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Macdes Blue Book Terms
  • Warner Cunanan

  • 問題数 69 • 11/29/2024

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    問題一覧

  • 1

    Which of the following is not true for an instant center or centro of planar linkages?

    Centro is a point in one body about which another body does tend to rotate.

  • 2

    The size to which a limit of deviations is assigned and is the same for both members of the fit, it is the exact theoretical size.

    Basic size

  • 3

    The property of a material that measures the degree of plastic deformation sustained at fracture.

    Ductility

  • 4

    The opposite of clearance, for mating cylindrical parts in which the internal member is larger than the external member

    Interference

  • 5

    The combination of two or more materials, usually consisting of fiber and thermosetting polymer.

    Composite materials

  • 6

    A machining operation for all types of metallic and nonmetallic materials and is capable of producing circular parts with straight or various profiles

    Turning

  • 7

    A lubrication where the load-carrying surfaces of the bearing are separated by a relatively thick film of lubricant, so as to prevent metal to metal contact, and where the stability of the film can be explained by the laws of fluid mechanics.

    Hydrodynamic lubrication

  • 8

    A journal bearing where the radius of the journal is less than the radius of the bushing or bearing.

    Clearance journal bearing

  • 9

    A failure prediction theory, which states that a part subjected to any combination of loads, will fail (by yielding and fracturing) whenever the maximum shear stress exceeds a critical value.

    Maximum-shear-stress theory

  • 10

    The most common work holding devices of a shaper machine with the base graduated in degrees that make it possible to swivel any angle.

    Shaper vise

  • 11

    A speed at which rotating shaft becomes dynamically unstable.

    Critical Speed

  • 12

    “For planar four bar linkage, the sum of the shortest and the longest lengths cannot be greater than the sum of the remaining two links” lengths if there is to be a continuous relative rotation between the two member” The preceding statement is known as:

    Grashof’s law

  • 13

    The ability of the material to absorb energy up to fracture.

    Toughness

  • 14

    It is defined as synergistic collection of machine elements; synergistic because as a design it represents an idea or concept greater than the sum of the individual parts.

    Mechanical system

  • 15

    A set of specification for the analysis, design, manufacture, and construction of something; the purpose of which is to achieve a specified degree of safety, efficiency, and performance or quality.

    Code

  • 16

    Either the upper of the lower deviation, depending on which is closer to the basic size.

    Fundamental deviation

  • 17

    The trade name for a patented alloy made up chiefly of cobalt, chromium, and tungsten varying proportions.

    Stellite

  • 18

    It is a load applied transversely to longitudinal axis of member.

    Bending load

  • 19

    A ball bearing with race containing pronounced groove for rolling elements.

    Conrad bearing

  • 20

    A machining process for producing internal straight cylindrical surface or profiles, with process characteristics and tooling similar to those for turning operations.

    Boring

  • 21

    Shaper operation which is shaping the given stock and having the excess material remain with a tolerable allowance for finishing.

    Roughing

  • 22

    A sketch of a machine, a machine element, or part of a machine element that shows all acting forces, such as applied load and gravity forces, and all reactive forces.

    Free body diagram

  • 23

    A set of specification for parts, materials, or processes intended to achieve uniformity, efficiency, and a specified quality.

    Standard

  • 24

    It is a load applied transversely to longitudinal axis of member.

    Bending load

  • 25

    A failure prediction theory in which failure is caused by the elastic energy associated with shear deformation.

    Distorsion-energy theory

  • 26

    The algebraic difference between the minimum limit and the corresponding basic.

    Fundamental deviation

  • 27

    A material having different properties in all directions at point in solid.

    Anisotropic material

  • 28

    A principal or method that a deflection at any point in bar is equal to sum f deflection caused by each load acting separately.

    Method of superposition

  • 29

    Compounds of metallic elements, most frequently oxides, nitrides, and carbides.

    Ceramics

  • 30

    A theorem stating that “when a body is elastically deformed by a system of loads, the deflection at any point p in any direction a is equal to the partial derivatives of the strain energy (with the system of loads acting) with respect to a load at p in the direction a”.

    Castigliano’s Theorem

  • 31

    It is the strain energy per unit volume required to stress a material from an unloaded state to the point of yielding.

    Modulus of resilience

  • 32

    The minimum stated clearance or the maximum stated interference for mating parts.

    Allowance

  • 33

    A material having different properties in three mutually perpendicular directions at point in solid and having three mutually perpendicular planes of material symmetry

    Orthotropic material

  • 34

    It is a combination of mechanisms and other components that transform, transmits, or uses energy, load, or motion for a specific purpose.

