Welding True and False

Question 1

In any welded structure it is desirable that butt joints should be used wherever possible.

Answer 1

true

Question 2

Visual, radiographic, and ultrasonic examinations are common nondestructive testing methods.

Answer 2

true

Question 3

Visual inspection of welds is routine procedure, and surface defects are quickly noticed by an experienced inspector.

Answer 3

true

Question 4

It is easier to obtain watertightness and oiltightness with welded joints.

Answer 4

true

Question 5

Riveted construction requires less skilled labor compared to a welded construction.

Answer 5

false

Question 6

Fusion welding is achieved by means of a heat source which is intense enough to melt the edges of the material to be joined as it is traversed along the joint.

Answer 6

true

Question 7

Gas welding, arc welding, and resistance welding all provide heat sources of sufficient intensity to achieve fusion welds.

Answer 7

true

Question 8

The most common gas used to produce a high temperature flame in gas welding is Hydrogen.

Answer 8

false

Question 9

In electric arc welding, the flux cored wires (FCAW) are often used in mechanized welding allowing higher deposition rates and improved quality of weld.

Answer 9

true

Question 10

Stud welding may be classified as a shielded arc process, the arc being drawn between the stud (electrode) and the plate to which the stud is to be attached.

Answer 10

true

Question 11

Gas shielded arc welding processes could be used for the welding of aluminum alloys.

Answer 11

true

Question 12

In mild steel the weld tends to have a lower yield strength than the plate material.

Answer 12

false

Question 13

Tungsten Inert Gas (TIG) is a welding process usually used for welding very thick steel plates (more than 10 mm).

Answer 13

false

Question 14

The sequence of metal transfer in dip transfer process are: Establish the arc; wire fed into arc until it makes contact with plate; resistance heating of wire in contact with plate; pinch effect, detaching heated portion of wire as droplet of molten metal; Re-establish the arc.

Answer 14

true

Question 15

In making a butt weld with manual arc welding, where the plate thickness exceeds 5 to 6 mm (~1/4”), it is necessary to make more than one welding pass to deposit sufficient weld metal to close the joint.

Answer 15

true

Question 16

With higher current automatic welding processes, thicker plates may be welded with a single pass, but at greater thicknesses multi-pass welds become necessary

Answer 16

true

Question 17

Fillet welds may be continuous or intermittent depending on the structural effectiveness of the member to be welded.

Answer 17

true

Question 18

On thinner plates, it is necessary to bevel the edges of plates which are butted together to achieve complete penetration of the weld metal.

Answer 18

false

Question 19

To reduce distortion and limit the residual stresses in the structure, it is important that a correct welding sequence be utilized throughout construction.

Answer 19

true

Question 20

At T intersections it is necessary to weld the butt first fully, and then gouge out the ends to renew the seam edge preparation before welding the seam.

Answer 20

true

Question 21

In repair work correct welding sequences are NOT important, and the procedure does NOT follow the general pattern for butts and seams in plate panels.

Answer 21

false