TEST 1 A. Brinell test C.

Precipitation hardening
1. The numbers of electrons B. Rockwell test D. Dispersion hardening
surrounding the nucleus of a neutral C. Vickers test The answer is: B
atom D. Mohs hardness 16. Heat steel at 760-845°C in a molten
is called: The answer is: D bath of solution of cyanide and other
A. Atomic weight 8. Many metals undergo a sharp salts.
B. Atomic number change in ductility and toughness A. Carbonitriding
C. Froude number across a narrow temperature range B. Cyaniding
D. Reynolds number called. C. Nitriding
The answer is: B A. Failure D. Boronizing
2. Beryllium, cadmium, cobalt, B. Ductie fracture The answer is: B
magnesium, alpha titanium, zinc and C. Cup-and-cone fracture 17. is a roundor rectangular box
zirconium have atomic arrangements D. Transition temperature furnace without a bottom.
of: The answer is: D A. Box furnace
A. Face-centered cubic (fcc) 9. Removing of surface oxides by B. Pit furnace
B. Body-centered cubic (bcc) chemical or electrochemical reaction. C. Bell furnace
C. Hexagonal close-packed (hcp) A. Stress Releive D. Elevator furnace
D. Octagonal close-packed (ocp) B. Hydrogen embrittlement The answer is: C
The answer is: C C. Residual stresses 18. Purpose of coke is to ________
3. Volume or bulk defecfs are called D. Pickling required for chemical reactions in iron
A. Slip band The answer is: D making to takes place.
B. Dislocations 10. Metal with highest melting point. A. generate the high level of heat
C. Vacancy A. Magnesium B. carbon monoxide
D. Voids B. Lead C. plastics and chemical compounds
The answer is: D C. Tungsten D. Remove impurities from the molten
4. Results from the alignment of D. Aluminum iron
impurities, inclusions and voids in the The answer is: C The answer is: A
metal during deformation. 11. Usually refers to the deterioration 19. The electric furnace was first
A. Anistropy of plastics. introduced into the:
B. Crystallographic anisotropy A. Optical properties A. China
B. Mechanical fibering B. Corrosion B. Japan
D. Annealing C. Degradation C. USA
The answer is: C D. Pitting D. A and B
5. When the load is first applied, the The answer is: C The answer is: C
specimen elongates in proportion to 12. Solidification begins with the 20. The removal of impurities is known
the load. This effect is called________. temperature of the moiten metal drops as:
If the load is removed, the specimen below the: A. Killed steel
return to its original length and shape, A. Liquidus B. Semi-killed
in an elastic process similar to B. Solidus C. Rimmed steel
stretching a rubber band and realising C. Eutectic point D. Refining
it. D. Solvus The answer is: D
A. Linear elastic behavior The answer is: A 21. Improves machinability
B. Engineering stress or nominal stress 13. Which of the following is not a type A. Niobium
C. Yield stress of gray cast iron? B. Phosphorus
D. Proportional limit A. Ferritic C. Selenium
The answer is: A B. pearlitic D. Silicon
6. Refers to the capability that some C. martensitic The answer is: C
materials have to undergo large D. All of these 22. Improves strength, toughness,
uniform elongation prior to necking The answer is: D abrasion, resistance, and hardness at
and fracture to tension. 14. is an irreversible dimensional elavated temperature, it inhibits grain
A. Superplastic forming change of the part. growth during heat treatment.
B. Superplasticity A. Quench cracking A. Titanium
C. Barreling B. Distortion B. Tungsten
D. Bauschinger effect C. Size distortion C. Vanadium
The answer is: B D. Shape distortion D. Zirconium
7. This test is based on the capability of The answer is: B The answer is: C
one material to scratch another based 15. The property improvement is 23. In order to improve the strength-
on a scale from 1 to 10, with 1 being known as: to-weight of steels, a number of______
the measure for taic and 10 that for A. Aging steels have been developed.
diamond. B. Age hardening A. Alloy steel
B. Structural-grade alloy steels The answer is: D C. Gating system
C. High-strength, low-alloy (HSLA) 31. Because of their low friction D. Sprue
D. Weathering steel coefficient, which result from low shear The answer is: A
The answer is: C strength and low adhesion, are used as
24. These steels contain chromium and journal-bearing. 39. A more recently developed, high
nickel, along with copper, aluminum, A. Babbit performance glass fiber, offering higher
titanium, or molybdenum. B. Tin alloys resistance to elevate temperature and
A. Austenitic stainless steels C. Tin acid corrosion.
B. Ferritic stainless steel D. Tin-lead A. E-CR
C. Martensitic stainless steels The answer is: A B. Pyrolysis
D. Precipitation-hardening stainless 32. A class of metal alloys whic, unlike C. Rayon and pitch
steels metals, do not have long-range D. Aramids
The answer is: D crystalline structure. The answer is: A
25. Are used for cold-working A. Rapid solidification 40. Long fibers generally have aspect
operations. They generally have high B. Metallic glasses ratios between.
