T/F PPE glasses/goggles must have Z87 or Z87+ marked on the frame
True
T/F Roll up sleeves and tuck in pant legs when wearing boots to prevent burns
False
T/F Any welding lens shade is permissible for all types of welding applications
False
T/F Infrared (IR) radiation cannot be felt
False
In most lab shops choosing shoes that are_______the ankle is the better choice
Above
T/F Cylinders must be secured and in the upright position when storing and using
True
T/F Regulators can be in place when moving cylinders
False
Protect cylinders from heat, mechanical shock and_______
Arcs
T/F Arc blow occurs when a magnetic field is developed while welding and causes the arc to move in an unpredictable manner
True
T/F The primary purpose of a shielding gas being present during the welding process is to protect the molten puddle from atmospheric contamination
True
T/F The amount of heat generated by GMAW arc is a function of both wire feed speed and the diameter of the wire
True
T/F A long arc length will decrease the arc voltage
False
T/F Using a weave pattern while placing a bead will increase the amount of heat in the weldment
True
Which polarity does not cause (magnetic) arc blow?
AC
Argon can be used as a shielding gas for the following processes
GMAW, GTAW, FCAW
With SMAW and a given amperage, which polarity will provide the deepest penetration of the bead?
DCEP
Which one of the following processes does a welder have some choice in the polarity selected for a given process electrode?
GTAW
T/F An edge joint is formed with two overlapping materials. The edges create fillet welds
False
T/F Reinforcement refers to the depth of the penetration
False
T/F Restricted position means that the welder's positioning when welding pipe is resticed. Areas to be welded are difficult to reach
True
T/F When a weld symbol is both above and under the reference line, it means that welds are to be completed on both sides of the joint
True
T/F Pipe welding is comprised mostly of fillet welds
False
T/F A T-joint in the flat position is placed on the welding table so each plate is at a 45-degree angle to the table
True
T/F A double bevel groove weld has a bevel on both sides of only one plate
True
T/F A lap joint creates the geometry for fillet welds
True
T/F A 3F weld is a fillet weld completed in the horizontal position
False
The edges of a weld are the?
Toes
A_________joint is between two pieces of material that are aligned edge to edge in the same plane
Butt
For welding certification, a flat welding position groove is?
1G
If the weld symbol is_______the reference line, then the weld is to be completed on the side that the arrow is pointing to
Below
Which of the following identifies pipe positioned at a 45-degree angle?
6G
Cutting tips are made out of which alloy?
Copper or chrome plated
What could happen if acetylene was used with the wrong tip?
The tip could overheat causing a backfire, backlash, or explosion
What is the most widely used fuel gas used for cutting?
Acetylene
T/F The distance from the tip of the electrode to the base material being welded is arc length
True
T/F The SMAW process only uses AC polarity
False
T/F Alternating current (AC) is the preferred type of current for welding for SMAW
False
T/F The stops and re-starts necessary with SMAW electrodes increases the risk of weld defects
True
The most basic type of welder is?
Transformer
Which of the following is not part of the welding electrical circuit
None of the above
The transformer inside a welding power source converts high voltage, low amperage electricity into________electricity for welding
Low voltage, high amperage
To increase the penetration of a bead, you should select which welding polarity?
DCEP
Which polarity is also referred to as reverse polarity?
DCEP
Changes in the welding arc length will also change the following electrical characteristics?
Voltage
T/F Metals are joined using the arc welding process when two pieces of metal are heated to their melting point and additional metal is added to the molten puddle. This molten mass cools and solidifies into one solid piece
True
T/F DCEN polarity is used when welding in the GMAW process
False
T/F The loss of shielding gas when welding outdoors can cause weld failures as a result of porosity, lack of fusion, and other undesirable discontinuities in the weld
True
T/F GMAW is suitable for use on just one few different metals
False
T/F GMAW exclusively uses inert shielding gas
False
A constant voltage system strives to keep which variables constant
Arc length
How is current carried to the arc in the GMAW process
The electrode is energized by the contact tip that then carries the current to the arc