CHST Exam Prep 1: Questions And Accurate Answers
Personal protective equipment is very important during welding and cutting
operations. Which of the following statements is most correct concerning the
proper shade of filter lens to use during welding and cutting operations?
a. generally it is best to pick up a #2 lens (dark) and work up, this allows
compensation for individual differences.
b. heavy gas cutting would require a number 6 to 8 shade lens
c. heavy gas cutting would require a number 14 to 16 shade lens
d. as a rule of thumb, it is generally best to start with a lens that gives a clear
view of the weld zone and then move up. Right Ans - B Explanation:
Proper eye protection is among the most important safety precautions
welders and metal cutters can take. The proper shade protection is very
important to guard against the damage caused by UV and IR radiation created
during these operations. The table shown here was taken directly from the
OSHA standards. Additional information is contained in ANSFASC Z49.1-88.
Which of the following fire fighting agents has proven to be the most effective
in combating Class B fires?
A) Foam, CO2. Dry Powder
B) AFFF, Halon, Dry Chemical
C) Halon, Water, Dry Chemical
D) Foam, CO2. Dry Chemical Right Ans - D Explanation:
the most effective agents for Class B fires involving flammable liquids are
Foam, CO2. and Dry Chemical.
Complete the following statement. A bench grinder should have the tool rest
adjusted to within inch of the wheel, and the tongue guard should be adjusted
to within inch of the wheel.
A) 1/2 inch - 1/2 inch
B) 1/4 inch - 1/8 inch
C) 1/8 inch'- 1/4 inch
D) 1/16 inch - 1/4 inch Right Ans - C Explanation:
According to the National Safety Council's "Accident Prevention Manual for
Industrial Operations." Tool rests should be adjusted to not more than 1/8
inch from the grinding wheel, tongue
,guards should be adjusted to 1/4 inch.
According to the OSHA standards, which of the following statements is most
correct concerning the use of power-operated tools in a construction
environment?
A) Powder-actuated tools must be tested for defects in accordance with
manufacturer's recommendations weekly, the test must be recorded and
available for inspection
B) Airless spray guns above 100 psi must be equipped with a manual safety
for operator safety
C) Compressed air must be reduced to 30 psi for concrete form cleaning
D) Compressed air hoses with a one half inch inside diameter or greater must
have a safety device at the source of supply air to reduce pressure in the event
of hose failure Right Ans - D Explanation:
Selection "A" is incorrect because OSHA requires powder-actuated tools to be
inspected each day before loading (1926.302). Selection "B" should read 1000
psi to be accurate. Selection "C" is not correct because OSHA exempts concrete
form cleaning from the 30 psi limitation.
The following code is found on your safety shoes, what does the "FI/75"
indicate?
ANSI Z41 PT 91 FF75 C/75 MT/75 Cd 1 EH
PR
A) female with an impact rating of 75 ft-lbs
B) fire resistant with an impact rating of 75 ft-lbs
C) flame proof with an impact rating of 75 ft-lbs
D) size in metrics Right Ans - A Explanation:
The protective identification ANSI code will be legible (printed, stitched, etc.)
on one shoe of each pair. The following is an example of an ANSI code on a
piece of protective footwear:
ANSI Z41 PT 91 FI/75 C/75 MT/75 Cd 1 EH
PR
Line #1: ANSI Z41 PT91. This line identifies the ANSI Z41 standard. The letters
PT indicates the protective section of the standard. This is followed by the last
two digits of the year of the standard with which the footwear meets
compliance (1991)
,Line #2: FI/75 C/75 MT/75. This line identifies the applicable gender (M or F)
for which the footwear is intended. It also identifies the existence of impact
resistance (I), the impact resistance rating (75, 50, or 30 foot- pounds). This
line can also include a metatarsal protection designation (MT) and rating (75,
50, or 30 foot-pounds).
Lines #3 & 4: Cd 1 EH; PR. This area of the label designates conductive
properties (Cd) and type (1 or 2), electrical hazard (EH) and puncture
resistance (PR), if applicable.
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 Right
Ans - D Explanation:
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 Right Ans - 1) A
Explanation:
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' Right Ans - B Explanation:
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 Right Ans - A Explanation:
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.
