Base Metal Preparation
Most work site fires related to welding operations are caused by _____.
a. preheating fires
b. cutting torches
Most work site fires related to welding operations are caused by cutting torches.
Considering the two joint preparation methods-mechanical and thermal-the mechanical method is _____.
a. slower
b. faster
Considering the two joint preparation methods-mechanical and thermal-the mechanical method is slower
When two pieces of metal are welded end-to-end and forces are applied inwardly from each end, the pieces and their weld are being _____.
a. torqued
b. compressed
b. compressed
When two pieces of metal are welded end-to-end and forces are applied inwardly from each end, the pieces and their weld are being compressed.
In plasma arc cutting, plasma is created by _____.
a. passing fuel gases through a large orifice inside the torch
b. superheating gas in an electric arc
b: superheating gas in an electric arc
In plasma arc cutting, plasma is created by superheating gas in an electric arc
Parts that have been hardened using the cold-forming process may look _____.
brighter in appearance
Parts that have been hardened using the cold-forming process may look brighter in appearance.
As the carbon content of carbon steel rises, the steel becomes _____.
a. weaker
b. stronger
As the carbon content of carbon steel rises, the steel becomes stronger
Welded pipe fittings _____.
a. must be field beveled and then cleaned
b. are typically beveled from the factory but need cleaning
(B)
Welded pipe fittings are typically beveled from the factory but need cleaning
Surfacing welds can be used to _____.
a. weld stainless steel pieces together
b. build up surfaces
b. build up surfaces
Surfacing welds can be used to build up surfaces.
Which of the following PPE is considered optional for plasma arc cutting?
a. Hearing protection
b. A full leather hood
b. A full leather hood
The process in which heat is applied to remove strains and reduce grain size is known as _____.
normalizing
The process in which heat is applied to remove strains and reduce grain size is known as normalizing.
The largest of the three common stainless steel groups, and the type most often encountered by welders, is ferritic group?
True or False
False: Austenitic group
The largest of the three common stainless steel groups, and the type most often encountered by welders, is Austenitic group?
Nibblers prepare the edge of base metals using a special grinding wheel?
True or False
False: Reciprocating punch
Nibblers prepare the edge of base metals using a reciprocating punch.
When applying a fillet weld to an outside corner joint, ASME approves of the half-lap joint.
True or False
True
When applying a fillet weld to an outside corner joint, ASME approves of the half-lap joint.
Which of the following safety statements related to plasma arc cutting is true?
a. A hot-work permit is not required for plasma arc cutting due to the nature of the process.
b. Never carry matches or gas-filled lighters in your pockets.
Which of the following safety statements related to plasma arc cutting is true?
b. Never carry matches or gas-filled lighters in your pockets.
What is the usual cooling rate per hour for stress relieving?
What is the usual cooling rate per hour for stress relieving?
300°F to 500°F (149°C to 260°C)
Common-grade stainless steels normally contain at least 11 percent chromium?
True or False
Common-grade stainless steels normally contain at least 11 percent chromium?
True
Cutting metal with oxyfuel, plasma arc, or air-carbon arc processes is referred to as thermal cutting?
True or False
Cutting metal with oxyfuel, plasma arc, or air-carbon arc processes is referred to as thermal cutting?
True
Always try to position the weldment so that welding is performed in the _____.
Flat position
Always try to position the weldment so that welding is performed in the flat position.
Sputtering or hissing of the torch is often caused by _____.
Sputtering or hissing of the torch is often caused by moisture entering the unit through the air line.
Maintaining the temperature of the weld zone during welding is called _____.
interpass temperature control
Maintaining the temperature of the weld zone during welding is called interpass temperature control.
Common grade stainless steels are classified by their _____.
Common grade stainless steels are classified by their grain structures
Gouging root welds and seams is best done by _____.
Gouging root welds and seams is best done by air-carbon arc cutting.
A detailed listing of the rules and principles that apply to specific welded products is a _____.
welding code
A detailed listing of the rules and principles that apply to specific welded products is a welding code.
Some light-duty PAC equipment has a built-in _____.
air compressor
Some light-duty PAC equipment has a built-in air compressor.
In an induction heater, the magnetic field used to heat the metal is _____.
alternating
In an induction heater, the magnetic field used to heat the metal is alternating.