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Questions and Answers
What is the gauge measurement for Broad Gauge (BG)?
What is the gauge measurement for Broad Gauge (BG)?
What is the maximum height of a passenger platform above rail level for Broad Gauge?
What is the maximum height of a passenger platform above rail level for Broad Gauge?
What is the center to center distance of track recommended for Meter Gauge (MG)?
What is the center to center distance of track recommended for Meter Gauge (MG)?
What is the minimum clearance of check rails at level crossings for both gauges?
What is the minimum clearance of check rails at level crossings for both gauges?
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Which slope is used for embankments?
Which slope is used for embankments?
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What is the minimum thickness of a blunt nose?
What is the minimum thickness of a blunt nose?
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What is the maximum throw off switch measurement for Meter Gauge?
What is the maximum throw off switch measurement for Meter Gauge?
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What is the diameter of ballast of track?
What is the diameter of ballast of track?
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What is the difference in gauge measurements that could potentially cause derailments?
What is the difference in gauge measurements that could potentially cause derailments?
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What is the total permissible play between flanges and the running edges of the rail?
What is the total permissible play between flanges and the running edges of the rail?
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What is the length of standard tongue rail for a 1 in 8½ straight for Broad Gauge?
What is the length of standard tongue rail for a 1 in 8½ straight for Broad Gauge?
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How much slackness is required to derail a stock, according to the provided calculations?
How much slackness is required to derail a stock, according to the provided calculations?
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What is the maximum clearance of check rail at turnout for Meter Gauge?
What is the maximum clearance of check rail at turnout for Meter Gauge?
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What is the permissible wear for both flanges calculated based on the flange thickness?
What is the permissible wear for both flanges calculated based on the flange thickness?
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What is the condemning flange limit indicated in the content?
What is the condemning flange limit indicated in the content?
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What thickness does each flange measure in the gauge calculations?
What thickness does each flange measure in the gauge calculations?
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How much slack gauge is deemed insufficient to cause a derailment due to increased lateral oscillations?
How much slack gauge is deemed insufficient to cause a derailment due to increased lateral oscillations?
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What is the width of the tyre referenced in the calculations?
What is the width of the tyre referenced in the calculations?
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What value is used to indicate the permissible slack on a 4 degree curve?
What value is used to indicate the permissible slack on a 4 degree curve?
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What conclusion can be drawn when the gauge slackness is solely considered at 70 mm?
What conclusion can be drawn when the gauge slackness is solely considered at 70 mm?
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What is the minimum center to center distance of track for Broad Gauge (BG)?
What is the minimum center to center distance of track for Broad Gauge (BG)?
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What is the standard length of tongue rail for a 1 in 12 curve for Broad Gauge?
What is the standard length of tongue rail for a 1 in 12 curve for Broad Gauge?
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What is the minimum thickness of a blunt nose for both gauges?
What is the minimum thickness of a blunt nose for both gauges?
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What is the recommended center to center distance of track for Meter Gauge?
What is the recommended center to center distance of track for Meter Gauge?
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What is the minimum clearance of check rails on curves for Meter Gauge?
What is the minimum clearance of check rails on curves for Meter Gauge?
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What is the maximum allowable height of a passenger platform above rail level for Broad Gauge?
What is the maximum allowable height of a passenger platform above rail level for Broad Gauge?
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What is the minimum slope for cutting for both gauges?
What is the minimum slope for cutting for both gauges?
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What is the maximum distance between the centre of track and the face of platform for Broad Gauge?
What is the maximum distance between the centre of track and the face of platform for Broad Gauge?
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What is the calculated difference in gauge that may contribute to derailments?
What is the calculated difference in gauge that may contribute to derailments?
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What is the total permissible play calculated between flanges and the running edges of the rail?
What is the total permissible play calculated between flanges and the running edges of the rail?
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What could be the effect of gauge slackness being less than 70 mm?
What could be the effect of gauge slackness being less than 70 mm?
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What does the condemning flange limit indicate?
What does the condemning flange limit indicate?
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What is the total permissible wear for both flanges calculated from the provided flange thickness?
What is the total permissible wear for both flanges calculated from the provided flange thickness?
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What is the implication of slack within a 4 degree curve based on the calculations?
What is the implication of slack within a 4 degree curve based on the calculations?
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Which calculation focuses on ensuring compliance to avoid derailment?
Which calculation focuses on ensuring compliance to avoid derailment?
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In the event of a wheel dropping, what is the condition under which a derailment could occur?
In the event of a wheel dropping, what is the condition under which a derailment could occur?
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How is the slackness required to derail a stock calculated?
How is the slackness required to derail a stock calculated?
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What thickness is assumed for each flange in the gauge calculations?
What thickness is assumed for each flange in the gauge calculations?
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Which length of standard tongue rail is used for a 1 in 16 curve for Meter Gauge?
Which length of standard tongue rail is used for a 1 in 16 curve for Meter Gauge?
