Metal Joining And Cutting Processes Ch 4

Question 1

Which of the following is a function of the flux coating of a SMAW electrode?

a. insulating
b. alloying
c. deoxidation
d. shielding
e. all of the above

Answer 1

e. all of the above

Question 2

In the AWS system of SMAW electrode designations, the next to the last digit refers to:

a. impact strength
b. electrode coating
c. welding position
d. strength
e. none of the above

Answer 2

c. welding position

Question 3

Which of the following is an incorrect statement about a SMAW electrode designated as
E7024?
a. It is a low hydrogen type.
b. The weld deposit has a minimum tensile strength of 70,000 psi.
c. It is suitable for use in the flat and horizontal fillet positions only.
d. It is an electrode for welding carbon steel.
e. none of the above

Answer 3

a. It is a low hydrogen type.

Question 4

Of the following which is not an essential part of a typical SMAW system?

a. constant current power supply
b. wire feeder
c. covered electrode
d. electrode lead
e. work (ground) lead

Answer 4

b. wire feeder

Question 5

Which of the following welding problems is the result of a distorted magnetic field that
deflects the welding arc?
a. cracks
b. short circuiting
c. arc blow
d. insufficient welding current
e. all of the above

Answer 5

c. arc blow

Question 6

Which of the following is not considered a type of metal transfer for GMAW?

a. short circuiting
b. spray
c. globular
d. droplet
e. pulsed arc

Answer 6

d. droplet

Question 7

Whch of the following types of metal transfer in GMAW provides the lowest amount of heat to the workpiece, and therefore prone to incomplete fusion?

a. short circuiting
b. spray
c. globular
d. droplet
e. pulsed arc

Answer 7

a. short circuiting

Question 8

Which of the following gases can be used as shielding gases for GMAW?

a. carbon dioxide
b. argon-oxygen
c. argon-carbon dioxide
d. argon
e. all of the above

Answer 8

e. all of the above

Question 9

Which type of welding process is this picture here?
a. SMAW
b.GMAW
c.FCAW
d.SAW
e.ESW

Answer 9

d.SAW

Question 10

Which of the following is not considered an arc welding process?

a. SMAW
b. GMAW
c. FCAW
d. ESW
e. none of the above

Answer 10

d. ESW

Question 11

In the electrode designation system for FCAW, the second digit (1) in an electrode marked
(E7 1 T-5) refers to:
a. strength
b. welding position
c. chemical composition
d. usability
e. none of the above

Answer 11

b. welding position

Question 12

Whlch of the following is not always an essential element of an FCAW system’?

a. constant voltage power supply
b. tubular electrode
c. wire feeder
d. external shielding gas
e. work (ground) lead

Answer 12

d. external shielding gas

Question 13

What aspect of the GTAW and PAW processes is different than for the other arc welding
processes?
a. nonconsumable electrode
b. power supply
c. shielding
d. all of the above
e. none of the above

Answer 13

a. nonconsumable electrode

Question 14

Shielding for the GTAW and PAW processes is primarily accomplished through the use of:

a. granular flux
b. slag
c. inert gas
d. oxygen
e. none of the above

Answer 14

c. inert gas

Question 15

A green stripe on a tungsten electrode designates:

a. pure tungsten
b. 1 % thoriated tungsten
c. 2% thoriated tungsten.
d. zirconiated tungsten
e. none of the above

Answer 15

a. pure tungsten

Question 16

When welding aluminum with the GTAW process, what type of welding current is most I commonly used?

a. DCEP
b. DCEN
c. AC
d. a and b above
e. b and c above

Answer 16

c. AC

Question 17

SAW and ESW processes are similar in that

a. both are an arc welding process
b. both use shielding gases
c. both use a granular flux, which becomes molten
d. a and b above
e. a and c above

Answer 17

c. both use a granular flux, which becomes molten

Question 18

The diagram below depicts what welding process?
a.SMAW
b.ESW
c.FCAW
d.SAW
e.GMAW

Answer 18

c.FCAW

Question 19

Solidification cracking due to improper width-to-depth ratio of the weld bead is a serious
problem primarily with which welding process?
a. SMAW
b. OFC
c. SAW
d. all of the above
e. none of the above

Answer 19

c. SAW

Question 20

Which one of the following processes is typically used in the flat position unless special
apparatus is employed?
a. GMAW
b. SAW
c. FCAW
d. SMAW
e. GTAW

Answer 20

b. SAW

Question 21

Which of the following are not common to both GTAW and PAW?

a. nonconsumable tungsten electrode
b. constricting orifice
c. shielding gas nozzle
d. externally applied filler metal
e. none of the above

Answer 21

b. constricting orifice

Question 22

What technique is employed with PAW to produce full penetration welds without edge
preparation?
a. stringer beads
b. weave beads
c. keyhole
d. backstep
e. none of the above

Answer 22

c. keyhole

Question 23

What welding process produces welds in a single pass, with the progression vertically upward
along the joint?
a. SAW
b. ESW
c. FCAW
d. a and b above
e. b and c above

Answer 23

b. ESW

Question 24

Which of the following is not an advantage of the ESW process?

a. high deposition rate
b. ease of setup
c. capable of joining thick sections
d. no tendency for angular distortion
e. none of the above

Answer 24

b. ease of setup

Question 25

Which welding process is considered to be a chemical welding process? a. SMAW b. ESW c. SAW d. OAW e. none of the above

Answer 25

d. OAW

Question 26

Which arc welding process provides a very efficient means of joining attachments to some planar surface? a. OAW b. SW c. GMAW d. GTAW e. SMAW

Answer 26

b. SW

Question 27

Brazing differs from welding in that: a. no filler metal is used b. an oxyfuel flame is used c. the base metal is not melted d. all of the above e. none of the above

Answer 27

c. the base metal is not melted

Question 28

For satisfactory results, a braze joint should have: a. clean joint surfaces b. a small clearance between pieces to be joined c. a large surface area for the joint area d. heat source e. all of the above

Answer 28

e. all of the above

Question 29

Which of the following is an advantage of brazing? a. ease of joining thick sections b. ability to join dissimilar metals c. ability to join thin sections d. a and b above e. b and c above

Answer 29

e. b and c above

Question 30

Of the following metals, which cannot be efficiently cut using OFC? a. high-carbon steel b. low-carbon steel c. medium-carbon steel d. austenitic stainless steel e. none of the above

Answer 30

d. austenitic stainless steel

Question 31

Which of the following gases can be used to perform OFC? a. methylacetylene - propadiene (MPS) b. propane c. acetylene d. methane (natural gas) e. all of the above

Answer 31

e. all of the above

Question 32

Which of the following cutting processes can cut any metal? a. OFC b. CAC-A c. PAC d. a and b above e. b and c above

Answer 32

e. b and c above

Question 33

The width of a cut is referred to as the: a. gap b. dross c. kerf d. drag e. none of the above

Answer 33

c. kerf

Question 34

The SMAW power supply can be: a. DCEN b. AC c. DCEP d. all of the above e. a and c above

Answer 34

d. all of the above

Question 35

Of the following, which is a noncontact welding process, requiring no electrodes and is not influenced by the presence of magnetic fields? a. ESW b. PAW c. LBW d. a and b above e. none of the above

Answer 35

c. LBW

Question 36

Which of the following uses a focused beam of electrons as a heat source for fusion welding? a. EBW b. ESW c. EGW d. a and c above e. none of the above

Answer 36

a. EBW