Description : Annealing of white cast iron produces __________ iron. (A) Grey (B) Nodular (C) Malleable (D) Spheroidal
Last Answer : (C) Malleable
Description : Which one has the maximum tensile strength out of the following? (A) Nodular cast iron (B) Pig iron (C) White cast iron (D) Grey cast iron
Last Answer : (A) Nodular cast iron
Description : Carbon is present in the form of __________ in grey cast iron. (A) Spheroids (B) Nodular aggregates of graphite (C) Flakes
Last Answer : Option C
Description : Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron. (A) Manganese (B) Phosphorous (C) Magnesium (D) Chromium
Description : Cast iron is a __________ material. (A) Brittle (B) Ductile (C) Tough (D) Malleable
Last Answer : (A) Brittle
Description : Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is (A) Malleable iron (B) Grey cast iron (C) Chilled cast iron (D) White cast iron
Last Answer : Option A
Description : Steel produced from phosphatic iron is __________ in nature. (A) Malleable (B) Ductile (C) Brittle (D) Tough
Last Answer : (C) Brittle
Description : __________ iron is produced, when molten pig iron is chilled suddenly. (A) White cast (B) Grey cast (C) Wrought (D) None of these
Last Answer : (A) White cast
Description : __________ iron is produced, when molten pig iron is allowed to cool gradually. (A) White cast (B) Grey cast (C) Wrought (D) None of these
Last Answer : (B) Grey cast
Description : Wrought iron is (A) High carbon iron (B) Highly resistance to acid corrosion (C) Malleable & ductile; and hence is used for chain links, hooks & couplings (D) An alloy of iron, chromium & carbon
Last Answer : (C) Malleable & ductile; and hence is used for chain links, hooks & couplings
Description : Increasing sulphur content in pig iron tends to make it (A) Soft (B) Hard (C) Tough (D) Ductile & malleable
Last Answer : Option B
Description : White cast iron is not (A) Malleable (B) Whitish in color (C) Brittle (D) Strong and hard
Last Answer : (A) Malleable
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 : The most malleable, ductile low resistivity material is (A) Copper. (B) Aluminium. (C) Silver. (D) Iron.
Last Answer : (C) Silver.
Description : __________ of grey cast iron produces white cast iron. (A) Tempering (B) Rapid heating (C) Rapid cooling (D) Slow cooling
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
Description : Pick out the wrong statement. (A) Metal/alloys having hexagonal crystal lattice structure are less malleable than those having cubic crystal lattice structure (B) Metal/alloys having body centred cubic ... D) Both ferritic & austenitic stainless steel has a face centred cubic (fcc) crystal structure
Last Answer : (C) Tungsten has a body centred cubic (bcc) crystal lattice structure
Description : Ball bearings are generally made of (A) Plain carbon steel (B) Chrome carbon steel (C) Stainless steel (D) Malleable cast iron
Last Answer : (B) Chrome carbon steel
Description : The most distinguished property of malleable cast iron is its high (A) Ductility (B) Hardness (C) Malleability (D) None of these
Last Answer : (A) Ductility
Description : White cast iron as compared to grey cast iron is (A) More durable (B) Very brittle (C) Very hard (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Annealing of cast iron (A) Softens it to facilitate machining (B) Decreases the free carbon (C) Increases the strength (D) None of these
Description : What type of solid is ductile and malleable?
Last Answer : Several metals are ductile and malleable.
Description : Which of the following statements about the physical properties of metal is not correct? (a) All metals are solid except mercury (b) Most metals are hard except sodium and potassium (c) Metals are not malleable (d) Most metals are ductile
Last Answer : Ans:(c)
Description : (3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word ... conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.
Last Answer : Cloud is a colloidal dispersion of – (1) Air in a dispersion medium of water (2) Fog in a dispersion medium of water (3) Mist in a dispersion medium of air (4) Water drops in a dispersion medium of air
Description : If a metal can be drawn into wires relatively easily it is called: (1) malleable (2) ductile (3) extractive (4) tactile
Last Answer : (2) ductile Explanation: Ductility is a physical property of a material associated with the ability to be hammered thin or stretched into wire without breaking.
