Study Guide C-12 Test Questions Flashcards by Edwin Amaya

What are the standard size of HANDICAP accessible stalls in a parking lot ?

18’ x 9’ ( 216” x 108” )

How well did you know this?

Not at all

Perfectly

What are the standard size of standard, compact car stalls in a parking lot ?

15’ x 6’

How well did you know this?

Not at all

Perfectly

What are the standard size of standard, large size car stalls in a parking lot ?

19’ x 7’ ( 228” x 84” )

How well did you know this?

Not at all

Perfectly

What is considered first when planning a traffic control zone ?

The safe flow of traffic through the zone

How well did you know this?

Not at all

Perfectly

How many type 2 barricades does it take to close the shoulder and one lane of a freeway ?

4 barricades

( 2 for each lane closed and 2 for the shoulder )

How well did you know this?

Not at all

Perfectly

According to cal trans , paint applied to pavement in one coat must be applied at a rate of 1 gallon per:

107 sq ft

How well did you know this?

Not at all

Perfectly

According to cal trans, stripes and pavement marking on new surfaces must be applied with how many coats, unless otherwise required specifications ?

2 coats

How well did you know this?

Not at all

Perfectly

Which color is most commonly used for stall outlines ?

White

How well did you know this?

Not at all

Perfectly

Lighting poles in a parking facility are usually installed _____ of a double row of parking stalls.

Along the centerline

How well did you know this?

Not at all

Perfectly

What is overhang ?

Distance from from the striking face of a wheel stop to the property line or wall

How well did you know this?

Not at all

Perfectly

How long should you wait before you put a second coat of striping paint on a freeway ?

Until first coat is dry

How well did you know this?

Not at all

Perfectly

When laying striping lines, spots should be placed a maximum of every ____ on curves

5 feet

How well did you know this?

Not at all

Perfectly

How long must you wait before you put pavement markers on new asphalt that is open to traffic ?

7 days

( 14 days IF you use epoxy adhesive )

How well did you know this?

Not at all

Perfectly

Experience has established a _____ width of line as the best practice for pavement markings

5 inch

How well did you know this?

Not at all

Perfectly

How do you know you are reaching maximum compaction when rolling with a sheepsfoot roller ?

Roller will start walking out of the compaction area

How well did you know this?

Not at all

Perfectly

Why would you put fabric down over old asphalt when overlaying with new asphalt ?

To help control reflection cracking

How well did you know this?

Not at all

Perfectly

Where do you dispose of broken concrete ?

Landfill ( if not does meet requirements to put along roadway)

How well did you know this?

Not at all

Perfectly

What is benching ?

Making a step-like cut into a slope. Used for erosion control and to tie or key in new fills to an existing slope

How well did you know this?

Not at all

Perfectly

According to Caltrans specifications, no more than ___ (by weight ) of high-calcium hydrates lime used for treatment of bases may be retained on a No. 30 sieve.

How well did you know this?

Not at all

Perfectly

Most specifications for lime- treated bases require mixing to be completed within _____ hours

72 hours

How well did you know this?

Not at all

Perfectly

According to Caltrans specifications, lime should be added to base material to be treated __ to___% ( by weight) of the dry material

2.5% to 5%

How well did you know this?

Not at all

Perfectly

According to Caltrans, lime treated base material may not be mixed or spread when atmospheric temperature is below :

35˚F

How well did you know this?

Not at all

Perfectly

When working close to an obstruction , such as a manhole, it is preferable to leave a small plug of dirt in the trench, what machine is known to leave a small plug ?

Bucket line trencher

How well did you know this?

Not at all

Perfectly

According to Cal/OSHA, all trenches _____ or deeper, must be shored, benched , sloped or otherwise protected.

5 feet

How well did you know this?

Not at all

Perfectly

What is a hinge point ?

A point where the fill slope and the road or shoulder grade begin

What is a hinge point ?

A point where a fill slope stops and the road or shoulder grade begins

What is the first step when applying lime to a sub-base surface ?

Scarify the sub base

Lime cures slowly. Sometimes a lime base will initially fail the compaction test. If this happens you should allow about ____ hours to set before retesting.

18 hours

Which equipment would you use for digging a ditch 6 inches wide and 2 feet deep ?

Wheel trencher

What is the correct equipment to use for digging a manhole ?

Backhoe

You are pouring concrete around a culvert. Once it is buried , the distance between the embankment and culvert must be at least :

6 inches

If you are digging a 5 ft trench for a pipe, how wide should the embankment be ?

8 feet

According to Standard Specifications for Public Works Construction , roots must be removed to a depth of ____feet . The asphalt institute requires only ____ feet.

3 feet 2 feet

What does it mean when blue smoke comes out of an asphalt truck ?

Mix is too hot

After aggregate has been watered, spread, and rolled, what stakes should the grader operator follow for fine trimming ?

Guineas or blue tops

Immediately before applying asphaltic emulsion, the surface to be seal must be :

Clean and dry

Standard concrete reaches its design strength in how many days ?

28 days

What is double dumping ?

Spreading a lift of earth material over a previously placed lift that had not been properly compacted

What is stabilization fill ?

An equipment width compacted fill

On public works project, how is concrete removal paid for ?

Per cubic yard. Square yard, or lump sum

Which type of slurry seal contains the most asphalt filler?

Type 1

Asphalt concrete is estimated and sold by the:

Ton

What is the minimum recommended size roller for most street and highway paving ?

10 tons

What is the maximum slope for a curb ramp on a sidewalk ?

