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 : Primary designation of steel is based on its (A) Hardness & tensile strength (B) Carbon content (C) Iron content (D) Alloying elements content
Last Answer : (D) Alloying elements content Sh
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 : Which of the following alloying elements is present in maximum percentage in high speed steel? (A) Molybdenum (B) Chromium (C) Tungsten (D) Vanadium
Last Answer : (C) Tungsten
Last Answer : (A) Molybdenum
Description : Chemical reaction rate of a component depends upon the (A) Composition of the component only (B) Temperature of the system (C) Pressure of the system (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : All of the following alloying elements of steel increases hardness but sacrifice ductility, except (A) Nickel (B) Vanadium (C) Molybdenum (D) Chromium
Last Answer : (A) Nickel
Description : Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are: (A) Nickel, cobalt & chromium (B) Tungsten, chromium & cobalt (C) Manganese, chromium & cobalt (D) Tungsten, molybdenum & nickel
Last Answer : Option B
Description : Cold work tool steel should have (A) High toughness (B) Poor hardenability (C) High wear resistance (D) All (A), (B) & (C)
Last Answer : (C) High wear resistance
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 : 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 : State the effects of alloying elements on properties of steel.
Last Answer : Effects of Alloying Element on steel:(Any 04 - 01 Mark each) 1) Nickel: i) It improves Toughness ii) It improves Tensile Strength iii) It improves Ductility iv) It improves Corrosion Resistance ... Impact Strength iii) It improves Fine Grain Growth iv) It is also called as Columbium
Description : Which of the following are alloying materials used the manufacture of stainless steel? w) Limestone and carbon x) Calcium oxide and oxygen y) Oxygen and sulfur dioxide z) Chromium and nickel
Last Answer : ANSWER: Z -- CHROMIUM AND NICKEL
Description : Diffusion co-efficient of a metal in a solid solution depends upon its (A) Composition (B) Temperature (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : In a continuous flow stirred tank reactor, the composition of the exit stream (A) Is same as that in the reactor (B) Is different than that in the reactor (C) Depends upon the flow rate of inlet stream (D) None of these
Last Answer : (A) Is same as that in the reactor
Description : In a homogeneous solution, the activity co-efficient of a component depends upon the (A) Pressure (B) Composition (C) Temperature (D) All (A), (B) and (C)
Description : In a homogeneous solution, the fugacity of a component depends upon the (A) Pressure (B) Composition (C) Temperature (D) All (A), (B) and (C)
Description : The major difference between breccia and conglomerate is (A)size of grain (B) shape of grain (C) composition of grain (D)all of these
Last Answer : shape of grain
Description : With decrease in the grain size of a material, its creep resistance (A) Increases (B) Decreases (C) Remain constant (D) Either (A) or (B); depends on the material
Last Answer : (C) Remain constant
Description : Laughing gas has chemical composition of following two elements ? A. Nitrogen + Hydrogen B. Nitrogen + Carbon C. Nitrogen + Oxygen (Answer) D. Oxygen + Carbon E. None of these
Last Answer : C. Nitrogen + Oxygen (Answer)
Description : Pick out the correct statement. (A) Stainless steel is nothing but chromium coated steel (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal (C) ... its temporary distortion under the action of applied stress (D) Rusting of iron is not electrochemical in nature
Last Answer : (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal
Description : Nickel and __________ are the alloying element added in steel to increase its toughness. (A) Molybdenum (B) Chromium (C) Vanadium (D) Silicon
Last Answer : Option D
Description : The maximum dry density upto which any soil can be compacted depends upon (A) Moisture content only (B) Amount of compaction energy only (C) Both moisture content and amount of compaction energy (D) None of the above
Last Answer : (C) Both moisture content and amount of compaction energy
Description : The maximum dry density to which a soil may be compacted to depends upon a) Soil water content * b) The process of compaction c) The voids ratio d) Is independent of the type of soil
Last Answer : a) Soil water content *
Description : Secondary hardening in steels arises out of the (A) Precipitation of fine alloy carbides at high temperatures (B) Refinement of ferrite grain size by working (C) Decomposition of retained austenite upon heat treatment (D) Precipitation of complex inter-metallic upon heat treatment
Last Answer : Option C
Description : Coating provided on the electrodes used in the arc welding is not expected to (A) Add alloying elements (B) Prevent electrode from contamination (C) Stabilise the arc (D) Provide protective atmosphere to weld
Last Answer : (B) Prevent electrode from contamination
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) Hardening makes the steel more brittle (B) High alloy steels contain more than 50% alloying element (C) 18/8 stainless steel is a magnetic steel (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Which of the following is not a principal alloying element for the structural steel? (A) Molybdenum (B) Nickel (C) Manganese (D) Chromium
Description : The ability of the cell membrane to act as a selective barrier depends upon (A) The lipid composition of the membrane (B) The pores which allows small molecules (C) The special mediated transport systems (D) All of these
Last Answer : D
Description : Nitriding of a steel part does not increase its (A) Grain size (B) Fatigue limit (C) Surface hardness (D) Wear resistance
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 : The chemical potential of any constituent of an ideal solution depends on the __________ of the solution. (A) Temperature (B) Pressure (C) Composition (D) All (A), (B) and (C)
Description : Stoke's law states that the velocity at which a grain settles out of suspension, the other factors remaining constant, is dependent upon (A) Shape of grain (B) Weight of grain (C) Size of grain (D) Shape, size and weight of grain
Last Answer : Answer: Option D
Description : What are the major effects of alloying elements?
