TEST 1

1. The numbers of electrons surrounding the nucleus of a neutral atom

is called:

A. Atomic weight

B. Atomic number

C. Froude number

D. Reynolds number

The answer is: B

2. Beryllium, cadmium, cobalt, magnesium, alpha titanium, zinc and

zirconium have atomic arrangements of:

A. Face-centered cubic (fcc)

B. Body-centered cubic (bcc)

C. Hexagonal close-packed (hcp)

D. Octagonal close-packed (ocp)

The answer is: C

3. Volume or bulk defecfs are called

A. Slip band

B. Dislocations

C. Vacancy

D. Voids

The answer is: D

4. Results from the alignment of impurities, inclusions and voids in the metal
during deformation.
A. Anistropy

B. Crystallographic anisotropy

B. Mechanical fibering

D. Annealing

The answer is: C

5. When the load is first applied, the specimen elongates in proportion to the
load. This effect is called________. If the load is removed, the specimen return
to its original length and shape, in an elastic process similar to stretching a
rubber band and realising it.

A. Linear elastic behavior

B. Engineering stress or nominal stress

C. Yield stress

D. Proportional limit

The answer is: A

6. Refers to the capability that some materials have to undergo large uniform
elongation prior to necking and fracture to tension.

A. Superplastic forming

B. Superplasticity

C. Barreling

D. Bauschinger effect

The answer is: B

7. This test is based on the capability of one material to scratch another based
on a scale from 1 to 10, with 1 being the measure for taic and 10 that for
diamond.

A. Brinell test
B. Rockwell test

C. Vickers test

D. Mohs hardness

The answer is: D

8. Many metals undergo a sharp change in ductility and toughness across a

narrow temperature range called.

A. Failure

B. Ductie fracture

C. Cup-and-cone fracture

D. Transition temperature

The answer is: D

9. Removing of surface oxides by chemical or electrochemical reaction.

A. Stress Releive

B. Hydrogen embrittlement

C. Residual stresses

D. Pickling

The answer is: D

10. Metal with highest melting point.

A. Magnesium

B. Lead

C. Tungsten

D. Aluminum

The answer is: C

11. Usually refers to the deterioration of plastics.

A. Optical properties

B. Corrosion

C. Degradation

D. Pitting

The answer is: C

12. Solidification begins with the temperature of the moiten metal drops below
the:

A. Liquidus

B. Solidus

C. Eutectic point

D. Solvus

The answer is: A

13. Which of the following is not a type of gray cast iron?

A. Ferritic

B. pearlitic

C. martensitic

D. All of these

The answer is: D

14. is an irreversible dimensional change of the part.

A. Quench cracking

B. Distortion

C. Size distortion
D. Shape distortion

The answer is: B

15. The property improvement is known as:

A. Aging

B. Age hardening

C. Precipitation hardening

D. Dispersion hardening

The answer is: B

16. Heat steel at 760-845°C in a molten bath of solution of cyanide and other
salts.

A. Carbonitriding

B. Cyaniding

C. Nitriding

D. Boronizing

The answer is: B

17. is a roundor rectangular box furnace without a bottom.

A. Box furnace

B. Pit furnace

C. Bell furnace

D. Elevator furnace

The answer is: C

18. Purpose of coke is to ________ required for chemical reactions in iron

making to takes place.
A. generate the high level of heat

B. carbon monoxide

C. plastics and chemical compounds

D. Remove impurities from the molten iron

The answer is: A

19. The electric furnace was first introduced into the:

A. China

B. Japan

C. USA

D. A and B

The answer is: C

20. The removal of impurities is known as:

A. Killed steel

B. Semi-killed

C. Rimmed steel

D. Refining

The answer is: D

21. Improves machinability

A. Niobium

B. Phosphorus

C. Selenium

D. Silicon

The answer is: C

22. Improves strength, toughness, abrasion, resistance, and hardness at
elavated temperature, it inhibits grain growth during heat treatment.

A. Titanium

B. Tungsten

C. Vanadium

D. Zirconium

The answer is: C

23. In order to improve the strength-to-weight of steels, a number of______

steels have been developed.

