Elements 12

Which of the following is manufactured from aluminum oxide have the same expected life as carbide tools but can operate at speeds from two to three times higher? They operate below 1100 C.
A. Sintered carbides
B. Ceramic tools
C. Diamonds
D. Cast nonferrous

Carbon tool steel can be given a good edge, but is restricted to use below—-
A. 400 to 600 F
B. 300 to 400 F
C. 700 to 800 F
D. 800 to 1000 F

Which of the following contains tungsten or chromium and retains its hardness up to approximately 1100°F, a property known as red hardness?
A. Ceramic tools
B. Diamonds
C. High speed steel
D. Carbon tool steel

Cast nonferrous tools are britte but can be used up t approximately
A. 1700°F
B. 2200° F
C. 2000° F
D. 600 °F

They are produced through powder metallurgy from nonferrous metals.
A. Diamonds
B. Cast nonferrous
C. Ceramic tools
D. Sintered carbides

Which of the following is manufactured from aluminum. oxide have the same expected life as carbide tools bui can operate at speeds from two to three times higher?
A. Ceramic tools
B. High speed steel
C. Diamonds
D. Carbon tool steel

Soluble in the presence of high temperature iron used in specific cases, usually in finishing operations.
A. Ceramic tools
B. Diamonds
C. High speed steel
D. Aluminum

Continuous stretching under load even if the stress is less than the yield point.
A. plasticity
B. creep
C. elasticity
D. ductility

A material plane was subjected to a load. When the load was removed the strain disappeared. From the structural change, which of the following can be considered about this material?
A. it has high modules of elasticity
B. it is plastic
C. it does not follow Hooke's Law
D. it is elastic

When an air entrainment agent is put into a concrete.
A. the water/cement ratio must be reduced
B. the strength will decrease
C. minimal effect
D. the strength will suffer up to 50%

The ratio of moment of inertia on a cross-section of a beam to this section modulus is —-
A. a measure of distance
B. equal to the radius of gyration and compression
C. multiplied by the bending moment of inertia to determine the yield stress
D. equal to the area of the cross-section and tension

Alloy that improves strength of steel at high temperature application.
A. aluminum
B. silicon
C. manganese
D. chromium

The property of material wherein the content is continuously distributed through its entire mass.
A. plasticity
B. homogeneity
C. malleability
D. all of these

Material having a high electrical resistance and should not be used as conductor of electrical current.
A. nickel
B. silicon base alloys
C. aluminum oxide
D. iron oxide

The alloy materials used in the production of metal working tools.
A. titanium, phosphorous
B. vanadium, chromium, molybdenum
C. tungsten, silicon, chromium
D. high carbon steel

Which of the phases of steel elements has a face. centered cubic structure?
A. pyrite
B. cementite
C. austenite
D. all of these

The rigidity of polymer can be increased by ——
A. furnace melting
B. crystallization
C. normalizing
D. shot opening

What is the difference between cast steel and cast iron?
A. Cast steel has usually less than 1 %
B. Cast iron has 2% or 3.6% carbon range
C. Cast iron has lower strength more brittle and has lower ductility than cast steel
D. All of these

Which of the following standard SAE designation of manganese steel?
A. 13xx
B. 11xx
C. 10xx
D. 8xx

The SAE 2340 shafting contains how many percent nickel?
A. 3.85 Ni
B. 3.25 to 3.75 % Ni
C. 4% Ni
D. 3.84% Ni

Which of the following standard SAE designation for chromium steel?
A. 92xx
B. 3xxx
C. 5xxx
D. 11xx

In general, alloys with high nickel content retain toughness to quiet low temperatures up to how many degrees Fahrenheit?
A. -380
B. -260
C. -400
D. -320

Plain carbon steel standard designation SAE
A. 6xxx
B. 10xx
C. 13хх
D. 2xxx

Molybdenum-chromium-nickel steel designation.
A. SAE48×x
B. SAE56xx
C. SAE43xx
D. SAE46xx

Commonly used by steel as deoxidizer because of its easy availability and cheap price.
A. silicon
B. zinc
C. aluminum
D. manganese

