Sprinkler system must NOT be shut off or impaired while hot work is performed
Place damp cloth guards on individual sprinkler heads
The person
... [Show More] conducting the fire watch ______ have other duties
CANNOT
A portable fire extinguisher with a rating of _________ is required and should be within ____ feet travel distance hot work area
2-A:20-B:C///30
For ROOFING OPERATIONS, a portable fire extinguisher with a minimum rating of ______ is required
3-A:40-B:C
Fire watch on floors below is ______
required
The fire watch must continue for a minimum of ____ minutes after the hot work is done
30
For any CNG or LPG torch operations, the first inspection shall be conducted ___ minutes after completion. The second inspection shall be conducted _______ after completion of torch operations.
30 min///1 hour
The fire guard or fire watch personnel must complete a signed inspection report and it must be submitted to and retained by the person in charge of the torch operations.
The report must be made available and maintained on the premises for a minimum of 48 hours after the work is complete.
Most common fuel gasses used in blowtorches are ______
LPG (butane, propane) natural gas (methane) (either CNG or piped natural gasses)
Soldering and brazing temperatures are typically______
840 degrees F
Oxy-acetylene generates the highest temperature which can reach up to _____
6000 degrees F
Gas torches can exceed _________ and are used for burning weeds, melting ice, or applying tar to a roof
2000 degrees F
If the torch operation is to stop for a period of _________________, the torch vale must be closed and the gas supply to the torch must be completely shut
1 hour or more
Containers, valves, regulators, hose and other apparatus and fittings for oxygen must be kept free of __________.
oil or grease
Backfire
this occurs when the flame of a torch goes out and there is a loud snap or pop
Flashback
This occurs when the cutting or welding flame burns inside the torch or the hoses and it is usually accompanied by a whistle or hissing noise. As soon as it is noticed, the torch control valves should be closed. This indicated there is something wrong with the equipment, either damage or blockage
A hot work area should be _____
well ventilated
Whoever is working with hot work equipment CANNOT wear _____________ since it is susceptible to burning and ignition
frayed clothing
Empty containers must be __________
handled in the same manner as full ones
Gas containers must be replaced when empty.
It is ILLEGAL to refill gas container
All gas containers, whether CNG or LPG, must be secured in an __________
upright position and must not be stacked or stored on shelves
All gas containers and related equipment must be _________
protected from extreme temperature and physical damage
The control valve of any gas container must be _______
opened by hand
Acetylene valves shall not be opened more than ______
1 ½ turns
The purpose of a regulator is to ________
control the flow of gas and lower the pressure from the container to the appliance. It also acts like a safely barrier between the high pressure of the gas container and the end use appliance
Hoses must be as _______ protecting from mechanical injury
short as practical
No hose is allowed to exceed ____feet
30
A compressed gas container MUST NOT ________
be rolled on its side or its rim, only by approved lifting equipment
Ropes, chains or slings shall NOT be used to ________
suspend compressed gas containers unless such containers have been designed for such handling
CNG and LPG containers must be located _______
away from electric power lines, piping containing flammable or combustible liquids, piping containing flammable gasses, and piping containing oxidizing materials
Fuel gas or oxygen containers in storage must be separated from any combustible materials by a minimum distance of _____
20 feet
Oxidizing gasses shall NOT be stored or used or come in contact with _______
oil, grease or other petroleum bases
A permit is required for any storage area storing any flammable gas in excess of ____ or any oxygen in excess of ____
400 SCF///504 SCF
Copper tubing should NEVER ______
be used to splice the acetylene hose because the copper with react with the acetylene and it can cause an explosion
NEVER set the regulator for LPG above ____ as the acetylene will decompose explosively
15 PSI
Examples of LPG
Propane, propylene, butane, and butylene
Most commonly used LPG is ____
butane and propane
LPG is most commonly referred to as _____
bottled gas
LPG is naturally _______
colorless and odorless
LPG is heavier than _____
air
LPG containers must be tested by DOT approved vendors every _______
5 years
LPG containers can be a maximum weight of _____
100 pounds
LPG must be only used in _________, not underground
well ventilated areas
LPG containers with a weight of _______ shall be provided with transportation plugs
20 pounds
CNG is mainly composed of ____
Methane
Any single CNG container MUST NOT exceed ______
381 SCF [Show Less]