(6) METAL PROPERTIES and DESTRUCTIVE TESTING

Question 1

Q6-1
The property of metals that describes their resistance to indentation is called:

a. strength
b. toughness
c. hardness
d. ductility
e. none of the above

Answer 1

Q6-1
The property of metals that describes their resistance to indentation is called:

c. hardness

Question 2

Q6-2
The property of metals that describes their ability to carry a load is:

a. strength
b. toughness
c. hardness
d. ductility
e. none of the above

Answer 2

Q6-2
The property of metals that describes their ability to carry a load is:

a. strength

Question 3

Q6-3
Generally, as strength increases for carbon steels, the ductility:

a. increases
b. stays the same
c. decreases
d. is not related to strength
e. none of the above

Answer 3

Q6-3
Generally, as strength increases for carbon steels, the ductility:

c. decreases

Question 4

Q6-4
The property that describes the ability of a metal to deform when stressed is:

a. strength
b. toughness
c. hardness
d. ductility
e. none of the above

Answer 4

Q6-4
The property that describes the ability of a metal to deform when stressed is:

d. ductility

Question 5

Q6-5
The type of strength related to a metal’s behavior when the load is applied in a cyclic manner is:

a. tensile
b. compressive
c. torsional
d. impact
e. fatigue

Answer 5

Q6-5
The type of strength related to a metal’s behavior when the load is applied in a cyclic manner is:

e. fatigue

Question 6

Q6-6
The yield strength of a material is determined by:

a. impact testing
b. tensile testing
c. hardness testing
d. the offset method
e. b and d above

Answer 6

Q6-6
The yield strength of a material is determined by:

E. b and d above

b. tensile testing
d. the offset method

Question 7

Q6-7
Which metal properties are directly related?

a. conductivity and strength
b. strength and ductility
c. strength and hardness
d. ductility and toughness
e. c and d above

Answer 7

Q6-7
Which metal properties are directly related?

E. c and d above

c. strength and hardness
d. ductility and toughness

Question 8

Q6-8
The ability of a metal to absorb energy is called:

a. strength
b. ductility
c. hardness
d. toughness
e. none of the above

Answer 8

Q6-8
The ability of a metal to absorb energy is called:

d. toughness

Question 9

Q6-9
The metal property affected by the surface condition of the sample is:

a. tensile strength
b. UTS
c. hardness
d. fatigue strength
e. all of the above

Answer 9

Q6-9
The metal property affected by the surface condition of the sample is:

E. all of the above

a. tensile strength
b. UTS
c. hardness
d. fatigue strength

Question 10

Q6-10
Which alloying element is generally considered to have the most pronounced effect on the properties and performance of carbon steel?

a. aluminum
b. carbon
c. manganese
d. chromium
e. none of the above

Answer 10

Q6-10
Which alloying element is generally considered to have the most pronounced effect on the properties and performance of carbon steel?

b. carbon

Question 11

Q6-11
Which alloying element is commonly added to steel to improve its corrosion resistance?

a. carbon
b. aluminum
c. silicon
d. chromium
e. none of the above

Answer 11

Q6-11
Which alloying element is commonly added to steel to improve its corrosion resistance?

d. chromium

Question 12

Q6-12
Hydrogen in the molten weld metal can cause:

a. undercut
b. overlap
c. cracking
d. porosity
e. c and d above

Answer 12

Q6-12
Hydrogen in the molten weld metal can cause:

E. c and d above

c. cracking
d. porosity

Question 13

Q6-13
Which property cannot be determined from a tensile test?

a. ultimate tensile strength
b. percent elongation
c. percent reduction of area
d. impact strength
e. yield strength

Answer 13

Q6-13
Which property cannot be determined from a tensile test?

d. impact strength

Question 14

Q6-14
A metal’s ductility can be expressed as:

a. percent elongation
b. percent reduction of area
c. proportional limit
d. a and b above
e. b and c above

Answer 14

Q6-14
A metal’s ductility can be expressed as:

D. a and b above

a. percent elongation
b. percent reduction of area

Question 15

Q6-15
A tensile specimen having a cross sectional area of 0.25 sq in breaks at a load of 15 250 lbs. What is its tensile strength? (Tensile Strength = Load/Area)

a. 3813 psi
b. 61 000 psi
c. 6100 psi
d. 58 500 psi
e. none of the above

Answer 15

Q6-15
A tensile specimen having a cross sectional area of 0.25 sq in breaks at a load of 15 250 lbs. What is its tensile strength? (Tensile Strength = Load/Area)

b. 61 000 psi

Question 16

Q6-16
The point at which a metal’s behavior changes from elastic to plastic (onset of permanent deformation) is referred to as:

a. yield strength
b. ultimate tensile strength
c. modulus of elasticity
d. Young’s modulus
e. none of the above

