20 + Interview Questions in Sand Preparation in Casting-Forming-Welding I Page 1 InterviewSolution

1.	Grain distribution is not determined by the Grain fineness test.(a) True(b) FalseI have been asked this question in final exam.My enquiry is from Testing of Molding Sand topic in division Sand Preparation of Casting-Forming-Welding I
Answer» Correct answer is (b) False The explanation is: For knowing the exact details of the compositions present in the sand, various TESTS have to be PERFORMED, one of them is grain FITNESS TEST. Grain fineness test determines the grain SIZE, grain distribution and grain fineness.

Discussion

2.	In clay content determination of molding sand, which is the base solution used?(a) KOH(b) NaOH(c) Mg(OH)2(d) Ca(OH)2I got this question in an interview for job.This intriguing question originated from Testing of Molding Sand topic in division Sand Preparation of Casting-Forming-Welding I
Answer» The correct choice is (B) NaOH For explanation: For KNOWING the exact details of the compositions present in the SAND, various tests have to be performed. In clay CONTENT determination of the molding sand, 3% sodium hydroxide (NaOH) is used.

Discussion

3.	In a moisture content test, how is the prepared sand heated?(a) Flame heating(b) Ultraviolet heating(c) Infrared heating(d) Conduction heatingThis question was addressed to me during an interview.My question is taken from Testing of Molding Sand in division Sand Preparation of Casting-Forming-Welding I
Answer» Right option is (c) INFRARED heating Best explanation: In a MOISTURE content test, the PREPARED sand is TAKEN in a pan, about 20 to 50 grams, and then heated using infrared heating.

Discussion

4.	What should be the accuracy of automatic moisture control for manufacturing sands?(a) ± 0.1%(b) ± 0.2%(c) ± 0.3%(d) ± 0.4%I got this question during an online interview.The query is from Molding Sand Preparation in division Sand Preparation of Casting-Forming-Welding I
Answer» The correct answer is (a) ± 0.1% To explain I would say: In any SYSTEM, the ACCURACY in its WORKING is considered to be one of the most essential FEATURES of that PROCESS. The accuracy of automatic moisture control for manufacturing sand must be ± 0.1%.

Discussion

5.	The pressure of which gas gives the reading of water content on the pressure gauge?(a) Methane(b) Acetone(c) Acetylene(d) Carbon dioxideThis question was posed to me during an online exam.Asked question is from Testing of Molding Sand in division Sand Preparation of Casting-Forming-Welding I
Answer» Correct CHOICE is (C) Acetylene For explanation I would say: Methane, carbon dioxide and ACETONE are not very useful when it comes to TAKE readings on the pressure gauge. Acetylene gas helps in getting a direct reading on the pressure gauge of the WATER content.

Discussion

6.	Which of the following process deals with preparation the mold sand?(a) Sand mixing(b) Sand preparation(c) Sand tempering(d) Sand conditioningThe question was posed to me during an interview for a job.Question is taken from Molding Sand Preparation topic in section Sand Preparation of Casting-Forming-Welding I
Answer» RIGHT option is (d) Sand CONDITIONING Easiest explanation: Among sand mixing, sand PREPARATION, sand TEMPERING and sand conditioning, the process that deals with preparation of the mold sand is sand conditioning.

Discussion

7.	How much time is taken by sand, for sand preparation in terms of muller time?(a) 33 to 50 percent of muller time(b) 14 to 29 percent of muller time(c) 25 to 40 percent of muller time(d) 46 to 62 percent of muller timeThe question was posed to me during an online exam.I want to ask this question from Molding Sand Preparation topic in chapter Sand Preparation of Casting-Forming-Welding I
Answer» Right CHOICE is (a) 33 to 50 percent of muller time The BEST I can explain: Muller time is the time needed for the HIGH SPEED muller to complete its FUNCTION. For sand preparation, approximately 33 to 50 percent of muller time is needed.

Discussion

8.	A low speed muller is used in mechanized foundries.(a) True(b) FalseI had been asked this question in an international level competition.I'm obligated to ask this question of Molding Sand Preparation topic in portion Sand Preparation of Casting-Forming-Welding I
Answer» Right CHOICE is (B) False The BEST explanation: In mechanized foundries, a high speed muller is essentially used which rotates in a horizontal DIRECTION.

