Description : __________ iron is produced by the annealing of white cast iron. (A) Malleable (B) Nodular (C) Ductile (D) Grey
Last Answer : (A) Malleable
Description : Annealing of white cast iron produces __________ iron. (A) Grey (B) Nodular (C) Malleable (D) Spheroidal
Last Answer : (C) Malleable
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 : __________ 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 : The graphite in grey irons exists in the form of flakes which act as stress-raisers under tensile loading and consequently grey irons have relatively low tensile strength and ductility. Still grey iron is extensively used in engineering. Why ?
Last Answer : (a) Cheapness. (B) Low melting point and high fluidity making it suitable for castings of intricate shape. (c) Relatively good erosion and corrosion resistance. (d) High damping capacity, with respect to vibration. (e) Relatively good mechanical properties under compressive loading.
Description : Pig iron obtained from the furnace which is properly provided with fuel at a very high temperature, is called (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig
Last Answer : Answer: Option B
Description : For light and ornamental casting, the most unsuitable pig iron, is (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig
Last Answer : Answer: Option D
Description : The variety of pig iron used for the manufacture of steel by Bessemer process, is (A) Bessemer pig (B) Grey pig (C) White forge pig (D) Mottled pig
Last Answer : Answer: Option A
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
Last Answer : Answer: Option C
Description : The variety of pig iron used for manufacture of wrought iron, is (A) Bessemer pig (B) Grey or foundry pig (C) White forge pig (D) Mottled pig
Description : Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig
Description : Cast iron has (A) Very high tensile strength (B) High ductility (C) High malleability (D) Elastic limit close to ultimate breaking strength
Last Answer : (D) Elastic limit close to ultimate breaking strength
Description : Presence of high phosphorous in cast iron increases its (A) Fluidity (B) Melting point (C) Shrinkage (D) Tensile strength
Last Answer : (A) Fluidity
Description : Cast iron has (A) High ductility (B) High malleability (C) Very high tensile strength (D) Its elastic limit very close to ultimate breaking strength
Last Answer : (D) Its elastic limit very close to ultimate breaking strength
Description : Which of the following has the least value of ultimate tensile strength (UTS)? (A) Medium carbon steel (B) High carbon steel (C) Cast iron (D) Wrought iron Answer: Option C
Last Answer : (C) Cast iron
Description : Cast iron is having very high (A) Proximity between its elastic limit and ultimate breaking strength (B) Ductility (C) Tensile strength (D) All (A), (B) and (C)
Last Answer : (A) Proximity between its elastic limit and ultimate breaking strength
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 : Which of the following has the least value of ultimate tensile strength (UTS)? (A) Medium carbon steel (B) High carbon steel (C) Cast iron (D) Wrought iron
Last Answer : Option B
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 : 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 : White cast iron as compared to grey cast iron is (A) More durable (B) Very brittle (C) Very hard (D) All (A), (B) & (C)
Description : __________ of grey cast iron produces white cast iron. (A) Tempering (B) Rapid heating (C) Rapid cooling (D) Slow cooling
Description : Which of the following is (are) true? (A) Cast iron has poor tensile strength compared to steel (B) Failure of cast iron flywheel is sudden and total (C) Machinability of cast iron flywheel is poor compared to steel flywheel (D) All of the above
Last Answer : (D) All of the above
Description : Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength The correct answer is (A) (i) and (ii) (B) (ii) and (iii) (C) (iii) and (iv) (D) (i) and (iv)
Description : Which is the purest form of iron? (A) Wrought iron (B) Pig iron (C) Bessemer iron (D) Grey iron
Last Answer : (A) Wrought iron
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
Description : A cast iron T section beam is subjected to pure bending. For maximum compressive stress to be three times the maximum tensile stress, centre of gravity of the section from flange side is (A) h/4 (B) h/3 (C) h/2 (D) 2/3 h
Last Answer : (A) h/4
Description : The product out from a cupola is called (A) Wrought iron (B) Pig iron (C) Cast iron (D) None of these
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 : Which one contains the least percentage of carbon? (A) Wrought iron (B) High speed steel (C) Cast iron (D) Pig iron
Description : Carbon percentage is the same in cast iron and (A) Wrought iron (B) Pig iron (C) Mild steel (D) High silicon (14%) iron
Last Answer : (B) Pig iron
Description : Which one is remelted and poured into moulds to get cast iron? (A) Wrought iron (B) Pig iron (C) Low carbon steel (D) Mild steel
Description : The material of construction of bearings is (A) Cast iron (B) Babbitt metal (C) Pig iron (D) Steel
Last Answer : (B) Babbitt metal
Description : __________ iron is the purest form of iron. (A) Cast (B) Wrought (C) Pig (D) High silicon
Last Answer : (B) Wrought
Description : Cupola produces __________ iron. (A) Pig (B) Cast (C) Wrought (D) Carbon free
Last Answer : (B) Cast
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 : 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 : Distortion or change in shape of a cast partial denture clasp during its clinical use probably indicates that the: A. Ductility was too low B. Hardness was too great C. Ultimate tensile strength was too low D. Tension temperature was too high E. Elastic limit was exceeded
Last Answer : E. Elastic limit was exceeded
Description : Which property is not required for shaft materials? a. High shear and tensile strength b. Good mach inability c. High fatigue strength d. Good cast ability
Last Answer : d. Good cast ability
Description : Statement-1:Cast iron is different from pig iron. Statement-2: Cast iron is made by melting pig iron with scrap iron and coke using hot air blast and
Last Answer : Statement-1:Cast iron is different from pig iron. Statement-2: Cast iron is made by melting pig ... Statement-1 is false but Statement -2 is true
Description : The purest form of Iron is : (1) Cast iron (2) Steel (3) Pig iron (4) Wrought iron
Last Answer : (4) Wrought iron Explanation: Wrought iron is an iron alloy with a very low carbon content in Contrast to steel, and has fibrous inclusions, known as slag. This is what gives it a " ... qualifies because current standards for commercially pure iron require a carbon content of less than 0.008 wt%.
Description : Which is the purest form of iron? (1) Steel (2) Cast iron (3) Pig iron (4) Wrought iron
Last Answer : (4) Wrought iron Explanation: Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series. It is the most common element (by mass) forming the ... the Earth's crust. Wrought iron is the purest form of iron. It contains less than 0.25% carbon.
Description : Bessemer process is used for the manufacture of (A) Pig iron (B) Cast iron (C) Wrought iron D) Steel
Description : Cast iron (A) Is obtained by purifying pig iron (B) Is manufactured in required shapes (C) May contain 2 to 5 per cent of carbon with other impurities (D) All the above
Last Answer : Wrought iron
Description : Which is the purest form of iron ? (1) Steel (2) Cast iron (3) Pig iron (4) Wrought iron