California CSLB C-60 Welding Examination

A job requires 3 tons of structural steel. The supplier charges $42 per 100 pounds. What is the total cost?

• A$2,520
• B$2,100
• C$1,890
• D$2,940

What is the minimum steel thickness covered by AWS D1.1 Structural Welding Code – Steel?

• A1/8 inch
• B1/16 inch
• C3/16 inch
• D1/4 inch

When spark-testing an unknown metal with a grinder, mild steel produces sparks that are:

• Amoderate in volume with relatively few forks
• Bshort, dull red, and dart-shaped with no forking
• Clong, dense, and heavily forked
• Dvery short with almost no spark stream

According to AWS A2.4, when a weld symbol is placed above the reference line, the weld is to be made on the:

• Aarrow side of the joint
• Bother side of the joint
• Cboth sides of the joint
• Deither side at the welder's discretion

A 4 ft by 8 ft sheet of 1/4 inch steel plate weighs approximately how much? (Steel at 1/4 inch weighs about 10.2 lb/ft².)

• A326 pounds
• B245 pounds
• C408 pounds
• D163 pounds

On a welding symbol, a flag at the junction of the arrow and reference line indicates:

• Aa weld made in the field (not in the shop)
• Ba weld applied all the way around the joint
• Ca flush contour weld
• Da weld with backing

A job requires depositing 35 pounds of weld metal. The electrode deposition efficiency is 90%. How many pounds of electrode must be ordered?

• A39 pounds
• B35 pounds
• C31.5 pounds
• D42 pounds

Stainless steel can be distinguished from mild steel because stainless steel is:

• Anon-magnetic or only weakly magnetic and resists corrosion
• Bheavily magnetic and rusts readily
• Cproduces long dense forked sparks when ground
• Dmuch lighter in weight than mild steel

When selecting filler metal for welding carbon steel, the filler metal should:

• Amatch or slightly exceed the tensile strength of the base metal
• Balways be one grade stronger than the base metal regardless of application
• Cbe lower in tensile strength than the base metal for ductility
• Dmatch the chemical composition of the base metal exactly

A drawing shows a fillet weld symbol with 5/16 to its left, and the symbol sits below the reference line. This indicates a 5/16 inch fillet weld:

• Aon the arrow side of the joint
• Bon the other side of the joint
• Con both sides of the joint
• Das an all-around weld

A job requires 80 hours of welding at a gas flow rate of 35 CFH using 250 CF cylinders of 75% argon/25% CO2. How many cylinders should be ordered?

• A12 cylinders
• B11 cylinders
• C8 cylinders
• D14 cylinders

Under AWS D1.1, a prequalified welded joint means:

• Athe joint design, process, and parameters are prequalified and do not require procedure q…
• Bthe welder does not need to be certified
• Cthe joint can be used for any thickness of material
• Dthe joint does not require inspection

Aluminum can be distinguished from steel because aluminum is:

• Amuch lighter in weight, non-magnetic, and produces no sparks when ground
• Bheavier than steel and strongly magnetic
• Cproduces the longest sparks of any metal when ground
• Drusts rapidly when exposed to air

The primary document governing structural steel welding requirements, joint design, and inspection is:

• AAWS D1.1 Structural Welding Code – Steel
• BAWS D1.3 Structural Welding Code – Sheet Steel
• CAWS D1.6 Structural Welding Code – Stainless Steel
• DAWS Z49.1 Safety in Welding

A job requires 240 welds at 0.5 hours each, with four welders working. What is the total labor required?

• A120 labor-hours
• B60 labor-hours
• C240 labor-hours
• D480 labor-hours

A drawing shows a single-V groove symbol with a 60° bevel angle and a 1/8 inch root opening. This describes:

• Aa groove weld with V-shaped preparation and a small gap at the root
• Ba fillet weld with a 1/8 inch leg
• Ca plug weld with a 60-degree taper
• Da surfacing weld with a V-shaped bead

A Welding Procedure Specification (WPS) is a document that:

• Agives the welding variables required to produce a sound weld for a given application
• Bcertifies that a welder is qualified to weld
• Creplaces AWS D1.1 for structural work
• Drecords the results of weld inspection

Before welding, the base metal surfaces within the weld area should be cleaned to remove:

• Amill scale, rust, oil, paint, and moisture
• Bonly the mill scale
• Conly the moisture
• Donly the paint

For SMAW with a 1/8 inch E7018 electrode on 1/4 inch plate, a typical starting amperage range is:

• A90–140 amps
• B40–70 amps
• C200–280 amps
• D15–30 amps

When beveling plate edges for a complete-joint-penetration groove weld, the purpose of the bevel is to:

• Aallow the weld bead to reach the root of the joint for full penetration
• Bsave filler metal by reducing weld volume
• Cadd a decorative finish to the weld
• Dstrengthen the plate by work-hardening the edge

The primary purpose of a tack weld is to:

• Ahold the parts in proper alignment and root opening before final welding
• Bprovide permanent strength to the joint
• Cseal the joint against moisture
• Dreplace the root pass

For GMAW with short-circuiting transfer on carbon steel, a typical shielding gas flow rate is:

• A25–35 CFH
• B5–10 CFH
• C80–100 CFH
• D100–150 CFH

A general rule for selecting SMAW electrode diameter is that the electrode diameter should not exceed:

• Athe thickness of the base metal being welded
• Bhalf the thickness of the base metal
• Ctwice the thickness of the base metal
• Dthe diameter of the root opening

Per AWS D1.1, when the root opening of a fillet weld in a T-joint exceeds the as-detailed fit-up tolerance, the required fillet weld size must be:

• Aincreased by the amount the root opening exceeds the permitted tolerance
• Bdecreased by the amount of the excess root opening
• Cleft unchanged since root opening does not affect fillet size
• Ddoubled regardless of the actual opening

A weld is made at 25 volts, 180 amps, with a travel speed of 12 in/min. What is the heat input in joules per inch?

