G-22 FDNY Questions and Answers Already Passed

G-22 FDNY Questions and Answers Already Passed Amounts of LPG & CNG where permit is required 16.4 oz and 8.7 SCF Portable LPG AND CNG containers with a capacity greater than 16.4 oz 8.7 SCF CANNOT be stored where? Indoors What temperature can cause pressure inside a container to increase to an unsafe level? 125°F What must be used to shield containers that are exposed to hot air blown by a heating appliance? A protective partition Control Valve On top of each container. Controls the discharge of the contents of the container. Must be opened by hand Hoses Should be as short as possible Cannot exceed 30 feet When used inside the hose cannot pass through any partitions/floors/walls/ceilings The use of nonmetallic pipe tubing or hose for permanently interconnecting containers is prohibited If containers need to be moved between floors Use an elevator if possible When can containers be transported in vehicles? When they are approved vehicles When the quantity of gas is less than 400 SCF Containers should be kept away from Sources of ignition Extreme temps Corrosives Falling objects Public tampering Places where it may fall Which liquids are considered LPG Propane (most common) Propylene Butane (most common) Butylene LPG is naturally Colorless and Odorless What odor allows you to detect an LPG leak? Rotten eggs When is the use of LPG in liquid form not prohibited? Hot air balloon operations LPG is usually stored as what and why? A liquid. Because when the liquid turns to a gas it expands to 269 times its original volume What does the expansion rate of LPG cause? To be a much greater fire hazard than a vapor leak LPG containers are allowedd to charge to a max of how many pounds? 100 pounds Universal Type container may be used Either upright or horizontal When are universal containers used When its difficult to maintain an upright position on a standard container How must control valve be opened? By hand and turning 2 full revolutions counter clockwise Rubber Slip Connections Prohibited in LPG containers Flexible nonmetallic hoses May be used on construction sites/emergency indoor repairs/manhole operations non-metallic hose must be DOT approved designed for Working pressure of not less than 250 psi outdoors or 350 psi indoors LPG cannot be used Underground or any below grade locations Heaters used for curing and drying must be at least how many feet away from LPG container? 6 feet Combustile materials must be how far away from LPG? At least 10 feet When should LPG containers be provided with transportation plugs When they have a capacity over 20 pounds How must containers over 20 lbs be moved to dif floor? Only by occupied elevator FDNY transportation permit is required when? When quantities are ovee 400 SCF (47 lbs) How is CNG made? By compressing natural gas mostly composed of methane What is the max capacity of a CNG container? 381 SCF Natural gas is heavier or lighter than ajr? Lighter Methane gas a LEL and UEL of? 5% and 15% Length of hose cannot exceed 30 feet outdoors 6 feet indoors What should you never use to check leaks? A flame What does a bubble mean at a connection? There may be a problem with the connection What does ice build up indicate? Gas is leaving the container in a liquid state What should you do if there is ice build up on appliance or connectors? Shut off main control valve, take it out of service and return it to the supplier immediately w What should you do if theres ice build up on container itself or control valve? Dial 911 What is the max travel distance to a fire extinguisher from the work location? 30 feet How must fire extinguishers be installed? So that the top is not more than 5 feet above the floor and the clearance between the bottom and the floor is not less than 4 inches How must a flame be approached? From an upwind direction What should you do if you cannot shut off gas supply? Let fire burn itself out and call 911 fire extinguishers are required to be inspected Monthly When is a storage permit required? Over 400 SCF What is the maximum indoor storage LPG capacity 200 pounds, unless the storage location is not accessible to the public, then it can go up to 300 pounds Outdoor storage of LPG is limited to 400 lbs Storage enclosures must be Protective of temperatures/tipping/physical damage/tampering Metal open fence enclosure at least 6 feet in height Locked gate opening outward Container must not be stored on roofs of buildings No smoking signs must be At least 10 inches by 14 inches in size and letters must be 2 inches high MAX CAPACITY ON TRUCK LPG 40 LBS CNG 340 SCF When should you adjust the discharge rate on the regulator? NEVER, it is factory set. Excess flow check valve Will shut off gas supply if control valve is shut off too quickly Cannot be used for forklift and returned to supplier if not installed by manufacturer Activates if container falls and regulator is damaged Indoor storage room rules Fire extinguisher (10 b:c) fixed to the outside of the room and another no more than 30 feet from the entrance There may be more than one location of 3,500 SCF in a room, provided they don't exceed that and they are more than 50 feet apart or an approved masonry barrier having a minimum fire resistance rating of 2 hours Each construction site should be equipped with At least one 40 because rated, wheeled fire extinguisher. Must be kept outside storage facility or placed somewhere else accessible no further than 30 feet