exam 4

Question 1

Which of the following best describes a 3F weld?
A) The surface of the plates are in the horizontal position.
B) Gravity is helpful when performing the weld.
C) The plates to be welded are approximately 45° off horizontal.
D) The progression of the weld is always uphill.

Answer 1

D) The progression of the weld is always uphill.

Question 2

Which of the following is a characteristic of a short arc length?
A) Puddle blends well at edge of bead.
B) Wide fluid puddle.
C) A low rate of deposition.
D) Deeper penetration.

Answer 2

D) Deeper penetration.

Question 3

Three major types of stainless steels are:
A) Austenitic, Martensitic, Simplitic
B) Austenitic, Formic, Simplitic
C) Austenitic, Ferritic, Martensitic
D) Austenitic, Ferritic, Simplitic

Answer 3

C) Austenitic, Ferritic, Martensitic

Question 4

A short arc length promotes deeper penetration of the weld.
A) True
B) False

Answer 4

A) True

Question 5

What is the area of metal that is removed to form a square face on a butt joint called?
A) Plane.
B) Weave.
C) Fillet.
D) Land.

Answer 5

D) Land.

Question 6

As a general rule, the arc length for SMAW is ____ times the diameter of the core of the wire electrode .
A) 0.5
B) 1
C) 1.5
D)2

Answer 6

B) 1

Question 7

Properly applied wire rope clips will develop approximately ____ percent of the wire rope strength.
A) one hundred
B) eighty
C) fifty
D) zero

Answer 7

B) eighty

Question 8

Which of the following cast iron types is formed by an annealing process that causes carbon to form into rounded particles?
A) Gray cast.
B) White cast.
C) Malleable cast.
D) Nodular cast.

Answer 8

C) Malleable cast.

Question 9

A temperature crayon contaminating the weld arc and cause:
A) Spatter
B) Porosity
C) Hot cracking
D) Slagging

Answer 9

C) Hot cracking

Question 10

The discovery of stainless steels dates back to the:
A) early 1800s
B) early 1880s
C) early 1900s
D) early 1930s

Answer 10

C) early 1900s

Question 11

When following the AWS specification A5.30, the letters “IN” designate a consumable insert.
A) True
B) False

Answer 11

A) True

Question 12

Very high carbon steel:
A) responds well to heat treatment
B) is used where increased wear resistance is required.
C) is more difficult to form than higher carbon steels.
D) accounts for the largest tonnage of steel used in industry.

Answer 12

A) responds well to heat treatment

Question 13

When hoisting the following load, what is the tension on the slings marked “a”?
A) 500kg
B) 250 kg
C) 154 kg
D) 354 kg

Answer 13

D) 354 kg

250 x 1.414 = 353.5

Question 14

The maximum safe working pressure for acetylene is ____ kPa.
A) 200
B) 193
C) 159
D) 103

Answer 14

D) 103

Question 15

When hoisting the following load, what is the tension on the slings marked “a”?
A) 500 kg
B) 250 kg
C) 150 kg
D) 100 kg

Answer 15

B) 250 kg

Question 16

What is compressive strength?
A) lt is the resistance of material to a force, tending to deform or fail it by crushing.
B) It is usually measured with a punch and die set
C) It is the ultimate pull a material will stand without fracture.
D) It is the stress point at which permanent deformation takes place.

Answer 16

A) lt is the resistance of material to a force, tending to deform or fail it by crushing.

Question 17

What is a common method of classifying carbon steels?
A) Based on ductility.
B) Based on carbon content.
C) Based on tensile strength.
D) Based on malleability.

Answer 17

B) Based on carbon content.

Question 18

Which of the following conductors would have the largest amount of resistance?
A) Small diameter but very long.
B) Small diameter but very short.
C) Large diameter but very long.
D) Large diameter but very short.

Answer 18

A) Small diameter but very long.

Question 19

Cobalt is:
A) known to have the property of red hardness.
B) known to improve oxidation resistance.
C) used as an alloying element to increase strength and toughness at low temperatures.
D) used as a deoxidizer in steel production.

Answer 19

A) known to have the property of red hardness.

Question 20

Which of the following alloys ‘ is not considered a nickel base alloy?
A) Nimonic
B) lncoloy
C) Hastelloy
D) Monel

Answer 20

B) lncoloy

Question 21

When referring to the torch inclination of a cutting torch you can say that it is the angle of the torch relative to the:
A) direction of travel.
B) metal angle.
C) angle of weld.
D) torch tip.