• A22,500 J/in
• B18,000 J/in
• C27,000 J/in
• D15,000 J/in

For SMAW with E7018 electrodes on carbon steel, the correct polarity is:

• ADCEP (electrode positive, reverse polarity)
• BDCEN (electrode negative, straight polarity)
• CAC only
• Deither AC or DCEP interchangeably

The standard bevel angle for a single-V groove weld on carbon steel is typically:

• A30° per side (60° included angle)
• B45° per side (90° included angle)
• C15° per side (30° included angle)
• D60° per side (120° included angle)

Per AWS D1.1, tack welds that are incorporated into the final weld must:

• Ahave their surfaces cleaned to the same standard as the joint and be free of cracks and o…
• Bbe left in place without cleaning since they will be remelted
• Cbe ground flush regardless of location
• Dbe made with a smaller electrode than the production welds

For GMAW, the wire feed speed primarily controls:

• Athe amperage (deposition rate)
• Bthe voltage
• Cthe travel speed
• Dthe shielding gas flow

AWS D1.1 requires removal of mill scale from the weld zone unless:

• Athe mill scale is so thin and tightly adhered that it does not affect weld quality
• Bthe mill scale is always required to be removed regardless of thickness
• Cmill scale may always remain since it is part of the steel
• Dmill scale only needs to be removed when welding stainless steel

The purpose of a backing bar (or backing strip) in a groove weld is to:

• Asupport the root pass and prevent weld metal from falling through the joint
• Badd strength to the completed weld
• Ccool the weld faster to reduce distortion
• Dshield the back of the weld from atmospheric contamination

For 1/8 inch thick sheet steel, the most suitable joint preparation for a complete-joint-penetration weld is:

• Asquare groove with a small root opening
• Bsingle-V with 60° bevel
• Cdouble-V with 60° bevel
• DJ-groove with 20° bevel

When setting up GMAW with short-circuit transfer, increasing the inductance control will:

• Areduce spatter and soften the arc
• Bincrease spatter and stiffen the arc
• Cincrease travel speed
• Dreduce wire feed speed

A welder runs GMAW at 30 CFH for 4 hours on a job. How many cubic feet of shielding gas are consumed?

• A120 CF
• B30 CF
• C90 CF
• D150 CF

For GMAW with 0.035 inch wire, the correct contact tip size is:

• A0.035 inch
• B0.030 inch
• C0.045 inch
• D0.025 inch

Preheating carbon steel before welding is primarily done to:

• Areduce the cooling rate and prevent hydrogen-induced cracking
• Bincrease the cooling rate to harden the weld
• Cadd strength to the base metal
• Dimprove the appearance of the weld bead

In a groove weld, the root face (also called the land) refers to:

• Athe unwelded portion of the groove face adjacent to the root that limits the root opening
• Bthe depth of the groove from the surface
• Cthe distance from the root to the toe of the weld
• Dthe radius at the bottom of a J- or U-groove

With FCAW, the stickout (electrode extension) is the distance from the contact tip to the:

• Aarc/work, and increasing it lowers amperage
• Barc/work, and increasing it raises amperage
• Cgas diffuser, and does not affect amperage
• Dwire spool

After cleaning oily or painted steel with a solvent before welding, the surface must be:

• Acompletely dry before welding, because solvent residue can produce toxic fumes and porosi…
• Bwelded immediately while wet for best results
• Cheated to drive the solvent into the metal
• Drecoated with oil to prevent rust

SMAW stands for:

• AShielded Metal Arc Welding
• BSubmerged Metal Arc Welding
• CShielded Mild Arc Welding
• DSolid Metal Arc Welding

A key advantage of FCAW over SMAW is:

• Ahigher deposition rate and continuous wire feed without stub-end waste
• Bno need for shielding gas or flux
• Clower equipment cost
• Dno slag to remove

In GMAW, the four basic metal transfer modes are:

• Ashort-circuiting, globular, spray, and pulsed-spray
• Bshort-circuiting, droplet, spray, and burst
• Cdip, spray, arc, and pulse
• Dshort-circuiting, globular, spray, and arc-blast

With FCAW, the best way to control excessive spatter is to:

• Ashorten the stickout
• Bincrease the wire feed speed
• Cincrease the gas flow rate
• Duse a larger contact tip

GTAW uses a non-consumable electrode made of:

• Atungsten
• Bsteel
• Ccopper
• Dcarbon

In the SMAW electrode classification E7018, the 70 indicates:

• Aminimum tensile strength of 70,000 psi
• Bthe minimum yield strength of 70,000 psi
• Cthe operating amperage of 70 amps
• Dthe electrode diameter in thousandths of an inch

A stringer bead differs from a weave bead in that a stringer bead:

• Ais deposited with little or no transverse oscillation, suitable for thin material and out…
• Buses wide side-to-side oscillation to cover a wide area in a single pass
• Cis used only for the cover pass of a groove weld
• Dis used only with low-hydrogen electrodes