CONSTRUCTION HEALTH AND SAFETY
TECHNICIAN- CHST EXAM 2025 ACTUAL
EXAM WITH COMPLETE QUESTIONS AND
CORRECT ANSWERS RATED A+ AND
DETAILED RATIONALES LATEST UPDATE
Which of the following is the most correct concerning the OSHA
standards for loading of explosives or blasting agents?
A) The explosive cartridge should fit tightly into vertical drill holes
to prevent slippage
B) Tamping of explosive charges and primers shall be done with a
wood or plastic tamping pole without exposed metal or spark
producing parts
C) Drilling is not permitted within 100 feet of remaining butts of old
hoses if there is any suspicion of unexploded charges
D) Pickup trucks must not be operated within 50 feet of loaded
holes Correct Answer We selected answer D because:
According to OSHA at 1926.905 "Equipment shall not be
operated within 50 feet of loaded holes". Selection "A" is not
correct, drill holes should be large enough to freely admit the
insertion of explosive cartridges. Selection "B" is in error, primers
must never under any circumstance be tamped. In selection "C"
the required distance is 50 feet.
Which of the following provides the best protection when dealing
with hoisting and rigging equipment?
A) Chains, slings and ropes should be inspected before each job
B) Hoisting and lifting equipment should be inspected daily
C) A thorough inspection of all chains in use shall be made every
18 months
,D) The use of wire rope that has been birdcaged is permitted for
lifting if provided with crosby clamps every six inches Correct
Answer 1) We selected answer A because:
Inspection of hoisting and rigging equipment before each job
provides the greatest protection from use of defective equipment.
Selection "B" is a good practice, however not as protective as
choice "A". The frequency on selection "C" should be dependent
on use, however in no case more than 12 months. Selection "D"
is incorrect, bird-caged wire rope should be removed from
service.
1926.502(d)(21)
Personal fall arrest systems shall be inspected prior to each use
for wear, damage and other deterioration and defective
components shall be removed from service.
The OSHA regulation covering underground construction is
1926.800, which covers the construction of underground tunnels,
shafts, chambers and cut-and-cover excavations. According to
OSHA 1926.800 ventilation must be provided to maintain
underground air quality. How many cubic feet of fresh air is
required for each worker underground?
A) 400 ft3
B) 200 5 3
C) 50 ft3
D) 100 ft' Correct Answer We selected answer B because:
To prevent any dangerous or harmful accumulation of dusts,
fumes, mists, vapors, or gases OSHA 1926.800(k)(1)(ii)(2)
requires a minimum of 200 cubic feet of fresh air per minute to be
supplied for each employee underground.
,You are the safety engineer at a large construction site where an
excavation is made in Type A soil using a simple slope for
protection. The excavation will be open less than 24 hours and is
10 feet in depth. Which of the following best describes the
requirements of OSHA concerning the horizontal to vertical ratio
of the slope?
A) Maximum allowable slope is 1/2:1
B) Maximum allowable slope is 1‹:1
C) Maximum allowable slope is 1 1/2›:1
D) Maximum allowable slope is 3:1 Correct Answer We selected
answer A because:
OSHA 1926, Subpart P, Appendix B requires an excavation in
Type A soil that is open less than 24 hours and is 12 feet or less
in depth to have a maximum allowable slope of
An excavation is made in Type C soil using a simple slope for
protection.
The excavation will be open for greater than 36 hours and is 14
feet in depth. Which of the following best describes the
requirements of OSHA concerning the horizontal to vertical ratio
of the slope?
A) Maximum allowable slope is 1/2:1
B) Maximum allowable slope is 3/4: 1
C) Maximum allowable slope is 1 1/2:1
D) Maximum allowable slope is 3:1 Correct Answer We selected
answer C because:
OSHA 1926, Subpart P, Appendix B requires an excavation in
Type C soil that is 20 feet or less in depth to have a maximum
allowable slope of 1'Z:1.
The possibility of fire during construction operations is higher than
during regular occupancy. Accordingly, storage of flammable
, liquid materials is strictly controlled on a construction site. Which
of the
following best describes the correct safety practices concerning
storage of flammable/combustible liquids in a building under
construction.
A) Flammables stored inside not in an approved flammable
storage cabinet are limited to 10 gallons
B) Flammables stored inside not in an approved flammable
storage cabinet are limited to 25 gallons
C) Stairwell storage is limited to 60 gallons of flammables and 120
gallons of combustibles
D) Flammables cannot be stored on a construction site at any
time, combustibles are limited to 10 gallons or a one day supply
whichever is less Correct Answer We selected answer B
because:
According to OSHA at 1926.152 no more than 25 gallons of
flammable or combustible liquids can be stored inside without
being in an approved storage cabinet or in a room specifically
designed for the storage of flammables/combustibles. The
quantity is incorrect in selection "A".
Selection "C" incorrectly provides storage in stairwells, which is
expressly prohibited. Selection "D" is both unrealistic and
incorrect.
1910.1200(f)(5)
Except as provided in paragraphs (f)(6) and (f)(7) of this section,
the employer shall ensure that each container of hazardous
chemicals in the workplace is labeled, tagged or marked with the
following information:
Identity of the hazardous chemical(s) contained therein; and
appropriate hazard warnings, or alternatively, words, pictures,
symbols, or combination thereof, which provide at least general
information regarding the hazards of the chemicals, and which, in
TECHNICIAN- CHST EXAM 2025 ACTUAL
EXAM WITH COMPLETE QUESTIONS AND
CORRECT ANSWERS RATED A+ AND
DETAILED RATIONALES LATEST UPDATE
Which of the following is the most correct concerning the OSHA
standards for loading of explosives or blasting agents?
