CM 3503 Exam 3 Questions and All
Correct Answers.
The organization within the Department of Labor (DOL) that is authorized to conduct job-site
inspection is the - Answer Occupational Safety Health Administration
The OSHA standards for excavation that employers are required to follow are found in 29 CFR
1926 ________ - Answer Subpart P
OSHA's 1926 Subpart P applies to all open ________ made in the earth's surface. Excavations
are defined to include ________ - Answer Excavations : Trenches
A competent person is one who is capable of identifying existing and predictable ________ in
the surroundings, or working conditions which are dangerous, hazardous, or ________ to
employees, and who has ________ to take prompt ________ measures to ________ them -
Answer hazards
unsanitary
authorization
corrective
eliminate
What does OSHA stand for? - Answer Occupational Safety and Health Administration
Who is the main federal agency charged with the enforcement of safety and health legislation -
Answer OSHA
According to OSHA, a trench is a narrow excavation that is no greater than 10 ft. at its base -
Answer False, 15 ft.
OSHA does not enforce any violation on an excavation that is less than 5ft. - Answer False,
OSHA standards enforce all excavation regardless of depth. However, no protective system is
required for excavation that is less than 5ft. Deep.
The most likely person to act as a competent person are supervisors and excavator operators. -
Answer true
Trenchless technology is covered by OSHA standard - Answer false
, The employer shall instruct each employee in the recognition and avoidance of unsafe
conditions and the regulations applicable to his work environment to control or eliminate any
hazards or other exposures to illness or injury - Answer Employer responsibilities:
training in soil analysis, protective systems, and OSHA standards - Answer For competent
person:
training in recognition and avoidance of hazards to avoid unsafe conditions - Answer For
excavation workers:
Does a rock remain stable when it is excavated?
(3) - Answer Difficulty in excavating rock does not mean it is stable
Drilling, blasting, and grinding destabilize rock
Competent person should inspect rock for fissure, cracks, and loose materials
Cohesive soils seems stable when excavated buy - Answer Claim more lives as all other soils
due to cave-in
Water and moisture content has an - Answer enormous effect on soil stability.
Upward seepage can become large enough to cause - Answer effective stress to drop to zero.
Cohesive strength is mostly present in clay - Answer true
Strength of soil decreases with the increase of water content - Answer true
Heaving is caused by artesian condition in the groundwater table - Answer False - Heaving is
caused by the downward pressure caused by the weight of adjacent soil
Detection of artesian condition is critical to avoid boiling condition in the excavation - Answer
true
The increase of the depth of excavation increases the chance of boiling condition - Answer
true
Soil classification shall be made by any worker at the site - Answer False, it should be
conducted by a competent person using manual and field tests.
Correct Answers.
The organization within the Department of Labor (DOL) that is authorized to conduct job-site
inspection is the - Answer Occupational Safety Health Administration
The OSHA standards for excavation that employers are required to follow are found in 29 CFR
1926 ________ - Answer Subpart P
OSHA's 1926 Subpart P applies to all open ________ made in the earth's surface. Excavations
are defined to include ________ - Answer Excavations : Trenches
A competent person is one who is capable of identifying existing and predictable ________ in
the surroundings, or working conditions which are dangerous, hazardous, or ________ to
employees, and who has ________ to take prompt ________ measures to ________ them -
Answer hazards
unsanitary
authorization
corrective
eliminate
What does OSHA stand for? - Answer Occupational Safety and Health Administration
Who is the main federal agency charged with the enforcement of safety and health legislation -
Answer OSHA
According to OSHA, a trench is a narrow excavation that is no greater than 10 ft. at its base -
Answer False, 15 ft.
OSHA does not enforce any violation on an excavation that is less than 5ft. - Answer False,
OSHA standards enforce all excavation regardless of depth. However, no protective system is
required for excavation that is less than 5ft. Deep.
The most likely person to act as a competent person are supervisors and excavator operators. -
Answer true
Trenchless technology is covered by OSHA standard - Answer false
, The employer shall instruct each employee in the recognition and avoidance of unsafe
conditions and the regulations applicable to his work environment to control or eliminate any
hazards or other exposures to illness or injury - Answer Employer responsibilities:
training in soil analysis, protective systems, and OSHA standards - Answer For competent
person:
training in recognition and avoidance of hazards to avoid unsafe conditions - Answer For
excavation workers:
Does a rock remain stable when it is excavated?
(3) - Answer Difficulty in excavating rock does not mean it is stable
Drilling, blasting, and grinding destabilize rock
Competent person should inspect rock for fissure, cracks, and loose materials
Cohesive soils seems stable when excavated buy - Answer Claim more lives as all other soils
due to cave-in
Water and moisture content has an - Answer enormous effect on soil stability.
Upward seepage can become large enough to cause - Answer effective stress to drop to zero.
Cohesive strength is mostly present in clay - Answer true
Strength of soil decreases with the increase of water content - Answer true
Heaving is caused by artesian condition in the groundwater table - Answer False - Heaving is
caused by the downward pressure caused by the weight of adjacent soil
Detection of artesian condition is critical to avoid boiling condition in the excavation - Answer
true
The increase of the depth of excavation increases the chance of boiling condition - Answer
true
Soil classification shall be made by any worker at the site - Answer False, it should be
conducted by a competent person using manual and field tests.
