Determining Material Properties with Destructive Testing

Question 1

the ability of a material to withstand an applied load

Answer 1

strength

Question 2

as the temperature of a metal increases its strength ______

a. increases
b. decreases
c. doesn’t change

Answer 2

decreases

Question 3

the strength necessary to resist failure under repeated cyclic loads.

Usually expressed as a specific number of cycles required to cause failure

10 million cycles at 50 ksi

a. tensile strength
b. fatigue strength
c. yield strength
d. toughness

Answer 3

b. fatigue strength

Question 4

the pulling strength required to break a material in tension.

a. tensile strength
b. fatigue strength
c. yield strength
d. toughness

Answer 4

a. tensile strength

Question 5

the abiligy of a material to resume its normal shape after being stretched

a. yield strength
b. tensile strength
c. elasticity
d. elongation
e. ductility

Answer 5

c. elasticity

Question 6

the tensile load required to change a material from elastic to plastic

a. yield strength
b. tensile strength
c. elasticity
d. elongation
e. ductility

Answer 6

a. yield strength

Question 7

the point at which a material changes from elastic to plastic

a. yield point
b. ultimate tensile strength
c. elongation
d. breaking point

Answer 7

a. yield point

Question 8

the stretching of a material

a. elasticity
b. elongation
c. ductility
d. tensile strength
e. yield strength
f. fatigue strength

Answer 8

b. elongation

expressed as percent elongation 23%

Question 9

the ability of a material to deform or stretch under a load, without failing

a. elasticity
b. elongation
c. ductility
d. tensile strength
e. yield strength
f. fatigue strength

Answer 9

c. ductility

expressed as percent elongation or percent reduction of area

Question 10

As a material’s temperature increases what happens to its ductility?

a. increases
b. decreases

Answer 10

a. increases

Question 11

if a material has very little ductility or doesn’t show much elongation, personnel can still detemine hte material’s yield strength using an ______ ______ that accounts for the lack of ductility.

Answer 11

offset technique

Question 12

the ability of a material to absorb energy slowly, without fracturing

a. elasticity
b. elongation
c. ductility
d. tensile strength
e. yield strength
f. fatigue strength
g. toughness

Answer 12

g. toughness

Question 13

the ablility of a material to absorb rapidly-applied energy when a surface flaw is precent at a certain temperature

a. elasticity
b. elongation
c. ductility
d. notch toughness
e. yield strength
f. fatigue strength
g. tensile strength

Answer 13

d. notch toughness

expressed as a breaking energy such as 20 foot punds at 70 degrees

Question 14

a material with ____ toughness will absorb a lot of energy and may or may not fracture upon impact during the Charpy V notch test.

a. low
b. medium
c. high

Answer 14

c. high

Question 15

A material with ____ toughness will not absorb much energy and will fracture easily.

a. low
b. medium
c. high

Answer 15

a. low

Question 16

What effect does temperature have on the toughness of a material when performing the Charpy V notch test?

a. low temperatures cause the material’s toughness to increase
b. low temperatures cause the material’s toughness to decrease and become more brittle
c. high temperatures cause the material’s toughness to decrease

Answer 16

b. low temperatures cause the material’s toughness to decrease and become more brittle

Question 17

What test do engineers use to see at what tmperature the material fracture changes from ductile to brittle?

a. the rockwell method
b. the microhardness method
c. the charpy v notch test
d. the tensile hardness test

Answer 17

c. the charpy v notch test

Question 18

the ability of a material to resist penetation or indentation

a. toughness
b. hardness
c. tensile strength
d. ductility
e. elongation

Answer 18

b. hardness

Question 19

the _____ of a weldment refers to its freedom from imperfections

a. strength
b. ductility
c. hardness
d. soundness
e. toughness

Answer 19

d. soundness

Question 20

know the difference between root bend and face bend test

Answer 20

root bend of the weld is what was bent and examined

face bend test exposes the face of the weld for examination

Question 21

filled weld break test tests for

a. hardness
b. tensile strenth
c. soundness
d. toughness

Answer 21

c. soundness

Question 22

When a specimen is examined at 10X magnifaction or small it is a ____ test

a. macro
b. micro

Answer 22

a. macro

Question 23

When a specimen is examined at greater than 10X, it is a ____

a. macro
b. micro

Answer 23

b. micro

Question 24

Notch toughness is also referred to as

a. fatigue strength
b. impact strength
c. tensile strength
d. yield strength

Answer 24

b. impact strength

Question 25

the higher the temperature the higher the

a. toughness
b. strength

Answer 25

a. toughness