131 + Interview Questions in Foundry Introduction & Materials in Casting-Forming-Welding Ii Page 3 InterviewSolution

101.	Which of the following materials cannot be used for making a core box?(a) Aluminium(b) Steel(c) Zinc(d) Cast ironThe question was asked by my school principal while I was bunking the class.I would like to ask this question from Cast Irons in chapter Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» CORRECT OPTION is (C) Zinc The EXPLANATION is: NONE.

Discussion

102.	Cast iron generally has low tensile strength but excellent compressive strength.(a) True(b) FalseThis question was posed to me at a job interview.My question is from Cast Irons topic in division Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Correct choice is (a) True The best explanation: Cast iron is normally of nonmalleable and brittle nature which defines that, it is not easy to bend or stretched the casting into any shape due to low tensile strength. Cast iron parts TEND to fracture by little of deformation, but cast iron has excellent COMPRESSIVE strength which highly REQUIRED in MAKING of structures of buildings and bridges.

Discussion

103.	What is the temperature in a core box typically?(a) 120°C – 160°C(b) 180°C – 260°C(c) 200°C – 270°C(d) 290°C – 350°CI had been asked this question in class test.Asked question is from Cast Irons topic in portion Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The CORRECT OPTION is (B) 180°C – 260°C Easiest EXPLANATION: NONE.

Discussion

104.	The shaking out of cast iron casting from mould cavity is known as fettling process.(a) True(b) FalseI had been asked this question in a national level competition.I would like to ask this question from Cast Irons in portion Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The correct choice is (b) False To elaborate: The cast iron is first melted in furnace and then poured into the mould cavity. After cooling of cast iron in the mould it is broken out. All the excess of metal from the PROCESS, gates, runners ETC are removed in a process called as fettling, which also have operations LIKE grinding and shot blasting to produce the good surface finish of the CASTINGS.

Discussion

105.	Up to what thickness can hot box process can be used for production?(a) 10 mm- 40 mm(b) 30 mm- 50 mm(c) 40 mm- 80 mm(d) 70 mm- 100 mmThe question was posed to me in a national level competition.The origin of the question is Cast Irons in chapter Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The CORRECT option is (d) 70 mm- 100 mm The explanation is: In hot BOX PROCESS, there is a core box employed, wherein the sand MIXTURES are poured along with the liquid resins, which act as binders. The thickness up to which hot box process can be USED is 70 mm to 100 mm.

Discussion

106.	Shell molding process is a costly process for gray iron castings.(a) True(b) FalseThis question was posed to me by my school teacher while I was bunking the class.This intriguing question comes from Cast Irons in portion Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The correct option is (b) False The explanation: When gray CAST IRONS have to be processed, there is some amount of machining required to it, which DEMAND high costs. But, if gray cast irons have to be shell MOLDED, the overall cost of the product goes down, making it an ECONOMICAL process.

Discussion

107.	Green sand molding provides the best surface finish.(a) True(b) FalseThis question was posed to me during an interview.Asked question is from Cast Irons in division Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Correct answer is (b) False For explanation: Green SAND moldings are found to provide good AMOUNT of SURFACE finish, but an even better quality of surface finish and accuracy of dimensions is offered by shell molding process.

Discussion

108.	Up to what mass of gray cast irons can shell molds take?(a) 300 kg(b) 400 kg(c) 500 kg(d) 600 kgThe question was asked during an online exam.This interesting question is from Cast Irons topic in section Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The CORRECT option is (C) 500 kg For explanation: Shell molding is one of the most important PROCESSES which has also been employed for the production of gray cast irons. Gray cast irons WEIGHING up to around 500 kg are USUALLY processed by this method.

Discussion

109.	What is the tensile strength of thick gray cast iron?(a) 276 MPa(b) 283 MPa(c) 295 MPa(d) 207 MPaI had been asked this question by my college director while I was bunking the class.Asked question is from Cast Irons topic in chapter Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Right answer is (a) 276 MPa Best explanation: TENSILE STRENGTH of thick gray CAST iron is 276 MPa.

Discussion

110.	What would be the tensile strength of gray cast iron of class 20?(a) 120 MPa(b) 163 MPa(c) 138 MPa(d) 152 MPaThe question was posed to me in a job interview.The origin of the question is Cast Irons in portion Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Correct option is (c) 138 MPa The best I can EXPLAIN: Tensile strength of gray CAST iron of class 20 is 163 MPa.