resistance to wear and cracking.These C. Amorphous alloys A. 200 and 200
steels are available as oil-hardening or D. Glass B. 200 and 300
air-hardening types. The answer is: C C. 200 and 400
A. Cold-working steels (A,D and O 33. If the repeating units in a polymer D. 200 and 500
series) chain are all of the same type, the The answer is: D
B. Shocking-resisting steel (S-series) molecule is called: 41. The molten metal is poured
C. T-series A. Molecular weight distribution through a
D. Hot-work-steel (H-series) B. Degree of Polymerization A. Normal segregation
The answer is: A C. Covalent bonds B. Gravity segregation
26. Block of aluminum have recently D. Homopolymer C. Heterogeneous nucleation
been produced that are 37% lighter The answer is: D D. Pouring basin or cup
that solid aluminum and have uniform 34. Have the structure of a The answer is: D
permeability. thermoplastic but the nonmelting 42. Which are made of sand, plaster,
A. Porous aluminum characteristics of a thermoset. ceramics, and similar materials.
B. Magnesium A. Nylons A. Expendable moids
C. Copper B. Aramids B. Permanent moids
D. Brass C. Polyethylenes C. Composite moids
The answer is: A D. Polyimides D. Sand casting
27. Composed of 70% Copper and 30% The answer is: D The answer is: A
zinc. 35. Are compounds of metallic and 43. Consist of a cope on top and drag
A. Cartridge brass non-metallic elements. on the bottom.
B. Naval brass A. Ceramics A. Two-piece moid
C. Yellow brass B. Ceramics B. Cores
D. Red brass C. Clay C. Vents
The answer is: A D. Kaolin D. Pattern
28. Used in high temperature stability, The answer is: A The answer is: A
resistance to stress- corrosion cracking. 36. Consist of oxides, carbides and 44. Are made of two or more different
A. Monel K-500 nitrides: used in high temperature materials and used in shell molding and
B. Hastelloy C-4 application. other casting process.
C. Hastelloy A. Titanium nitride A. Shell-moid casting
D. Invar B. Silicone nitride B. Composite moids
The answer is: B C. Sialon C. Rammed graphite molding
29. The body-centered cubic structure D. Cermets D. Expendable pattern
of titanium, above 880°C is: The answer is: D The answer is: B
A. Ductile 37. The tiles on the space shuttieare 45. The product of the first hot-rolling
B. Maleable made of: is called:
C. Nodular A. Porcelain A. Bloom or slab
D. Brittle B. Silica fiver B. Bloom
The answer is: A C. Bioceramics C. Slab
30. Has silver gray in color, has high D. Aluminum oxide and silicone nitride D. Billets
strength-to-weight ratio. The answer is: B The answer is: A
A. Niobium 38. Is the process of inducing chemical 46. A group of stands is called a
B. Tungsten changesby heat. A. Two-high or three high
C. Tantaium A. Pyrolysis B. Tandem rolling
D. Beryllium B. Kelvar C. Train
D. Water-based 54. Very fine metal are blended with The answer is: C
The answer is: C either a polymer or a wax-based 62. A section of the bed in front of the
47. Is a process in which a blank is binder. headstock can be removed to
forged into a shape with a tool that A. Hot isostatic pressing accommodate larger diameter
forms the blank in several small steps. B. Injection molding workplace.
