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15 Cards in this Set
- Front
- Back
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A trench is a narrow excavation in which the depth is greater than the width and the width is no greater than ______.
A. 10 feet B.15 feet C. 25 feet D. 30 feet |
B. 15 feet |
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One cubic yard of earth weighs approximately ______ pounds.
A. 1,000 B. 2,000 C. 3,000 D. 4,000 |
C. 3,000 |
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Flooding is considered a trenching hazard.
A. True B. False |
A. True |
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Dry sandy soils tends to _____.
A. Slab off B. Crack C. Collapse D. Stay in place |
B. Crack |
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Tools and equipment must be kept at least ______ from the edge of a trench .
A. 1 foot B. 2 feet C. 3 feet D. 4 feet |
B. 2 feet |
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In any trench that is over 4 feet deep, ladders and Ramos used as exist in a trench must be located every ______.
A. 10 feet B. 15 feet C. 20 feet D. 25 feet |
D. 25 feet |
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Shoring, sloping, or other acceptable protections should be used to guard the walls of all excavations more than _____ deep.
A. 1 foot B. 3 feet C. 4 feet D. 5 feet |
D. 5 feet |
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Which of the following is not a form of protection for workers in trenches??
A. Shoring B. Sloping C. Benching D. Vertical walls |
C. Benching |
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The most common hazard during an excavation is _____.
A. A cave-in B. An electrical strike C. A fall D. Flooding |
A. A cave-in |
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Always install shoring from ______.
A. The top of the trench B. The bottom of the trench C. Inside the shoring D. The side of the trench slope |
A. The top of the trench |
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The sides of a simple trench in type c soil should be sloped at a ____ angle from the horizontal.
A. 3/4 to 1 B.1 to 1 C. 1 1/2 to 1 D. 2 to 1 |
C. 11/2 to 1 |
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An information stake next to the surveyors bench mark tells the distance _______.
A. Down to the flow line of the pipe B. Down to the bottom of the trench C. Down to the center line of the pipe D. To the other side of the trench
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A. Down to the flow line of the pipe |
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To determine the grading of a pipeline from top to bottom , the pipe fitter ties a string between two _______.
A. Grade pins B. T- bars C. Information stakes D. Grade rods |
A. Grade pins |
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Because the information stake shows the invert elevation of the pipeline, you need not consider the thickness of the pipe wall or the bedding to dig the trench.
A. True B. False |
B. False |
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Slicing of backfill should be started when the backfill is about _____ of the pipe.
A. Half-way to the top B. One-third of the way to the top C. At the top D. One-quarter of the way up from the bottom |
One-quarter of the way up from the bottom |
