a. Base, emitter, collector c. Gate, source, drain
b. Gate, emitter, collector d. None
25) No. of zeners connected across the primary of the step down transformer of power module. ( a )
|
a. |
4 |
c. |
2 |
|
b. |
3 |
d. |
1 |
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