It improves red hardness of steel.
A. silicon
B. cobalt
C. lead
D. manganese

A material having a high electrical resistance and should not be used for conductor of electric current.
A. alloyed magnesium
B. nickel
C. silicon base alloy
D. zinc

Not adaptable to welding due to low tensile strength and poor ductility etc.
A. copper parts
B. aluminum parts
C. cast iron materials
D. bronze parts

Molybdenum steel standard designation SAE.
A. 88xx
B. 40xx
C. 48xx
D. 46xx

General purpose grade of steel used for boiler plate, structural etc. usually with carbon content of:
A. 0.20 % to 0.30%C
B. 0.35% to 0.50%C
C. 0.15% to 0.25%C
D. all of these

The principal materials used in the production of metal working tools.
A. high carbon steel
B. titanium, phosphorous
C. tungsten, silicon, Manganese
D. vanadium, chromium, molybdenum

Stress relieving is also ——for the purpose of reducing the internal stresses of steel material/metal..
A. normalizing
B. annealing
C. tempering
D. all of these

Martensite (stainless steel) contains 4 to 26% Cr. And a maximum of ——
% nickel
A. 2.5
B. 3.5
C. 3.25
D. 2.0

Class of material exhibiting decreased electrical conductivity with increasing temperature.
A. aluminum
B. metals
C. p-type semiconductors
D. n-type semiconductors

Not part and in fact should not be used in the steel melting process.
A. coke
B. zinc
C. silicon
D. aluminum

The strength of non-ferrous alloys is at maximum at room temperature while that of ferrous metal has a maximum strength at —- °F.
A. 400
В. 450
C. 1200
D. 350

The ratio of stress acting on an elastic substance to the decrease in volume per unit volume.
A. bulk modulus
B. elastic limit
C. modulus of resilience
D. modulus of elasticity

Which of the following is an iron based alloy containing 9-16% chromium?
A. Mn Hadfield steel
B. stainless steel
C. chrome-moly steel
D. high chrome steel

All associated with standard material specification except —-
A. American Iron and Steel Institute
B. Society of Automotive Engineers
C. Southeast Asia Iron and Steel Institute
D. American Society for Testing Materials

The process of peening the joint portion immediately after the welding greatly improves the fusion structures avoids possible cracking, avoids possible distortion etc. Peening can also —-process at the same time.
A. tempering
B. normalizing
C. martempering
D. annealing

Which of the following is a major alloy in tool steel?
A. Cr
B. Cobalt
C. Fen
D. Mn

It is the process of pre-stressing or over-stressing of a hollow cylindrical member beyond the elastic range.
A. presstagge
B. autofrettage
C. stress relieving
D. countersinking

It is the phenomenon occurring when two touching surfaces have a high contact pressure and when these surfaces have minute relative motion.
A. prestressing
B. fretting
C. friction
D. carving

For ordinary steel, the modulus of elasticity usually falls between —-
million pounds.
А. 20 to 31
В. 35 to 45
C. 20 to 35
D. 25 to 30

When heat-treated, wire is coiled cold, it should be stress relieved for bending stress and after cooling it is heated at some —-
A. 400°F
B. 600°F
C. 700°C
D. 500°F

SAE 51XXX belongs to the —-steel family.
A. carbon
B. chromium
C. manganese
D. nickel

In itself, is a lubricant and usually one of the important example: elements in casting non-ferrous metals like bronze, for
A. antimony
B. babbitt
C. lead
D. zinc

The same material properties all over / direction and at any particular point in a structural member is —-
A. heterogenous
B. homogenous
C. isentropic
D. isotropic

To enhance mechanical properties, fabrication characteristic or any other attributes of steel, some elements are added in melting in specific ranges or minimum aside from carbon and generally termed —-
A. Alloy steel
B. AlSI steel
C. Bessemer steel
D. SAE steel

Materials having thermal expansion of about 10 times higher than those of metals and has more heat generated during machining is:
A. Aluminum
B. Asbestos
C. Plastic
D. PVC

What do impact tests measure?
A. Compactness
B. Ductility
C. Plasticity
D. Toughness