A. Incremental forging C. Roll compaction A. Engine lathes
B. Isothermal forging or hot-die forging D. Compacted by extrusion B. Gab bed lathes
C. Swaging The answer is: B C. Special-purpose lathes
D. Radial forging or swaging 55. Is the motion in which the clay bar D. Chuck
The answer is: A is formed by means of templates or The answer is: B
48. This hammer has two rams that rollers. 63. Are machine tools with
semultaneously approach each other A. Jiggering attachments that are capable of tuning
horizontally or vertically to forge the B. Hot pressing or pressure sintering parts with various contours.
part. C. Firing A. Tracer lathes
A. Screw presses D. Nanophase ceramics B. Automatic lathes
B. Gravity drop hammer The answer is: A C. Automatic bar Machine
C. Power drop hammer 56. Is done in a housing or case, which D. Turret lathes
D. Counterblow hammer is an integral part of the product. The answer is: A
The answer is: D A. Centrifugal casting 64. Are often used when several
49. The cross-section of a round rod or B. Potting related operations, such us holes of
wire is typically reduced or changed by C. Encapsulation different sizes, reaming, or
pulling it through a die. D. Solid-phase forming counterboring, must be done on a
A. Hydrostatic extrusion The answer is: B single part.
B. Drawing process 57. Is a basic geometric property of the A. Gang-drilling machine
C. Sizing pass tool. B. Turret-type drilling machines
D. All of these A. Built-up edge C. Radial drilling machine tools
The answer is: B B. Serrated chips D. Multiple-spindle drilling machine
50. Soft metals( as well as paper, C. Discontinues chips The answer is: A
leather and rubber can be blank with D. Normal rake angle 65. Can be adjusted over a few
_________. The answer is: D thousands of an inch to compensate
A. Lancing 58. Cemented carbide are used for for wear or to permit some variation in
B. Fine Blanking higher speed greater than: hole size to be obtained.
C. Slitting A. 1000 ft/min A. Expansion reamers
D. Steel rules B. 1100 ft/min B. Adjustable reamers
The answer is: D C. 1200 ft/min C. Taper reamers
51. Cones, hemisphere, and similar D. 1300 ft/min D. Roughing reamers
shapes are often formed by: The answer is: A The answer is: A
A. Tube drawing 59. There are two basic types of high- 66. Engage the work gradually, and
B. Wire drawing speed steels: usually more than one tooth cuts at a
C. Spinning A. Molybdenum and tungsten given time
D. Shear forming or flow turning B. Cast-cobalt alloys A. Right-hand cutter
The answer is: D C. Cast-cobalt alloys B. Left-hand cutter
52. In the basic method, a round-sheet D. Carbide or cemented of sintered C. Plain milting cutters
metal blank is placed over a circular die carbide D. Hefical milfs
operating and is held in place with a The answer is: A The answer is: D
_______. 60. Developed in 1970. Consists of 67. Milfing cutters are classified as
A. Seaming silicon nitride with various addition of either.
B. Roll forming aluminum oxide, yitrium oxide, and A. Angle mifling cutters
C. Bulging titanium carbide. B. Shell milfs
D. Blank holder or hold-down ring A. Cermets C. Fly cutting
The answer is: D B. Cubic Boron nitride D. Arbor cutters or shank cutters
53. Are used for many destructive C. Silicon-nitride based ceramics The answer is: D
purpose, in demolition work and in D. Diamond 68. Is important in that it provides a
warfare. The answer is: C sufficiently wide kerf for the blade to
A. Magnetic pulse forming 61. Is a special vise that attaches to the move freely in the workplace without
B. Explosive forming cross slide to hold work. binding and frictional resistance.
C. Peen forming A. Reamer A. Tooth set
D. Laser forming B. Taper attachment B. Smagging
The answer is: B C. Milling attachment C. Hacksaws
D. Knurling D. Circular saw
The answer is: A 76. The temperature developed in the 84. Are solid or semisolid lubricants
69. Are suitable for large as well as tail flame of oxyacetylene welding as result and generally consists of soaps, meniral
workplace that required machining on of these reactions can reach: oil and various additives.
a number of their surfaces. A. 3100°C A. Emulsifiers
A. Work envelope B. 3200°C B. Synthetic solutions
B. Vertical machining centers C. 3300°C C. Soups
C. Horizontal- spindle machining D. 3400°C D. Grease
centers The answer is: C The answer is: D
D. Universal machining centers 77. is used primarily for welding the 85. Is used for nonconductive materials
The answer is: C edges of section vertically in one pass, such as electrical insulators and
70. In addition to hardness, an with the piece placed edges to edges. semiconductor device.
important characteristics is: A. Globular transfer A. Sputtering
A. Abrasive B. GMAW process B. Reactive Sputtering
B. Aluminum oxide and silicon carbide C. Flux-cored arc welding C. Radio-frequency sputter
C. Cubic boron nitrides and diamond D. Electrogas welding D. Ion plating
D. Friability The answer is: D The answer is: C
The answer is: D 78. Pressure is applied to the 86. Is a much more entensive process
71. Temperature gradients within the workpiece through either dies or rolls. and requires specialized equipment.
workplace during grinding are primarily A. Cold welding A. Epitaxy
responsible for B. Ultrasonic welding B. Etching
A. Tempering and softening C. Friction welding C. Ion implantation
B. Burn D. Inertia friction welding D. Electromigration
C. Heat checking The answer is: A The answer is: C
D. Residual stresses 79. Produces poor weld beads. 87. Surface type of compressive stress
The answer is: D A. Porosity is sometimes called.