Discussion

9.	High moisture causes what in molding sands?(a) Increase in permeability(b) Decrease in permeability(c) Increase in hardness(d) Increase in strengthThe question was posed to me during a job interview.The doubt is from Testing of Molding Sand topic in section Sand Preparation of Casting-Forming-Welding I
Answer» Correct ANSWER is (b) Decrease in permeability Easy explanation: Permeability is basically the magnitude of pores present in the sands and its CAPACITY of moisture it can HOLD. High moisture CONTENT causes a decrease in permeability of the sand and hence causes other problems in it.

Discussion

10.	In a moisture content test, what amount of prepared sand is placed on the pan?(a) 10-40 grams(b) 20-50 grams(c) 30-60 grams(d) 40-70 gramsThis question was posed to me in a job interview.Query is from Testing of Molding Sand topic in division Sand Preparation of Casting-Forming-Welding I
Answer» Right answer is (b) 20-50 GRAMS For EXPLANATION: When the tests for composition present in the pan are taken, sands are a very important factor in it. In a moisture CONTENT test, approximately 20 grams to 50 grams of prepared SAND is taken in the pan.

Discussion

11.	Permeability of molding sand does not depend on which of the following factors?(a) Grain distribution(b) Degree of ramming(c) Binder contents(d) Amount of wax presentThis question was posed to me in exam.My question is from Testing of Molding Sand in division Sand Preparation of Casting-Forming-Welding I
Answer» Right CHOICE is (d) Amount of wax present Explanation: PERMEABILITY of MOLDING sand allows the hot gases and steams to ESCAPE out. This property does not depend on the amount of wax present.

Discussion

12.	Calcium carbide reacts with moisture to give out which gas?(a) Acetylene gas(b) Methane(c) Carbon dioxide(d) Carbon monoxideThis question was posed to me in unit test.This question is from Testing of Molding Sand in portion Sand Preparation of Casting-Forming-Welding I
Answer» Right choice is (a) Acetylene gas Easy explanation: ACCORDING to the chemical reaction, Calcium carbide when REACTS with moisture, that is WATER, it is observed to GIVE out calcium hydroxide and acetylene gas.

Discussion

13.	Air blasts are provided for forced cooling of sand after muller operation.(a) True(b) FalseThis question was posed to me in an internship interview.Origin of the question is Molding Sand Preparation topic in section Sand Preparation of Casting-Forming-Welding I
Answer» Correct choice is (a) True Explanation: Mullers USUALLY need approximately 33 to 50 PERCENT of mulling TIME. In a high speed sand preparation UNIT, after the muller operation is complete, to COOL the sand, air blasts are used.

Discussion

14.	Which of the following process deals with the amount of moisture to be added?(a) Sand mixing(b) Sand preparation(c) Sand conditioning(d) Sand temperingThis question was addressed to me during an online exam.I want to ask this question from Molding Sand Preparation in section Sand Preparation of Casting-Forming-Welding I
Answer» Right choice is (d) SAND tempering Easiest explanation: Sand tempering is linked with sand preparation, WHEREIN the AMOUNT of moisture needed as an additive is ADDED.

Discussion

15.	What is the temperature requirement of sand, for manufacturing?(a) Below 40°C(b) Below 50°C(c) Below 60°C(d) Below 70°CThe question was asked during an online exam.I need to ask this question from Molding Sand Preparation in section Sand Preparation of Casting-Forming-Welding I
Answer» Correct answer is (a) Below 40°C For explanation I would say: AMONG the basic CONDITIONS of sand, temperature condition is considered an ESSENTIAL factor. The temperature REQUIREMENT of sand used for MANUFACTURING should be below 40°C.

Discussion

16.	How much distilled water is added to 3% NaOH solution in clay content determination of molding sand?(a) 450 cc(b) 475 cc(c) 500 cc(d) 550 ccThe question was asked in my homework.My query is from Testing of Molding Sand topic in portion Sand Preparation of Casting-Forming-Welding I
Answer» Right option is (B) 475 cc The EXPLANATION: A strong BASE is used in the clay content determination, like sodium HYDROXIDE. 475 cc of distilled water is added to 3% NaOH solution on the determination of clay content of MOLDING sands.

