welding safety

Worn motor bearings are most to result in a(n)___. continuous overload A high-level short circuit current may exceed ___. 50,000A` Accidental contact between an electrical conductor and a grounded enclosure is called a(n)___. ground fault Most arcing faults begin as ___. ground faults A plug fuse with a hexagonal cap has a maximum amperage rating of ___. 15A Under normal operation and at currents near its ampere rating, a fuse operates as a ___. conductor...

increase If the wire speed is increased during GMAW or FCAW work, the voltage must __________________________. tungsten In GTAW, the torch holds a (an) __________________ electrode. 120 When tapering the point on a tungsten electrode, use ______-grit grinding wheels or sanding belts for finishing. the wire to fuse to the tip If the welding voltage is set too high, the arc will be too long and could cause __________________________________________________________. ...

What is the purpose of a sealing fitting (seal off) To minimize the passage of gas vapors and flames through a conduit. What is article 344 of NEC Will be covering RMC or Rigid metal conduit What is one characteristic of aluminum conduit? It is more resistant to wet environments. When installing EMT or electrical metallic tubing it must? be supported every 10 feet EMT is often referred as? Thin wall type conduit. A type of conduit body with a 90° connecto...

NEC Article 250 ______. is the primary governing article for the proper use and installation of grounding and bounding. Suppose a loose connection has been exposed bare conductor and it contacts the edge of a metal enclosure. Is this an example of a short circuit or a ground fault? ground fault A single-phase system has two legs, Leg A and Leg B. If Leg A is carrying 50A and Leg B is carrying 45A, the current carried by the neutral is _____. 50A-45A=5A (Leg A- Leg B) Assu...

Which of the following is true with regard to switchboards Switchboards are used to subdivide large blocks of power When installing wiring within switchgear, use self adhesive cable ties every ___. 12" (300mm) The maximum voltage that a piece of equipment can withstand is known as its ____. Basic impulse insulation level (BIL) Bolted pressure switches are often used in place of ___. Circuit breakers A transformer's temperature rise rating refers to ___. The max...

NCCER Millwright Level II Module 7 Gaskets and Packing exam questions with 100% correct answers(verified for accuracy)

Welding current is transferred from the electrode holder, through the ___ and into the work Wire core of the electrode The harmful oxygen and hydrogen present in the atmosphere surrounding a molten weld is pushed away from the weld by the ____ created during the welding process Gaseous shield of carbon dioxide The purpose of the specifications written by the American welding society (aws) is to set standards that all manufacturers must follow when manufacturing ____ Welding cons...

no postweld cleaning is necessary Since there is no flux in GTAW welding, ____________________. rear deflector material and a face shield. When a hard hat is required while welding, use one that allows the attachment of _____________________. any welding or cutting Approved fire extinguishers must be available before ____________________. has little or no cleaning action Clean the steel plate before welding to remove mill scale, because the direct current electrode negat...

GTAW If you see the label TIG on a welding machine, that machine is considered to be what kind of welding machine? oxygen During the GTAW process, UV radiation in the atmosphere near the weld can ionize ___________________. direct current electrode negative (DCEN) GTAW is most commonly performed using ___________________. 1/2 inch High voltage, high frequency current creates a very stable arc that is able to jump a gap of about _____________________. arc starting ...

flux A shielding gas can be generated entirely from the ____________________ in the electrode core. (self shielded FCAW-S) rear deflector material If a hard hat is required for the environment, use one that allows the attachment of ____________________. flash sheids When preparing to practice welding, set up ____________________ around the welding area. 30 to 37 1/2 V-groove weld coupons must be beveled at _________to___________degrees for carbon steel or low alloy plate...