Personal protective equipment is very important during welding and cutting
operations. Which of the following statements is most correct concerning the
proper shade of filter lens to use during welding and cutting operations?
a. generally it is best to pick up a #2 lens (dark) and work up, this allows
compensation for individual differences.
b. heavy gas cutting would require a number 6 to 8 shade lens
c. heavy gas cutting would require a number 14 to 16 shade lens
d. as a rule of thumb, it is generally best to start with a lens that gives a clear
view of the weld zone and then move up. Right Ans - B Explanation:
Proper eye protection is among the most important safety precautions
welders and metal cutters can take. The proper shade protection is very
important to guard against the damage caused by UV and IR radiation created
during these operations. The table shown here was taken directly from the
OSHA standards. Additional information is contained in ANSFASC Z49.1-88.
Which of the following fire fighting agents has proven to be the most effective
in combating Class B fires?
A) Foam, CO2. Dry Powder
B) AFFF, Halon, Dry Chemical
C) Halon, Water, Dry Chemical
D) Foam, CO2. Dry Chemical Right Ans - D Explanation:
the most effective agents for Class B fires involving flammable liquids are
Foam, CO2. and Dry Chemical.
Complete the following statement. A bench grinder should have the tool rest
adjusted to within inch of the wheel, and the tongue guard should be adjusted
to within inch of the wheel.
A) 1/2 inch - 1/2 inch
B) 1/4 inch - 1/8 inch
C) 1/8 inch'- 1/4 inch
D) 1/16 inch - 1/4 inch Right Ans - C Explanation:
According to the National Safety Council's "Accident Prevention Manual for
Industrial Operations." Tool rests should be adjusted to not more than 1/8
inch from the grinding wheel, tongue
,guards should be adjusted to 1/4 inch.
According to the OSHA standards, which of the following statements is most
correct concerning the use of power-operated tools in a construction
environment?
A) Powder-actuated tools must be tested for defects in accordance with
manufacturer's recommendations weekly, the test must be recorded and
available for inspection
B) Airless spray guns above 100 psi must be equipped with a manual safety
for operator safety
C) Compressed air must be reduced to 30 psi for concrete form cleaning
D) Compressed air hoses with a one half inch inside diameter or greater must
have a safety device at the source of supply air to reduce pressure in the event
of hose failure Right Ans - D Explanation:
Selection "A" is incorrect because OSHA requires powder-actuated tools to be
inspected each day before loading (1926.302). Selection "B" should read 1000
psi to be accurate. Selection "C" is not correct because OSHA exempts concrete
form cleaning from the 30 psi limitation.
The following code is found on your safety shoes, what does the "FI/75"
indicate?
ANSI Z41 PT 91 FF75 C/75 MT/75 Cd 1 EH
PR
A) female with an impact rating of 75 ft-lbs
B) fire resistant with an impact rating of 75 ft-lbs
C) flame proof with an impact rating of 75 ft-lbs
D) size in metrics Right Ans - A Explanation:
The protective identification ANSI code will be legible (printed, stitched, etc.)
on one shoe of each pair. The following is an example of an ANSI code on a
piece of protective footwear:
ANSI Z41 PT 91 FI/75 C/75 MT/75 Cd 1 EH
PR
Line #1: ANSI Z41 PT91. This line identifies the ANSI Z41 standard. The letters
PT indicates the protective section of the standard. This is followed by the last
two digits of the year of the standard with which the footwear meets
compliance (1991)
,Line #2: FI/75 C/75 MT/75. This line identifies the applicable gender (M or F)
for which the footwear is intended. It also identifies the existence of impact
resistance (I), the impact resistance rating (75, 50, or 30 foot- pounds). This
line can also include a metatarsal protection designation (MT) and rating (75,
50, or 30 foot-pounds).
Lines #3 & 4: Cd 1 EH; PR. This area of the label designates conductive
properties (Cd) and type (1 or 2), electrical hazard (EH) and puncture
resistance (PR), if applicable.
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 Right
Ans - D Explanation:
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 Right Ans - 1) A
Explanation:
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' Right Ans - B Explanation:
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 Right Ans - A Explanation:
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.
