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Contractors Exam > Pipe & Excavation > Flashcards

Pipe & Excavation Flashcards

1
Q

The advantage of an U blade over an Semi-U blade is it:

A

Holds more material

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2
Q

The best piece of equipment to strip material over a long distance is a:

A

Scraper

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3
Q

What is the purpose of a trench box?

A

To support a wall of soil

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4
Q

When positioning a trench box it is always centered over the pipe. To maintain safety in the ditch, the maximum height above the pipe you should install a trench box is:

A

5 feet

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5
Q

The easiest type of rock to rip is:

A

Sedimentary

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6
Q

The percent of a slope which rises at a 45-degree angle is:

A

100 %

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7
Q

A reference stake is 16.4” from the hub. Fill is to be stated at a distance of 6.8” from the hub. Distances are measured how?

A

Horizontally

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8
Q

Before making a pass, what should the dozer be aligned with?

A

Blade dump area

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9
Q

The level of underground water is called:

A

Water table

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10
Q

Soil that has the maximum amount of water it can hold is called:

A

Saturated soil

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11
Q

Slot dozing has what advantage?

A

It helps transfer more soil

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12
Q

What is the best piece of equipment to dig a trench in soft soil?

A

Tracked backhoe

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13
Q

What is the problem with excavation in narrow spaces?

A

You cannot easily add water necessary for wetting

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14
Q

The best method to use to estimate earthwork is to:

A

Divide into sections

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15
Q

What will increase the productivity of a self-loading scraper in muddy soil?

A

A dozer pushing on the push blocks at the rear of the bowl

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16
Q

The effect of loading uphill using a scraper is:

A

It increases cycle time

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17
Q

What is the hardest part of the grader’s work?

A

Finish blading

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18
Q

The advantage to using an angle blade over a straight blade is to:

A

Sidecast materials

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19
Q

The type of blade preferred when pushing soil over long distances is:

A

U Shaped

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20
Q

What is the best dozer to use for landscaping?

A

Light utility dozer

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21
Q

If an operator fails to lift, tilt, and angle the blade of a dozer just right:

A

Most of the load is lost

22
Q

The amount of water required for a given soil to reach maximum density is known as the:

A

Optimum moisture content

23
Q

The advantage of nuclear compaction testing is:

A

You do not have to remove the soil from the site

24
Q

If you are working a job that has silt or clay soil that has become saturated and compaction is an issue, what should you do?

A

Haul it away and replace it with dry soil

25
Q

What do contour lines show?

A

They connect points of the same elevation above or below a reference

26
Q

Load factor =

A

Bank volume divided by bank volume + swell factor

27
Q

The best piece of vibratory compaction equipment in situations where you have a wide trench and no cross-lines is:

A

Sheepsfoot roller

28
Q

Horizontal distances are measured with a:

A

Tape measure

29
Q

A well-point system is the best method for dewatering in:

A

Sandy soils

30
Q

What is the easiest method for compaction?

A

Puddling

31
Q

What is the normal range of speed for dozing?

A

1.5 to 4 MPH

32
Q

A downhill slope is a:

A

Negative grade

33
Q

Which of the below would increase the dozer’s blade capacity when moving materials?

A

Negative grading

34
Q

You are excavating an area 245 feet by 350 feet; the equipment can remove 100 cubic yards per hour. If you need 6 inches of grade cut off the whole area, how many hours would it take?

A

15.88 hours

35
Q

What type of equipment should be used to dig a trench in soft soil?

A

Tracked excavator

36
Q

A parking lot is 140 feet wide, and it slopes 1/8th inch per foot. The highest elevation is 80 feet. What is lowest elevation?

A

78.54 feet

37
Q

What is the definition of a benchmark?

A

A fixed reference point of laying out a building

38
Q

How many feet are there between surveying stations that read 1 + 50?

A

150 feet

39
Q

You are checking elevations in an excavated area. There are 3 stakes set called A, B, and C. The A stake is labeled 3’4”, the B stake is labeled 4’10” and the C stake is labeled 7’2”. What is the difference between stake A and C?

A

3’10”

40
Q

A reference stake has 13’8” and F 8’3” written on it, what does the 13’8” mean?

A

13’8” from the edge of the fill area

41
Q

An effective way of moving materials a short distance downhill is:

A

A Tracked loader

42
Q

What is the calculation for production trenching / moving dirt in a backhoe set?

A

Divide volume of dirt by dirt moved in cycle

43
Q

What is the best method to estimate earth work on irregular ground?

A

Divide the plan into grids or sections

44
Q

What is the best method for hauling dirt over a long distance?

A

Self-loading scraper or loader and truck

45
Q

What is the best method for compacting sand and gravel?

A

Puddling and vibration

46
Q

Which of the below would be used for excavating shallow trenches with cross lines?

A

Wheeled / Rubber tire backhoe

47
Q

In what direction does the shock wave of an explosion travel?

A

The path of least resistance

48
Q

What is a hub?

A

A small stake driven into the ground to identify some reference point.

49
Q

What is driven into the ground near the hub?

A

A reference stake.

50
Q

If the reference stake shows only a station number where can the reference data be located?

A

The information that is normally on a reference stake itself will be on the “Cut Sheet”.

51
Q

What is a cut sheet?

A

A form showing elevations, cuts, and horizontal distances to a fixed point.

Contractors Exam (12 decks)

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