EXAM #1 Flashcards
When doing earthwork compaction, ___ of uniform thickness are often used.
6”
After the construction operation is completed, excretion of bituminous material on a roadway surface is called?
Bleeding
The type of excavation where the grade is set best with nylon/string line is:
Setting forms
Preparing curb for machine
Pipe
HP, on a stake, stands for the
Shoulder
Initial or breakdown compaction should be accomplished with a roller weighing not less than:
12 tons
In the side of a hill, the first cut is known as a:
Shelf
After placement most soils will:
Shrink
What is the purpose of the screed as it is pulled into the material deposited in front of it by the spreading screws?
It seeks a level
Open-graded asphaltic concrete is coars asphalt concrete which usually has what size aggregate?
3/4”
The edges of the pavement should be rolled ___ with the longitudinal joint, with the exception of echelon and deep lift paving
Concurrently
How many days must be allowed for curing after oiling before equipment or traffic allowed on grade in most cases?
3
The working platform of any scaffold that is suspended from an overhead support, such as a painter might use, shall have a safety rail of wood or other rigid material if it is more than ___ feet off the ground.
7 1/2
Open-graded mixtures should be placed only when the temperature of the atmosphere is above ___ °F.
60˚
Known expansive soils should be compacted ___% on the wet side of the L.O.M. content.
1 or 2 %
Highway construction areas, including structures, frontage roads, or streets, ramps, approaches, ditches and channels, shall be cleared of all vegetable growth, such as tres, logs, upturned stumps, roots, brush, grass, weeds and all other objectionable material to a width of ___ feet outside of the roadway or excavation.
5 feet
Rollers should roll with the drive wheel ____ in order to achieve maximum consolidation.
Toward the paver
What is the recommended maximum gradient discussed for handicapped?
0.08 or 2%
How many trucks can a half yard payloader fill in 7 hours if it is able to load one truck in 12 minutes?
35
What is the bottom part of a sewer drain called?
A hub
When the material cools to ____°F rolling is not effective.
185˚
The style of foundation that is commonly used in warmer climates is best known as a:
Slab on grade foundation
For digging a long distance trench 2″ x 10″, the best equipment to use is a
Bucket line trencher
During construction, when installing safety rails around floor and wall openings, the top guardrail shall be at least 42 inches high and be able to withstand a ___ load.
200 lbs
Usually, static weight tandem rollers weigh ____ for breakdown rolling.
8 to 12 tons
The ease of paint combustion is measured by:
It’s flash point
If a worker gets chemicals on his/her skin or eyes he/she should bathe the exposed area for:
15 minutes
Mud pumping is done when:
Subgrade has large amount of fine particles and has too much moisture
What should be done first using a sheepsfoot, grid or mesh self-propelled roller?
The subgrade
Hinge point is also referred to as :
Catch point
What flows _______ to the countours
Parallel
The trench walls must be sloped a minimum of ___ rise vertically, if the trench sides are too soft for shoring.
3/4 to 1
The most common soil density test is a/an
Nuclear test
The material placed in a core dam to stop breathing is a:
Key
Which of the following fire extinguishers is best to have on a construction site?
Class ABC
Because of ____ a penumatic-tired roller is effective at the wheel load
Pressure contact
What is any sandy material that flows when saturated with water known as?
Quicksand
The elongation at which a thread of asphalt cement material breaks is specified as the ___ of the asphalt.
Ductility
What is the next step after ripping, when ripping and re-compacting existing road?
Scrape the ripped asphalt into windows
What are the operating hours for type A warning lights?
Dusk to dawn
What are holes left in the concrete surface when the forms are removed called?
Honeycomb
When bell and spigot cast iron pipe is to be laid in a trench which has been mechanically excavated, the “bell-holes” are usually dug by:
Bulldozer
A 25% slope is equivalent to one foot vertical to every how many feet horizontal?
5 ?
When removing more than ___ cubic yards of soil from a project, a permit is required.
