| 1. |
Which one of the following is the purpose of Ballast. |
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Holding the track in line and elevation |
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Providing uniform support for the track |
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Anchoring the track in place |
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Draining water falling onto the roadbed |
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Reducing heaving from frost |
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Reducing heaving from frost |
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All of the above |
| 2. |
According to table 3-1 the maximum size for Ballast gradation is: |
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3-1/2 |
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5-1/2 |
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2-1/2 |
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4-1/2 |
| 3. |
Figure 3-3 shows: |
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A complete finished track |
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An old track in the process of getting repaired |
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A track skeletonized to receive ballast |
| 4. |
Most of the trackage has been built on the wood ties, but there are circumstances where use of concrete ties is warranted. |
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True |
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False |
| 5. |
Wood ties have longer in-use life, geater strength, and better ability to hold rails permanently in line and to gage. |
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True |
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False |
| 6. |
Standard spacing of the wood ties are: |
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22 to 24 ties per 39 feet of running track |
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33 to 34 ties per 39 feet of running track |
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11 to 15 ties per 39 feet of running track |
| 7. |
Track is aligned at the same time it is surfaced. The "line" rail is always aligned and surfaced first, then the second rail. The line rail is the north or east rail. |
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True |
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False |
| 8. |
Heaving of track in winter and spring months is generally an indication of poor drainage or poor ballast conditions, which must be corrected as soon as frost leaves the ground. Until the cause can be eliminated, heaving can be corrected temporarily by using shims to raise the rails on either side of the high spot, thus providing an easy grade.. |
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True |
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False |
| 9. |
Good drainage is the most important single factor in roadbed maintenance. |
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True |
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False |
| 10. |
To provide maximum support for the track structure, subgrades should be kept as dry as possible. |
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True |
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False |
| 11. |
For those portions of trackage structures, the most common form of preventive maintenance is periodic painting. |
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True |
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False |
| 12. |
Sounding with a hammer is one of the best and least expensive methods of testing rail and is a practical way to inspect relatively short section of trackage, elevated crane trackage, and other trackage systems where ultrasonic testing is impractical. |
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True |
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False |
| 13. |
Ultrasonic inspection is a nondestructive test method for revealing internal discontinuities in dense homogenous materials by means of acoustic waves of frequencies above the audible range. |
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True |
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False |
| 14. |
Preventive maintenance Inspection is a visual, continuous routine (shop level) working-inspection. |
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True |
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False |
| 15. |
Track geometry shall be investigated when any of the following conditions exist:
There are indications of abnormal wear on the railheads or on wheel flanges.
New rails are being installed or any portion of a rail is realigned.
Operating crane or railroad engine bind have difficulty in starting or have trouble with movement.
When a potential deficiency of trackage can be observed, heard, or felt.
There are indications of substructure settlement, failure, or other structural changes.
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True |
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False |
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