30
Welding NOCTI Study Guide

NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

Embed Size (px)

Citation preview

Page 1: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

Welding

NOCTI Study Guide

Page 2: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

1. A class A fire extinguisher can be safely used on a/an ________ fire.

a) b) c) d)

0% 0%0%0%

a) Woodb) Greasec) Electrical d) Magnesium

Page 3: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

2. When welding in a confined space, the welder must have 

a) b) c) d)

0% 0%0%0%

a) All equipment in the confined space

b) A second welder inside the space

c) An approved breathing device

d) A watchperson outside the space

Page 4: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

3. When medium gas welding, a number _______ filter lens should be used. 

a) b) c) d)

0% 0%0%0%

a) 2b) 4c) 6d) 8

Page 5: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

4. On a drawing with a scale of 1‐inch equals 15‐feet, a line _______ inches represents 40 feet.

a) b) c) d)

0% 0%0%0%

a) 1.27‐inchesb) 1.45‐inchesc) 2.67‐inchesd) 2.85‐inches

Page 6: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

5. Information contained in the tail of a welding symbol might include 

a) b) c) d)

0% 0%0%0%

a) Type of weldb) Location of weldc) Welding dimensionsd) Welding process

Page 7: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

6. Referring to the symbol below, the flag signifies a _________ weld

a) b) c) d)

0% 0%0%0%

o

a) Fieldb) Filletc) Beveld) Groove

Page 8: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

7. A neutral oxygen‐acetylene flame has a temperature range of

a) b) c) d)

0% 0%0%0%

a) 500 to 550 ˚Fb) 580 to 630 ˚Fc) 5000 to 5500 ˚Fd) 5800 to 6300 ˚F

Page 9: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

8. Use the same style cutting tip for both natural gas and 

a) b) c) d)

0% 0%0%0%

a) Acetyleneb) Propanec) Propylened) Mapp

Page 10: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

9. When opening an acetylene cylinder, rotate the cylinder valve a maximum of

a) b) c) d)

0% 0%0%0%

a) ½ turnb) 1 turnc) 1½ turnsd) 2 turns

Page 11: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

10. Electrodes used for CAC‐A are made of graphite or

a) b) c) d)

0% 0%0%0%

a) Brassb) Carbonc) Magnesiumd) Steel

Page 12: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

11. In air carbon arc cutting, compressed air is used to

a) b) c) d)

0% 0%0%0%

a) Cool the work pieceb) Dislodge molten 

materialc) Oxidize with fueld) Provide ventilation

Page 13: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

12. Which of the following is a ferrous metal?

a) b) c) d)

0% 0%0%0%

a) Aluminumb) Ironc) Copperd) Gold

Page 14: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

13. The process of heating a metal and slow cooling it in order to toughen it and reduce brittleness is known as

a) b) c) d)

0% 0%0%0%

a) Temperingb) Carbonizingc) Annealingd) Smelting

Page 15: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

14. The ability of a metal to withstand shock loading is known as its

a) b) c) d)

0% 0%0%0%

a) Toughnessb) Hardnessc) Ductilityd) Malleability

Page 16: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

***15. In the graphic below, the part of the grooved weld known as the toe is the part labeled number(NOT ENOUGH INFO IN PICTURE – SKIP)

a) b) c) d)

0% 0%0%0%

a) 1b) 2c) 3d) 4

Page 17: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

16. If one pound of E‐6010 SMAW electrode costs $0.452 per pound, 80 pounds would cost 

a) b) c) d)

0% 0%0%0%

a) $34.27b) $36.16c) $38.53d) $40.12

Page 18: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

17. What is the measurement on the 1‐inch scale below? 

a) b) c) d)

0% 0%0%0%

a) 1/16b) ⅛c) 3/16d) ¼

Page 19: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

18. When using reverse polarity, the electrode will be

a) b) c) d)

0% 0%0%0%

a) Positiveb) Negativec) Alternatingd) Neutral

Page 20: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

19. When a transformer type welding machine with a rectifier is in operation, the electrode is supplied with 

a) b) c) d)

0% 0%0%0%

a) Alternating currentb) Direct currentc) Higher amperagesd) Higher voltages

Page 21: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

20. What is the tensile strength of an E6012 electrode? 

a) b) c) d)

0% 0%0%0%

a) 600 psib) 6000 psic) 60,000 psid) 600,000 psi

Page 22: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

21. A common welding problem is poor penetration.  One of the causes of this problem is

a) b) c) d)

0% 0%0%0%

a) Electrode too smallb) Parts clamped 

incorrectlyc) Current too lowd) Arc too long

Page 23: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

22. In GMAW and FCAW, __________ or carbon dioxide is added to the shielding gas to improve arc stability and weld 

puddle fluidity.

a) b) c) d)

0% 0%0%0%

a) Oxygenb) Nitrogenc) Hydrogend) Helium

Page 24: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

23. In GMAW, pieces of electrode sticking to the weld joint are known as

a) b) c) d)

0% 0%0%0%

a) Projectorsb) Stragglersc) Hairlinesd) Whiskers

Page 25: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

24. One possible type of metal transfer when employing the GMAW consumable electrode process is ____________ 

transfer.

a) b) c) d)

0% 0%0%0%

a) Constantb) Circuitedc) Intermittentd) Globular

Page 26: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

25. On GMAW welding machine controls, the wire feed speed is used to control

a) b) c) d)

0% 0%0%0%

a) Voltageb) Amperagec) Polarityd) Resistance

Page 27: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

26. A consumable in the GTAW process would include

a) b) c) d)

0% 0%0%0%

a) Colletsb) Gas linesc) Regulatorsd) Torch hoses

Page 28: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

27. A constant current power supply is required for 

a) b) c) d)

0% 0%0%0%

a) GMAWb) GTAWc) FCAWd) SAW

Page 29: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

28. An example of an inert gas is

a) b) c) d)

0% 0%0%0%

a) Heliumb) Oxygenc) Chlorined) Nitrogen dioxide

Page 30: NOCTI Study Guide - Career Tech PA Learning Conference... · Welding NOCTI Study Guide. 1. ... material c) Oxidize with fuel d) ... When a transformer type welding machine with a

29. In GTAW of aluminum, the most common shielding gas used is 

a) b) c) d)

0% 0%0%0%

a) Pure argonb) 75% argon / 25% heliumc) 10% argon / 90% heliumd) Pure helium