Description : High speed steel should have high (A) Toughness (B) Wear resistance (C) Hardenability (D) Both (B) & (C)
Last Answer : (D) Both (B) & (C)
Description : High degree of toughness is a must for (A) High speed steel (B) Shock resisting steel (C) Cold work tool steel (D) None of these
Last Answer : (B) Shock resisting steel
Description : Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is (A) Used for making axle & shafts of aeroplanes, automobiles and locomotives (B) ... resistance (C) Having poor toughness (D) Not helpful in producing cleaner steel due to oxidising action of vanadium
Last Answer : (A) Used for making axle & shafts of aeroplanes, automobiles and locomotives
Description : Presence of manganese in alloy steel improves its (A) Corrosion resistance (B) Cutting ability (C) Abrasion resistance & toughness (D) Elasticity & creep resistance
Last Answer : (C) Abrasion resistance & toughness
Description : Shock resisting steels should possess high (A) Hardness (B) Toughness (C) Tensile strength (D) Wear resistance
Last Answer : (B) Toughness
Description : __________ of austenite decreases the hardenability in steel. (A) Fine grains (B) Coarse grains (C) Homogeneity (D) Dissolved elements (except cobalt)
Last Answer : (D) Dissolved elements (except cobalt)
Description : The hardenability of steel decreases with (A) Decrease in dislocation density (B) Increase in solutionising temperature (C) Increase in strength (D) Decrease in grain size
Last Answer : D) Decrease in grain size
Description : Maximum hardenability of steel depends upon its (A) Chemical composition (B) Carbon content (C) Grain size (D) Alloying elements content
Last Answer : Option D
Description : Steels with high carbon equivalent have poor Weldability, because in these steels during welding (A) Carbon and other alloying elements get oxidised from the weld pool (B) Excessive ferrite forms in the ... of carbon and other element occurs in the weld pool leading to poor properties of the weld
Last Answer : (C) Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
Description : Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are (A) Cobalt, chromium & tungsten (B) Cobalt, chromium & nickel (C) Molybdenum, tungsten & chromium (D) Cobalt, zirconium & molybdenum
Last Answer : : Option A
Description : Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by ... all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'
Last Answer : Option A
Description : Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part? (A) Anodising (B) Tempering (C) Carburising
Last Answer : (B) Tempering
Description : Pick out the correct statement. (A) Hot worked materials are subjected to annealing to remove internal stresses (B) Annealing of steel hardens it slightly (C) Normalising of a material induces stresses (D) Tempering of a material improves ductility & toughness but reduces hardness & brittleness
Last Answer : (D) Tempering of a material improves ductility & toughness but reduces hardness & brittleness Share
Description : Non-ferrous alloys used for making cutting tools need not have high (A) Abrasion resistance (B) Toughness (C) Red hardness (D) Cutting speed
Last Answer : (C) Red hardness
Description : Nickel and __________ are the alloying element added in steel to increase its toughness. (A) Molybdenum (B) Chromium (C) Vanadium (D) Silicon
Description : Pick out the wrong statement. (A) The toughness of a material decreases, when it is heated (B) Crane hooks are normally made of wrought iron (C) Cold working of a metal decreases its ... (D) The temperature at which new grains are formed in a metal is known as the recrystallisation temperature
Last Answer : (C) Cold working of a metal decreases its fatigue strength
Description : The ability of a material to offer resistance to scratching or indentation is a measure of its (A) Brittleness (B) Toughness (C) Hardness (D) Resilience
Last Answer : (C) Hardness
Description : A major difference between light cured and chemical cured composite is that during setting or in function the light cured material tends to:******** VERY IMP A. Seal the margins better and ... on time C. Undergo greater colour change D. Shrink more rapidly E. Posses greater fracture toughness
Last Answer : D. Shrink more rapidly
Description : Mild steel is (A) A low carbon steel (0.05 to 0.3% carbon) (B) Highly resistant to corrosion (as much as stainless steel) (C) A high carbon steel (0.5 to 1.5% carbon) (D) Very poor in strength & ductility
Last Answer : (A) A low carbon steel (0.05 to 0.3% carbon)
Description : Weld decay will cause which of the following problems? a) A reduced resistance to corrosion b) a lower tensile strength c) The toughness is reduced d) The hardness will increase
Last Answer : a) A reduced resistance to corrosion
Description : Which of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness? (A) Phosphorous (B) Carbon black (C) Pine oil (D) Rosin
Last Answer : (B) Carbon black
Description : The formation of oxide film on a metal due to atmospheric exposure reduces its (A) Toughness (B) Stiffness (C) Creep limit (D) All (A), (B) & (C)
