CHST Exam Prep: In-Depth Exam Prep And Verified
Solutions
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. Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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. Right Ans - 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 Right Ans - 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. Right Ans - 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. Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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. Right Ans - 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.
4) Seek shelter within a non-grounded non-metal building. Right Ans - 3)
Seek shelter within a grounded metal building.
Accidental contact with 60 hertz current of 5 to 25 milliamperes can cause
which of the following?
1) Death in most adults
2) Ventricular fibrillation
3) Harmless exposure
4) Paralysis Right Ans - 4) Paralysis
The major cause of fire-related deaths is attributed to:
1) Inhalation of smoke.
2) Seared lungs.
3) Carbon Monoxide.
4) Burn trauma. Right Ans - 3) Carbon Monoxide.
In the theory of fire extinguishment, all of the following are believed
appropriate, EXCEPT:
1) Extinguishment by cooling
2) Extinguishment by oxygen dilution
3) Extinguishment by fuel removal
4) Extinguishment by fire break Right Ans - 4) Extinguishment by fire
break
What is the most critical period in Crisis Management?
1) First 24 hours
2) First week
3) First month
4) First year Right Ans - 1) First 24 hours
What type of emergencies would you expect to find at a TSD site?
1) Those involving hazardous substances
2) Those involving trash or rubbish
3) Those dealing with fire and similar life threatening conditions
4) Those involving gas cylinders Right Ans - 1) Those involving hazardous
substances
Solutions
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. Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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. Right Ans - 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 Right Ans - 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. Right Ans - 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. Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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 Right Ans - 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. Right Ans - 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.
4) Seek shelter within a non-grounded non-metal building. Right Ans - 3)
Seek shelter within a grounded metal building.
Accidental contact with 60 hertz current of 5 to 25 milliamperes can cause
which of the following?
1) Death in most adults
2) Ventricular fibrillation
3) Harmless exposure
4) Paralysis Right Ans - 4) Paralysis
The major cause of fire-related deaths is attributed to:
1) Inhalation of smoke.
2) Seared lungs.
3) Carbon Monoxide.
4) Burn trauma. Right Ans - 3) Carbon Monoxide.
In the theory of fire extinguishment, all of the following are believed
appropriate, EXCEPT:
1) Extinguishment by cooling
2) Extinguishment by oxygen dilution
3) Extinguishment by fuel removal
4) Extinguishment by fire break Right Ans - 4) Extinguishment by fire
break
What is the most critical period in Crisis Management?
1) First 24 hours
2) First week
3) First month
4) First year Right Ans - 1) First 24 hours
What type of emergencies would you expect to find at a TSD site?
1) Those involving hazardous substances
2) Those involving trash or rubbish
3) Those dealing with fire and similar life threatening conditions
4) Those involving gas cylinders Right Ans - 1) Those involving hazardous
substances