Description : If a metal can be drawn into wires relatively easily it is called: w) malleable x) ductile y) extractive z) tactile
Last Answer : ANSWER: X -- DUCTILE
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 : The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to (A) Grey cast iron (B) White cast iron (C) Mottled cast iron (D) Toughed cast iron
Last Answer : Answer: Option C
Description : Pick out the wrong statement. (A) Wrought iron contains about 0.02% carbon (B) Wrought iron cannot be easily forged and welded (C) The chilled cast iron does not contain graphite (D) Spheroidal grey cast iron contains graphite flakes
Last Answer : (B) Wrought iron cannot be easily forged and welded
Description : Oxyacetylene reducing flame is used while carrying out welding on (A) Alloy steel (B) Grey cast iron (C) Mild steel (D) High carbon steel
Last Answer : (C) Mild steel
Description : If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig
Description : Which material is suitable for shaft material? a. High speed steel b. Stainless steel or high carbon steel c. Grey cast iron d. Steel having approx. 0.4% carbon and 0.8% manganese
Last Answer : d. Steel having approx. 0.4% carbon and 0.8% manganese
Description : ______is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ? (a) Grey cast-iron (b) Cast steel (c) High carbon steel (d) Stainless steel
Last Answer : (b) Cast steel
Description : Cast iron and steel pipes are produced by __________ casting. (A) Die (B) Investment (C) Slush (D) True centrifugal
Last Answer : (D) True centrifugal
Description : Out of the following __________ iron has the best capability to bear sudden & excessive shocks. (A) White (B) Cast (C) Wrought (D) Pig
Last Answer : (C) Wrought
Description : The presence of impurities in iron (A) Increases its melting point (B) Does not affect its melting point (C) Decreases its melting point (D) Makes it malleable
Last Answer : (C) Decreases its melting point
Description : Very high sulphur in pig iron makes (A) Its casting unsound (B) Its hard and machinable (C) Its brittle and malleable (D) All (A), (B) & (C)
Last Answer : (A) Its casting unsound
Description : Out of the following, the most malleable material is (A) Copper (B) Aluminium (C) Wrought iron (D) Lead
Last Answer : (D) Lead
Description : The heat treatment process to which castings and the steel balls produced by cold heading are subjected is (A) Tempering (B) Normalising (C) Annealing (D) None of these
Last Answer : (B) Normalising
Description : For preparation of porous bearings by powder metallurgy, preferred particle shape is (A) Spherical (B) Nodular (C) Irregular (D) No preferred shape
Last Answer : (A) Spherical
Description : Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of (A) Rubber lined mild steel (B) Lead lined mild steel (C) Aluminium (D) Cast iron
Last Answer : (A) Rubber lined mild steel
Description : Semi steel' is (A) Produced by adding 10-20% steel to the cupola charge (B) Stronger than cast iron (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : __________ paint has the maximum absorption coefficient. (A) Black (B) Yellow (C) White (D) Grey
Last Answer : (A) Black
Description : __________ paint has the minimum absorption co-efficient. (A) Black (B) White lead (C) Grey (D) Light cream
Last Answer : (B) White lead
Description : Stefan-Boltzmann law applies to __________ body. (A) Black (B) White (C) Grey (D) Any colour
Description : Statement -1Wrought iron in more malleable and ducitlle than steel. Statement -2: It contains slightly less percentage of carbon.
Last Answer : Statement -1Wrought iron in more malleable and ducitlle than steel. Statement -2: It contains slightly less percentage of carbon.
Description : The most malleable metal is (a) Platinum (b) Silver (c) Iron (d) Gold
Last Answer : Ans:(d)
Description : The most malleable metal is - (1) platinum (2) silver (3) gold (4) iron
Last Answer : (3) gold Explanation: Gold is the most malleable of all metals; a single gram can be beaten into a sheet of 1 square meter, and an ounce into 300 square feet.