Description : Carbon percentage in medium carbon steel is around (A) 0.1 to 0.35 (B) 0.35 to 0.5 (C) 0.8 to 1.4 (D) 1 to 1. 5
Last Answer : (B) 0.35 to 0.5
Description : High speed cutting tool steels contain about __________ percent of tungsten. (A) 6-8 (B) 18-20 (C) 30-35 (D) 50-55
Last Answer : (B) 18-20
Description : Generally __________ are subjected to galvanising (i.e., zinc coating). (A) Non-ferrous metals (B) Non-metals (C) Low carbon steels (D) Stainless steel
Last Answer : (C) Low carbon steels
Description : Presence of SO2 in furnace gases attacks the ferrous metal by way of (A) Accelerating the rate of scaling (B) Causing metal embrittlement (C) Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Weld decay occurs in which of the following steel types? a) Carbon/Manganese b) Low alloy c) Any stainless steel d) Austenitic stainless steels
Last Answer : d) Austenitic stainless steels
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 : 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 : 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 : The percentage of carbon in mild steel is (A) 0.08 to 0.3 % (B) 0.5 to 1.4 % (D) 2.35 % (D) 0.5 %
Last Answer : (A) 0.08 to 0.3 %
Description : List two effects of manganese in plain carbon steels.
Last Answer : Manganese increases tensile strength and hardness. It decreases weldability.
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 : Percentage of carbon monoxide in blast furnace gas may be around (A) 8 (B) 14 (C) 22 (D) 52
Last Answer : (C) 22
Description : Manganese steels (A) Are non-magnetic (B) Possess high electrical resistance (C) Possess low coefficient of expansion (D) All the above
Last Answer : Answer: Option D
Description : Specialty low-alloy steel DMR-1700 a cost-effective replacement of mar- aging steels is product of (a) DLRL (b) DEAL (c) DMRL (d) DEBEL
Last Answer : (c) DMRL
Description : Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si) (A) Do not require heat treatment for any of its applications (B) Are used for leaf and coiled springs (C) Do not have good resilience properties (D) Is tempered at 850°C
Last Answer : (B) Are used for leaf and coiled springs
Description : Molybdenum steels containing 0.15 to 0.40% molybdenum (A) Are prone to temper brittleness (B) Are used for automobile parts like gears, axle, shaft, bearings etc. (C) Have very poor fatigue resistance
Last Answer : (B) Are used for automobile parts like gears, axle, shaft, bearings etc
Description : Percentage of glycerine present in the spent lye obtained during soap manufacture is about (A) 0.5 (B) 5 (C) 20 (D) 35
Last Answer : (B) 5
Description : Percentage of the heavy water in ordinary water is around (A) 0.015 (B) 7.54 (C) 0.71 (D) 32.97
Last Answer : (A) 0.015
Description : Percentage of heavy water in ordinary water is around (A) 0.015 (B) 7.54 (C) 0.71 (D) 32.97
Description : Which of the following stainless steels is non-magnetic? (A) Ferritic (B) Martenistic (C) Austenitic
Last Answer : (C) Austenitic
Description : Which of the following alloy steels is the most suitable for making gun barrels and projectiles? (A) Tungsten steel (B) Molybdenum steel (C) Nickel-chrome steel (D) Cobalt steel
Last Answer : (C) Nickel-chrome steel
Description : Which of the following stainless steels is non-magnetic? (A) Ferritic (B) Martenistic (C) Austenitic (D) None of these
Description : Shock resisting steels should possess high (A) Hardness (B) Toughness (C) Tensile strength (D) Wear resistance
Last Answer : (B) Toughness
Description : __________ is used for determining the tensile strength of steels. (A) Hydraulic press (B) Universal testing machine (C) Mechanical press (D) None of these
Last Answer : (B) Universal testing machine
Description : Which of the following has a very high carbide forming tendency in steels? (A) Silicon (B) Chromium (C) Nickel (D) Vanadium
Last Answer : (D) Vanadium