Discussion

111.	Presence of which material in a gray cast iron causes reduced ductility?(a) Graphite(b) Aluminium(c) Coke(d) ZincThe question was asked by my school principal while I was bunking the class.This question is from Cast Irons topic in division Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The correct answer is (a) Graphite Explanation: Among all the types of cast irons that are manufactured, gray cast irons are most WIDELY used. The COLOUR of this ALLOY is dull gray. Gray cast iron CONTAINS graphite flakes, which are responsible for the reduced ductility and STRENGTH.

Discussion

112.	Chromium is added to stainless steel.(a) True(b) FalseThe question was posed to me in examination.This interesting question is from Classification of Foundry Metals and Alloys in portion Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Right ANSWER is (a) True Easiest explanation: Stainless STEELS are of three types, MARTENSITIC, ferritic and austenitic. Stainless steels are resistive to corrosion. These stainless steels contain chromium or nickel apart from its regular ADDITIVES.

Discussion

113.	What is the amount of manganese present in cast carbon steels?(a) 0.5% – 1.0%(b) 0.25% – 0.5%(c) 0.45% – 0.8%(d) 1% – 2%I had been asked this question in an internship interview.This key question is from Classification of Foundry Metals and Alloys topic in portion Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» RIGHT answer is (a) 0.5% – 1.0% EASIEST explanation: 0.5% – 1.0% amount of manganese PRESENT in CAST carbon steels.

Discussion

114.	What is the amount of silicon present in cast carbon steels?(a) 0.25% – 0.6%(b) 0.25% – 0.8%(c) 0.45% – 0.9%(d) 0.45% – 0.1%I had been asked this question in semester exam.This intriguing question originated from Classification of Foundry Metals and Alloys in section Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The correct choice is (B) 0.25% – 0.8% To explain I WOULD say: The amount of silicon that is present in TERMS of percentage composition is FOUND to be 0.25% to 0.8%. Elements like silicon and manganese are added in the steel alloys for the PURPOSE of deoxidation.

Discussion

115.	Which of the following is a light metal?(a) Copper base(b) Lead base(c) Nickel base(d) Magnesium baseI had been asked this question in class test.My query is from Classification of Foundry Metals and Alloys topic in section Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Correct choice is (d) MAGNESIUM base Explanation: Magnesium base is a LIGHT METAL.

Discussion

116.	What is the amount of carbon present in high carbon steel?(a) More than 0.5%(b) More than 0.7%(c) More than 0.4%(d) More than 0.2%This question was addressed to me in exam.My doubt is from Classification of Foundry Metals and Alloys in portion Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Right option is (a) More than 0.5% BEST explanation: More than 0.5% amount of CARBON present in high carbon steel.

Discussion

117.	Which among the following is a heavy metal?(a) Titanium base(b) Aluminium base(c) Zinc base(d) Magnesium baseI had been asked this question during an online interview.I need to ask this question from Classification of Foundry Metals and Alloys in chapter Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The CORRECT answer is (c) Zinc base Best explanation: The given METAL bases are all non-ferrous metal bases, which are classified under foundry METALS and alloys. Among these, the only heavy metal is the zinc base, while all OTHERS are LIGHT metals.

Discussion

118.	What is the amount of carbon present in low carbon steel?(a) Less than 0.5%(b) Less than 0.7%(c) Less than 0.4%(d) Less than 0.2%The question was asked at a job interview.My doubt is from Classification of Foundry Metals and Alloys in portion Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The correct choice is (d) Less than 0.2% Best explanation: Low carbon steel has the LOWEST AMOUNT of carbon mixed with IRON in the ALLOY. The amount of carbon present in low carbon steel is less than 0.2% and that of medium carbon steel has carbon COMPOSITION of about 0.2% to 0.5%.

Discussion

119.	Which among the following is not a cast iron?(a) White iron(b) Compacted graphite iron(c) Gray cast iron(d) Pig ironI had been asked this question in an international level competition.The above asked question is from Classification of Foundry Metals and Alloys in section Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Right option is (d) Pig IRON The best EXPLANATION: Among the FOLLOWING, white iron, COMPACTED cast iron and gray cast iron are different types of cast IRONS, but pig iron is not. It is from pig iron, that cast irons are made, by re-melting them.

Discussion

120.	Which of the following forms of iron is least malleable?(a) Austenitic(b) Pearlitic(c) Ferritic(d) MartensiticI got this question in exam.My question is taken from Classification of Foundry Metals and Alloys in chapter Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Right answer is (a) Austenitic The BEST explanation: Malleable irons are cast irons which are classified under iron base MATERIALS, under FOUNDRY metals and ALLOYS. Among these phases of iron, the austenite phase of iron is MEASURED to be showing the least amount of malleability.

