Red Seal Flashcards
What does the water cooled GTAW torch do?
Removes waste heat
This type of torch is designed to manage heat during welding processes.
GTAW, DCEN heat is?
⅔ in the work, 1/3 in the tungsten
This indicates how heat is distributed during the welding process.
What protects the puddle in SAW?
Granular flux
Granular flux is used to shield the molten weld pool from contaminants.
What is the correct voltage for Air Arc Gouging?
28 volts
This voltage is typically required for effective air arc gouging.
What is Chromemoly used for?
High temperature applications
Chromemoly steel is known for its strength at elevated temperatures.
High carbon steels contain what percentage of carbon?
0.50% or more
High carbon steels are characterized by their higher carbon content.
Why is preheating recommended with copper?
Because of its high thermal conductivity
Preheating helps to manage the heat during welding processes with copper.
Which component of a machine changes AC current to DC?
Rectifier
A rectifier is essential in converting alternating current to direct current.
What does the abbreviation RFSO stand for on a material list?
Raised Face Slip On
This term is used in piping and fitting specifications.
Which standard refers to welded steel construction?
CSA W59
CSA W59 outlines the requirements for welding of steel structures.
What tool is used for scribing large arcs and circles?
Tramme Points
Trammes are tools that assist in marking arcs and circles accurately.
Which fuel gas provides the best preheat?
Propane
Propane is favored for its efficiency in preheating applications.
What is the hand signal for lifting a load vertically?
Finger upwards with a turning motion
This signal is commonly used in construction and manufacturing settings.
What is annealing?
A heat treatment process that leaves the material in its softest, toughest, and weakest state.
What is the temperature range for stress relieving in welded steel fabrication?
1000 to 1150°F.
What is used to identify weld metal chemical composition in ASME?
F-Numbers.
What determines the thickness of steel that can be punched?
Equal to or less than the punch diameter.
What happens when a flame constantly extinguishes and reignites?
It indicates a backfire.
What two types of shielding gases are used with a plasma dual flow PAC torch?
CO2 and Nitrogen.
What method is best to control arc radiation, vapors, and fumes when using PAC?
Use a water table.
What are the equipment requirements for CACA?
Source of air, carbon electrodes, electrode holders, and power source.
What happens if you don’t remove glass spots when welding GMAW on root?
Porosity.
What do you need to do to weld a flatter and wider bead in SAW?
Increase volts.
What happens if you don’t purge medium-high carbon steel when welding root with fluxcore?
Hardening.
What is a common flaw when welding medium-high carbon steel?
Cracking.
When welding GMAW with a backing plate, what gap should be used?
3/16.
Should you use preheat when welding Inconel, and what temperature?
Yes, preheat is recommended.
450-500 Celsius
What size of grinding disc should be used to feather tacks for pipefitting?
3/32 (2.4mm).
What is the CFH for fluxcore welding?(gas flow rate)
95-1045.
What type of steel is 45 carbon steel?
Medium.
What temperature should be used when hardfacing with low alloy melting point?
Specific temperature not provided.
What is the purpose of hardfacing with titanium/chromium?
Mildly abrasive - plowing sand.
When welding single bevel with a backing plate, what land should be used?
None.
What is the purpose of the ferrule in stud welding?
Hold stud in place until molten puddle forms.
What type of joint is used in spot welding?
Lap joint.
How to set up pipe for welding?
Bend rod into a V or use a larger gap.
What is the common default issue when TIG welding high/medium carbon steel?
Cracking.
When welding titanium, what color indicates a bad weld?
White is bad; silver is good.
What gas should be used when welding aluminum overhead?
Helium 70/30 argon.
What position should be used for 1” aluminum welding?
Flat.
What is the recommended amps for spray welding?
150-160.
What causes sugaring for stainless steel?
high temperatures cause the chromium in the steel to oxidize and form a white or grayish residue on the surface
What is the welding setup for GMAW with 2 roots and 1 cap?
Use a backing plate.