Description : Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines? (A) Silicon steel (B) Chromium steel (C) Molybdenum steel (D) None of these
Last Answer : (A) Silicon steel
Description : Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress. (A) Ultimate (B) Yield point (C) Proof (D) None of these
Last Answer : (C) Proof
Description : Ferric stainless steels compared to austenitic stainless steels (A) Have lower corrosion resistance (B) Are harder to fabricate (C) Are less ductile and hence less suitable for cold pressing (D) All (A), (B) and (C)
Description : Identify the false statement (A) Martensitic steels are less susceptible to pitting corrosion than austenitic steels (B) Pitting corrosion is usually very localised (C) Hydrogen embrittlement is facilitated by tensile stress (D) Stress corrosion cracking is facilitated by tensile stress
Last Answer : (A) Martensitic steels are less susceptible to pitting corrosion than austenitic steels
Description : Earing is a defect found in steels after the following metal working operation. (A) Extrusion (B) Rolling (C) Deep drawing (D) Wire drawing
Last Answer : (C) Deep drawing
Description : Fine grained steels have (A) High brittleness (B) Higher tendency to distort (C) High ductility (D) None of these
Last Answer : (C) High ductility
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 : Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called (A) Tempering (B) Hardening (C) Annealing (D) Normalising
Last Answer : Option C
Description : Machinability of hard alloys and tool steels is improved by (A) Spheroidising (B) Annealing (C) Tempering (D) Normalising
Last Answer : Option B
Description : Hydrogen in liquid steels is dissolved (A) As tiny gas bubbles (B) In the atomic form (C) In the ionic form (D) In the molecular form
Last Answer : Option A
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
Description : Maraging steels derive their strength from the following mechanism: (A) A fine, highly dislocated and strong martensite (B) Fine dispersions of inter-metallic of Fe, Ni, Ti etc (C) Fine ... alloy carbides in a ferrite matrix (D) Fine dispersions of Fe3 C nucleated on dislocations in austenite
Description : What force is necessary to hold a weight of 100 kg suspended on a rope wrapped 3 times around a post ( a.0.35 b.0.8 c.1.46 d.2.85 e.107 dynes
Last Answer : a. 0.35
Description : . Thermal efficiency of an internal combustion engine is around __________ percent. (A) 8 (B) 35 (C) 65 (D) 80
Description : Thermal efficiency of an internal combustion engine is around __________ percent. (A) 8 (B) 35 (C) 65
Description : Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent. (A) 0.02 (B) 0.2 (C) 0.35 (D) 0.5
Last Answer : (B) 0.2
Description : The percentage of carbon in low carbon steel is A. 0.05% B. 0.15% C. 0.3% D. 0.5%
Last Answer : B. 0.15%
Description : Which of the following has the least carbon percentage? (A) Low carbon steel (B) Mild steel (C) Wrought iron (D) White cast iron
Last Answer : (C) Wrought iron
Description : In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less. (A) Difference in gross & net calorific value of the coke oven gas (B) Free carbon content in tar (C) Yield percentage of coke (D) Yield of ammonia present in coke oven gas
Last Answer : (A) Difference in gross & net calorific value of the coke oven gas
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 : Minimum percentage of tension steel for a singly reinforced section Fe415 grade is [ A ] 0.2 [ B ] 0.35 [ C ] 2 [ D ] 3.5
Last Answer : [ A ] 0.2
Description : For determining the compressive strength test on cement is, the percentage amount of water to be added as (Pa = Percentage of water for required consistency) [ A ] 0.25 Pa + 2.5 [ B ] 0.25 Pa + 3.5 [ C ] 0.35 Pa + 2.5 [ D ] 0.35 Pa + 3.5
Last Answer : [ B ] 0.25 Pa + 3.5
Description : Percentage of carbon content in mild steel is (A) Less than 0.25 (B) Between 0.25 and 0.7 (C) Between 0.7 and 1.5 (D) Greater than 1.5
Last Answer : Answer: Option A