Corresponding piping color for alkaline.
A. Blue
B. Green
C. Red
D. Violet

Specification of molybdenum alloy.
A. SAE 3XXX
B. SAE 4XXX
C. SAE 5XXX
D. SAE 6XXX

It is a chromium steel tape in AISI-SAE designation.
A. 10XX
B. 25xx
C. 50XX
D. 40XX

All stainless steel type is SAE designation except
A. 92 XX
B. 300XX
C. 304 XX
D. 515 XX

It is white metal with good oxidation and corrosion resistance. This has also good electrical magnetic properties.
A. Aluminum
B. Copper
C. Nickel
D. Titanium

It is a molybdenum steel-tape in AISI-SAE designation.
A. 44 XX
B. 45 XX
C. 50 XX
D. 51 XX

The lateral strain in axial tension members can be calculated by
A. Deformation
B. Hooke's law
C. Poisson's ratio
D. Willan's line

A steel with SAE specification 13XX is
A. Chromium
B. Manganese
C. Molybdenum
D. Nickel

Heating the metal to a temperature above the critical temperature and from cooling slowly usually done in the furnace to reduce the hardness and improve the machinability is a process called
A. annealing
B. normalizing
C. quenching
D. tempering

Sound travels fastest in
A. air at 0ºF and 1 atmosphere
B. air at 70°F and 1 atmosphere
C. air at 70°F and 0 Ibf/ in squared
D. steel at 70° F

The yield strength of common yellow brass (70%Cu,30% Zn) can be increased by
A. annealing
В. chill casting
C. cold working
D. heat treatment

To enhance mechanical properties, fabrication characteristic or any other attributes of steel, some elements are added in melting in specific ranges or minimum aside from carbon and generally termed
A. Alloy steel
B. AISI steel
C. Bessemer steel
D. SAE steel

Materials having thermal expansion of about 10 times higher than those of metals and has more heat generated during machining is
A. Aluminum
B. Asbestos
C. Plastic
D. PVC

What is the range of the endurance ratio or Czaud quotes values for steel ?
А. 0.23 to 0.65
В. 0.34 to 0.87
C. 0.63 to 0.93
D. 0.34 to 0.45

In molecules of the same composition, what are variations of atomic arrangements known as?
A. polymers
B. monomers
C. Isomers
D. crystal system

Which of the following statements is not true regarding
X-ray diffraction?
A. the geometrical structure factor F(h,k,l) is the ratio of the amplitude of the X-ray
B. reflected from a plane in a crystal to the amplitude of the X-ray scattered from a single electron.
C. x-ray diffraction is only useful for studying simpler crystal such as the body-centered cubic structure, rather than more complex crystals like the hexagonal close-packed structure.
D. X-ray diffraction can be used to determine the grain size of a specimen.

Which of the following describes diffusion in a crystal structure?
A. It is not possible.
B. It occurs only in alloys, never in pure crystal.
C. It often uses an exchange or vacancy mechanism.
D. It occurs primarily as a result of mechanical work.

Which of the following does not produce vacancies, interstitial defects, or impurity defects in a material?
A. plastic deformation
B. quenching
C. slow equilibrium cooling
D. irradiation with high energy particles

In general, what are the effects of cold-working a metal?
A. increase strength and ductility
B. increased strength and decrease ductility
C. increased strength, decreased
D. decreased strength, increased ductility

71. Which of the following does cold-working cause?
A. elongation of grains in the flow direction, an increase in dislocation density, and overall increase in energy of the metal
B. elongation of grains in the flow direction, a decrease in dislocation density, and an overall decrease in energy of the metal
c. elongation of grains in the flow direction, a decrease in dislocation density, and an overall increase in energy of the metal
D. shortening of grains in the flow direction, a decrease in dislocation density, and an overall decrease in the energy of the metal

Which of the following correctly describes atoms located at grain boundaries?
A. they are subjected to the same type of inter atomic forces that are presented in the interior atoms of the crystal.
B. they are located primarily in highly strained and distorted positions.
C. they have a higher free energy than atoms in the undisturbed part of the crystal lattice.
D. All of these

For a completely corrosion-resistant stainless steel, what minimum percentage of chromium in the alloy is required?
A. 1.1%
B. 8.3%
С. 3.2%
D. 11%