Answer 21

A) direction of travel.

Question 22

22. The thickest steel would be cut using a cutting tip number:
    A) 1
    B) 3
    C) 5
    D) 7

Answer 22

D) 7

Question 23

Which is the correct order of operations for continuous casting?
A) Rolling mill, tundish, spray chamber, strand.
B) Tundish, strand, spray chamber, rolling mill.
C) Strand, spray chamber, tundish, rolling mill.
D) Tunwsh, rolling mill, strand, spray chamber.

Answer 23

B) Tundish, strand, spray chamber, rolling mill.

Question 24

Oil and grease must be kept away from oxygen because it:
A) makes a messy work place.
B) can become explosive.
C) will contaminate the oxygen.
D) combines to fonn a greasy oxide.

Answer 24

B) can become explosive.

Question 25

High strength low alloy structural steels typically contain less than ____ % carbon. A) 12 B) 8 C) 6 D) 2

Answer 25

D) 2

Question 26

Which of the following describes production of semi killed steels? A) No deoxidizen arc added, steel bas a layer of pure iron on the outside. B) A small amount of deoxidizing material is added, steel has a varying degree of uniformity. C) Fully deoxidiud with no gu evolution occurring.

Answer 26

B) A small amount of dcoxidizing material is added, steel has a varying degree of uniformity.

Question 27

What is thermal conductivity? A) It is a flow rate for electrons through air. B) It is a flow rate for voltage through a material. C) It is the rate at which heat travels through a material. D) It is the rate a material resists cooling.

Answer 27

C) It is the rate at which heat travels through a material.

Question 28

Which of tbe following statements regarding rolling or forming metal is TRUE? A) Hot rolled steel's surface is shiny and smooth. B) Cold rolled steel results in grain structure that is generally uniform. C) Sheets and rods arc common, hot rolled products. D) Cold rolled steel results in better dimensional tolerances.

Answer 28

D) Cold rolled steel results in better dimensional tolerances.

Question 29

When welding pipe, which is the general rule for electrode inclination? A) The electrode is kept angled to the bottom of the pipe. 8) The electrode is kept angled to the top of the pipe. C) The electrode is kept angled to the centre of the pipe. D) There is no general rule, it is dependent on the technique of the welder.

Answer 29

C) The electrode is kept angled to the centre of the pipe.

Question 30

With gas tungsten arc welding, the electrode used is considered a consumable electrode. A) True B) False

Answer 30

B) False

Question 31

Which type of stainless steel should have preheating and postheating treatments when welded? A) Martensitic B) Ferritic C) Austenitic D) Dupex

Answer 31

A) Martensitic

Question 32

2. Stainless steels can be cut using conventional oxyfuel equipment. A) True B) False

Answer 32

B) False

Question 33

If you are using soapstone u a marker you should maintain a sharp edge by: A) placing the soapstone on a grinder. B) grinding the edge to produce a sharp edge. C) using your hammer to flatten the edge. D) using a file to sharpen it

Answer 33

D) using a file to sharpen it

Question 34

Compared to low carbon steel, stainless steel has a lower thermal conductivity. A)True B) False

Answer 34

A)True

Question 35

The safe handling of materials is the responsibility of: A)WHMIS. B)WCB. C) EL D) yourself.

Answer 35

D) yourself.

Question 36

lf a fuel gas connector bas a groove cut around it this is an indication that it is: A) a right hand thread. B) a left hand thread. C) an oxygen fitting. D) defective fitting.

Answer 36

B) a left hand thread.

Question 37

After a stop to change electrodes, where is it appropriate to restart the electrode? A) On the bead prior to the final crater. B) Within the final crater. C) In an area of the weld zone which has yet to be melted. D) Anywhere on the surface to be welded

Answer 37

C) In an area of the weld zone which has yet to be melted.

Question 38

As a result of an accident the Workers Compensation Act may assume the cost for replacement or repair of: A) eye glasses, clothing and jewellery. B) dentures, cavities and clothing. C) artificial limbs, hearing aids and jewellery . D) artificial eyes, hearing aids and clothing.

Answer 38

D) artificial eyes, hearing aids and clothing.

