TB 17 - Portable Cutting Torch

Question 1

The portable oxy-acetylene torch will operate for approximately how many minutes in normal usage?

Answer 1

15 minutes

Question 2

The cutting torch will cut metal up to how many inches thick?

Answer 2

2 inches

Question 3

What safety equipment provided with the unit are to be used at all times while cutting?

Answer 3

Welding goggles and gauntlet type gloves

Question 4

Another member is to stand by with what to protect operator and watch for adjacent ignition?

Answer 4

Suitable extinguisher

Question 5

Do not cut into an area containing what?

Answer 5

Combustible gases

Flammable liquids

Question 6

You should avoid inhalation of smoke released from cutting particularly what plated materials?

Answer 6

Cadmium or lead

Question 7

Do not use what on this to as it easily ignites and burns violently in the presence of oxygen under pressure?

Answer 7

Oil and grease

Question 8

For up to 1” of metal set the oxygen pressure and acetylene pressure to what psi for a max of how much working time?

Answer 8

Oxygen: 35 psi
Acetylene: 7 psi
15 mins working time

Question 9

For 1”-2” of metal set the oxygen pressure and acetylene pressure to what psi for a max of how much working time?

Answer 9

Oxygen: 60 psi
Acetylene: 7 psi
9 minute working time

Question 10

Open the cylinder valve how much (“cracking”) and then close it to blow away any dust or dirt which may have accumulated in valve outlet?

Answer 10

Slightly for an instance

Question 11

All oxygen connections and acetylene cylinder valves for regular connection have which handed threads?

Answer 11

Right hand

Question 12

Acetylene hose connections at torch and regulator have what handed threads?

Answer 12

Left handed

Question 13

Attach the regulator to the cylinder valve and tighten what but securely with a wrench?

Answer 13

Union nut

Question 14

Make sure the pressure adjusting screw is released by turning the regulator handle in what direction until it will turn no further?

Answer 14

Left (counterclockwise)

Question 15

To avoid accessible discharge of acetone, the cylinder should not be opened or used with the valve at what height of the body of the cylinder?

Answer 15

Lower

Question 16

Open acetylene cylinder valve how many turns?

Answer 16

1 1/2 turns

Question 17

Open the oxygen cylinder valve how many turns?

Answer 17

Fully

Question 18

Never stand where of regulator when opening a cylinder valve?

Answer 18

In front of back

Question 19

Always leave the key wrench in place on the valuable of which cylinder when it is in use?

Answer 19

Acetylene

Question 20

When lighting the torch, open the oxygen valve on torch how much?

Answer 20

Fully

Question 21

When lighting the torch open the acetylene cylinder valve on torch how much?

Answer 21

1/8 turn

Question 22

When lighting open the preheat oxygen valve how much?

Answer 22

Fraction of a turn

Question 23

After lighting torch, adjust preheat valance until flame is clean, with the inner cone how sharp, neutral flame?

Answer 23

Cone sharp and to a point

Question 24

Once torch is lit, open the cutting oxygen valve (depress lever) and if necessary adjust what?

Answer 24

Flame

Question 25

If the flame burns away from the end of nozzle or blows off, decrease the what valve opening and immediately relight cutting torch, adjust preheat oxygen valve to obtain a neutral flame?

Answer 25

Acetylene valve

Question 26

When shutting off the torch, in what order do you close the valve on the torch?

Answer 26

Cutting oxygen valve
Torch acetylene valve
Preheat oxygen valve
Torch oxygen valve

Question 27

When flame goes out with a sharp snap or pop common causes are what?

Answer 27

Incorrect operating pressures
Touching metal with nozzle
Loose nozzle or dirt on seat of nozzle

Question 28

If a backfire occurs (flame goes out), close which valves and delight after trouble has been located and corrected?

Answer 28

Preheat oxygen valve

Torch acetylene valve

Question 29

For flashback, when the flame burns back inside the torch what type of sound will you usually hear?

Answer 29

Shrill hissing or squealing

Question 30

If flashback occurs, immediately close which valves?

Answer 30

Preheat oxygen valve

Torch acetylene valve

Question 31

After relighting torch, if flashback occurs, send torch in for what?

Answer 31

Repair or replacement

Question 32

The cutting torch assembly is be carried on apparatus with the cylinders in what position?

Answer 32

Vertical position

Question 33

For checking for leaks while in quarters with a soapy water solution, always use grease free soap such as what brand?

Answer 33

Ivory brand

Question 34

Always store the spar acetylene torch in what position because if stored in another position the acetylene solvent may be delivered to torch when used causing improper operation?

Answer 34

Vertical

Question 35

Always keep cylinders clean and free from what because a violent explosion could occur if oxygen came in contact?

Answer 35

Oil and grease

Question 36

Keep packing nuts right enough to avoid what?

Answer 36

Leakage

Question 37

To clean the cutting tip and prevent clogging use which provided cleaners?

Answer 37

#8 preheat hole
#22 cutting holes