OXYACETYLENE WELDING

Question 1

WHAT IS THE NAME COVERING ALL WELDING PROCESSES USING OXYGEN AND FUEL GAS

Answer 1

OXYGEN FUEL (OXYFUEL) WELDING

Question 2

WHAT IS THE AWS ABBREVIATION FOR OXYFUEL WELDING

Answer 2

OFW

Question 3

WHAT IS THE ABBREVIATION FOR OXYACETYLENE WELDING

Answer 3

OAW

Question 4

HOW DOES THE OAW EQUIPMENT PERFORM THE WELDING PROCESS

Answer 4

OXY AND ACETYLENE ARE COMBINED IN THE RIGHT PROPORTIONS IN THE MIXING CHAMBER, CREATING A FLAME AT APROX 5600F, FLAME MELTS BASE AND FILLER IS ADDED AS NEEDED

Question 5

6 ADVANTAGES OF OAW

Answer 5

LOW COST
PORTABLE
CONTROL OF HEAT INPUT AND PUDDLE VISCOSITY
NO EXTERNAL POWER REQUIRED
GOOD CONTROL OF BEAD SIZE AND SHAPE 
FUEL MIX IS HOT ENOUGH TO MELT STEEL

Question 6

WHAT IS THE HOTTEST PART OF A NEUTRAL FLAME

Answer 6

TIP OF THE INNER CONE

Question 7

EFFECT OF OXIDIZING FLAME TO THE WELD

Answer 7

OXIDIZING HAS MORE OXY THAN THE FLAME CAN BURN
OXY COMBINES WITH CARBON IN BASE METAL CREATING CARBON DIOXIDE GAS
BASE METAL HAS A CHANGE IN CARBON CONTENT, DEGRADING STRENGTH INCREASING BRITTLENESS

Question 8

EFFECT OF CARBURIZING FLAME TO THE WELD

Answer 8

HAS MORE ACETYLENE THAN FLAME CAN BURN

CARBON IN ACETYLENE ADDS TO CARBON TO WELD PUDDLE CREATING GAS BUBBLES AND POROSITY

Question 9

WHAT IS ACETYLENE GAS

Answer 9

CLEAR GAS LIGHTER THAN AIR

CHEMICAL C2H2

Question 10

WHAT IS THE ODOR TO ACETYLENE

Answer 10

MIXTURE OF THE ACETYLENE GAS AND ACETONE STABILIZER IN THE CYLINDER

Question 11

HOW IS ACETYLENE MADE

Answer 11

RESULT OF DISSOLVING CALCIUM CARBIDE IN WATER, GAS IS THEN CAPTURED
1LB CALCIUM CARBIDE=10CUF ACETYLENE

Question 12

WHERE DOES CALCIUM CARBIDE COME FROM

Answer 12

SMELTING LIME AND COKE

Question 13

WHAT IS THE CHEMICAL EQUATION OF COMBUSTION OF ACETYLENE IN NEUTRAL FLAME

Answer 13

C2H2+2.5O2>2CO2+H2O

ONE PART ACETYLENE AND 2.5 PARTS OXY COMBINE