Description : Temper brittleness of a material can be fairly detected by the __________ test. (A) Fatigue (B) Notched bar impact (C) Tensile (D) Hardness
Last Answer : Option B
Description : Charpy impact tests showing a rough torn surface after the completed test, this would indicate which type of failure? a) Fatigue b) Ductile c) Fatigue to ductile d) Brittle
Last Answer : b) Ductile
Description : Cast iron is a __________ material. (A) Brittle (B) Ductile (C) Tough (D) Malleable
Last Answer : (A) Brittle
Description : With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected. (A) Impact strength (B) Percent elongation (C) Hardness (D) Both 'b' & 'c'
Last Answer : (A) Impact strength
Description : A material capable of undergoing large permanent deformation, when subjected to compression is termed as (A) Malleable (B) Ductile (C) Brittle (D) None of these
Last Answer : (A) Malleable
Description : . A material capable of undergoing large permanent deformation, when subjected to tension is termed as (A) Friable (B) Ductile (C) Brittle (D) None of these
Last Answer : (B) Ductile
Description : A dense structure of grinding wheel is not used for the (A) Ductile material (B) Hard materials (C) Brittle materials (D) Finishing cuts
Last Answer : A) Ductile material
Description : Polystyrene is a __________ plastic at room temperature. (A) Ductile (B) Brittle (C) Malleable (D) None of these
Last Answer : (B) Brittle
Description : Zinc is highly __________ at room temperature. (A) Ductile (B) Resistant to atmospheric corrosion (C) Malleable (D) Brittle
Last Answer : (B) Resistant to atmospheric corrosion
Description : Steel produced from phosphatic iron is __________ in nature. (A) Malleable (B) Ductile (C) Brittle (D) Tough
Last Answer : (C) Brittle
Description : The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel. (A) Carbon (B) Manganese (C) Both 'a' nor 'b' (D) Neither 'a' nor 'b'
Last Answer : (A) Carbon
Description : During a tensile test on a ductile material (A) Nominal stress at fracture is higher than the ultimate stress (B) True stress at fracture is higher than the ultimate stress (C) True stress at fracture is the same as the ultimate stress (D) None of these
Last Answer : (B) True stress at fracture is higher than the ultimate stress
Description : In which of the following case stress concentration factor is ignored? a) Ductile material under static load b) Ductile material under fluctuating load c) Brittle material under static load
Last Answer : a) Ductile material under static load
Description : Pick up the correct statement from the following: (A) A ductile material has large plastic zone (B) A brittle material has no plastic zone (C) A rigid material has no plastic zone (D) All the above
Last Answer : All the above
Description : The material in which large deformation is possible before absolute failure by rupture takes place, is known as (a) Ductile (b) Plastic (c) Brittle (d) Elastic
Last Answer : Ductile
Description : Which stress strain curve is more steep (a) For a ductile material (b) For a brittle material (c) For a pure metal (d) None
Last Answer : b) For a brittle material
Description : Define factor of safety for ductile and brittle material.
Last Answer : Factor of safety for ductile material: It is defined as ratio of yield stress to the working stress or Factor of safety for Brittle material : It is defined as ratio of ultimate stress to the working stress /permissible /design stress or
Description : Case hardening of a material is (A) Followed by tempering or carburising (B) Preceded by its tempering (C) Done to get a soft ductile interior with a very hard surface (D) Carried out to get extreme hardness in its core
Last Answer : (D) Carried out to get extreme hardness in its core
Description : The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as (A) Rigid (B) Tough (C) Ductile (D) Plastic
Last Answer : Option C
Description : A power transmitting ductile material shaft under P, T and M will fail under (a) Tensile considerations only (b) Compressive considerations only (c) Shear considerations only (d) None
Last Answer : (c) Shear considerations only
Description : . __________ test can be termed as the semi-destructive test. (A) Impact (B) Torsion (C) Hardness (D) Charpy
Description : 'Shock-absorbers are usually made of steel as it – (1) is not brittle (2) has lower elasticity (3) has higher elasticity (4) has no ductile property
Last Answer : (3) has higher elasticity Explanation: A shock absorber is a mechanical device designed to smooth out or damp shock impulse, and dissipate kinetic energy. Steel is an alloy made by combining iron and other elements, the most common of these being carbon.
Description : Which theories of failure are used for (a) ductile materials, and (B) brittle materials ?
Last Answer : For ductile materials, theories of failure used are maximum shear stress theory, and maximum energy of distortion theory; while for brittle materials, theory of maximum principal stress, and maximum strain are used.
Description : List at least two factors that promote transition from ductile to brittle fracture.