Discussion

121.	Which of the following is not a cast steel?(a) Low alloy steel(b) Magnesium alloy steel(c) Carbon steel(d) High alloy steelThis question was addressed to me in homework.The above asked question is from Classification of Foundry Metals and Alloys in division Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Right option is (b) Magnesium alloy steel The best I can explain: Cast steel are a further classification of FOUNDRY metals and alloys under FERROUS metals and alloys, that is, having IRON base. Low alloy steel, high alloy steel and carbon steel are cast steels, but not magnesium alloy.

Discussion

122.	Which of the following is not a surface finishing process?(a) Honing(b) Grinding(c) Boring(d) LappingThe question was asked by my college director while I was bunking the class.I want to ask this question from Introduction of Foundry industry topic in portion Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Right answer is (C) Boring The explanation: Honing, grinding, anodizing, lapping, polishing and metal spraying are a few of the SURFACE finishing techniques. But, boring is not ONE of them, it is a technique that is used for metal removal process.

Discussion

123.	Products made through casting can avoid joining process.(a) True(b) FalseThe question was posed to me in my homework.Question is from Introduction of Foundry industry topic in chapter Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The correct answer is (a) True Explanation: Products which are made from CASTING PROCESSES, possess an ADVANTAGE of being formed into one SINGLE PIECE. When the production is done in one piece, it eliminates the requirement of any joining process.

Discussion

124.	Which of the following is a metal shaping process?(a) Press forging(b) Broaching(c) Riveting(d) LappingI got this question in exam.My question is from Introduction of Foundry industry topic in division Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Correct choice is (a) Press forging To explain I would say: Among the FOLLOWING, broaching is a metal MACHINING process or a metal REMOVAL process, riveting is a metal joining process, lapping is a SURFACE FINISHING process and press forging is a shaping process.

Discussion

125.	Casting provides uniform directional properties.(a) True(b) FalseI have been asked this question in semester exam.I want to ask this question from Introduction of Foundry industry in division Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The CORRECT option is (a) True To elaborate: Casting provides a great amount of FREEDOM in terms of design. It helps in PROVIDING uniform DIRECTIONAL properties and good VIBRATIONAL properties.

Discussion

126.	Which of the following is not a metal removing process?(a) Grinding(b) Milling(c) Swaging(d) HobbingThis question was posed to me in an interview for internship.Question is taken from Introduction of Foundry industry topic in chapter Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Correct choice is (C) Swaging For explanation I would say: Grinding, milling, hobbing, PLANNING, reaming, shaping, boring, TURNING and broaching are a few of the techniques of metal REMOVING process. But, swaging is not a PART of them, it is a type of metal shaping process.

Discussion

127.	In an automobile engine, up to what percent of parts are manufactured by casting?(a) 65%(b) 75%(c) 80%(d) 90%The question was asked in an interview for job.The origin of the question is Introduction of Foundry industry topic in chapter Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» RIGHT answer is (d) 90% Best explanation: Casting is ONE of the most all ROUND process USED in manufacturing. Up to 90% of the automobile engine parts are MANUFACTURED using casting, and around 50% of the total weight of the tractor is manufactured using casting.

Discussion

128.	Which of the following is not a metal joining process?(a) Riveting(b) Bending(c) Pressing(d) BrazingThis question was addressed to me during an internship interview.I would like to ask this question from Introduction of Foundry industry topic in chapter Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Right option is (B) Bending The explanation is: Riveting, brazing, pressing, soldering, ADHESIVE bonding and bolt-screw FASTENING are few of the techniques of metal joining process. But, bending is not one of them, it is a SHAPING process.

Discussion

129.	Which of the following is a ferrous foundry?(a) Brass foundry(b) Bronze foundry(c) High alloy steel foundry(d) Zinc-base foundryThis question was posed to me in examination.This is a very interesting question from Introduction of Foundry industry in section Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Right ANSWER is (c) High alloy steel FOUNDRY The best I can explain: Among the following, a high alloy steel foundry is a type of steel foundry and steel foundries COME under FERROUS foundries, while the REMAINING ones are non-ferrous foundries.

Discussion

130.	What is the total capacity possessed by ferrous Indian foundries?(a) 1,00,000 tons(b) 1,50,000 tons(c) 2,00,000 tons(d) 2,50,000 tonsThis question was addressed to me during an online exam.My enquiry is from Introduction of Foundry industry in chapter Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The correct option is (d) 2,50,000 tons To ELABORATE: There are many foundries in India. A few BIG foundries are located in Durgapur, ASANSOL, Rourkela, Bhopal and BANGALORE. The total capacity possessed by Indian ferrous foundries is more than 2,50,000 tons.