Last Answer : To alter the transformation temperatures and times To modify the room temperature and elevated temperature strengths of given structures by (a) stiffening the crystals and (B) introducing complex ... oxide film formed on the surface of the steel and thereby affect its corrosion resistance.
Description : Stainless steel is usually made by alloying the steel with – (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper
Last Answer : (3) chromium and nickel Explanation: In metallurgy, stainless steel is defined as a steel alloy with a minimum of 10.5 per cent to 11 per cent chromium content by mass. There are ... virtually nonmagnetic and less brittle at low temperatures. For greater hardness and strength, more carbon is added.
Description : How with alloying of steel it is possible to a achieve properties which can not be achieved with heat treatment ?
Last Answer : A prerequisite to the hardening of steels is that martensite should be formed on cooling, but this can only be achieved if the rate of cooling is great enough to suppress the formation of pearlite or bainite and in plain carbon steels this can be achieved by quenching relatively small specimens
Description : Explain the effects of alloying chromium and nickel in stainless steel.
Last Answer : Addition of nickel and chromium increases the tensile strength and increase in resistance to corrosion takes place.
Description : Explain The Effects Of Alloying Chromium And Nickel In Stainless Steel.?
Last Answer : The addition of nickel and chromium increases the tensile strength and increase in resistance to corrosion takes place.
Description : Stainless steel is usually made by alloying the steel with (1) copper and nickel (2) copper and chromium (3) chromium and nickel (4) manganese and copper
Last Answer : chromium and nickel
Description : What is the effect of alloying element Cr & V on the properties of steel?
Last Answer : Effect of alloying element Cr:- i) It increases hardness, toughness and tensile strength. ii) It increases wear resistance and resistance to corrosion. Effect of alloying element V: ... tensile strength, ductility and shock resistance. ii) It increases air hardening and cutting quality.
Description : Maximum carbon content in any variety of steel can be upto 1.3%. Steel containing 0.4% Carbon is not used for making (A) Nuts (B) Bolts (C) Chisels
Last Answer : (C) Chisels
Description : Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent in steel. (A) 0.01 to 0.10 (B) 0.2 to 0.4 (C) 0.5 to 0.7 (D) 0.8 to 1.0
Last Answer : (B) 0.2 to 0.4
Description : Maximum consumption of zinc is in (A) Alloying (B) Galvanising (C) Utensil manufacture (D) Electrical industr
Last Answer : (B) Galvanising
Description : Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the (A) Physical nature, ash content and fineness of the coal (B) Amount of excess air supplied and load on the boiler (C) Type of burner and combustion chamber (D) All (A), (B) and (C)
Description : The optimum percentage of excess air for combustion depends upon the__________ of the fuel. (A) Type (solid, liquid or gaseous) (B) Calorific value (C) Sulphur content (D) Ignition temperature
Last Answer : (A) Type (solid, liquid or gaseous)
Description : Eutectoid composition of carbon steel at room temperature is (A) Cementite (B) Pearlite (C) Martensite (D) Ferrite
Description : Which of the following factors affect the mechanical properties of a material under applied loads? a) Content of alloys b) Grain size c) Imperfection and defects d) Shape of material
Last Answer : d) Shape of material
Description : Powdery materials can be guarded against caking tendency on storage by (A) Providing irregular grain size (B) Providing minimum percentage of voids (C) Having maximum possible points of contact (D) None of these
Last Answer : (D) None of these