Last Answer : Manner of loading, and the rate of loading promote transition from ductile to brittle frac¬ture. A machine member may have ductile failure under static loading but may fail in brittle fashion when the ... testing speed but if load is applied at a high velocity then failure may be brittle.
Description : Substances that elongate considerably and undergo plastic deformation before they break are known as A. brittle substances B. breakable substances C. ductile substances D. elastic substances
Last Answer : ductile substances
Description : Maximum total strain energy theory is applicable to (a) Ductile materials (b) Brittle materials (c) Composite materials (d) None
Last Answer : (a) Ductile materials
Last Answer : (b) Brittle materials
Description : Maximum principal strain theory is applicable to (a) Ductile materials (b) Brittle materials (c) Composite materials (d) None
Description : Maximum shear stress theory is applicable to (a) Ductile materials (b) Brittle materials (c) Composite materials
Description : Maximum principal stress theory is applicable to (a) Ductile materials (b) Brittle materials (c) Composite materials (d) None
Description : What Is Ductile-brittle Transition Temperature?
Last Answer : It is the temperature below which the tendency of a material to fracture increases rather than forming. Below this temperature the material loses its ductility. It is also called Nil Ductility Temperature
Description : Which Theories Of Failure Are Used For? (a) Ductile Materials (b) Brittle Materials?
Last Answer : For ductile materials, theories of failure used are maximum shear stress theory and maximum energy of distortion theory; For brittle materials, the theory of maximum principal stress and maximum strain are used.
Description : List At Least Two Factors That Promote The Transition From Ductile To Brittle Fracture?
Last Answer : The manner of loading and the rate of loading promote the transition from ductile to brittle fracture. A machine member may have ductile failure under static loading but may fail in brittle fashion when the ... testing speed, but if the load is applied at a high velocity then failure may be brittle.
Description : Distinguish Between Brittle Fracture And Ductile Fracture?
Last Answer : In brittle fracture, crack growth is up to a small depth of the material. In ductile fracture large amount of plastic deformation is present to a higher depth.
Description : The substance which undergo plastic deformation until break is a) Brittle b) Ductile c) Hard d) Soft
Last Answer : d) Soft
Description : The substance which break just after elastic limit: a) Ductile b) Brittle c) Soft d) Hard
Last Answer : d) Hard
Description : 'Shock-absorbers' are usually made of steel as it : (1) is not brittle (2) has lower elasticity (3) has higher elasticity (4) has no ductile property
Last Answer : has higher elasticity
Description : _______ property of a material is determined by the Herbert Pendulum device. (A) Hardness (B) Tensile (C) Toughness (D) Compressive
Last Answer : (A) Hardness
Description : In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases. (A) Percentage elongation (B) Brinell hardness (C) Tensile strength (D) All 'a', 'b' & 'c'
Last Answer : (A) Percentage elongation
Description : Presence of nitrogen in steel (A) Makes it brittle (B) Increases its strength (C) Increases its hardness (D) Is desirable
Last Answer : (A) Makes it brittle
Description : Wrought iron is not (A) Ductile & resistant to corrosion/rusting (B) Weldable easily (C) Having uniform strength in all directions (D) Having maximum tensile strength along the lines of slag distribution
Description : Which of the following is prone to cup and cone fracture? (A) Cast iron (B) Soft brass (C) Round specimen of ductile metal (D) Flat tensile specimen of ductile metal
Description : Which of the following theories of failure is most appropriate for a brittle material? (a) Maximum principal strain theory (b) Maximum principal stress theory (c) Maximum shear stress theory (d) Maximum strain energy theory
Last Answer : (b) Maximum principal stress theory
Description : Which of the following in NOT a quantitative test? a) Root bend b) Macro hardness c) Charpy d) Tensile
Last Answer : a) Root bend
Description : Cast iron is (A) Used for making shock resisting parts (B) Manufactured in cupola and is brittle (C) Having compressive strength more than its tensile strength (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Dorry's testing machine is used for (A) Crushing test of stone (B) Hardness test of stone (C) Impact test of stone (D) Water absorption test
Last Answer : Answer: Option B
Description : . In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher (A) Densities (B) Melting point (C) Tensile strength (D) Hardness, rigidity & brittleness
Last Answer : (D) Hardness, rigidity & brittleness
Description : Cast irons are generally specified by their (A) Carbon content (B) Tensile strength (C) Hardness (D) Manufacturing process
Last Answer : (B) Tensile strength
Description : Shock resisting steels should possess high (A) Hardness (B) Toughness (C) Tensile strength (D) Wear resistance
Last Answer : (B) Toughness
Description : Manganese in steel affects its (A) Ductility (B) Tensile strength (C) Hardness (D) None of these