    Machine

  • 35

    It is the intensity and direction of internal force acting at given point on particular plane.

    Stress

  • 36

    A Grashof four-bar mechanism in which the shorted link is the frame or the fixed link and the other two cranks completely rotate with their axes.

    Drank link mechanism

  • 37

    In a straight bevel gear, the angle between an element of the pitch cone and an element of the face cone is called:

    Addendum angle

  • 38

    It is the intensity and direction of internal force acting at a given point on particular plane.

    Stress

  • 39

    It is the capacity of a material to absorb energy when it is deformed elasticity and then, upon unloading, to release this energy.

    Resilience

  • 40

    A machining process for producing internal straight cylindrical surface or profiles, with process characteristics and tooling similar to those for turning operations.

    Boring

  • 41

    An American nonprofit society, founded in 1921, whose objectives are to improve and advance the use of fabricated structural stress.

    American Iron Steel Institute (AISI)

  • 42

    The Maximum Shear Stress Theory, as a failure prediction theory, is also known as:

    Tresca yield criterion

  • 43

    A lubrication where the load-carrying surfaces of the bearing are separated by a relatively thick film of lubricant, so as to prevent metal to metal contact, and where the stability of the film can be explained by the laws of fluid mechanics.

    Hydrodynamic lubrication

  • 44

    A failure prediction theory, which states that a part subjected to any combination of loads, will fail (by yielding or fracturing) whenever the maximum shear stress exceeds a critical value.

    Maximim-shear-stress theory

  • 45

    A lubrication condition where non-conformal surfaces are completely separated by lubricant film and no asperities are in contact.

    Elastohydrodynamic lubrication

  • 46

    A machining operation for all types of metallic and nonmetallic materials and is capable of producing circular parts with straight of various profiles.

    Turning

  • 47

    The ability of the material to absorb energy up to the fracture.

    Toughness

  • 48

    The transformation of concepts and ideas into useful machinery is called as:

    Design

  • 49

    A general term that refers to the mating of cylindrical parts such as bolt or a hole; it is used only when the internal member is smaller that the external member.

    Clearance

  • 50

    A cutting tool that has two or more cutting edges as in drill presses and milling machine cutters.

    Multi-point cutting tool

  • 51

    It may be defined the displacement per length produced in a solid as the result of stress.

    Strain

  • 52

    It is the capacity of a material to absorb energy when it is deformed elastically and then, upon unloading, to release this energy

    Resilience

  • 53

    It is the strain energy per unit volume required to stress a material from an unloaded state to the point of yielding.

    Modulus of resilience

  • 54

    A speed at which rotating shaft becomes dynamic unstable.

    Critical speed

  • 55

    It may be define the displacement per length produced in a solid as a result of stress.

    Strain

  • 56

    The algebraic difference between the maximum limit and the corresponding basic.

    Upper Deviation

  • 57

    It is defined as synergistic collection of machine elements; synergistic because as a design it represents an idea or concept greater than the sum of the individual parts.

    Mechanical system

  • 58

    The algebraic difference between a size and the corresponding basic size.

    Allowance

  • 59

    The stated maximum and minimum dimensions.

    Limits

  • 60

    A journal bearing where the radius of the journal is less than the radius of the bushing or bearing.

    Clearance journal bearing

  • 61

    The combination of applied normal and shear stresses that produces maximum principal normal stress, with a third principal stress between or equivalent to the extremes.

    Bending and shear stress

  • 62

    The combination of applied normal and shear stresses that produces maximum principal normal stress, with a third principal stress between or equivalent to the extremes

    Bending and shear stress

  • 63

    A four bar mechanism in which one of the links can perform a full rotation relative to the other three links.

    Grashof mechanism

  • 64

    A lubrication condition where non-conformal surfaces are completely separated by lubricant film and no asperities are in contact.

    Elastohydrodynamic lubrication

  • 65

    The difference between the maximum and minimum size limits of a part.

    Tolerance

  • 66

    A ball bearing with race contacting pronounced groove for rolling elements.

    Conrad bearing

  • 67

    A theory in a cyclic and impact loading, which states that damage at any stress level is proportional ro the number of cycles.

    Miner’s rule

  • 68

    The Maximum Shear Stress Theory, as a failure prediction theory, is also known as:

    Tresca yield criterion

  • 69

    A theory in cyclic and impact loading, which states that damage at any stress level is proportional to the number of cycles.

    Mine’s rule