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”