A. Alloy steel

B. Structural-grade alloy steels

C. High-strength, low-alloy (HSLA)

D. Weathering steel

The answer is: C

24. These steels contain chromium and nickel, along with copper, aluminum,
titanium, or molybdenum.

A. Austenitic stainless steels

B. Ferritic stainless steel

C. Martensitic stainless steels

D. Precipitation-hardening stainless steels

The answer is: D

25. Are used for cold-working operations. They generally have high resistance
to wear and cracking.These steels are available as oil-hardening or air-
hardening types.
A. Cold-working steels (A,D and O series)

B. Shocking-resisting steel (S-series)

C. T-series

D. Hot-work-steel (H-series)

The answer is: A

26. Block of aluminum have recently been produced that are 37% lighter that
solid aluminum and have uniform permeability.

A. Porous aluminum

B. Magnesium

C. Copper

D. Brass

The answer is: A

27. Composed of 70% Copper and 30% zinc.

A. Cartridge brass

B. Naval brass

C. Yellow brass

D. Red brass

The answer is: A

28. Used in high temperature stability, resistance to stress- corrosion cracking.

A. Monel K-500

B. Hastelloy C-4

C. Hastelloy

D. Invar
The answer is: B

29. The body-centered cubic structure of titanium, above 880°C is:

A. Ductile

B. Maleable

C. Nodular

D. Brittle

The answer is: A

30. Has silver gray in color, has high strength-to-weight ratio.

A. Niobium

B. Tungsten

C. Tantaium

D. Beryllium

The answer is: D

31. Because of their low friction coefficient, which result from low shear
strength and low adhesion, are used as journal-bearing.

A. Babbit

B. Tin alloys

C. Tin

D. Tin-lead

The answer is: A

32. A class of metal alloys whic, unlike metals, do not have long-range
crystalline structure.

A. Rapid solidification
B. Metallic glasses

C. Amorphous alloys

D. Glass

The answer is: C

33. If the repeating units in a polymer chain are all of the same type, the
molecule is called:

A. Molecular weight distribution

B. Degree of Polymerization

C. Covalent bonds

D. Homopolymer

The answer is: D

34. Have the structure of a thermoplastic but the nonmelting characteristics of

a thermoset.

A. Nylons

B. Aramids

C. Polyethylenes

D. Polyimides

The answer is: D

35. Are compounds of metallic and non-metallic elements.

A. Ceramics

B. Ceramics

C. Clay

D. Kaolin
The answer is: A

36. Consist of oxides, carbides and nitrides: used in high temperature

application.

A. Titanium nitride

B. Silicone nitride

C. Sialon

D. Cermets

The answer is: D

37. The tiles on the space shuttieare made of:

A. Porcelain

B. Silica fiver

C. Bioceramics

D. Aluminum oxide and silicone nitride

The answer is: B

38. Is the process of inducing chemical changesby heat.

A. Pyrolysis

B. Kelvar

C. Gating system

D. Sprue

The answer is: A

39. A more recently developed, high performance glass fiber, offering higher
resistance to elevate temperature and acid corrosion.
A. E-CR

B. Pyrolysis

C. Rayon and pitch

D. Aramids

The answer is: A

40. Long fibers generally have aspect ratios between.

A. 200 and 200

B. 200 and 300

C. 200 and 400

D. 200 and 500

The answer is: D

41. The molten metal is poured through a

A. Normal segregation

B. Gravity segregation

C. Heterogeneous nucleation

D. Pouring basin or cup

The answer is: D

42. Which are made of sand, plaster, ceramics, and similar materials.

A. Expendable moids

B. Permanent moids

C. Composite moids

D. Sand casting

The answer is: A

43. Consist of a cope on top and drag on the bottom.

A. Two-piece moid

B. Cores

C. Vents

D. Pattern

The answer is: A

44. Are made of two or more different materials and used in shell molding and
other casting process.

A. Shell-moid casting

B. Composite moids

C. Rammed graphite molding

D. Expendable pattern

The answer is: B

45. The product of the first hot-rolling is called:

A. Bloom or slab

B. Bloom

C. Slab

D. Billets

The answer is: A

46. A group of stands is called a

A. Two-high or three high

B. Tandem rolling

C. Train
D. Water-based

The answer is: C

47. Is a process in which a blank is forged into a shape with a tool that forms
the blank in several small steps.

A. Incremental forging

B. Isothermal forging or hot-die forging

C. Swaging

D. Radial forging or swaging

The answer is: A

48. This hammer has two rams that semultaneously approach each other
horizontally or vertically to forge the part.

A. Screw presses

B. Gravity drop hammer

C. Power drop hammer

D. Counterblow hammer

The answer is: D

49. The cross-section of a round rod or wire is typically reduced or changed

by pulling it through a die.

