CHST Exam Prep Questions and Answers With Verified Solutions 2025
Class I Standpipe - ✔✔For professional Fire Fighters. Hose is 2 1/2 inches in diameter. Typically found in
stairwells
Class II Standpipe - ✔✔Hose is 1 1/2 inches in diameter. For occupants in the building and intended for
all spaces in building. Typically found in cabinets and spaced according to the hose length.
Class III Standpipe - ✔✔Both firefighters and occupants. Adjusts to 1 1/2 or 2 1/2 in diameter.
How far from electrical power lines must a scaffold be? - ✔✔10 feet
The refuge area must have a fire-resistance rating of at least how much? - ✔✔Minimum one hour fire
resistance for walls protecting refuge area from inside of building
Standpipe System - ✔✔An arrangement of piping, valves, and hose connections installed in a structure
to deliver water for fire hoses.
Metal Fume Fever - ✔✔What results from the inhalation of fumes, like iron, nickel, copper, zinc. Often
results from welding without proper ventilation/respiratory protection. Resembles flu like symptoms
Symptoms of Metal Fume Fever - ✔✔Flu like symptoms such as headaches, fever, chills, muscle
aches/weakness, thirst, nausea, vomiting, chest pain, fatigue, stomachaches.
Employees who work with what substance(s) tend to have higher incidents of Metal Fume Fever? -
✔✔Zinc Oxide, Chromium (stainless steel), nickel, manganese, cobalt, lead, arsenic, copper platinum,
selenium, gold and silver
What can prevent Metal Fume Fever? - ✔✔local or exhaust ventilation and personal respirators
What are the safe operating procedures for utility and service lines PRIOR to demolitions? - ✔✔1.
Conduct survey report
, 2. Document specific hazards
3. Evaluate utility functions servicing the building
What utilities must be cut PRIOR to demolition? - ✔✔Electric, water, gas, sewer and any other service
What should the (preliminary) demolition survey report include? - ✔✔1. Whether there are dangers
posed to workers
2. Whether there are dangers posed to the environment
Ex: Chemicals, gases, explosives, flammables, or any other hazardous materials in storage tank(s)
When can materials be dropped through floor openings? - ✔✔1. When the drop area is completely
enclosed and barricaded.
What requirements must barricades meet before material can be dropped through floor openings? -
✔✔Barricades must be at least 42 inches high and no closer to the drop area than 6 feet.
At what height must a chute be used when removing waste from upper levels of buildings? - ✔✔20 feet
What requirements must chutes meet when they are used to remove waste from upper levels of a
building? - ✔✔Must be made from wood or alloyed metal. Chutes must be securely anchored.
Should glass windows be removed PRIOR to demolition? - ✔✔Yes, when there is a concern regarding
workers exposed to broken glass.
What is an exit discharge? - ✔✔An exit discharge leads directly to an outdoor area or street
What is an exit route? - ✔✔An exit route DOES NOT NECESSARILY lead out into an open area, yard or
street. Exit routes often lead to refuge areas.
Class I Standpipe - ✔✔For professional Fire Fighters. Hose is 2 1/2 inches in diameter. Typically found in
stairwells
Class II Standpipe - ✔✔Hose is 1 1/2 inches in diameter. For occupants in the building and intended for
all spaces in building. Typically found in cabinets and spaced according to the hose length.
Class III Standpipe - ✔✔Both firefighters and occupants. Adjusts to 1 1/2 or 2 1/2 in diameter.
How far from electrical power lines must a scaffold be? - ✔✔10 feet
The refuge area must have a fire-resistance rating of at least how much? - ✔✔Minimum one hour fire
resistance for walls protecting refuge area from inside of building
Standpipe System - ✔✔An arrangement of piping, valves, and hose connections installed in a structure
to deliver water for fire hoses.
Metal Fume Fever - ✔✔What results from the inhalation of fumes, like iron, nickel, copper, zinc. Often
results from welding without proper ventilation/respiratory protection. Resembles flu like symptoms
Symptoms of Metal Fume Fever - ✔✔Flu like symptoms such as headaches, fever, chills, muscle
aches/weakness, thirst, nausea, vomiting, chest pain, fatigue, stomachaches.
Employees who work with what substance(s) tend to have higher incidents of Metal Fume Fever? -
✔✔Zinc Oxide, Chromium (stainless steel), nickel, manganese, cobalt, lead, arsenic, copper platinum,
selenium, gold and silver
What can prevent Metal Fume Fever? - ✔✔local or exhaust ventilation and personal respirators
What are the safe operating procedures for utility and service lines PRIOR to demolitions? - ✔✔1.
Conduct survey report
, 2. Document specific hazards
3. Evaluate utility functions servicing the building
What utilities must be cut PRIOR to demolition? - ✔✔Electric, water, gas, sewer and any other service
What should the (preliminary) demolition survey report include? - ✔✔1. Whether there are dangers
posed to workers
2. Whether there are dangers posed to the environment
Ex: Chemicals, gases, explosives, flammables, or any other hazardous materials in storage tank(s)
When can materials be dropped through floor openings? - ✔✔1. When the drop area is completely
enclosed and barricaded.
What requirements must barricades meet before material can be dropped through floor openings? -
✔✔Barricades must be at least 42 inches high and no closer to the drop area than 6 feet.
At what height must a chute be used when removing waste from upper levels of buildings? - ✔✔20 feet
What requirements must chutes meet when they are used to remove waste from upper levels of a
building? - ✔✔Must be made from wood or alloyed metal. Chutes must be securely anchored.
Should glass windows be removed PRIOR to demolition? - ✔✔Yes, when there is a concern regarding
workers exposed to broken glass.
What is an exit discharge? - ✔✔An exit discharge leads directly to an outdoor area or street
What is an exit route? - ✔✔An exit route DOES NOT NECESSARILY lead out into an open area, yard or
street. Exit routes often lead to refuge areas.
