PRACTICE SET HIGH YIELD QUESTIONS AND
SOLUTIONS A+
◉ 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. Answer: 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 ______. Answer:
LPG (butane, propane) natural gas (methane) (either CNG or piped
natural gasses)
◉ Soldering and brazing temperatures are typically______. Answer:
840 degrees F
◉ Oxy-acetylene generates the highest temperature which can reach
up to _____. Answer: 6000 degrees F
◉ Gas torches can exceed _________ and are used for burning weeds,
melting ice, or applying tar to a roof. Answer: 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. Answer: 1 hour or more
◉ Containers, valves, regulators, hose and other apparatus and
fittings for oxygen must be kept free of __________.. Answer: oil or
grease
◉ Backfire. Answer: this occurs when the flame of a torch goes out
and there is a loud snap or pop
◉ Flashback. Answer: 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 _____. Answer: well ventilated
◉ Whoever is working with hot work equipment CANNOT wear
_____________ since it is susceptible to burning and ignition. Answer:
frayed clothing
◉ Empty containers must be __________. Answer: handled in the same
manner as full ones