RRB JOBS QUESTION BANK : JUNIOR ENGINEER (NON-AC) ESSAY ANSWER TYPE QUESTIONS
QUESTION BANK FOR SELECTION TO THE POST OF JUNIOR ENGINEER (NON-AC)
Part – A (TRAIN LIGHTING)
ESSAY ANSWER TYPE QUESTIONS :
1) List items to be checked in trip inspection of TL coaches?
Ans:
i. Feel alternator temperature for generation. Warm- Generation OK, Cool- Check for generation.
ii. Replace field fuse if found blown
iii. Check continuity of field & phase windings with the help of test lamp/multimeter.
iv. Checks for residual magnetism, in case of loss of magnetism provide 12V flash.
v. Check for continuity between alternator and regulator.
vi. Check the condition of safety chain and availability of split pins in safety chains
vii. Check the alternator suspension bracket and tension gear for damages and replace if any.
viii. Check for availability of alternator castle nut.
ix. Check for availability of all V-belts and without and twist.
x. Check the V- belt tension with the help of 4 Kg weight and adjust accordingly.
xi. Ensure 30mm gap between bracket and free end bush collar
xii. Check for any shift of axle pulley, the gap between axle pulley and wheel hub.
xiii. Check for level of distilled water in lead acid cells and top-up if required.
xiv. Clean sulphation if any.
xv. Ensure HRC fuse of correct rating & in working condition.
xvi. Check for any earth leakages and take remedial action.
xvii. Check for tightness in terminal connections
xviii. Check for availability of cable cleats, clamps, and grommets for all cables.
xix. Check and replace any equipment.
2) List items to be checked in monthly inspection of TL coaches?
Ans: In addition to trip schedule the following examinations to be carried out
i. Check for tightness of terminal connections of alternators.
ii. Thoroughly clean externally
iii. Open Inspection cover of regulator and blow off dust with the help of blower.
iv. Check locking of current settings in the regulator
v. Check for availability and proper fixture of castle nut and split pin.
vi. Record Specific gravity of each mono block on On load and Off load.
vii. Charge the cells through BCT until the specific gravity raises to value of Pilot cell.
viii. In case 1/3rd of total cells are with low specific gravity, the entire set to be replaced
ix. Cells showing reverse/ zero volts should be withdrawn and replaced by charged cells.
In addition to the works mentioned in Trip & Fortnightly Examination, carry out the following.
Alternators, Rectifier & Regulators:
a) Check for tightening of terminal connections of alternators and rectifier regulators.
b) Thoroughly clean externally the alternator & regulator.
c) Open inspection cover of regulator. Blow dust with a portable blower. Secure cover tightly after inspection.
d) Check locking of current setting of regulator, if disturbed it should be reset/locked as prescribed.
e) Check the alternator pulley for proper fixture and the availability of castle nut & split pin.
Axle pulley:
Watch for shifting of axle pulley by observing the white band on either side of pulley. Reset the correct position of pulley, if found shifted and tighten the loose nuts with torque wrench with
Study Kit for Railway Recruitment Board (RRB) Exams
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