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machine elements > M0.2 > Flashcards

M0.2 Flashcards

1
Q

Which of the following is the major
alloying element in Invar?

A

Nickel

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2
Q

Which of the following is available in five
slightly different nominal composition for application which
require high strength, good fabricating and fusing qualities,
immunity to rust, free machining and a corrosion resistance
equivalent to copper?

A

Everdur

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3
Q

Aluminum is particularly satisfactory for
applications requiring all of the following characteristics,
EXCEPT:

A

High strength

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4
Q

It is a polymer of chloroprene of the
monovinyl acetylene type.

A

Neoprene

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5
Q

Why are Plasticizers added to plastics?

A

To increase flexibility of materials

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6
Q

Which of the following superalloy is age-hardenable?

A

Inconel

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7
Q

What is a unique form of cast iron with worm shaped graphite particles?

A

Compacted graphitic iron

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8
Q

Kevlar epoxy composite is widely used
in:

A

Automobiles

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9
Q

It is an age hardenable wrought alloy
which has mechanical properties comparable to those of heat-treated alloy steel of the same order of hardness and resistance to corrosion like that of Monel. What is this alloy
of nickel?

A

K Monel

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10
Q

An interrupted quenching process
resulting in an austenite to martensite transition is _______.

A

Martempering

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11
Q

When more than one spring or resisting members share the load, the relative stiffness is the _______.

A

Rigidity

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12
Q

In sulfuric acid, which of the following
is suitable for handling acid in concentrations up to 50% and at a temperature including the boiling point?

A

Hastelloy B

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13
Q

Mechanical impact devices that accept material smaller than approximately 4 inches.

A

Fine impact mills

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14
Q

An interrupted quenching process
resulting in an austenite to bainite transition is_______.

A

Austempering

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15
Q

Which of the following is one of the best methods for increasing a spring’s fatigue life?

A

Shot peening

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16
Q

What is the lightest known metal?

A

Aluminum

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17
Q

Material having a high electrical
resistance and should not be used as a conductor of electrical current.

A

Iron

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18
Q

The property that characterizes a
material’s ability to be drawn into a wire.

A

Ductility

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19
Q

The carbon content range percentage in steel that readily responds to heat treatment.

A

0.35 - 0.40

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20
Q

A number indicating how many times a certain volume of a material is heavier than an equal volume
of water.

A

Specific gravity

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21
Q

The characteristic of tool steel to
sustain shocks and major impact.

A

Toughness

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22
Q

A good general-purpose deoxidizer
which promotes fine grain in steel.

A

Silicon

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23
Q

It is a hardening treatment whereby a cast metal is being heat treated to a very high temperature
(above the recrystallization phase) then suddenly subjected
to rapid cooling to improve hardenability of wear resistance.

A

Quenching

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24
Q

A treatment process that produces a
residual compressive stress at the surface and residual tension on the inside that results in considerable increase in fatigue strength for members of tension/bending.

A

Shallow quenching

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25
Q

Normally, cast iron contains 2% carbon or more and silicon in the range of _____ %.

A

1 to 3

26
Q

The SAE designation for steel composed of nickel, chromium, and molybdenum.

A

94XX

27
Q

The material for engine radiation is
usually made of ________.

A

Yellow brass

28
Q

A problem by-product used as an
electrode in an electric arc furnace melting operation.

A

Graphite electrodes

29
Q

Which of the following does not affect the tensile strength of steel?

A

Boron

30
Q

Mirror finish specimen has surface
roughness of:

A

1 rms

31
Q

Chromium steel to include and
corrosion resistant designation.

A

SAE 514XX

32
Q

A non-metallic material of high melting temperature being used as a furnace lining.

A

Refractories

33
Q

What is the silicon-manganese steel designation?

A

92XX

34
Q

A major alloying element in tool steels.

A

Chromium

35
Q

The material that can wear/cut
materials subjected to:

A

Abrasive

36
Q

Not adaptable to welding due to low
tensile strength and poor ductility, etc.

A

Aluminum parts

37
Q

Which of the following is not a
viscoelastic material?

A

Metal

38
Q

These steels (SAE Steels 1006, 1008, 1010,
1015)are the lowest carbon steels of the plain carbon type, and are selected where _______ is the primary requisite of the user.

A

Cold formability

39
Q

In manufacturing, what is the operation of cutting out flat area to some desired shape and is usually the first step in a series of operation?

A

Blanking

40
Q

An instrument that measures the hardness of the work piece in terms of elasticity.

A

Durometer

41
Q

The ability of metal to stretch, bend or twist without breaking or cracking.

A

Ductility

42
Q

The property of material wherein the content is continuously distributed through its entire mass

A

Homogeneity

43
Q

Alloy steel axle under repeated stress will eventually fail if the stress is above the endurance for the
axle. What is the endurance limit of steel?

A

One-half of the ultimate strength

44
Q

Which of the following steels does not readily respond to heat treatment?

A

SAE 1020

45
Q

Which of the following material has 66% Nickel, 29% Copper, and 3% Aluminum?

A

K Monel

46
Q

Gasket material which should avoid hot liquid/steam application.

A

Rubberized

47
Q

In greater quantity, this element is harmful to the molten ferrous metal.

A

Sulfur

48
Q

Steel designation SAE 51xxx belongs to the________ steel family.

A

Chromium

49
Q

This iron is also known as a ductile cast iron. What do you call this iron?

A

Nodular cast iron

50
Q

A fine-grained salty silica rock used for sharpening edge tools.

A

Oilstone

51
Q

The SAE 2340 shafting contain ____ % Nickel.

A

3.25 to 3.75%

52
Q

Specification of molybdenum alloy

A

SAE 4XXX

53
Q

Chromium steel standard designation:

A

SAE 5XXX

54
Q

Plain carbon steel standard designation:

A

SAE 10XX

55
Q

Manganese steel standard designation:

A

SAE 13XX

56
Q

Molybdenum-chromium-nickel steel
designation.

A

SAE 43XX

57
Q

Molybdenum steel standard designation.

A

SAE 40XX

58
Q

Steel plates allowable tensile strength.

A

396.41 N/m²

59
Q

In general, alloys with high nickel content retain toughness to quiet low temperatures up to _____°F.

A

-320

60
Q

These are steels most widely used of
engineering materials, no other material offers comparable versatility for product design.

A

Wrought steels

61
Q

An 18-8 stainless steel means:

A

18% nickel and 8% chromium

62
Q

The shear stress along the principal plane subjected to maximum principal stress is:

A

Zero

machine elements (4 decks)

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