WorksheetsOFC Pre use quiz
Total questions: 18
Worksheet time: 9mins
Acetylene may be dangerous because it is
compressed
flammable
explosive
all of these
Which gas is not a fuel used for torches?
acetylene
oxygen
propane
all of these
The acetylene pressure to light a torch should be
5 psi
15 psi
25 psi
50 psi
The temperatures from gas flames using oxyfuels are
150° to 200°F
400° to 500°F
1,000° to 2,000°F
5,000° to 6,000°F
A cutting torch must be adjusted so that it is neutral when
cutting
preheating
the oxygen lever is down
all of these
Correct oxygen and fuel pressure will vary with
the tip
the job
the fuel
all of these
Brazing is much like
soldering
painting
fusion welding
arc welding
_______usually green and have right hand threaded hose connectors.
Acetylene
Oxygen
Propane
Natural Gas
Grade R hoses _________
for acetylene only
for any fuel gas
for propane only
for oxygen only
Three elements needed to ignite fire:
water, fuel,oxygen
spark, gas, compression
heat, fuel, oxygen
striker, gas, oxygen
Intense prolonged exposure of light radiation can increase chance of _______
memory loss
blindness
skin cancer
tendonitis
Colorless, Garlic-like odor, Extremely unstable at pressure over 15 psi,
Cylinder contains acetone-saturated porous material to help stabilize fuel gas, Cylinder pressure may be as high as 250 psi when stabilized with acetone, Working pressures range from 1 – 15 psi
Acetylene
Oxygen
Propane
Natural Gas
Acetylene hoses________________
red with left hand threaded connections
green with right hand threaded connections
red with right hand threaded connections
green with left hand threaded connections
_______usually blue and have left hand threaded hose connectors.
Acetylene
Oxygen
Propane
Natural Gas
Grade T hoses _________
for acetylene only
for any fuel gas
for propane only
for oxygen only
Excessive exposure to welding fumes can lead to _______
memory loss
blindness
lung diseases
tendonitis
What is the purpose of a flashback arrestor in a welding setup?
To prevent the flow of gas in the wrong direction
To stop the flame from traveling back into the equipment
To control the pressure of the gas
To cool down the welding torch
What is the primary purpose of a welding helmet?
To protect the welder's eyes from harmful UV and IR radiation
To provide a clear view of the welding area
To keep the welder's head cool during welding
To improve the welder's visibility in low light conditions