1:12 ( 8.3%)

When navigating a slope, at what angle should the equipment operate ?

Parallel to slope

When compacting base aggregate, the lifts should not be more than :

6 inches

When depositing a structure backfill against the back of a concrete retaining wall, it cannot be placed until after concrete has developed a 28-day strength OR a strength of at least ______ psi

2,500

Construction materials may not be stored on streets, roads, or highways for more than _____ after unloading

5 days

“ Road-Oils” are :

Slow-curing cutback asphalts

How many pounds of aggregate should be added to coal tar pitch ?

3 to 6 lbs per gallon

A seal coat should not be applied to a new asphalt concrete surface until _____ days after spreading and compacting of the new asphalt concrete

30 days

Spray bars must have a length of at least :

9 feet

How much is an “ extra long ton “ (ETL) of slurry and what does it include ?

2,000 lbs of dry aggregate Includes emulsified asphalt , water and any accelerators used.

Seal coats must be allowed to cure for a least ___ between applications

4 hours

The thickness of each layer of structure backfill must not exceed _____ before compaction , except that if compaction if done by ponding and jetting, the thickness of each layer may be as much as _________

0.67/ft ( 8”) 4 feet

Slurry cement backfill must be placed within ____ after mixing

1 hour

Immediately before applying coal tar emulsion, the pavement surface must be :

Dampened

Tree stumps are located in an embankment area where you are working. What must you do ?

Clear away stumps to a depth of at least 2 feet below the original ground level. ( Asphalt Institute )

What type of equipment would you use to compact clay ?

Sheepsfoot roller

A steep, nearly vertical slope along the margin of a landslide is called a :

Scarp

The maximum slope of an excavation constructed on a hillside is:

2 to 1

When finish-grading, what is the allowable tolerance ?

0.08 ft

What is the minimum width of a temporary traffic lane ?

10 ft

In grading for a curb, the grade setter marks: “ 2 TBC C-1.00”. What does this mean ?

Two feet from top back of curb cut one foot

Each trench must have a uniform bearing throughout the entire length and must be free of jagged rubble, rock, broken concrete, asphalt concrete and sharp objects greater than ___ inches in greatest dimension.

2 inches

According to CalTrans, the center of a highway sign must be at least ____ feet above pavement level

PUBLIC WORKS CONSTRUCTION requires roots must be removed to a depth of ____ ft below existing ground surface or sub-grade .

3 feet

ASPHALT INSTITUTE requires roots must be removed to a depth of ____ ft below existing ground surface or sub-grade .

2 feet

You should deposit a structure backfill in ___ inch lifts against a lime concrete retaining wall that has cured to 28-day strength

6” to 8”

Which compaction test is the oldest and most accurate ?

Sand cone test

Which compaction test is the fastest ?

Nuclear

How is a man hole constructed ?

Bottom , barrels, cone, grade rings, top casting

In most soils, __ to ___% water must be added to start the action of lime

15% to 18%

When using a wheel trencher, it should be equipped with a ___ to keep loose dirt from being left in the bottom of the trench behind the wheel.

Crumbing shoe

According to Caltrans, at least ___ of cement must be used for each cubic yard of soil cement bedding produced .

282 lbs

Excavation required to construct a ditch or channel designated with a bottom width of __ OR MORE is classified by CalTrans as a roadway excavation

12 feet

At night, traffic warning lights must broadcast a ____ light, and flaggers must use a _____ light.

Yellow ; Red

What are chokers ?

Road shoulders that must remain higher than subgrade level

What is the maximum joint distance in sidewalks ?

3 m

A model 12 grader can rip asphalt less than ___ thick and still get good production

4”

If asphalt is 4 inches thick, what machine should you use to rip it ?

Model 14- grader plus a rear ripper rack

Is asphalt is 6 inches thick or more, what machine should you use to rip it ?

Model 16 grader or dozer with rippers

When working slopes on a rocky job, the operator Should level and smooth out the bottom grade the tractor is working from :

After each slope pass

If drill rig is used to remove soil adjacent to utility lines, the holes should be ______ after the work is finished

Backfilled

Most job specifications require asphalt to be spread when ambient are temperature is at least :

40˚F

Most job specifications require OPEN-GRADED asphalts to be spread when ambient air temperature is ____ or more

60˚F

What is the diameter of #4 rebar ?

1/2”

Why would you apply a slurry coat to a roadway ?

You need to stripe the roadway Roadway is too slippery Roadway is old and cracking

What does the term “balanced dirt job” refer to ?

No excess in cut and fill job

What is the best choice for erosion control ?

Rye grass

What is the recommend pumping temperature for asphalt cement used for under sealing PCC pavements ?

200˚ to 300˚ C

What is the maximum recommended atmospheric temperature in degrees Celcius for mixing or plain concrete ?

2˚C ( 35˚ F )

If the bottom width of a ditch or channel exceeds 12 feet, the width must be at least ___ outside the slope.

5 feet

If the bottom width of a ditch or channel of LESS than 12 feet, the width must be at least ___ outside the slope

2 feet

To determine the type of undisturbed substrate underlaying soil, the most reliable method is:

Test pits

Which tractor is used for finished grading ?

Motor grader

Asphalt emulsion should be what type ?

Cationic

If you are removing cold asphalt slightly thicker than 4” , what machine should you use ?

Scraper followed by a push dozer or grader

If you are removing asphalt approximately 10” thick in a narrow area, what machine is best used ?

Track hoe

During asphalt paving, approximately how long will the asphalt mat be for each load of a 25-ton bottom dump truck ?

180 feet