CHST Exam Prep Questions with Complete
Answers
Class I Standpipe - ANSWER For professional Fire Fighters. Hose is 2 1/2 inches in diameter.
Typically found in stairwells
Class II Standpipe - ANSWER 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 - ANSWER 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? - ANSWER 10 feet
The refuge area must have a fire-resistance rating of at least how much? - ANSWER Minimum
one hour fire resistance for walls protecting refuge area from inside of building
Standpipe System - ANSWER An arrangement of piping, valves, and hose connections installed
in a structure to deliver water for fire hoses.
Metal Fume Fever - ANSWER 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 - ANSWER 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? - ANSWER Zinc Oxide, Chromium (stainless steel), nickel, manganese, cobalt, lead,
arsenic, copper platinum, selenium, gold and silver
, What can prevent Metal Fume Fever? - ANSWER local or exhaust ventilation and personal
respirators
What are the safe operating procedures for utility and service lines PRIOR to demolitions? -
ANSWER 1. Conduct survey report
2. Document specific hazards
3. Evaluate utility functions servicing the building
What utilities must be cut PRIOR to demolition? - ANSWER Electric, water, gas, sewer and any
other service
What should the (preliminary) demolition survey report include? - ANSWER 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? - ANSWER 1. When the drop area is
completely enclosed and barricaded.
What requirements must barricades meet before material can be dropped through floor
openings? - ANSWER 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? -
ANSWER 20 feet
Answers
Class I Standpipe - ANSWER For professional Fire Fighters. Hose is 2 1/2 inches in diameter.
Typically found in stairwells
Class II Standpipe - ANSWER 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 - ANSWER 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? - ANSWER 10 feet
The refuge area must have a fire-resistance rating of at least how much? - ANSWER Minimum
one hour fire resistance for walls protecting refuge area from inside of building
Standpipe System - ANSWER An arrangement of piping, valves, and hose connections installed
in a structure to deliver water for fire hoses.
Metal Fume Fever - ANSWER 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 - ANSWER 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? - ANSWER Zinc Oxide, Chromium (stainless steel), nickel, manganese, cobalt, lead,
arsenic, copper platinum, selenium, gold and silver
, What can prevent Metal Fume Fever? - ANSWER local or exhaust ventilation and personal
respirators
What are the safe operating procedures for utility and service lines PRIOR to demolitions? -
ANSWER 1. Conduct survey report
2. Document specific hazards
3. Evaluate utility functions servicing the building
What utilities must be cut PRIOR to demolition? - ANSWER Electric, water, gas, sewer and any
other service
What should the (preliminary) demolition survey report include? - ANSWER 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? - ANSWER 1. When the drop area is
completely enclosed and barricaded.
What requirements must barricades meet before material can be dropped through floor
openings? - ANSWER 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? -
ANSWER 20 feet