Answer 16

Q6-16
The point at which a metal’s behavior changes from elastic to plastic (onset of permanent deformation) is referred to as:

a. yield strength

Question 17

Q6-17
What is the percent elongation of a specimen whose original gage length was 2 in and final gage length was 2.5 in?

a. 30%
b. 25%
c. 50%
d. 40%
e. none of the above

Answer 17

Q6-17
What is the percent elongation of a specimen whose original gage length was 2 in and final gage length was 2.5 in?

b. 25%

Question 18

Q6-18
The family of hardness tests that uses both a minor and major load is called:

a. Brinell
b. Vickers
c. Rockwell
d. Knoop
e. none of the above

Answer 18

Q6-18
The family of hardness tests that uses both a minor and major load is called:

c. Rockwell

Question 19

Q6-19
Which of the following tests are referred to as microhardness tests?

a. Rockwell
b. Vickers
c. Knoop
d. a and b above
e. b and c above

Answer 19

Q6-19
Which of the following tests are referred to as microhardness tests?

E. b and c above

b. Vickers
c. Knoop

Question 20

Q6-20
What type of test uses a weighted pendulum which strikes a notched test specimen?

a. Brinell test
b. fatigue test
c. tensile test
d. microhardness test
e. Charpy impact test

Answer 20

Q6-20
What type of test uses a weighted pendulum which strikes a notched test specimen?

e. Charpy impact test

Question 21

Q6-21
Endurance limit is an expression used for what type of testing?

a. fatigue
b. hardness
c. soundness
d. tension
e. none of the above

Answer 21

Q6-21
Endurance limit is an expression used for what type of testing?

a. fatigue

Question 22

Q6-22
The metal property that relates to a metal’s deforming without failing is called:

a. tensile strength
b. ductility
c. hardness
d. toughness
e. none of the above

Answer 22

Q6-22
The metal property that relates to a metal’s deforming without failing is called:

b. ductility

Question 23

Q6-23
Which test is not considered a soundness test?

a. hardness
b. face bend
c. fillet break
d. root bend
e. nick break

Answer 23

Q6-23
Which test is not considered a soundness test?

a. hardness

Question 24

Q6-24
The type of testing used to evaluate the type of microstructure present in a metal is called:

a. tensile
b. hardness
c. toughness
d. metallographic
e. none of the above

Answer 24

Q6-24
The type of testing used to evaluate the type of microstructure present in a metal is called:

d. metallographic

Question 25

Q6-25 Which of the following tests can be used to judge the soundness of a weld? a. nick break b. side bend c. face bend d. fillet break e. all of the above

Answer 25

Q6-25 Which of the following tests can be used to judge the soundness of a weld? E. all of the above a. nick break b. side bend c. face bend d. fillet break

Question 26

Q6-26 Which of the following tests will generally be used to determine the behavior of a metal at a specific temperature? a. guided-bend test b. root-bend test c. Charpy impact test d. transverse fillet weld shear test e. all of the above

Answer 26

Q6-26 Which of the following tests will generally be used to determine the behavior of a metal at a specific temperature? c. Charpy impact test

Question 27

Q6-27 With respect to the rolling direction of steel plate manufacture, which statement is true? a. The strength is highest in the ‘Z’ direction. b. The strength is lowest in the ‘X’ direction. c. The strength is highest in the ‘X’ direction. d. The strength is highest in the ‘Y’ direction. e. The strength is lowest in the ‘Y’ direction

Answer 27

Q6-27 With respect to the rolling direction of steel plate manufacture, which statement is true? c. The strength is highest in the ‘X’ direction.

Question 28

Q6-28 The fillet weld break test is used to evaluate the: a. quality of the fractured weld b. ductility of the weld metal c. impact strength of the weld d. tensile strength of the base metal e. none of the above

Answer 28

Q6-28 The fillet weld break test is used to evaluate the: a. quality of the fractured weld

Question 29

Q6-29 The welding inspector is not concerned with the mechanical and chemical properties of metals. a. true b. false

Answer 29

Q6-29 The welding inspector is not concerned with the mechanical and chemical properties of metals. b. false

Question 30

Q6-30 For plain carbon steels, their approximate tensile strength can be estimated by multiplying their BHN by: a. 400 b. 300 c. 100 d. 200 e. 500

Answer 30

Q6-30 For plain carbon steels, their approximate tensile strength can be estimated by multiplying their BHN by: e. 500

