Safety Exam 2 Questions And Answers Well Elaborated.

Closed container - correct answers A container so sealed by means of a lid or other device that neither liquid nor vapor will escape from it at ordinary temperatures Combustible liquids - correct answers Any liquid having a flash point at or above 140 F. (60 C.), and below 200 F (93.40 C). Flammable - correct answers Capable of being easily ignited, burning intensely, or having a rapid rate of flame spread Flash point - correct answers The temperature at which it gives off sufficient to form an ignitable mixture with the air near the surface of the liquid or within the vessel used as determined by appropriate test procedure and apparatus Flammable liquids - correct answers Any liquid having a flashpoint below 140 F. and having a vapor pressure not exceeding 40 pounds per square in inch (absolute) at 100 F. OSHA rules for portable firefighting equipment - correct answers Fire extinguishers and small hose lines - (A fire extinguisher, rated not less than 2A, shall be provided for every 3,000 square feet of the protected building area, or major fraction thereof. Travel distance from any point of the protected area to the nearest fire extinguisher shall not exceed 100 feet!!!!!!!) Types of Fires - correct answers -Class A- Ordinary materials such as paper, wood, cloth -Class B- Flammable liquids or Combustible liquids such as gasoline, paint, thinners, propane, kerosene -Class C- Electrical equipment fires, appliances, switches, panels -Class D- Certain metals such as magnesium, sodium, that could explode! Many extinguishers are A, B, and C type Fire protection and prevention - correct answers Extinguishers and water drums, subject to freezing, shall be protected from freezing Fire extinguishers outside - correct answers Should be mounted within 75 feet of outside areas containing flammable liquids Fire extinguishers inside - correct answers Mounted within 10 feet of any inside storage area for such materials Fire extinguisher service - correct answers Fire extinguishers must be serviced, maintained, and tagged at least once a year How to Use a Fire Extinguisher - P-A-S-S Method - correct answers Pull -- Pull the pin at the top of the extinguisher that keeps the handle from being activated Aim -- Aim the nozzle at the base of the fire Squeeze -- Maintain a distance of eight to ten feet away from the fire and squeeze the handle. Discharge will only occur if the handle is being squeezed. Sweep -- Sweep the nozzle back and forth at the base of the fire until it appears to be out. PASS Approved containers and portable tanks - correct answers Only approved containers and portable tanks shall be used for storage and handling of flammable and combustible liquids - Approved safety cans or Department of Transportation approved containers shall be used for the handling and use of flammable liquids in quantities of 5 GALLONS or less!!! *Hard to pour liquids may be used and handled in original shipping containers* -For quantities of one gallon or less, the original container may be used, for storage, use and handling of flammable liquids Safety can - correct answers An approved closed container, of no more than 5 gallons capacity it will have: -a flash-arresting screen -spring-closing lid -spout cover so that it will safely relieve internal pressure when subjected to fire exposure Indoor storage - correct answers No more than 25 gallons of flammable liquids shall be stored in a room outside of an approved storage cabinet Storage cabinets will all have these words printed on them - correct answers "FLAMMABLE KEEP FIRE AWAY" Storage cabinet rules and regulations - correct answers -No more than 60 gallons of flammable or 120 gallons of combustible liquids shall be stored in any one storage cabinet -Not more than three such cabinets may be located in a single storage area -Quantities in excess of this shall be stored in an inside storage room The quantity of flammable or combustible liquid that may kept outside of a storage room or cabinet inside the building shall not exceed - correct answers -25 gallons of Class IA liquids in containers -120 gallons of Class IB, IC, II, III liquids in containers -660 gallons of Class IB, IC, II, III liquids in a single portable tank Inside Storage Rooms - Rules - correct answers •Shall be of fire resistant construction •Liquid tight were the walls join the floor •Have approved self closing doors at all openings •At least 4" sills, ramps, or depressed floors or open integrated trench which drains to safe location •A ventilation system that provides at least six room changes / hour •For Class I liquids, electrical wiring approved for hazardous locations •Explosion resistant lighting fixtures •Wood at least 1 inch nominal thickness for shelving, racks, dunnage, scuffboards, floor overlay, and similar installations Transfer of flammable liquids - correct answers Transfer of flammable liquids from one container to another shall be done only when containers are electrically interconnected (bonded) AKA GROUNDED!!! Compressed Gas Cylinders - correct answers -Cylinder valves must be protected at all times -Cylinders should be stored in an upright and secure position -The tilt and roll method is accepted practice for movement, never attempt to hoist with chokers -Valve caps must be secure any time the cylinder is not in use -When stored, compressed cylinders should be segregated. The required separation is 20' or a five foot high fire wall with an approved fire-resistance rating Welding-Cutting-Burning - correct answers -Extinguishing equipment should be located in an obvious place and be easy to reach -Remove all flammable materials within a 35 ft radius -Remove all combustible materials within a 50 ft radius -Remove all explosive materials within a 100 ft radius Cardboard - correct answers Most common combustible material, as well as wood, paper, etc. ________ - correct answers ________ #1 fear in trenching - correct answers Cave-ins (76% of fatalities) Most trenching accidents occur in what depths - correct answers 5-15ft deep Cube of soil weight - correct answers A cube of soil measuring 1 ft. on a side weighs at least 100 lb (more in many cases). A cubic yard of soil (3 ft. on a side) contains 27 of these, or 2,700 lbs. total. Excavation vs Trench - correct answers Excavation - any man cut, cavity, trench, etc., formed by earth removal. Excavations can include a building basement, roadbed or trench. Trench - narrow underground excavation that is deeper than it is wide and no wider than 15 feet. *All trenches are excavations, but not all excavations are trenches. Trenches are usually more dangerous. ________ Not on quiz I don't think, but important Shield - a structure able to withstand a cave-in and protect employees Shoring - a structure that supports the sides of an excavation and protects against cave-ins Sloping - a technique that employs a specific angle of incline on the sides of the excavation. The angle varies based on assessment of impacting site factors. Competent person - One who can identify existing and predictable hazards in the surroundings, or unsanitary, hazardous, or dangerous working conditions, and who has the authority to stop work until they are fixed. Before starting work and before you dig - correct answers CALL 811 Four-foot rule - correct answers OSHA requires that workers have a means to get in and out of a trench if it is FOUR or more feet deep