A) The explosive cartridge should fit tightly into vertical drill holes
to prevent slippage
B) Tamping of explosive charges and primers shall be done with a
wood or plastic tamping pole without exposed metal or spark
producing parts
C) Drilling is not permitted within 100 feet of remaining butts of old
hoses if there is any suspicion of unexploded charges
D) Pickup trucks must not be operated within 50 feet of loaded
holes Correct Answer We selected answer D because:
According to OSHA at 1926.905 "Equipment shall not be
operated within 50 feet of loaded holes". Selection "A" is not
correct, drill holes should be large enough to freely admit the
insertion of explosive cartridges. Selection "B" is in error, primers
must never under any circumstance be tamped. In selection "C"
the required distance is 50 feet.
Which of the following provides the best protection when dealing
with hoisting and rigging equipment?
A) Chains, slings and ropes should be inspected before each job
B) Hoisting and lifting equipment should be inspected daily
C) A thorough inspection of all chains in use shall be made every
18 months
,D) The use of wire rope that has been birdcaged is permitted for
lifting if provided with crosby clamps every six inches Correct
Answer 1) We selected answer A because:
Inspection of hoisting and rigging equipment before each job
provides the greatest protection from use of defective equipment.
Selection "B" is a good practice, however not as protective as
choice "A". The frequency on selection "C" should be dependent
on use, however in no case more than 12 months. Selection "D"
is incorrect, bird-caged wire rope should be removed from
service.
1926.502(d)(21)
Personal fall arrest systems shall be inspected prior to each use
for wear, damage and other deterioration and defective
components shall be removed from service.
The OSHA regulation covering underground construction is
1926.800, which covers the construction of underground tunnels,
shafts, chambers and cut-and-cover excavations. According to
OSHA 1926.800 ventilation must be provided to maintain
underground air quality. How many cubic feet of fresh air is
required for each worker underground?
A) 400 ft3
B) 200 5 3
C) 50 ft3
D) 100 ft' Correct Answer We selected answer B because:
To prevent any dangerous or harmful accumulation of dusts,
fumes, mists, vapors, or gases OSHA 1926.800(k)(1)(ii)(2)
requires a minimum of 200 cubic feet of fresh air per minute to be
supplied for each employee underground.
,You are the safety engineer at a large construction site where an
excavation is made in Type A soil using a simple slope for
protection. The excavation will be open less than 24 hours and is
10 feet in depth. Which of the following best describes the
requirements of OSHA concerning the horizontal to vertical ratio
of the slope?
A) Maximum allowable slope is 1/2:1
B) Maximum allowable slope is 1‹:1
C) Maximum allowable slope is 1 1/2›:1
D) Maximum allowable slope is 3:1 Correct Answer We selected
answer A because:
OSHA 1926, Subpart P, Appendix B requires an excavation in
Type A soil that is open less than 24 hours and is 12 feet or less
in depth to have a maximum allowable slope of
An excavation is made in Type C soil using a simple slope for
protection.
The excavation will be open for greater than 36 hours and is 14
feet in depth. Which of the following best describes the
requirements of OSHA concerning the horizontal to vertical ratio
of the slope?
A) Maximum allowable slope is 1/2:1
B) Maximum allowable slope is 3/4: 1
C) Maximum allowable slope is 1 1/2:1
D) Maximum allowable slope is 3:1 Correct Answer We selected
answer C because:
OSHA 1926, Subpart P, Appendix B requires an excavation in
Type C soil that is 20 feet or less in depth to have a maximum
allowable slope of 1'Z:1.
The possibility of fire during construction operations is higher than
during regular occupancy. Accordingly, storage of flammable
, liquid materials is strictly controlled on a construction site. Which
of the
following best describes the correct safety practices concerning
storage of flammable/combustible liquids in a building under
construction.
A) Flammables stored inside not in an approved flammable
storage cabinet are limited to 10 gallons
B) Flammables stored inside not in an approved flammable
storage cabinet are limited to 25 gallons
C) Stairwell storage is limited to 60 gallons of flammables and 120
gallons of combustibles
D) Flammables cannot be stored on a construction site at any
time, combustibles are limited to 10 gallons or a one day supply
whichever is less Correct Answer We selected answer B
because:
According to OSHA at 1926.152 no more than 25 gallons of
flammable or combustible liquids can be stored inside without
being in an approved storage cabinet or in a room specifically
designed for the storage of flammables/combustibles. The
quantity is incorrect in selection "A".
Selection "C" incorrectly provides storage in stairwells, which is
expressly prohibited. Selection "D" is both unrealistic and
incorrect.
1910.1200(f)(5)
Except as provided in paragraphs (f)(6) and (f)(7) of this section,
the employer shall ensure that each container of hazardous
chemicals in the workplace is labeled, tagged or marked with the
following information:
Identity of the hazardous chemical(s) contained therein; and
appropriate hazard warnings, or alternatively, words, pictures,
symbols, or combination thereof, which provide at least general
information regarding the hazards of the chemicals, and which, in