What is the layout for a 3 piece 90?
Specific layout not provided.
What adjustment is needed for fusium welding of cast iron?
Neutral
What changes when cutting with plasma?
Sees changed by unstable.
How can instability with plasma be fixed?
By changing nozzle size
What should you consider when choosing equipment for lifting?
Weight, not size!
What is required to change oxy fuel cutting to gouging?
Change tip to gouging tip.
Why is acetylene used for oxy fuel cutting?
It has a high temperature.
What rod is used for back gouging?
0, D, Flat.
What type of power does an industrial welding machine require?
3 Phase Power.
Where should you store SAW flux?
In a dry, warm place.
What should you do when using an oxy acetylene track torch?
Secure track and plate.
What are the advantages of track out over hand cut?
Better control, faster cutting.
Why is P.A. C 95 more efficient?
Mao walks, temperature increased, smaller MAZ.
What controls amps with stud welding?
Size of base standoff stud.
Increase cable size.
What is the ASME welder qualification for pressure welder?
Section 9.
What is the inclination for gouging (PAL)?
30-40° Forehand.
What gas is used for tonizing?
Helium (neuter penetr).
What effects some of the nugget?
Tip one.
What variables affect welding?
Tool rest on a fixed grinder must be set to a maximum of 1 from wheel.
What height must an employer have a guardrail erected for a temporary work area?
3m (lofed).
What is the process of cracking an oxygen cylinder?
Remove dust, foreign objects
How do you check if a reverse value flow is working?
Blow air backwards through the valve.
Why is acetylene most frequently used?
It provides higher heat.
What could rocking a file cause?
An uneven surface.
When taping a hole, which direction should you turn the tap?
Turn tap counterclockwise to break the chip.
What must clamps be for current?
Clamps must be the correct size and clamped tight.
What is the Fast Fill Electrode?
7024
What is the Fast Follow Electrode?
6012
What is the Fast Free Electrode?
6011
What is the Cellulose base Electrode?
6010
What is the Rutile based Flux Electrode?
6013
What is the Mineral Based Flux Electrode?
7018
What is the Electrode that contains amounts of moisture?
6011
What happens if you don’t remove glass spots when welding GMAW on root?
Porosity
What do you need to do to weld a flatter and wider bead in SAW?
Increase volts
What happens if you don’t purge medium-high carbon steel when welding root with flux core?
Hardening
What is a common flaw when welding medium-high carbon steel?
Cracking
What gap should be used when welding GMAW with a backing plate?
3/16
Should you use preheat when welding Inconel and Monel, and what temperature?
No preheat needed, non-heat treatable
What size of grinding disc should be used to feather tacks for pipefitting?
3/32 (2.4mm)
What is the CFH for flux core welding?
30 to 40 CFH
What type of carbon steel is .45 carbon steel?
Medium-high
What temperature should be used when hardfacing with low alloy melting point?
Not specified
What is the purpose of hardfacing with titanium/chromium?
Mildly abrasive, for plowing sand
When welding single bevel with a backing plate, what land should be used?
None
What is the purpose of the furrel in stud welding?
Hold stud in place until molten puddle is formed
What joint is used in spot welding?
Lap joint
How to set up pipe for welding?
Bend rod into V or use a larger gap
What is the common default when TIG welding high/medium carbon steel?
Cracking
What does a white appearance indicate when welding titanium?
Bad weld
What gas should be used when welding aluminum overhead?
70/30 Helium/Argon
What position should be used for 1” aluminum welding?
All positions
What amps are needed for spray welding?
150-160
What causes sugaring in stainless steel welding?
Not specified
What is the configuration for GMAW with 2 roots and 1 cap?
With a backing plate
When gouging what required duty cycle?
%100 or highest available
Main purpose of copper coating on CAL-A electrades?
reduce vaportation rate of electrode
Three types of CAC – a electrodes?
DC plain – DC copper coated and AC copper coated
How could you achieve more than 1000 Amp?
Two or more machines connected in parallel
Maximum electrode extension with CAC – a?
