Railway Maintenance Tools and Equipment

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Questions and Answers

How many hose clips are required for thermit welding?

4 Nos. (correct)
2 Nos.
8 Nos.
6 Nos.

What is the size of the rail file mentioned in the content?

350 × 30 × 6 mm
350 × 40 × 6 mm (correct)
350 × 60 × 6 mm
350 × 50 × 6 mm

What is the purpose of the insulation hood for control cooling?

For 110 UTS rail welding (correct)
For grinding
For crucible lining
For welding

How many rail profile guided grinding trolleys are required?

1 No. (B) Signup and view all the answers

What is the expected life of the weld trimmer (cutter)?

100 (B) Signup and view all the answers

What should always be available for crucible lining?

Magnesite powder and sodium silicate (A) Signup and view all the answers

On what basis should the equipment be replaced if the expected life is not given?

Condition basis (B) Signup and view all the answers

What should be followed as per the approved AT welding technique?

Critical process timing (C) Signup and view all the answers

What is the purpose of providing SEJs at either end of a stretch of track?

To isolate the stretch of track from the remaining portion of LWR/CWR (D) Signup and view all the answers

What is the primary requirement before laying LWR/CWR?

Completing all preliminary works (A) Signup and view all the answers

What is the purpose of a detailed plan in LWR/CWR?

To show the exact locations of various features mentioned in the content (B) Signup and view all the answers

What is the typical scale of a detailed plan for LWR/CWR?

1:5000 (D) Signup and view all the answers

How many rail pieces are required for laying one LWR?

Four (D) Signup and view all the answers

What is the purpose of fishplates in LWR/CWR?

To connect rail pieces together (A) Signup and view all the answers

What is the purpose of rail closures in LWR/CWR?

To fill gaps in the track (B) Signup and view all the answers

What is the purpose of de-stressing equipment in LWR/CWR?

To release stresses in the rails (A) Signup and view all the answers

What is the primary cause of buckling of track?

High compressive forces in the rails (C) Signup and view all the answers

What is a sign of a track being subjected to undue strain?

Jammed rail joints (C) Signup and view all the answers

When should operations that impair lateral resistance be avoided?

During hot weather (A) Signup and view all the answers

What is the purpose of a joint gap survey?

To adjust joint gaps before hot weather (A) Signup and view all the answers

Why is it important to lubricate rail joints?

To prevent buckling of track (A) Signup and view all the answers

What is the result of inadequate expansion gaps in the track?

High compressive forces in the rail (B) Signup and view all the answers

What can cause impairing of lateral resistance in the track?

Inadequate ballast and deep screening (C) Signup and view all the answers

When should the greasing of fishplates be done?

Before the onset of hot weather (B) Signup and view all the answers

What should be removed before welding on an LWR?

Fastenings for 20 m on each end (B) Signup and view all the answers

What is the purpose of creating a gap of 1 m at location 'B'?

To allow for free movement of rail (B) Signup and view all the answers

What determines the anchor length 'la'?

The lowest value of tp (A) Signup and view all the answers

Why should the anchor length be increased?

Based on the condition of the fastenings, rubber pads, liners or ballast (D) Signup and view all the answers

What is the purpose of marking distances W0 W1, etc.?

To track the progress of de-stressing (C) Signup and view all the answers

What happens when tP is less than the desired to?

The de-stressing operation begins (D) Signup and view all the answers

What is done to the portion from A2 C2 during de-stressing?

It is unfastened and mounted on rollers (A) Signup and view all the answers

What is the purpose of de-stressing?

To allow free movement of rail (C) Signup and view all the answers

Who is responsible for performing detailed calculations to ascertain the effect of LWR on bridges with ballasted deck?

Design office of Chief Bridge Engineer (C) Signup and view all the answers

What is the condition for permitting LWR/CWR on bridges with ballasted deck?

Based on detailed calculations (A) Signup and view all the answers

What type of fastenings are required for bridges with un-ballasted deck?

Rail-free fastenings (B) Signup and view all the answers

What is the maximum length of the bridge that does not exceed the stipulations in Table-1?

30.5 meters (A) Signup and view all the answers

What is the purpose of providing PRC sleepers with elastic rail clips on the approach track?

To arrest creep (D) Signup and view all the answers

What is the location of the SEJ of the LWR in relation to the bridge?

Such that the bridge does not fall in the breathing length of the LWR (D) Signup and view all the answers

What is the condition for the ballast section of the approach track?

It should be well-compacted and consolidated during the months of extreme summer and winter (B) Signup and view all the answers

What is the length of the approach track that should be well-anchored by providing PRC sleepers with elastic rail clips?

50 meters (D) Signup and view all the answers

Study Notes

Thermit Welding Team Equipment

Hose clips: 4 Nos.
Pliers: 1 No.
Rail file: 350 × 40 × 6 mm (For Emergency use only), 4 Nos.
Weld trimmer (Cutter): 1 No.
Insulation hood for control cooling: 1 No.
Rail profile guided grinding trolley (Grinding wheel): 1 No.
Protective clothing, shoes gear, and Leather gloves: must be available to ensure quality.

Composition of Thermit Welding Team

The team should have specific equipment, including compressor tank-wise, depending on the requirement.

Laying Long Welded Rails (LWR)

Materials required: • 4 metre or longer rail pieces of the same rail section as LWR • 2 sets of SEJs with sleepers and fastenings • Adequate numbers of 1 metre long fishplates with special screw clamps/joggled fishplates with slotted grooves and bolted clamps • Rail closures of suitable sizes • 1 metre and 10 cm straight edges • Callipers and feeler gauges (2 mm to 0.1 mm) • Rail cutting equipment • De-stressing equipment

Buckling of Track

Buckling occurs when high compressive forces are created in the rails due to inadequacy of lateral resistance in the track.
Conditions that induce buckling: • Inadequate expansion gaps • Failure to counteract creep in time • Non-lubrication of rail joints
Precautions against buckling: • Avoid operations that impair lateral resistance during high rail temperatures • Grease fishplates before hot weather • Adjust joint gaps in SWR and free rail track before hot weather

Bridges with Ballasted Deck (with bearing)

Detailed calculations are required by the Design office to ascertain the effect of LWR on bridges and their sub-structure.
LWR/CWR may be permitted on a case-to-case basis based on calculations.

Bridges with Un-Ballasted Deck

LWR/CWR shall be continued over bridges with specific overall lengths and conditions.

De-stressing with Rail Tensors

Procedure for de-stressing of LWR with rail tensor: • De-stress in parts if LWR is longer than manageable lengths • Remove impediments to free movement of rail • Create a gap of 1 m at the centre of the first segment of the LWR • Mark anchor length and transfer marks onto the rail foot • De-stress operation shall be carried out when tP is less than the desired to

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Description

This quiz covers the tools and equipment required for railway maintenance, including hose clips, pliers, rail files, and more.