Last Answer : (C) Creep limit
Description : High ash coals (A) Are soft & friable (poor strength and size stability) (B) Require longer time of carbonisation as ash offers resistance to heat transfer (C) Produce larger quantity of coke oven gas (D) None of these
Last Answer : (A) Are soft & friable (poor strength and size stability)
Description : Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel. (A) Wrought (B) Tool (C) Alloy (D) Plain carbon
Last Answer : (D) Plain carbon
Description : Presence of nickel in steel improves its (A) Corrosion resistance (B) Cutting ability (C) Wear resistance (D) All (A), (B) and (C
Last Answer : (A) Corrosion resistance
Description : Nitriding of a steel part does not increase its (A) Grain size (B) Fatigue limit (C) Surface hardness (D) Wear resistance
Last Answer : Option B
Description : Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser? (A) Ethylene glycol (B) Stearic acid estors (C) Tricresyl phosphate (D) Esters of phthalic acid
Last Answer : (A) Ethylene glycol
Description : A bearing metal should not have (A) Enough plasticity (B) Low thermal conductivity (C) Low co-efficient of friction (D) High toughness
Last Answer : (B) Low thermal conductivity
Description : Coarse grained steels have (A) Low toughness (B) No tendency to distort (C) High density (D) Very high toughness
Last Answer : (B) No tendency to distort
Description : High purity nitrogen is used in (A) Making protective gas (95% N2 + 5% H2 ) for annealing of cold rolled steel strip coils (B) Fire fighting purposes (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : Cold chisel & hammers are made of (A) High speed steel (B) High carbon steel (C) Forged steel (D) Mild steel
Last Answer : (B) High carbon steel
Description : The ability of tool steel to resist softening at high temperatures is termed as __________ hardness. (A) Red (B) Extended (C) Super (D) Extreme
Last Answer : (C) Super
Description : Highest cutting speed is achieved by the __________ tool material. (A) High speed steel (B) Carbide (C) Cast alloy (D) Plain carbon steel
Last Answer : (B) Carbide
Description : Detrimental property of a material for shock load applications (a) High density (b) Low toughness (c) High strength (d) Low hardness
Last Answer : (b) Low toughness
Description : Grindability of a material does not depend upon its (A) Elasticity (B) Hardness (C) Toughness (D) Size
Last Answer : (D) Size
Description : Which of the following mechanical properties of a material is most structure insensitive? (A) Modulus of elasticity (young's modulus) (B) Toughness (C) Percentage reduction of area (D) Tensile strength
Last Answer : (A) Modulus of elasticity (young's modulus)
Description : The ability of a material to absorb energy in the elastic range is a measure of its (A) Toughness (B) Resilience (C) Malleability (D) Brittleness
Last Answer : (B) Resilience
Description : Percentage elongation of a material is a measure of its (A) Ductility (B) Brittleness (C) Toughness (D) Malleability
Last Answer : (A) Ductility
Description : Ability of a material to absorb energy in deformation in the plastic range is characterised as its (A) Ductility (B) Toughness (C) Creep (D) Resilience
Description : Amount of energy that a material can absorb before its fracture is a measure of its (A) Toughness (B) Resilience (C) Malleability
Last Answer : (A) Toughness
Description : The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the (A) Resilience (B) Toughness (C) Ductility (D) Impact strength
Last Answer : (A) Resilience
Description : The property of material, by which a given amount of energy is absorbed by it, without plastic deformation, is called (A) Resilience (B) Toughness (C) Ductility (D) Impact strength
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 : On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is (A) Creep (B) Toughness (C) Tensile strength (D) Fatigue
Last Answer : (B) Toughnes
Description : Most important property of steels for use in automobile bodies is the (A) Formability (B) Yield strength (C) Toughness (D) Resilience
Last Answer : (A) Formability
Description : Tempering of a material does not improve its (A) Machinability (B) Toughness (C) Internal stress level (D) Softness
Last Answer : A) Machinability
Description : The most serious manufacturing defect from fracture toughness point of view is (A) Surface roughness (B) Pores (C) Spherical inclusion (D) Crack
Description : High ash containing coke (A) Produces more slag when used in the blast furnace (B) Has poor strength and abrasion resistance (C) Is desirable in producer gas manufacture (D) None of these
Last Answer : (A) Produces more slag when used in the blast furnace
Description : Cutter bar is made up of which material a) High grade steel. b) Low carbon alloy steel. c) Platinum. d) High speed tool steel
Last Answer : High grade steel
Description : __________ of hard alloy and tool steel is done to make it easily machinable. (A) Case carburising (B) Tempering (C) Normalising (D) Annealing