A. Hydrostatic extrusion

B. Drawing process

C. Sizing pass

D. All of these

The answer is: B

50. Soft metals( as well as paper, leather and rubber can be blank with
_________.

A. Lancing

B. Fine Blanking

C. Slitting

D. Steel rules

The answer is: D

51. Cones, hemisphere, and similar shapes are often formed by:

A. Tube drawing

B. Wire drawing

C. Spinning

D. Shear forming or flow turning

The answer is: D

52. In the basic method, a round-sheet metal blank is placed over a circular
die operating and is held in place with a _______.

A. Seaming

B. Roll forming

C. Bulging

D. Blank holder or hold-down ring

The answer is: D

53. Are used for many destructive purpose, in demolition work and in
warfare.

A. Magnetic pulse forming

B. Explosive forming
C. Peen forming

D. Laser forming

The answer is: B

54. Very fine metal are blended with either a polymer or a wax-based binder.

A. Hot isostatic pressing

B. Injection molding

C. Roll compaction

D. Compacted by extrusion

The answer is: B

55. Is the motion in which the clay bar is formed by means of templates or
rollers.

A. Jiggering

B. Hot pressing or pressure sintering

C. Firing

D. Nanophase ceramics

The answer is: A

56. Is done in a housing or case, which is an integral part of the product.

A. Centrifugal casting

B. Potting

C. Encapsulation

D. Solid-phase forming

The answer is: B

57. Is a basic geometric property of the tool.

A. Built-up edge

B. Serrated chips

C. Discontinues chips

D. Normal rake angle

The answer is: D

58. Cemented carbide are used for higher speed greater than:

A. 1000 ft/min

B. 1100 ft/min

C. 1200 ft/min

D. 1300 ft/min

The answer is: A

59. There are two basic types of high-speed steels:

A. Molybdenum and tungsten

B. Cast-cobalt alloys

C. Cast-cobalt alloys

D. Carbide or cemented of sintered carbide

The answer is: A

60. Developed in 1970. Consists of silicon nitride with various addition of

aluminum oxide, yitrium oxide, and titanium carbide.

A. Cermets

B. Cubic Boron nitride

C. Silicon-nitride based ceramics

D. Diamond
The answer is: C

61. Is a special vise that attaches to the cross slide to hold work.

A. Reamer

B. Taper attachment

C. Milling attachment

D. Knurling

The answer is: C

62. A section of the bed in front of the headstock can be removed to

accommodate larger diameter workplace.

A. Engine lathes

B. Gab bed lathes

C. Special-purpose lathes

D. Chuck

The answer is: B

63. Are machine tools with attachments that are capable of tuning parts with
various contours.

A. Tracer lathes

B. Automatic lathes

C. Automatic bar Machine

D. Turret lathes

The answer is: A

64. Are often used when several related operations, such us holes of different
sizes, reaming, or counterboring, must be done on a single part.

A. Gang-drilling machine
B. Turret-type drilling machines

C. Radial drilling machine tools

D. Multiple-spindle drilling machine

The answer is: A

65. Can be adjusted over a few thousands of an inch to compensate for wear
or to permit some variation in hole size to be obtained.

A. Expansion reamers

B. Adjustable reamers

C. Taper reamers

D. Roughing reamers

The answer is: A

66. Engage the work gradually, and usually more than one tooth cuts at a
given time

A. Right-hand cutter

B. Left-hand cutter

C. Plain milting cutters

D. Hefical milfs

The answer is: D

67. Milfing cutters are classified as either.

A. Angle mifling cutters

B. Shell milfs

C. Fly cutting

D. Arbor cutters or shank cutters

The answer is: D

68. Is important in that it provides a sufficiently wide kerf for the blade to
move freely in the workplace without binding and frictional resistance.