50 cu.yds
Aggregate subbases shall be watered and the relative compaction of each layer of compacted subbase material shall not be less than:
95%
In most soils, ___ % water must be added to start the action of the lime.
18%
The amount of compaction is the ___ of soil.
Density
When a trench is very wide or the walls have to be sloped, you would use a:
Backhoe
A 2 x 4 piece of lumber driven into the ground so that a sring line can be stretched across and above the road surface is a:
Bank plug
The types of asphalt concrete used for paving are:
Type A , B , and C
What is the volume of a hole 120 feet long, 30 feet wide, and 6 feet deep?
800 cu.yds
In fresh fills, it is most important to have good proper compaction. In compacting soil, it is best to:
Roll and tamp every 18”
The materials under tension which can be drawn out to a considerable elongation without fracture are:
Ductile
The aggregate, when designed for surface treatment as it is spread over the asphalt sprayed surface, contains approximately percent voids between particles?
60%
The perfect aggregate shape is:
Square
Open graded asphalt concrete should only be rolled with a steel-tired 2 axle tandem roller weighing not more than:
10 tons
When placing concrete in a tall form, it is best to pour it in layers of __ to __ inches in depth.
6” to 24”
Runoff is probably goingto be highest from a:
Suburban area
Boards of proper thickness should be placed at the pavement edge. In order to prevent damage, if they are not used, transverse rolling must stop short of the edge by:
6” to 8” inches
In trenches 4′ deep or more safer access within ___ feet of any work area must be provided.
25 feet
Relative compaction of not less than what percentage will be obtained in all material in embankments unless otherwise specified?
90%
When constructing an arch, the scaffolding used is known as:
Formwork
Which of the following is used to cut asphalt, thereby making it moe flexible?
Kerosene
On a contour map, a valley would be shown with the contours pointing:
Uphill
Both horizontal and vertical surfaces are generally cleaned with ___ when in contact with new asphalt mix.
Rotary brooms
To what percentage should embankment fill usually be compacted?
90%
Traffic should be kept off the tacked area when possible, however, if traffic must use the road speed should be controlled to:
25 mph or less
Where do surveyors indicate the finish curb level?
At the top back edge of the curb
Soft pipes can be crimped to stop a broken line: copper can be bent and hammered shut. If galvanized pipe is cut:
Drive a redwood plug into it
What is a drain that goes under a paved road called?
A culvert
Aggregate subbase, purchased in quantities, will be paid for at the contract price by the:
Cubic yard and Ton
The temperature range of all asphalt concrete being delivered to the job shall be:
> 200˚F
What is the lowest point on the interior cross-section of a storm drain known as:
Invert
Asphalt mixes (cold) contain:
Emulsified or cutback agents
Concrete will ___ with age.
Strengthen
Cutback asphalts are divided into ___ on the basis of the relative speed of evaporation.
3 types
Mortar for cement joints shall be composed of:
One part cement , two parts sand
The most important requirement when using a transit is to:
Level it
Earth that requires a pick to break it up, such as adobe, clay, harpan, etc. is known as:
Hard
What is used in supporting the side of trenching?
Whalers
The layer or layers of specified material of designed thickness placed on a subgrade in order to support a base course is:
The subgrade
When excavating a car park 500 x 60 and a 9″ layer is taken off the top, ___ cubic yards are being removed.
833
The strip of level land at the top of a slope is called:
Berm
A scalene triangle measures: A=20, B=16, C=14. What is the area?
111.24
How should every gravity flow sewer line be laid?
from the downstream end of the line to the upstream end
All courses above the subgrade or foundation are known as the asphalt pavement structure. These may be from less than ___ in. to more than ___ inches.
1” to 3”
For concrete sewer pipe, approximately ___% of the joint at the base of the socket shall be filled with jute or hemp.
