Class I StandpipeFor professional Fire Fighters. Hose is 2 1/2 inches in diameter. Typically
found in stairwells
Class II StandpipeHose 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...
CHST - Exam Prep
Questions and Answers
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.
What is an occupant lead number?✅✅The maximum number of persons who may be
accommodated by the emergency exit routes and plans
What are the four types of standpipe systems?✅✅1. Small hose system
2. Class I
3. Class II
4. Class III
What is a small hose system?✅✅Designed for occupant use. No more than 1.5 inch diameter of
hose. Helpful in controlling initial stages of fire(s).
What is dilution ventilation?✅✅Less costly method of raising air quality up to permissible
levels. Adds clean air to contaminated air inside a building/rooms typically through intake fans
from doors or windows. Requires constant monitoring. Effective IF air contaminates not far
above PELs.
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