AL SW Sitework Contractor Exam
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
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1. What is the primary purpose of site grading before construction
begins?
a. To increase the building's floor area
b. To eliminate the need for drainage systems
c. To establish proper elevations and control surface water
d. To reduce the amount of surveying required
Rationale: Site grading establishes the required elevations and slopes
for the project. Proper grading directs stormwater away from
structures and toward approved drainage facilities while creating the
design contours required for roads, foundations, and other
improvements.
, 2. Which instrument is commonly used to determine differences in
elevation on a construction site?
a. Steel tape
b. Plumb bob
c. Compass
d. Level or laser level
Rationale: A level or laser level is designed to establish horizontal
reference lines and determine elevation differences. Accurate
elevation control is essential for grading, drainage, utilities, and
foundation preparation.
3. What does the term "cut" mean in earthwork?
a. Placement of imported fill
b. Removal of existing soil or material to reach a required elevation
c. Compaction of soil above grade
d. Installation of underground utilities
Rationale: A cut occurs when material is excavated or removed
because the existing ground is higher than the planned grade. Cut
quantities are normally balanced against fill quantities during
earthwork planning.
4. What does "fill" refer to in sitework?
,a. Removal of unsuitable soil
b. Installation of drainage pipe
c. Placement of material to raise an area to the required elevation
d. Removal of vegetation only
Rationale: Fill is placed where existing ground is below the required
design elevation. Fill material normally must be placed in controlled
lifts and compacted to achieve the specified density.
5. Why is topsoil generally stripped from areas that will support
structures or pavement?
a. Topsoil is always too hard to excavate
b. Topsoil contains excessive gravel
c. Topsoil contains organic material that can decompose and cause
settlement
d. Topsoil cannot absorb water
Rationale: Topsoil commonly contains roots, organic matter, and
other materials that are unsuitable for structural support. Removing it
helps provide a stable subgrade for foundations, pavements, and
engineered fills.
6. What is the purpose of soil compaction?
, a. To increase the organic content of soil
b. To make soil permanently waterproof
c. To increase soil density and improve its load-bearing characteristics
d. To eliminate the need for drainage
Rationale: Compaction reduces air voids within soil and increases its
density. Properly compacted soil generally provides better strength,
stability, and resistance to excessive settlement.
7. Which equipment is commonly used for compacting granular soil?
a. Backhoe bucket
b. Water truck only
c. Vibratory roller
d. Concrete saw
Rationale: Vibratory rollers are particularly effective on granular
materials because vibration helps rearrange particles into a denser
configuration. Different soils require different compaction equipment.
8. What is a lift in earthwork construction?
a. The height of a crane
b. The capacity of a dump truck
c. A controlled thickness of soil placed before compaction
d. The vertical distance between two buildings
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
1. What is the primary purpose of site grading before construction
begins?
a. To increase the building's floor area
b. To eliminate the need for drainage systems
c. To establish proper elevations and control surface water
d. To reduce the amount of surveying required
Rationale: Site grading establishes the required elevations and slopes
for the project. Proper grading directs stormwater away from
structures and toward approved drainage facilities while creating the
design contours required for roads, foundations, and other
improvements.
, 2. Which instrument is commonly used to determine differences in
elevation on a construction site?
a. Steel tape
b. Plumb bob
c. Compass
d. Level or laser level
Rationale: A level or laser level is designed to establish horizontal
reference lines and determine elevation differences. Accurate
elevation control is essential for grading, drainage, utilities, and
foundation preparation.
3. What does the term "cut" mean in earthwork?
a. Placement of imported fill
b. Removal of existing soil or material to reach a required elevation
c. Compaction of soil above grade
d. Installation of underground utilities
Rationale: A cut occurs when material is excavated or removed
because the existing ground is higher than the planned grade. Cut
quantities are normally balanced against fill quantities during
earthwork planning.
4. What does "fill" refer to in sitework?
,a. Removal of unsuitable soil
b. Installation of drainage pipe
c. Placement of material to raise an area to the required elevation
d. Removal of vegetation only
Rationale: Fill is placed where existing ground is below the required
design elevation. Fill material normally must be placed in controlled
lifts and compacted to achieve the specified density.
5. Why is topsoil generally stripped from areas that will support
structures or pavement?
a. Topsoil is always too hard to excavate
b. Topsoil contains excessive gravel
c. Topsoil contains organic material that can decompose and cause
settlement
d. Topsoil cannot absorb water
Rationale: Topsoil commonly contains roots, organic matter, and
other materials that are unsuitable for structural support. Removing it
helps provide a stable subgrade for foundations, pavements, and
engineered fills.
6. What is the purpose of soil compaction?
, a. To increase the organic content of soil
b. To make soil permanently waterproof
c. To increase soil density and improve its load-bearing characteristics
d. To eliminate the need for drainage
Rationale: Compaction reduces air voids within soil and increases its
density. Properly compacted soil generally provides better strength,
stability, and resistance to excessive settlement.
7. Which equipment is commonly used for compacting granular soil?
a. Backhoe bucket
b. Water truck only
c. Vibratory roller
d. Concrete saw
Rationale: Vibratory rollers are particularly effective on granular
materials because vibration helps rearrange particles into a denser
configuration. Different soils require different compaction equipment.
8. What is a lift in earthwork construction?
a. The height of a crane
b. The capacity of a dump truck
c. A controlled thickness of soil placed before compaction
d. The vertical distance between two buildings
