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NC Highway Contractor > Module 1 > Flashcards

Module 1 Flashcards

1
Q

What are the two descriptions of bucket capacities?

A

Heaped and Struck

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2
Q

The maximum capacity of the bucket with material heaped above the edges

A

Heaped capacity

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3
Q

The capacity of a bucket filled to the level of the rim- water carrying capacity

A

Struck capacity

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4
Q

The factor used to compensate for the swell of soil volume

A

Load factor

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5
Q

The formula for load factor is

A

bank volume /bank volume+swell %

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6
Q

The formula for compacted volume of material is

A

Bank Volume -shrinkage%=compacted CY volume

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7
Q

A ____________ roller is effective in compacting a wide trench that has no crosslines

A

Sheepsfoot

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8
Q

A __________ roller is effective in a narrow trench and for compacting around crosslines

A

Hoe- mounted vibratory

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9
Q

A ________ is a small stake driven into the ground to identify a reference point

A

Hub

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10
Q

The distance shown on the reference stake is a horizontal distance from the hub to the ______ or ________ to begin

A

Cut or fill

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11
Q

_________ rise is expressed in units compared to a _________ distance of 100 units

A

Vertical and Horizontal
a 5% slope will rise 5 vertical feet in a horizontal distance of 100 ft

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12
Q

A __________ angle is a 100% slope

A

45
if the rise is equal to the run, the slope is 100%

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13
Q

To calculate slope as a percent, divide_______ by the the ___________

A

Vertical rise by the horizontal distance

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14
Q

The level of the underground water is known as the ___________

A

Water table

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15
Q

The water table varies in depth from ____________

A

Season to season

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16
Q

Groundwater creates problems for the utility contractor as it ________

A

Creates unstable soil that is dangerous to work in and cannot be used as backfill

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17
Q

A ________ can be used to lower the groundwater table in bad groundwater conditions

A

well point system

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18
Q

A _____ is the length of a trench a backhoe can excavate in one position

A

Set

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19
Q

A set can be further broken down into ____________

A

Digging cycles

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20
Q

To calculate the time required to excavate a set divide_______

A

Volume of dirt in set/dirt removed per cycle= digging cycles per set
Digging cycles per set Average cycle time= time required to excavate a set

21
Q

To calculate backhoe production rates, the ________ of the bucket must be considered

A

Heaped capacity

22
Q

The two most common methods of compaction are ____ and _____

A

Puddling (water settling- washed gravel or sand) and a combination of weight and vibration

23
Q

________ is the easiest compaction method

A

Puddling

24
Q

Manholes are used to _______

A

Change direction of Iines and at intersections of lines from different directions

25
Q

Push scrapers are used on _________

A

extremely large earth moving projects

26
Q

A self loading scraper is more productive in hard or muddy soil when assisted ________

A

By a dozer pushing on the push blocks at the rear of the bowl

27
Q

Road graders work to very close tolerances and are used primarily for _______

A

trimming the cut and fill area and processing material

28
Q

______________ is the hardest part of a graders work

A

Finish blading

29
Q

_______ can be used for light clearing and grubbing, maintaining haul roads and finish grading

A

Graders

30
Q

__________ uses are residential/commercial foundations, fine grading, trench backfill, landscaping, light logging, swamp dozing

A

Light utility dozer

31
Q

________ dozer applications include trench backfill, logging, road building, land leveling, light duty ripping, tree and stump removal, and short distance production dozing

A

Mid-sized production

32
Q

_______ dozer applications include production dozing, ripping, push scrapper work and road building

A

Heavyweight

33
Q

If a dozer operator does not lift, tilt and angle the blade properly most of the load ______

A

will be lost before getting to its destination

34
Q

_______ convert engine power and machine weight more efficiently than rubber tires on dirt surfaces

A

Crawler tracks

35
Q

A _____ will work in soft soil while a ____ will bog down

A

track dozer ; wheeled machine

36
Q

There are two common dozer blade positions ________ and _________

A

Dozing position- blade at 90 degrees to the line of travel and angle dozing position

37
Q

Whenever possible, align the the direction of dozer travel with the ___

A

Blade dump area

38
Q

Rows of spoil created by part of a load lost off the blade of a dozer are called _______

A

windrows

39
Q

You can reduce the amount of load lost while dozing by _________

A

slot dozing

40
Q

“A” blade dozing allows the dozer to ___________

A

sidecast material and position it at 90 degrees to the line of travel

41
Q

A ________ grade is an uphill slope

A

Positive

42
Q

A _______ grade is a downhill slope

A

Negative

43
Q

The blade load capacity of a dozer _____ when a load is pushed down a negative slope of 40 degrees

A

Doubles

44
Q

The blade load capacity of a dozer _____ when a load is pushed up a positive slope of 40 degrees

A

Is cut in half

45
Q

The contractor shall submit a blasting plan to the engineer within _______ after each shot.

A

24 hours after

46
Q

_________ is a condition of wrinkling, bubbling or ridging turf following installation

A

Buckling

47
Q

The test for septic systems to determine the soil is ________

A

Perk test (percolation test)

48
Q

_________ is the loosening of soil

A

Swell

NC Highway Contractor (3 decks)

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