Discussion

131.	Which of the following is not a type of a foundry?(a) Captive foundry(b) Jobbing foundry(c) Semi Production foundry(d) Auto production foundryThis question was posed to me during an interview.The above asked question is from Introduction of Foundry industry topic in portion Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» Right CHOICE is (d) Auto production foundry Easy EXPLANATION: FOUNDRIES are classified according to their type of WORK and the form of constitution and structure of their organization. The foundries are hence classified into four TYPES namely, captive foundry, jobbing foundry, semi production foundry and production foundry.

Discussion

Explore topic-wise InterviewSolutions in .

Cast iron generally has low tensile strength but excellent compressive strength.(a) True(b) FalseThis question was posed to me at a job interview.My question is from Cast Irons topic in division Foundry Introduction & Materials of Casting-Forming-Welding II

What is the temperature in a core box typically?(a) 120°C – 160°C(b) 180°C – 260°C(c) 200°C – 270°C(d) 290°C – 350°CI had been asked this question in class test.Asked question is from Cast Irons topic in portion Foundry Introduction & Materials of Casting-Forming-Welding II

The shaking out of cast iron casting from mould cavity is known as fettling process.(a) True(b) FalseI had been asked this question in a national level competition.I would like to ask this question from Cast Irons in portion Foundry Introduction & Materials of Casting-Forming-Welding II

Shell molding process is a costly process for gray iron castings.(a) True(b) FalseThis question was posed to me by my school teacher while I was bunking the class.This intriguing question comes from Cast Irons in portion Foundry Introduction & Materials of Casting-Forming-Welding II

Green sand molding provides the best surface finish.(a) True(b) FalseThis question was posed to me during an interview.Asked question is from Cast Irons in division Foundry Introduction & Materials of Casting-Forming-Welding II

Up to what mass of gray cast irons can shell molds take?(a) 300 kg(b) 400 kg(c) 500 kg(d) 600 kgThe question was asked during an online exam.This interesting question is from Cast Irons topic in section Foundry Introduction & Materials of Casting-Forming-Welding II

What is the tensile strength of thick gray cast iron?(a) 276 MPa(b) 283 MPa(c) 295 MPa(d) 207 MPaI had been asked this question by my college director while I was bunking the class.Asked question is from Cast Irons topic in chapter Foundry Introduction & Materials of Casting-Forming-Welding II

What would be the tensile strength of gray cast iron of class 20?(a) 120 MPa(b) 163 MPa(c) 138 MPa(d) 152 MPaThe question was posed to me in a job interview.The origin of the question is Cast Irons in portion Foundry Introduction & Materials of Casting-Forming-Welding II

Chromium is added to stainless steel.(a) True(b) FalseThe question was posed to me in examination.This interesting question is from Classification of Foundry Metals and Alloys in portion Foundry Introduction & Materials of Casting-Forming-Welding II

Which of the following is a light metal?(a) Copper base(b) Lead base(c) Nickel base(d) Magnesium baseI had been asked this question in class test.My query is from Classification of Foundry Metals and Alloys topic in section Foundry Introduction & Materials of Casting-Forming-Welding II

Which of the following forms of iron is least malleable?(a) Austenitic(b) Pearlitic(c) Ferritic(d) MartensiticI got this question in exam.My question is taken from Classification of Foundry Metals and Alloys in chapter Foundry Introduction & Materials of Casting-Forming-Welding II

Products made through casting can avoid joining process.(a) True(b) FalseThe question was posed to me in my homework.Question is from Introduction of Foundry industry topic in chapter Foundry Introduction & Materials of Casting-Forming-Welding II

Which of the following is a metal shaping process?(a) Press forging(b) Broaching(c) Riveting(d) LappingI got this question in exam.My question is from Introduction of Foundry industry topic in division Foundry Introduction & Materials of Casting-Forming-Welding II

Casting provides uniform directional properties.(a) True(b) FalseI have been asked this question in semester exam.I want to ask this question from Introduction of Foundry industry in division Foundry Introduction & Materials of Casting-Forming-Welding II

Which of the following is not a metal removing process?(a) Grinding(b) Milling(c) Swaging(d) HobbingThis question was posed to me in an interview for internship.Question is taken from Introduction of Foundry industry topic in chapter Foundry Introduction & Materials of Casting-Forming-Welding II

In an automobile engine, up to what percent of parts are manufactured by casting?(a) 65%(b) 75%(c) 80%(d) 90%The question was asked in an interview for job.The origin of the question is Introduction of Foundry industry topic in chapter Foundry Introduction & Materials of Casting-Forming-Welding II