When a metal is cold worked all of the following generally occur EXCEPT
A. Recrystallization temperature decreases
B. Ductility decreases
C. Grains become equi-axed
D. Tensile strength increases

Which of the following affects most of the electrical and thermal properties of materials?
A. the atomic weight expressed in grams per gram-atom
B. the electrons, particularly the outermost ones
C. the magnitude of electrical charge of the protons
D. the weight of the atoms

Which of the following is NOT a method of nondestructive testing of steel casting and forgings?
A. radiography
B. últrasonic
C. magnetic particle
D. chemical analysis

Compressive strength of fully cured concrete is most directly related to
A. sand-gravel
B. aggregate gradation
C. water-cement ratio
D. absolute volume of cement

According to the ACI code, the modular ratio, n, of structural concrete with a 28 - day ultimate compressive strength, fc, of 3000 is nearest to
А. 7
B. 9
C. 8
D. 10

What are valence electrons?
A. the outershell electrons
B. electrons with positive charge
C. the electrons of the complete quantum shells
D. the K-quantum shell electrons

Which of the following is not a viscoelastic material?
A. plastic
B. rubber
C. metal
D. glass

Which of the following statements is false?
A. Both copper and aluminum have a face-centered crystal structure.
B. Both magnesium and zinc have a hexagonal close-packed crystal structure.
C. Iron can have either a face-centered or a body-centered cubic crystal structure.
D. Both lead and cadmium have a hexagonal close-packed crystal structure.

The material for engine radiation is usually made of
A. admiralty brass
B. havy brass
C. silicon brass
D. yellow brass

Non - metallic material of high melting temperature being used as furnace lining is called
A. Dolomite clay bricks
B. Quartz bricks
C. Refractories
D. Silica sand

In greater quantity, this element is harmful to the molten ferrous metal.
A. Aluminum
B. Oxides
C. Silicon
D. Sulfur

What is the SAE specification number of molybdenum? -
A. SAE 2XXX
B. SAE 3XXX
C. SAE 4XXX
D. SAE 5XXX

Which of the following is not a structural class of steel?
A. High carbon
B. High speed steel
C. Low carbon
D. Tool and die

A furnace used in melting non - ferrous metals called:
A. crucible furnace
B. cupola furnace
C. induction furnace
D. tempering furnace

Which of the following elements when large quantity is harmful to the ferrous metal?
A. Aluminum
В. Silicon
C. Sulfur
D. Zinc

Which of the following is the SAE steel that responds to heat treatment?
А. SAE 1117
B. SAE 1060
C. SAE 1030
D. SAE 1020

An iron in which most of the carbon is chemically combined with the iron called
A. cast iron
B. gray iron
C. malleable iron
D. white iron

Material, usually ceramics employed where resistance to very high temperature is required, as for furnace linings and metal melting pots called
А. bricks
B. clay
C. insulator
D. refractories

Polyesters belong to the group of
A. phenolics
B. teflon
C. thermoplastic plastics
D. thermosetting plastics

The process commonly used over thermo-plastic materials is
A. cold forming
B. die casting
C. injection molding
D. shell molding

The hardness of steel increase if it contains
A. Austenite
B. Copper
C. Pearlite
D. Martensite

Which one is different from the remaining?
А. Cyaniding
В. Electroplating
C. Flame hardening
D. Nitriding

Ductile fracture is characterized by
A. appreciable plastic deformation prior to propagation of crack
B. fragmentation into more than two pieces
C. negligible deformation
D. rapid rate for crack propagation

Nonmetallic materials of high melting temperature used in the construction of furnaces, crucibles and so forth are called
A. ceramics
B. grate
C. insulators
D. refractories

Which of the following material has 66 % nickel, 29% copper and 3% aluminum ?
A. K monel
B. Monel
C. Inconel
D. Inconel

Ferrous metals contain relatively large amount of
A. Carbon
B. manganese
C. phosphorous
D. sulfur

Which of the following metals has the highest specific heat capacity at 100°C?
A. aluminum
B. copper
C. bismuth
D. iron