A. Tooth set

B. Smagging

C. Hacksaws

D. Circular saw

The answer is: A

69. Are suitable for large as well as tail workplace that required machining on
a number of their surfaces.

A. Work envelope

B. Vertical machining centers

C. Horizontal- spindle machining centers

D. Universal machining centers

The answer is: C

70. In addition to hardness, an important characteristics is:

A. Abrasive

B. Aluminum oxide and silicon carbide

C. Cubic boron nitrides and diamond

D. Friability

The answer is: D

71. Temperature gradients within the workplace during grinding are

primarily responsible for

A. Tempering and softening

B. Burn

C. Heat checking

D. Residual stresses

The answer is: D

72. Is done on cylindrical grinders with specially dressed wheels matching the
shape of the threads.

A. Thread grinding

B. Internal grinding

C. Centerless grinding

D. Through- feed grinding

The answer is: A

73. Damage to a grinding wheel can severely reduce it's:

A. Chatter

B. Bursting speed

C. Bursting speed

D. Ultrasonic machining

The answer is: B

74. Are thin ridge, usually triangular in shape, the develop along the edges of
a work-piece from machining from shearing sheet materials, and from
trimming forgings and castings.

A. Elecropolishing

B. Superfinishing

C. Burrs

D. Buffing
The answer is: C

75. The source of energy is a laser, which focusses optical energy on the
surface of the work-piece.

A. Laser-beam machining

B. Laser-beam machining

C. Plasma-arc cutting

D. Abrasive water-jet machining

The answer is: B

76. The temperature developed in the flame of oxyacetylene welding as result

of these reactions can reach:

A. 3100°C

B. 3200°C

C. 3300°C

D. 3400°C

The answer is: C

77. is used primarily for welding the edges of section vertically in one pass,
with the piece placed edges to edges.

A. Globular transfer

B. GMAW process

C. Flux-cored arc welding

D. Electrogas welding

The answer is: D

78. Pressure is applied to the workpiece through either dies or rolls.

A. Cold welding
B. Ultrasonic welding

C. Friction welding

D. Inertia friction welding

The answer is: A

79. Produces poor weld beads.

A. Porosity

B. Stag inclusion

C. Incomplete fusion

D. Incomplete penetration

The answer is: C

80. Brazing fluxes are generally made of:

A. Borax

B. Boric acid, borates, flourides

C. Chlorides

D. All of these

The answer is: D

81. Is used extensively in the electronic industry.

A. Ultrasonic soldering

B. Solder pastes

C. Wave soldering

D. Soldering

The answer is: D

82. This operation is fast and it is particularly sutation for joining thin
metallic and non-metallic materials.

A. Self- tapping

B. Riveting

C. Metal stiching or stapling

D. Seaming

The answer is: C

83. Is the science and technology of friction, wear and lubrication.

A. Optical interference microscope

B. Atomic force microscope

C. Tribology

D. Adhesion theory

The answer is: C

84. Are solid or semisolid lubricants and generally consists of soaps, meniral
oil and various additives.

A. Emulsifiers

B. Synthetic solutions

C. Soups

D. Grease

The answer is: D

85. Is used for nonconductive materials such as electrical insulators and

semiconductor device.

A. Sputtering

B. Reactive Sputtering
C. Radio-frequency sputter

D. Ion plating

The answer is: C

86. Is a much more entensive process and requires specialized equipment.

A. Epitaxy

B. Etching

C. Ion implantation

D. Electromigration

The answer is: C

87. Surface type of compressive stress is sometimes called.

A. Design stress

B. Factor of safety

C. Bearing stress

D. Modulus of elasticity

The answer is: C

88. Is the ability of a material to be deformed and to return to the original

shape.

A. Ductile material

B. Brittle materials

C. Elasticity

D. Embrittlement

The answer is: C

89. Is that stress which causes a specified permanent deformation of material
usually 0.01% or less.

A. Plasticity

B. Poisson's ratio

C. Preceptation heat treatment

D. Proof stress

The answer is: D

90. Is often used to mean tempering.

A. Aging

B. Annealing

C. Critical range

D. Drawing

The answer is: D

91. Load of 100 kg with 1/16 inch ball for medium metals as for many copper
alloys and soft steels.

A. Rockwell B

B. Rockwell C

C. Rockwell A

D. Rockwell D

The answer is: A

92. Nickel chromium steels with 4.50% 1.50% chromium.

A. 31XX

B. 32XX
C. 33XX

D. 34XX

The answer is: C

93. Nickel 3.50% - chromium 1.50%

A. 33XX

B. 40XX

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

C. Copper alloys

D. Copper

The answer is: A

100. Are about two-thirds as heavy as aluminum, lightness is one of the most
significant characteristics of this metal.

A. Yellow Brass

B. Aluminum alloys

C. Magnesium alloys

D. Magnesium

The answer is: C