| 1. |
The NOS is abbreviated as ____________________________. |
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National Ocean Service |
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National Ocean Survey |
| 2. |
EDMI is abbreviated as ______________________. |
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Electronic distance measuring instruments |
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Electronic displacement measuring instruments |
| 3. |
A Standard calibration baseline comprises of ________ monuments. |
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Two |
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Three |
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Four |
| 4. |
NGS plans to periodically re-measure a number of selected baselines to test the long-term stability of the monumentation or to re-establish the baselines as necessary. |
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True |
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False |
| 5. |
The standard baseline comprises of ________ monuments set in a straight line with a total length of about ______________. |
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Two 1400 mt |
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Three 1400 mt |
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Four 1400 mt |
| 6. |
Invar is a _______________ alloy developed in France. |
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Steel-nickel |
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Aluminum-nickel |
| 7. |
What is the unique property of the steel-nickel alloy? |
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Its coefficient of thermal expansion is about 1/125 that of pure steel |
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Its coefficient of thermal expansion is about 1/25 that of pure steel. |
| 8. |
It is required to set the intermediate and terminal monuments within a few centimeters of the suggestd distance. |
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True |
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False |
| 9. |
The need for an intermediate monument about 400 o 430m from a terminal has resulted from the introduction of EDMI with ranges limited to 500m. |
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True |
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False |
| 10. |
Most EDMI are designed such that the basic yard stick for the instrument is 30 or 40m. |
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True |
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False |
| 11. |
For the site selection of a calibration baseline, the location should be easy to reach with minimum restrictions and safe for general public use. |
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True |
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False |
| 12. |
The ideal choice for a site would have a gradual downward slope from the 0 m monument to the middle of the line, then a gradual upward slope to the terminal point with the ends of the line at about the same elevation. |
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True |
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False |
| 13. |
The important consideration here to 100 ft tape calibration station is that the ground over the tape measurements are to be made is reasonably level and always exceeds a 2 − percent grade. |
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True |
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False |
| 14. |
A range should be established within 0.4 km (0.25 miles) of high voltage ( greater than 4Kv) transmission lines, microwave towers, radio masts, or radar facilities. |
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True |
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False |
| 15. |
Monuments cannot protrude slightly above the ground or be set below ground level, depending on specific circumstances. |
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True |
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False |
| 16. |
In concrete monuments, the hole is dug to a depth of _____ to ______ with either a square or circular cross section and about 0.36m or more in diameter. |
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0.1m to 1.5m |
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1.1m to 1.5m |
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0.1m to 1.1m |
| 17. |
The top form of a concrete monument can be in the shape of a _______________. |
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Cone |
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Pyramid |
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Cylinder |
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All the above |
| 18. |
A __________ may be used as a top form for concrete monuments. |
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Plastic |
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Paper cement |
| 19. |
In a rock outcrop, the rock in which a mark is set should be hard and part of the main ledge, not a detached frame. |
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True |
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False |
| 20. |
The main considerations in making the concrete are _________. |
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Clean materials |
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Mixture isn’t too wet |
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Tamp well into the form |
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All the above |
| 21. |
The formula for computing the vertical sag is _______________________. |
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Sag = y =ws²/8t |
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Sag = y =ws/8t |
| 22. |
One of the primary purposes for the use of a calibration baseline is to test the user’s ability to set up and plumb their own instruments. |
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True |
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False |
| 23. |
Elevation differences between monuments will not be obtained using double run and third run procedures. |
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True |
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False |
| 24. |
The 150 m section will be measured with 50 m standardized Invar tapes using ______________ taped base line procedures except for the following changes that the copper strip and scribe will not be used. |
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First order |
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Second order |
| 25. |
The 30.48-m section will be measured with a _____________ standardized Invar tapes to a temporary scribe on the 30.48 mark. |
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50ft |
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100ft |
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150ft |
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