Question 39

Welding shops must install safety screens to protect the other workers from dangerous ____ when welding occurs A) toxic fumes B) loud sounds C) sources of heat D) light rays

Answer 39

D) light rays

Question 40

If using AC/DC inverter design power with square wave technology, by approximately how much is the weld width reduced when sharpening the electrode to a ( conical) point directs? A) 30% B) 25% C) 20% D) 15%

Answer 40

B) 25%

Question 41

Referring to the figure, which of the following weld symbols represent a single sided fillet weld? A) #6 B) #5 C) #4 D) #3 E) #2 F) #1

Answer 41

B) #5

Question 42

What is the recommended amperage range for a E-41010 3.2 mm electrode? A) 60 - 100 Amps B) 80- 100 Amps C) 65 - 140 Amps D) 90- 110 Amps

Answer 42

C) 65 - 140 Amps

Question 43

A quick method of identifying metals is by hardness and scratching the metal. A) True B) False

Answer 43

A) True

Question 44

With respect to non-destructive examination symbols, what does the letter "P" in "PT" refer to? A) Penetrant B) Penetrate C) Peroxide D) Pressure

Answer 44

A) Penetrant

Question 45

________ control is widely used in joining of precision parts and thin materials. A) A hot start B) Remote current C) Pulse D) Post purge

Answer 45

C) Pulse

Question 46

Gas nozzles in the GTAW process are designated by number 1.5 times the diameter compared to the inside diameter of the orifice opening. A) True B) False

Answer 46

B) False

Question 47

Solid expansion occurs: A) during the change from solid to liquid. B) in metal that is in a solid state but has not reached transition temperature. C) when metal changes from one crystalline structure to another while still a solid.

Answer 47

B) in metal that is in a solid state but has not reached transition temperature.

Question 48

What is a characteristic of a 200 series stainless steel? A) It has magnetic properties. B) It has ferritic micro structure . C) It has austenitic micro structure. D) It has little impact toughness.

Answer 48

C) It has austenitic micro structure.

Question 49

ln the GTAW process, which of the following would be the cause of an unstable arc? A) Poor work lead connections. B) Loose or broken wire to solenoid. C) Cables too long. D) Badly worn or dirty collet.

Answer 49

D) Badly worn or dirty collet.

Question 50

Which of the following divisions is not typically in a set of blueprints for a building project? A) Architectural B) Structural C) Heating D) Mechanical

Answer 50

C) Heating

Question 51

Steels that contain less than 10% chromium are classed as: A) rigid. B) soft. C) chrome. D) brushed.

Answer 51

C) chrome.

Question 52

Why is it important to create a quality tack weld at the outset of the project? A) It is not important, the tack weld is only temporary B) The tack weld may oxidize if not done well. C) The tack weld must fill any gaps or misalignments between materials. D) The tack weld will likely become part of the weld.

Answer 52

D) The tack weld will likely become part of the weld.

Question 53

# ``` ``` The welding symbol describes which type of weld? A) Fillet weld both sides, arrow side made flat by chipping. B) Fillet weld mow side, single bevel groove weld on other side. C) Single square groove weld arrow side. D) Double vee groove weld, finished flat by welding arrow wide.

Answer 53

D) Double vee groove weld, finished flat by welding arrow wide.

Question 54

Which of the following is an advantage of an AC Alternator? A) The initial cost. B) The nose level they operate at. C) The portability. D) All of the above

Answer 54

C) The portability.

Question 55

To fall within the acceptable criteria of many codes and standards a taper transition should be determined by determining the difference in thickness between the two materials and multiplying that difference by: A) 1 B) 2 C) 3 D) 4

Answer 55

C) 3

Question 56

In the 2G position, where is the rod held and why? A) At the front of the groove because it ensures adequate filler/puddle and penetration. B) Close to centre of the groove because it is easier to control fill level and counteracts gravity causing weld pool to leak out of groove. C) At the backside of the groove because it prevents surface tension causing suck-back. D) Position must change; puddle must be observed closely and position altered constantly to ensure smooth flow and correct puddle shape.

Answer 56

C) At the backside of the groove because it prevents surface tension causing suck-back.

Question 57

GTAW filler metals require very detailed precautions prior to welding. A) True B) False

Answer 57

B) False

Question 58

Using the AISI classification standard, which of the following numbers identifies a stainless steel with nickel and manganese added? A) 400 B) 300 C) 200

Answer 58

C) 200

Question 59

1000 Joules is equivalent to ____ BTUs. A) 948 B) 1.948 C) 1055 D) .948

Answer 59

D) .948