Oxyacetylene Heating And Cutting

Question 0

What are the one way check valves for?

Answer 0

To prevent back flow of gases.

Question 1

How can you identify an oxygen hose?

Answer 1

The connections are right-handed threads, and the hose is green.

Question 2

What are the normal sizes for welding tips?

Answer 2

00, 0 and 1 through 10.

Question 3

How do you clean the welding tips?

Answer 3

Use the tip cleaners.

Question 4

What should you do before installing the heating and welding tip?

Answer 4

Check the O-ring seal prior to installing.

Question 5

Wear goggles when using oxyacetylene equipment to protect your eyes from:

a) light
b) heat
c) sparks and slag
d) all of the above

Answer 5

d) all of the above

Question 6

Technician A says its acceptable to carry a disposable lighter in your pocket when using oxyacetylene equipment. Technician B says nylon clothing is much better to wear than cotton when using oxyacetylene equipment. Which technician is correct?

a) Technician A
b) Technician B
c) both technicians
d) neither technicians

Answer 6

d) neither technicians

Question 7

To check for leaks in oxyacetylene equipment you should use:

a) a match
b) a lighter
c) leak detection fluid
d) soap and water

Answer 7

c) leak detection fluid

Question 8

Shop ventilation is adequate when cutting which of the following with oxyacetylene equipment?

a) galvanized sheet metal
b) a cadmium coated muffler
c) a piece of metal joined with lead-tin alloy solder
d) none of the above

Answer 8

d) none of the above

Question 9

If grease is exposed to pure oxygen, the grease can explode:

a) without ignition
b) only if a spark ignites it
c) only if a flame ignites it
d) after prolonged heating

Answer 9

a) without ignition

Question 10

When oxygen from a cylinder is being used, the valve should be opened:

a) fully
b) no more than 2 turns
c) no more than 1 turn
d) no more than 1/2 turn

Answer 10

a) fully

Question 11

Fusible plugs in acetylene cylinders are located:

a) in the top if the cylinder
b) in the bottom of the cylinder
c) both a and b
d) neither a or b

Answer 11

c) both a and b

Question 12

Acetylene should be drawn from a cylinder only when the cylinder is:

a) in any position
b) upright
c) on its side
d) upside down

Answer 12

b) upright

Question 13

As cylinder pressure decreases, the outlet pressure from a pressure regulator:

a) goes down
b) remains constant
c) goes up
d) goes up first and then down

Answer 13

b) remains constant

Question 14

Acetylene hoses used with oxyacetylene are:

a) red
b) green
c) orange
d) purple

Answer 14

a) red

Question 15

When you are finished using oxyacetylene equipment:

a) the oxygen and acetylene should be shut off at the cylinders and the regulators should be left alone
b) the oxygen and acetylene should be shut off at the torch valves and the regulators should be left alone
c) the oxygen and acetylene should be shut off at the cylinders and the torch valves and the regulators should be left alone
d) the oxygen and acetylene should be shut off at the cylinders and the regulators should be backed out completely.

Answer 15

d) the oxygen and acetylene should be shut off at the cylinders and the regulators should be backed out completely

Question 16

The most suitable flame to use when heating with oxyacetylene equipment is:

a) an acetylene flame
b) a carbonizing flame
c) an oxidizing flame
d) a neutral flame

Answer 16

d) a neutral flame

Question 17

When oxyacetylene equipment is used for heating, the acetylene regulator is adjusted to:

a) the pressure used when balancing the torch
b) the pressure recommended by the manufacturer
c) 7 kPa (1 psi) per tip size
d) 105 kPa (15 psi) per tip size

Answer 17

a) the pressure used when balancing the torch

Question 18

A backfire that occurs when using an oxyacetylene heating tip might occur because:

a) oxygen pressure is higher than acetylene pressure
b) acetylene pressure is higher than oxygen pressure
c) oxygen pressure is too low
d) acetylene pressure is too low

Answer 18

d) acetylene pressure is too low

Question 19

The material that can be cut easily using an oxyacetylene torch cutting attachment is:

a) carbon steel
b) stainless steel
c) copper
d) aluminum

Answer 19

a) carbon steel