25%
A single surface consists of a sprayed application of asphalt immediately covered by:
A single layer of aggregate
A drain pipe should generally be a minimum of ___ inches in diameter
6”
The first thing the driver should encounter, when approaching roadwork is/are:
A caution sign
How many hours must the concrete harden when constructing manholes and setting concrete for manhole bottoms, before the pipe is laid throught the concrete?
Approx. 12 hours
The most common cause for asphalt not meeting the required specifications is:
Contamination
Which should be used when digging a trench on the road in a location that is heavily populated:
Trencher
Final compaction shall be completed within ___ hours of final mixing.
36 hours
What is the best method of purging natural gas from a sewer line?
Blow nitrogen through it
A very high expansion soil is:
Above 130
Continuous beam must be continuous over:
3 or more supports
The extra time allowed for trimming the subgrade will save on the final trimming. Usually plus or minus ___ is the tolerance allowed for lime treated base.
0.08
True or false:
Blend of cement and limestone can be used as a filler in asphalt
True
The first step in figuring tons of asphalt material that is required per mile for various widths and pounds per sq. yd. is:
Determine sq.ft of road
A joint in the construction of concrete paving designed and installed to prevent the failure of concrete because of change in temperature is a ___ joint.
Expansion
The basic starting point for use of an optical level or transit is:
Bench mark
Buildings are classified by construction type or by:
Occupancy group
Which are the tests for asphalt concrete:
Float test
Penetration
Viscosity
If constructing a structure immediately next to another structure and the excavation is going to be deeper than the existing structure foundation, it requires:
Underpinning
True or false :
Tack coats are applications of asphalt sprayed on to the surface of an existing pavement prior to an overlay
True
All trees, existing stumps and roots within embankment areas where the grading plane is 2 ft. or more above the natural ground, shall be cut off not more than __ above the natural grade or completely removed where a structure is to be constructed, piles are to be placed or drainage ditches to be installed.
12”
Which of the following is the most useful method of soil sampling in granular or dense soils?
Split spoon
When making cuts for highway grading, the second step is:
to make a slope cut to the other ditch
Best results for tack coat are obtained:
If road is dry
No threat of rain
Surface temp above 80˚
Bituminous concrete is:
material that is suitable from sources outside the roadway prism and used for embankments principally
All lime shall be thoroughly mixed into the soil after lime spreading operations have been performed during what time frame?
The same day
An asphalt pavement or surface treatment placed on a granular base that is sprayed on the liquid asphalt letting it penetrate the base is a:
Prime coat
What is the minimum effective intensity for type A warning lights?
4.0 candelas
A measure of the ___ of the asphalt cement is the solubility test.
Purity
Rolling of asphalt concrete paving must continue until the compressed asphalt paving mixture has a specific gravity to not less than ___% of that obtained with the same mix compressed in the lab.
95 to 100
When making cuts for highway grading, the fourth step is:
to cut a slope to the center line of the road
An application of bituminous material, cover aggregate or thin plant mix on an old pavement structure is called a:
Surface treatment
If bed rock can be broken with a tool such as a sledge hammer, the rock is:
Common
The finished thickness of the lime-treated material shall not vary more than ___ from the planned thickness at any point.
0.10 foot
When constructing industrial or commercial buildings, where should enforcement be placed in the walls and slab?
should not be placed any further apart than 3 times the wall or slab thickness or 18″
Tracks sinking until a dozer gets stuck is called:
High centered
What are the operating hours for type B warning lights?
24 hours per day
Crawler type bulldozers are reasonable economical on pushing distances up to ___ ft.
200 feet
Which type is required when using vitrified clay for building drains?
Extra strength
Spraying of untreated surface with a diluted slow-setting asphalt emulsion or a low-viscosity cutback is known as:
Dust laying
Initial rolling or tamping should be performed when the temperature of the mixture is such that the sum of the air temperature of the mixture is between?
300˚ - 375˚
Which type of warning light is high intensity ?
Type B
In grading, the place where the line of the fill intersects the natural grade or ground is known as the:
Berm
After utility locations are marked, whose responsibility is it to actually find them?
Contractor