7 inch electrode extension
What could cause excessive carbon buildup on base metal when gouging?
Improper air, jet position, travel speed too fast
What problem will in adequate air with gouging operations cause?
Carbon deposit ,contaminants metal
Open circuit voltage with PAC gouging process?
120–400 V
Most common torch with PAC
Air gas plasma arc cutting torch
What polarity is used with PAC?
DCSP (DCEN)
What is done to a PAC torch to make it suitable for gouging operations?
Change nozzle to one that has lower arc stream velocity
How many different Welding tips are used for oxy fuel, welding, and brazing?
2
Recommended amps for 7018 –3/32 rod?
70-100amp
Characteristics of a short arc are?
Decreased voltage increased amperage longer deposit
Changing incline angle has what effect?
Depth of penetration
Most commonly used drive role with FCAW?
KNURLED drive rolls
E-70T-3
What position is indicated?
Flat and horizontal
Increased amps with flux core procedures. What kind of bead does that make?
Narrow, high bead, less flow more penetration
Welding steel with gas, metal arc welding what gas gives most penetration?
CO2
Metal transfer with gas metal arc welding, what procedure has the least spatter?
Spray
A kneeling high carbon is done to?
Soften steel
The base of an inclined ladder shall not exceed what from base of wall?
1/4 of the vertical height
Three key elements of WHMIS?
Labels, MSDS and education
Valve protecting caps must?
Remain on cylinder until it is secured
7048 is what position rod
All position rod
Number one cause of flashback?
Uneven pressure
What is the name given by scientists to a substance made only of one type of atom?
Element
What is an alloy?
A material composed of two or more elements one of which is a metal
What are the three states of matter?
Solid liquid gas
Name the three most common steel numbering systems used in Canada?
ASTM, CSA, AISI
What is the main difference between steel and cast-iron?
The amount of carbon. Cast-iron has more than 1.7%.
Which crystalline structure does iron adapt at room temperature
Bcc body centred cubic
Three main ways to produce hardness?
Alloying, finer grains, heat treatment(quenching)
Perlite is what phase?
Soft phase
Martensite is what phase?
Hard phase
Bainite is done by?
Produced immediate rates of cooling. Its hardness is in between.
Why is it necessary to heat treat steals
To change the materials properties, such as hardness, strength, or toughness
To remove stresses from welded parts which heat treatment is normally recommended?
Stress relief
Which heat treatment produces the softest metal?
Annealing
What is the purpose of tempering?
Tempering increases toughness without affect affecting strength
True or false?
Weld metal shrinkage is not proportional to the amount of weld metal?
False
True or false?
Longitudinal residual stress may be as high as the yield stress of the base metal
True
True or false?
There is no presidency stress in a steel plate with mill rolled edges without any additional heat treatment?
False
True or false?
Oxy fuel, gas, cutting along rectangular steel plates always cause distortion?
False
What is the maximum temperature used to heat strengthening or forming low alloy steels?
650 Celsius
EXXXT – X what is the T stand for?
Flux core arc welding
In electrode, EXXXC – XMJ the M indicates what?
The letter M designate that the electrodes are classified using 75–80% argon, balance, CO2, shield and gas. When the M design designator does not appear, it’s signifies that either the shielding gas used for classification is 100% CO2 or that the electrode is self shielding
In the electrode, EXXXT – XMJ what does the J stand for?
The letter J designate that the electrode meets the requirements for improved toughness of 27J at -40°C. Absence of the letter J indicates normal impact requirements.
EXXXC – X what does the C stand for?
Metal core arc welding
In the electrode, EXXXC – XMJ- HZ what does the HZ indicate?
Optional designator indicates controlled hydrogen. Z indicates the number of ML or H per 100grams of positive metal. Z can have the values:2,4,8 or 16
In the electrode ER49S – X what does the S stand for?
Solid wire
In the electrode ER49S what does the R stand for?
Rod(for GTAW, PAW or OFW)
