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tony: nc contractor exam > Site Work > Flashcards

Site Work Flashcards

1
Q

Which of the below rocks would be the easiest to rip

A

3 – Sedimentary

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2
Q

type of dozer blade should be used when pushing soil longer distances?

A

“U” shaped blade

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3
Q

When dozing over a long distance, which of the below could be used to keep the dozer from losing its load?

A

Use the slot dozing method

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4
Q

A 45 degree slope would be which of the below?

A

100 % slope

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5
Q

When doing dozer work, which of the below would be the advantage of an angled blade over a straight blade?

A

Side cast material

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6
Q

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

A

Negative grading

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7
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

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8
Q

What type of foundation should be used for deep unstable soils?

A

Mat

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9
Q

The amount of water in a given soil that will produce the maximum density with a given compaction is which of the below?

A

Saturated

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10
Q

A soil compaction test where no drilling required would be which of these?

A

Nuclear test

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11
Q

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

A

Tracked excavator

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12
Q

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

A

– 78.54 feet

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13
Q

The starting point is shown as Sta 0 + 00 and next station is shown as Sta 2 + 50, what is the distance between the two points?

A

250 feet

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14
Q

Reference stake reads Sta 2 + 50, El 2500.47, and C 9.63. What would be the elevation below the reference hub?

A

2490.84 feet

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15
Q

What is the purpose of a trench box?

A

– To support a wall of soil

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16
Q

What is the effect of loading uphill when a scraper blade is being used?

A

It increases load cycle time

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17
Q

The right amount of moisture for compaction is called:

A

The optimum moisture content

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18
Q

What determines how much moisture that air can hold?

A

Temperature

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19
Q

If you have a rise of 88 feet in one mile, what would the rise be?

A

1.66 percent

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20
Q

Which of the below would be the least desirable soil for a foundation?

A

– Clay

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21
Q

What is the definition of a benchmark?

A

A fixed reference point of laying out a building

22
Q

– How many feet are there between surveying stations that read 1 + 00?

A

100 feet

23
Q

– What are a shear vane and a pocket penetrometer used for?

A

Strength tests

24
Q

What is the best method for lowering the water table on a level lot?

A

Install a well point system

25
Q

What is the advantage of using an Angle Blade to start excavation and an S-Blade to complete final grading?

A

Very effective for side cast backfill material

26
Q

– What is the normal dozer speed?

A

1.5 to 4 mph

27
Q

Which of the below are not used for manually testing soil types?

A

Sand cone test

28
Q

When dozing, what method is used to move soil over long distances?

A

Two dozers in tandem

29
Q

How can you protect excavator from hazards associated with water accumulation in excavation?

A

Monitor the use of water removal equipment

30
Q

– Slopes for permanent fill shall be not less than:

A

1:2

31
Q

Which of the below tests can be performed on site without removing the samples?

A

The nuclear density

32
Q

What is the most difficult (harder) part of a road graders work?

A

Finish blading

33
Q

How are “stations” (referenced stake and cut stakes) measured?

A

Measured horizontally

34
Q

A reference stake is 18’8” from the hub. A fill has to be started at a distance of 8’4” from the hub. How are these distances measured?

A

Horizontally

35
Q

is the load factor calculated with bank volume and swell factor?

A

Bank volume divided by bank volume + swell factor

36
Q

A grade stake on an excavated area is marked 2’8” with the letter C above it and above that a solid line drawn horizontal on the stake. What does this mean?

A

The dirt is cut below 2’8” from the elevation of the solid line

37
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”

38
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

39
Q

What is the maximum allowable tolerance in finishing of subgrade from the established grade from one station to the next?

A

1 inch

40
Q

Which equipment would be best suited for fine grading and landscaping work?

A

Light utility

41
Q

What type of blade would be best suited for self-loading hauler equipment to move soil over a longer distance?

A

Scraper blade

42
Q

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

A

Tracked loader

43
Q

What is the easiest and cheapest compaction method?

A

Puddling

44
Q

How can you increase dozer blade capacity?

A

Downgrade dozing

45
Q

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

A

Divide volume of dirt by dirt moved in cycle

46
Q

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

A

Divide the plan into grids or sections

47
Q

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

A

Self loading scraper or loader and truck

48
Q

What is the best method for compacting sand and gravel?

A

Puddling and vibration

49
Q

If the operator fails to lift, tilt and angle the blade when dozing, what will occur?

A

– Looses load

50
Q

A reference stake has 18’8” to centerline and 8’8” cut to the top of fill. How are these dimensions measured?

A

Horizontally and vertical

51
Q

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

A

Wheeled / Rubber tire backhoe

tony: nc contractor exam (13 decks)

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