TB 17 Portable cutting torch

Question 1

TB 17 Portable cutting torch

The portable oxy-acetylene cutting torch used by this Department will operate for approximately ___ minutes in normal usage and will cut metal up to __ inches thick.

Answer 1

15

2

Question 2

TB 17 Portable cutting torch

All oxygen connections have ____-hand threads.

Answer 2

right

Question 3

TB 17 Portable cutting torch

Acetylene cylinder valves have ____-hand threads

Acetylene hose connections at torch and regulator are ___-hand thread.

Answer 3

right

left

Question 4

TB 17 Portable cutting torch

Open ACETYLENE cylinder valve ____ turns, no more.

Open OXYGEN cylinder valve ____.

Answer 4

1 1/2

fully

Question 5

TB 17 Portable cutting torch

DO NOT USE OIL ON THIS APPARATUS. OIL AND GREASE ARE EASILY IGNITED AND BURN VIOLENTLY IN THE PRESENCE OF OXYGEN UNDER PRESSURE.

Answer 5

reference

Question 6

TB 17 Portable cutting torch

Normal Operating Pressure.

Metal Oxygen Acetylene Working Time

0 - 1” 35 p.s.i. 7 p.s.i. 15 min.

1”- 2” 60 p.s.i. 7 p.s.i. 9 min.

Answer 6

reference

Question 7

TB 17 Portable cutting torch

To avoid excessive discharge of acetone, unless absolutely necessary during emergencies, an acetylene cylinder should not be opened or used with the valve lower than the body of the cylinder.

Answer 7

reference

Question 8

TB 17 Portable cutting torch

Open the cylinder valve slowly a fraction of a turn.

Watch the cylinder contents gauge pointer; when it stops moving, open the cylinder valve further:

a) Open ACETYLENE cylinder valve 1 1/2 turns, no more.
b) Open OXYGEN cylinder valve fully.

Answer 8

reference

Question 9

TB 17 Portable cutting torch

Lighting

Open torch valve fully

Open torch Acetylene valve 1/8 turn and light

Open pre-heat oxygen valve a fraction of a turn

Adjust preheat valve until a clean burn

Answer 9

reference

Question 10

TB 17 Portable cutting torch

Shutting Off

Close cutting oxygen valve

Close torch acetylene valve

Close pre-heat oxygen valve

Close torch oxygen valve

Answer 10

reference

Question 11

TB 17 Portable cutting torch

Backfire When flame goes out with a pop

Cause -

Incorrect operating PSI

Touching metal with the nozzle

Loose nozzle

IF it occurs -

Immediately close preheat oxygen valve

close torch acetylene

After a moment relight

Answer 11

reference

Question 12

TB 17 Portable cutting torch

Carry cylinders vertically

test for leaks with soapy water

Answer 12

reference

Question 13

TB 17 Portable cutting torch

Cutting torch– Keep valve packing nut tight enough to avoid leakage. To clean the cutting tip and prevent clogging, use the tip cleaners provided – #8 preheat hole, #22 cutting holes.

Answer 13

reference