Page 1 of 167
CHST EXAM AND STUDY GUIDE ALL 300 QUESTIONS
AND CORRECT DETAILED RATIONALESED SOLUTIONS
LATEST UPDATE JUST RELEASED THIS YEAR
Question: 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.
, Page 2 of 167
Question: 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.
, Page 3 of 167
Question: 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.
Question: 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?
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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
Question: 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:
CHST EXAM AND STUDY GUIDE ALL 300 QUESTIONS
AND CORRECT DETAILED RATIONALESED SOLUTIONS
LATEST UPDATE JUST RELEASED THIS YEAR
Question: 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.
, Page 2 of 167
Question: 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.
, Page 3 of 167
Question: 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.
Question: 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?
, Page 4 of 167
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
Question: 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:
