CHST - Exam Prep UPDATED
QUESTIONS and CORRECT Answers
The displacement of the atmosphere in a permit-required confined space by a non-combustible
gas to such an extent that the resulting atmosphere is non-combustible is called:
1)Inerting.
2)Stabilizing.
3)Venting.
4)Forced gas venting. - CORRECT ANSWER - 1)Inerting.
Drivers of any size vehicle which transports hazardous materials that require placarding must
pass the pre-trip skills and written test to obtain a:
1) Class I license.
2) Class II license.
3) CDL.
4) 1 or 2 above - CORRECT ANSWER - 3) CDL.
A truck driver transporting hazardous material must know which of the following?
1) Rest stops
2) Emergency Fist Aid
3) Nature of cargo
4) CPR - CORRECT ANSWER - 3) Nature of cargo
Common job risk factors for the development of Cumulative Trauma Disorder (CTD) include all
of the following EXCEPT:
1) Excessive force
2) Abnormal postures
3) Mechanical compression
4) Repetition - CORRECT ANSWER - 4) Repetition
,The definition of tensile strength on an object or of a material is:
1) The force which distorts it from its original shape.
2) The breaking strength when exposed to tensile force.
3) 1/4 of the sheer strength.
4) The sheer strength cubed. - CORRECT ANSWER - 2) The breaking strength when
exposed to tensile force.
Which part of the body is the main one involved in maintaining the body's heat balance?
1) Lungs
2) Heart
3) Skin
4) Hair - CORRECT ANSWER - 3) Skin
Acetylene can be described as:
1) Colorless gas with slight garlic-like odor.
2) Pungent, irritating greenish-yellow gas.
3) Faint yellow liquid.
4) White powder, chlorine-like odor. - CORRECT ANSWER - 1) Colorless gas with slight
garlic-like odor.
An instrument that detects a mixture of flammable vapors when air is passed over a heated
electric filament is called:
1) Wheatstone bridge.
2) Resistance bridge.
3) Combustible gas indicator.
4) Gas detector. - CORRECT ANSWER - 3) Combustible gas indicator.
,If water weighs 8.34 lb/gal, what work is required to move 300 gallons of water from a 400 ft.
deep mine?
1) 1,000,200 ft-lbs
2) 1,000,400 ft-lbs
3) 1,000,600 ft-lbs
4) 1,000,800 ft-lbs - CORRECT ANSWER - 4) 1,000,800 ft-lbs
Use the formula:
W=F*D
Where:
W = Work, F = Force, D = Distance
W = (8.34 * 300)(400) = 1,000,800 ft-lbs.
At a distance of 5 miles, an office building has an angle of elevation of 2°. Find the height of the
building.
1) 922 ft
2) 561 ft
3) 434 ft
4) 4,340 ft - CORRECT ANSWER - 1) 922 ft
Use the formula for Tangent:
Tan 2 = Opp / Adj
Tan 2 = x / 26400
x = Tan 2 * 26400
x = 922
How long is a stay wire of a smokestack if at a distance of 80 feet from the base it makes an
angle of 65° with the ground?
1) 163
, 2) 16.3
3) 18.9
4) 189 - CORRECT ANSWER - 4) 189
Use the Cosine Law formula:
Cos 65° = Adj / Hyp
Cos 65° = 80 / x
x = 80 / .4226 x = 189.3 ft
Which group of specially trained employees, who have been delegated by their employer, are
most qualified to respond to an emergency in which a drum of hazardous substance has been
ruptured?
1) Paramedics
2) Nurses
3) HAZMAT team
4) First aid team - CORRECT ANSWER - 3) HAZMAT team
If a SCBA is worn in an atmosphere that is immediately dangerous to life and health, the
employee must:
1) Wear a safety harness and lifeline.
2) Have a standby worker with a canister respirator.
3) Have an escape pack.
4) Not go into the area. - CORRECT ANSWER - 1) Wear a safety harness and lifeline.
What precaution should be taken during an electrical storm?
1) Stand by a tall tree.
2) Stand by a metal fence.
3) Seek shelter within a grounded metal building.
QUESTIONS and CORRECT Answers
The displacement of the atmosphere in a permit-required confined space by a non-combustible
gas to such an extent that the resulting atmosphere is non-combustible is called:
1)Inerting.
2)Stabilizing.
3)Venting.
4)Forced gas venting. - CORRECT ANSWER - 1)Inerting.
Drivers of any size vehicle which transports hazardous materials that require placarding must
pass the pre-trip skills and written test to obtain a:
1) Class I license.
2) Class II license.
3) CDL.
4) 1 or 2 above - CORRECT ANSWER - 3) CDL.
A truck driver transporting hazardous material must know which of the following?
1) Rest stops
2) Emergency Fist Aid
3) Nature of cargo
4) CPR - CORRECT ANSWER - 3) Nature of cargo
Common job risk factors for the development of Cumulative Trauma Disorder (CTD) include all
of the following EXCEPT:
1) Excessive force
2) Abnormal postures
3) Mechanical compression
4) Repetition - CORRECT ANSWER - 4) Repetition
,The definition of tensile strength on an object or of a material is:
1) The force which distorts it from its original shape.
2) The breaking strength when exposed to tensile force.
3) 1/4 of the sheer strength.
4) The sheer strength cubed. - CORRECT ANSWER - 2) The breaking strength when
exposed to tensile force.
Which part of the body is the main one involved in maintaining the body's heat balance?
1) Lungs
2) Heart
3) Skin
4) Hair - CORRECT ANSWER - 3) Skin
Acetylene can be described as:
1) Colorless gas with slight garlic-like odor.
2) Pungent, irritating greenish-yellow gas.
3) Faint yellow liquid.
4) White powder, chlorine-like odor. - CORRECT ANSWER - 1) Colorless gas with slight
garlic-like odor.
An instrument that detects a mixture of flammable vapors when air is passed over a heated
electric filament is called:
1) Wheatstone bridge.
2) Resistance bridge.
3) Combustible gas indicator.
4) Gas detector. - CORRECT ANSWER - 3) Combustible gas indicator.
,If water weighs 8.34 lb/gal, what work is required to move 300 gallons of water from a 400 ft.
deep mine?
1) 1,000,200 ft-lbs
2) 1,000,400 ft-lbs
3) 1,000,600 ft-lbs
4) 1,000,800 ft-lbs - CORRECT ANSWER - 4) 1,000,800 ft-lbs
Use the formula:
W=F*D
Where:
W = Work, F = Force, D = Distance
W = (8.34 * 300)(400) = 1,000,800 ft-lbs.
At a distance of 5 miles, an office building has an angle of elevation of 2°. Find the height of the
building.
1) 922 ft
2) 561 ft
3) 434 ft
4) 4,340 ft - CORRECT ANSWER - 1) 922 ft
Use the formula for Tangent:
Tan 2 = Opp / Adj
Tan 2 = x / 26400
x = Tan 2 * 26400
x = 922
How long is a stay wire of a smokestack if at a distance of 80 feet from the base it makes an
angle of 65° with the ground?
1) 163
, 2) 16.3
3) 18.9
4) 189 - CORRECT ANSWER - 4) 189
Use the Cosine Law formula:
Cos 65° = Adj / Hyp
Cos 65° = 80 / x
x = 80 / .4226 x = 189.3 ft
Which group of specially trained employees, who have been delegated by their employer, are
most qualified to respond to an emergency in which a drum of hazardous substance has been
ruptured?
1) Paramedics
2) Nurses
3) HAZMAT team
4) First aid team - CORRECT ANSWER - 3) HAZMAT team
If a SCBA is worn in an atmosphere that is immediately dangerous to life and health, the
employee must:
1) Wear a safety harness and lifeline.
2) Have a standby worker with a canister respirator.
3) Have an escape pack.
4) Not go into the area. - CORRECT ANSWER - 1) Wear a safety harness and lifeline.
What precaution should be taken during an electrical storm?
1) Stand by a tall tree.
2) Stand by a metal fence.
3) Seek shelter within a grounded metal building.