Question 31

Q6-31 Notch toughness and impact strength are not synonymous. a. true b. false

Answer 31

Q6-31 Notch toughness and impact strength are not synonymous. b. false

Question 32

Q6-32 Phosphorus and sulfur are added to carbon steel to improve: a. ductility b. toughness c. weldability d. impact strength e. none of the above

Answer 32

Q6-32 Phosphorus and sulfur are added to carbon steel to improve: E. none of the above

Question 33

Q6-33 To improve the low temperature properties of carbon steels, the most likely alloy addition would be: a. manganese b. carbon c. nickel d. chromium e. none of the above

Answer 33

Q6-33 To improve the low temperature properties of carbon steels, the most likely alloy addition would be: c. nickel

Question 34

Q6-34 Hydrogen, oxygen, and nitrogen can all cause embrittlement in carbon steels. a. true b. false

Answer 34

Q6-34 Hydrogen, oxygen, and nitrogen can all cause embrittlement in carbon steels. a. true

Question 35

Q6-35 Gage marks on a tensile specimen are: a. scratches caused by improper handling b. marks caused by using a gage to measure sample area c. spaced a set distance apart d. used for calculating percent elongation e. c and d above

Answer 35

Q6-35 Gage marks on a tensile specimen are: E. c and d above c. spaced a set distance apart d. used for calculating percent elongation

Question 36

Q6-36 The ‘offset method’ is used for determining which property? a. yield strength b. tensile strength c. hardness d. fatigue strength e. impact strength

Answer 36

Q6-36 The ‘offset method’ is used for determining which property? a. yield strength

Question 37

Q6-37 Surface preparation is not an important step in destructive testing. a. true b. false

Answer 37

Q6-37 Surface preparation is not an important step in destructive testing. b. false

Question 38

Q6-38 The Brinell hardness test is always a destructive test. a. true b. false

Answer 38

Q6-38 The Brinell hardness test is always a destructive test. b. false

Question 39

Q6-39 In Charpy testing, the test temperature is: a. not important b. very important c. not considered d. never reported e. none of the above

Answer 39

Q6-39 In Charpy testing, the test temperature is: b. very important

Question 40

Q6-40 In Charpy testing, the test data can be reported as: a. foot pounds energy absorbed b. lateral expansion c. percent shear d. all of the above e. offset data

Answer 40

Q6-40 In Charpy testing, the test data can be reported as: D. all of the above a. foot pounds energy absorbed b. lateral expansion c. percent shear

Question 41

Q6-41 The objective of the guided bend test is to break the sample. a. true b. false

Answer 41

Q6-41 The objective of the guided bend test is to break the sample. b. false

Question 42

2008 ANSWER KEY—CHAPTER 6

Answer 42

``` ANSWER KEY—CHAPTER 6 Q6-1 c (pg. 6-10) Q6-2 a (pg. 6-3) Q6-3 c (pg. 6-4) Q6-4 d (pg. 6-9) Q6-5 e (pg. 6-18, 6-19) Q6-6 e (pg. 6-7, 6-8) Q6-7 e (pg. 6-11, 6-16, pg. 6-17) Q6-8 d (pg. 6-16) Q6-9 e (pg. 6-5, 6-10, 6-18) Q6-10 b (pg. 6-25) Q6-11 d (pg. 6-26) Q6-12 e (pg. 6-26) Q6-13 d (pg. 6-5) Q6-14 d (pg. 6-9) Q6-15 b (pg. 6-6) Q6-16 a (pg. 6-7) Q6-17 b (pg. 6-9) Q6-18 c (pg. 6-12) Q6-19 e (pg. 6-16) Q6-20 e (pg. 6-18) Q6-21 a (pg. 6-18, 6-19) Q6-22 b (pg. 6-9) Q6-23 a (pg. 6-10) Q6-24 d (pg. 6-28) Q6-25 e (pg. 6-20–6-23) Q6-26 c (pg. 6-18, 6-19, Figure 6.19) Q6-27 c (pg. 6-10) Q6-28 a (pg. 6-22, 6-23) Q6-29 b (pg. 6-2) Q6-30 e (pg. 6-11) Q6-31 b (pg. 6-16, 6-17) Q6-32 e (pg. 6-25, 6-26) Q6-33 c (pg. 6-26) Q6-34 a (pg. 6-26) Q6-35 e (pg. 6-8, 6-9) Q6-36 a (pg. 6-8) Q6-37 b (pg. 6-10, 6-11) Q6-38 b Q6-39 b (pg. 6-17) Q6-40 d (pg. 6-18) Q6-41 b (pg. 6-20–6-22) ```