72. Is done on cylindrical grinders with B. Stag inclusion A. Design stress
specially dressed wheels matching the C. Incomplete fusion B. Factor of safety
shape of the threads. D. Incomplete penetration C. Bearing stress
A. Thread grinding The answer is: C D. Modulus of elasticity
B. Internal grinding 80. Brazing fluxes are generally made The answer is: C
C. Centerless grinding of: 88. Is the ability of a material to be
D. Through- feed grinding A. Borax deformed and to return to the original
The answer is: A B. Boric acid, borates, flourides shape.
73. Damage to a grinding wheel can C. Chlorides A. Ductile material
severely reduce it's: D. All of these B. Brittle materials
A. Chatter The answer is: D C. Elasticity
B. Bursting speed 81. Is used extensively in the electronic D. Embrittlement
C. Bursting speed industry. The answer is: C
D. Ultrasonic machining A. Ultrasonic soldering 89. Is that stress which causes a
The answer is: B B. Solder pastes specified permanent deformation of
74. Are thin ridge, usually triangular in C. Wave soldering material usually 0.01% or less.
shape, the develop along the edges of D. Soldering A. Plasticity
a work-piece from machining from The answer is: D B. Poisson's ratio
shearing sheet materials, and from 82. This operation is fast and it is C. Preceptation heat treatment
trimming forgings and castings. particularly sutation for joining thin D. Proof stress
A. Elecropolishing metallic and non-metallic materials. The answer is: D
B. Superfinishing A. Self- tapping 90. Is often used to mean tempering.
C. Burrs B. Riveting A. Aging
D. Buffing C. Metal stiching or stapling B. Annealing
The answer is: C D. Seaming C. Critical range
75. The source of energy is a laser, The answer is: C D. Drawing
which focusses optical energy on the 83. Is the science and technology of The answer is: D
surface of the work-piece. friction, wear and lubrication. 91. Load of 100 kg with 1/16 inch ball
A. Laser-beam machining A. Optical interference microscope for medium metals as for many copper
B. Laser-beam machining B. Atomic force microscope alloys and soft steels.
C. Plasma-arc cutting C. Tribology A. Rockwell B
D. Abrasive water-jet machining D. Adhesion theory B. Rockwell C
The answer is: B The answer is: C C. Rockwell A
D. Rockwell D
The answer is: A
92. Nickel chromium steels with 4.50% C. Copper alloys
1.50% chromium. D. Copper
A. 31XX The answer is: A
B. 32XX 100. Are about two-thirds as heavy as
C. 33XX aluminum, lightness is one of the most
D. 34XX significant characteristics of this metal.
The answer is: C A. Yellow Brass
B. Aluminum alloys
93. Nickel 3.50% - chromium 1.50% C. Magnesium alloys
A. 33XX D. Magnesium
B. 40XX The answer is: C
C. 41XX
D. 43XX
The answer is: A
94. Is steel that contains significant
quantities of recognized alloying
metals.
A. Carbon 60-95 points
B. Wrought alloy steel
C. Alloys
D. Low-alloy structural steels
The answer is: B
95. Increased hardinability markedly
and economically, tends to counteract
temper brittleness improving creep
strength and red hardness. Is the most
effective alloy for improving strength at
high temperature.
A. Lead
B. Manganese
C. Molybdenum
D. Phosphorus
The answer is: C
96. For heavy parts requiring deep
penetration of the heat treatment and
high fatigue strength per unit of
weight.
A. AISI 3140
B. AISI 3150
C. AISI 3240
D. AISI 3340 series
The answer is: D
97. The hardness should generally fault
between the limits.
A. 560< BHN< 700
B. 560< BHN< 710
C. 560< BHN< 720
D. 560< BHN< 730
The answer is: D
98. Is heat-treated white cast iron.
A. White cast iron
B. Malleable iron
C. Wrought iron
D. Chilled iron
The answer is: B
99. Which the usual way of hardening
the austhenitic type because of their
potent response to this treatment.
A. Cold working
B. Age hardening