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What is the minimum clearance of check rail on curves for Broad Gauge?
What is the minimum clearance of check rail on curves for Broad Gauge?
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What is the maximum allowable throw off switch measurement for Broad Gauge?
What is the maximum allowable throw off switch measurement for Broad Gauge?
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What is the minimum slope used for cutting for Broad Gauge?
What is the minimum slope used for cutting for Broad Gauge?
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What is the maximum distance between the center of track and the face of platform for Meter Gauge?
What is the maximum distance between the center of track and the face of platform for Meter Gauge?
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What is the standard length of tongue rail for a 1 in 12 straight for Meter Gauge?
What is the standard length of tongue rail for a 1 in 12 straight for Meter Gauge?
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What is the difference between the gauge and the wheel gauge as stated in the calculations?
What is the difference between the gauge and the wheel gauge as stated in the calculations?
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What is the total permissible play that can occur between flanges and the running edges of the rail?
What is the total permissible play that can occur between flanges and the running edges of the rail?
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What thickness is considered as the condemning flange limit?
What thickness is considered as the condemning flange limit?
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Which of the following is the calculated permissible wear for both flanges?
Which of the following is the calculated permissible wear for both flanges?
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What is the play allowed for a 4 degree curve according to the calculations?
What is the play allowed for a 4 degree curve according to the calculations?
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How much slackness is required to potentially derail a stock?
How much slackness is required to potentially derail a stock?
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What is the thickness of both flanges combined?
What is the thickness of both flanges combined?
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What condition may cause increased lateral oscillations that result in derailment?
What condition may cause increased lateral oscillations that result in derailment?
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What is the thickness of the flange as per the calculations?
What is the thickness of the flange as per the calculations?
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What is the formula used to calculate the permissible wear for both flanges?
What is the formula used to calculate the permissible wear for both flanges?
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Study Notes
Standard Dimensions of Permanent Way
-
Gauge:
- Broad Gauge (BG): 1676 mm
- Meter Gauge (MG): 1000 mm
-
Formation Slopes:
- Embankment: 2:1
- Cutting: 1:1
-
Centre to Centre Distance of Track:
- Minimum: 4265 mm (BG), 3660 mm (MG)
- Recommended: 4725 mm (BG), 3960 mm (MG)
-
Length of Rail:
- BG: 13000 mm
- MG: 12000 mm
-
Clearance of Check Rails at Level Crossings:
- Minimum: 51 mm (BG), 51 mm (MG)
- Maximum: 57 mm (BG), 57 mm (MG)
-
Clearance of Check Rail on Curves:
- BG: 44 mm
- MG: 41 mm
-
Distance Between Centre of Track and Face of Platform:
- Maximum: 1680 mm (BG), 1345 mm (MG)
- Minimum: 1670 mm (BG), 1335 mm (MG)
Height of Passenger Platform
- Maximum Height: 840 mm (BG), 405 mm (MG)
- Minimum Height: 760 mm (BG), 305 mm (MG)
Standard Length of Tongue Rail
- 1 in 8½ straight: 4725 mm (BG), 4116 mm (MG)
- 1 in 12: 6400 mm (BG), 5485 mm (MG)
- 1 in 12 Curve: 7730 mm (BG), 6700 mm (MG)
- 1 in 16 curve: 9750 mm (BG), 7420 mm (MG)
Check Rail Clearance at Turnout
- Minimum: 44 mm (BG), 41 mm (MG)
- Maximum: 48 mm (BG), 44 mm (MG)
Throw Off Switch
- Maximum: 115 mm (BG), 100 mm (MG)
- Minimum: 95 mm (BG), 89 mm (MG)
Minimum Thickness of Blunt Nose
- 6 mm for both BG and MG
Size of Ballast of Track
- 50 mm for both BG and MG
Top Width of Ballast
- 3353 mm (BG), 2286 mm (MG)
Calculation of Gauge Slackness
- Gauge: 1676 mm
- Wheel Gauge: 1600 mm
- Difference: 76 mm
- Thickness of Flange: 28.5 mm
- Thickness of Both Flanges: 57 mm
- Play Between Rail and Flange: 19 mm
- Condemning Flange Limit: 16 mm
- Wear Permissible for both Flanges: 25 mm
- Slack permitted up to 4 degree curve: 13 mm
- Total permissible play between flanges & running edges of rail: 127 mm
- Width of Tyre: 57 mm
- Slackness required to derail a stock: 70 mm
- Calculated slackness may not always cause derailment, but lesser slackness can still lead to derailment.
- 70mm of slack in gauge may not cause derailment if only the cause is the slack gauge.
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Description
This quiz covers the standard dimensions related to the permanent way, including gauge specifications, formation slopes, track distances, clearance requirements, and passenger platform heights. Test your knowledge on measurements specifically for Broad Gauge and Meter Gauge systems.
