202 ab review

Question 1

What safety device is used on a shielding gas cylinder?

A. plastic rupture disc
B. metal rupture disc
C. plastic fusible plug
D. metal fusible plug

Answer 1

B. metal rupture disc

Question 2

Which gas will be formed by the reaction between GTAW ultraviolet light and air?

A. CO (carbon monoxide)
B. CO 2 (carbon dioxide)
C. O 3 (ozone)
D. SO 2 (sulphur dioxide)

Answer 2

C. O 3 (ozone)

Question 3

Which safety precaution should be taken to avoid accidental arcing of tungsten electrode when not in use?

A. torch should be wrapped and hung on insulated holder
B. disconnect ground
C. turn power source off
D. turn gas valve off

Answer 3

C. turn power source off

Question 4

By keeping the end of the gas nozzle clean and uniform, what will it help to avoid?

A. a retarded gas flow
B. turbulence in the gas flow
C. arc hunting across the puddle
D. undercutting at bead edges

Answer 4

B. turbulence in the gas flow

Question 5

Voltage is the pressure needed to push the amperage through the conductor:

A. True
B. False

Answer 5

A. True

Question 6

Which is an advantage of GTAW spot welding?

A. it reduces distortion
B. no power source is required
C. crater cracking is not a problem
D. all of the above

Answer 6

A. it reduces distortion

Question 7

Which type of AC welding machine feature provides a stable arc for welding aluminum?

A. Balance wave control
B. Pulsed high voltage injection
C. High frequency
D. All of the above

Answer 7

D. All of the above

Question 8

When does high amperage GTAW have an advantage?

A. high deposition rates are required
B. welding root passes on carbon steel pipe
C. welding fill passes on carbon steel pipe
D. position welding on carbon steel pipe

Answer 8

B. welding root passes on carbon steel pipe

Question 9

What is one responsibility of a”torch cap” that is used on a GTAW torch?

A. avoid accidental arcing
B. prevent amperage loss
C. keep the torch cleaned and cool
D. control electrode contamination

Answer 9

A. avoid accidental arcing

Question 10

Gas nozzles for GTAW are numbered according to which dimension?

A. overall length
B. outside diameter
C. inside diameter
D. maximum amperage x 100

Answer 10

C. inside diameter

Question 11

What shade of flash glasses would be suitable when in an area used for GTAW?

A. 2
B. 4
C. 8
D. 10

Answer 11

A. 2

Question 13

What will happen to a GTAW torch that is too small for the current used?

A. it will overheat the electrode
B. it will overheat the torch body
C. it will overheat the power source
D. it will overheat the ceramic nozzle

Answer 13

B. it will overheat the torch body

Question 14

What is the rate of pulsation when welding with high frequency pulse GTAW?

A. 25 to 100 times per second
B. 50 to 100 times per second
C. 100 to 400 times per second
D. 200 to 500 times per second

Answer 14

D. 200 to 500 times per second

Question 15

Which design of consumable insert would be used on a Vee or U groove?

A. rectangular
B. J
C. K
D. inverted T

Answer 15

D. inverted T

Question 16

Consumable inserts meet which AWS specification?

A. 5.18
B. 5.2
C. 5.28
D. 5.30

Answer 16

D. 5.30

Question 18

Which of the following is a disadvantage of using hydrogen as a shielding gas for GTAW of carbon steel?

A. causes embrittlement
B. under cuts bead sidewalls
C. tends to oxidize
D. deteriorates tungsten

Answer 18

A. causes embrittlement

Question 19

What may tungsten be alloyed with when used for GTAW?

A. cerium oxide
B. thorium oxide
C. zirconium oxide
D. all of the above

Answer 19

D. all of the above

Question 20

Which of the following would be a good selection for a green coded electrode?

A. D.C. reverse polarity on mild steel
B. D.C. straight polarity on magnesium
C. A.C. high frequency start on stainless steel
D. A.C. continuous high frequency on aluminum

Answer 20

D. A.C. continuous high frequency on aluminum

Question 21

What is one method used to prepare GTAW electrodes?

A. chemically
B. filing
C. oxy fuel torch
D. emery cloth

Answer 21

A. chemically

Question 22

In the AWS designation ER 309, what does the “R” represent?

A. round
B. rod
C. rated
D. registered

Answer 22

B. rod

Question 23

What is the color code for a EWP GTAW electrode?

A. red
B. green
C. yellow
D. brown

Answer 23

B. green

Question 24

When welding with GTAW which factor does NOT affect weld position?

A. tensile strength
B. wire diameter
C. shielding gas
D. joint design

Answer 24

A. tensile strength

Question 25

Which section of the AWS code are Low carbon steel filler metals for GTAW, GMAW, PAW specified in? A. AWS - A5.1 B. AWS - A 5.18 C. AWS - A 5.2 D. AWS - A 5.28

Answer 25

B. AWS - A 5.18

Question 26

What is ER4043 an alloy of? A. iron and chromium B. copper and nickel C. iron, molybdenum and nickel D. aluminum and silicon

Answer 26

D. aluminum and silicon

Question 27

Which of the following is NOT a method to prepare tungsten electrodes? A. chemically B. emery cloth C. electric arc D. grinding

Answer 27

B. emery cloth

Question 28

hat does the term "inert" refer to? A. the ability of a gas to combine chemically B. the ability of a gas to not combine chemically C. a gas that is reactive D. a gas that is active

Answer 28

B. the ability of a gas to not combine chemically

Question 29

What does the AWS electrode classification system use to identify electrodes for GTAW? A. numbers only B. numbers and colors C. color code D. all of the above

Answer 29

B. numbers and colors

Question 30

What is the term for a vessel that contains a cryogenic liquid? A. demister B. dumpster C. dewar D. crucible

Answer 30

C. dewar

Question 31

Shielding gases which contain oxidizing gases may NOT be used in which process? A. GMAW B. FCAW C. GTAW D. all of the above

Answer 31

C. GTAW

Question 32

What would the designation ER347 tell a welder? A. that it is a stainless steel GTAW rod B. that it is an aluminum bare electrode C. that it is an alloy steel rod for gas or GTAW D. the it is an electric rod with 34700 psi tensile strength

Answer 32

A. that it is a stainless steel GTAW rod