Discussion

17.	To avoid difficulties in making of molds, sand should be cooled below what temperature?(a) 100°F(b) 120°F(c) 140°F(d) 160°FI had been asked this question in examination.My question is taken from Molding Sand Preparation in portion Sand Preparation of Casting-Forming-Welding I
Answer» Right choice is (a) 100°F To elaborate: In sand preparation, the requirement of temperature for production is less than 40°C. The said sand, being USED for MANUFACTURING, should be cooled down below 100°F to avoid later DIFFICULTIES in making the molds.

Discussion

18.	In a moisture content test, for how long should the sand in infrared heating bulb be heated?(a) 1 – 2 minutes(b) 2 – 3 minutes(c) 3 – 4 minutes(d) 4 – 5 minutesThe question was posed to me in an online quiz.My enquiry is from Testing of Molding Sand in portion Sand Preparation of Casting-Forming-Welding I
Answer» Correct option is (b) 2 – 3 minutes The BEST explanation: The MOISTURE CONTENT tests are highly performed in a heating BULB. About 20 to 50 grams of the PREPARED sand is heated using infrared heating for 2 to 3 minutes in the infrared heating bulb.

Discussion

19.	Which of the following process deals with mixing the molding sand elements?(a) Sand mixing(b) Sand preparation(c) Sand tempering(d) Sand conditioningThis question was addressed to me in an international level competition.My question is taken from Molding Sand Preparation topic in portion Sand Preparation of Casting-Forming-Welding I
Answer» Right choice is (b) SAND preparation The best explanation: In sand preparation, the PROCESS which is dealing with the BASIC preparation of MOLD sand is called as sand conditioning. The mixing of MOLDING elements of sand is dealt by the process called sand preparation.

Discussion

20.	In sand preparation, which of the following is not used as an additive?(a) Clay(b) Cereal(c) Wax(d) MoistureI had been asked this question in an internship interview.This interesting question is from Molding Sand Preparation in chapter Sand Preparation of Casting-Forming-Welding I
Answer» Correct option is (c) Wax The EXPLANATION is: AMONG the FOLLOWING, clay and cereals are binders, hence used. Moisture too is needed for sand preparation, but in CASE of wax, it is not counted among additives.

Discussion

Explore topic-wise InterviewSolutions in .

Grain distribution is not determined by the Grain fineness test.(a) True(b) FalseI have been asked this question in final exam.My enquiry is from Testing of Molding Sand topic in division Sand Preparation of Casting-Forming-Welding I

In clay content determination of molding sand, which is the base solution used?(a) KOH(b) NaOH(c) Mg(OH)2(d) Ca(OH)2I got this question in an interview for job.This intriguing question originated from Testing of Molding Sand topic in division Sand Preparation of Casting-Forming-Welding I

What should be the accuracy of automatic moisture control for manufacturing sands?(a) ± 0.1%(b) ± 0.2%(c) ± 0.3%(d) ± 0.4%I got this question during an online interview.The query is from Molding Sand Preparation in division Sand Preparation of Casting-Forming-Welding I

The pressure of which gas gives the reading of water content on the pressure gauge?(a) Methane(b) Acetone(c) Acetylene(d) Carbon dioxideThis question was posed to me during an online exam.Asked question is from Testing of Molding Sand in division Sand Preparation of Casting-Forming-Welding I

A low speed muller is used in mechanized foundries.(a) True(b) FalseI had been asked this question in an international level competition.I'm obligated to ask this question of Molding Sand Preparation topic in portion Sand Preparation of Casting-Forming-Welding I

In a moisture content test, what amount of prepared sand is placed on the pan?(a) 10-40 grams(b) 20-50 grams(c) 30-60 grams(d) 40-70 gramsThis question was posed to me in a job interview.Query is from Testing of Molding Sand topic in division Sand Preparation of Casting-Forming-Welding I

Calcium carbide reacts with moisture to give out which gas?(a) Acetylene gas(b) Methane(c) Carbon dioxide(d) Carbon monoxideThis question was posed to me in unit test.This question is from Testing of Molding Sand in portion Sand Preparation of Casting-Forming-Welding I

Air blasts are provided for forced cooling of sand after muller operation.(a) True(b) FalseThis question was posed to me in an internship interview.Origin of the question is Molding Sand Preparation topic in section Sand Preparation of Casting-Forming-Welding I

What is the temperature requirement of sand, for manufacturing?(a) Below 40°C(b) Below 50°C(c) Below 60°C(d) Below 70°CThe question was asked during an online exam.I need to ask this question from Molding Sand Preparation in section Sand Preparation of Casting-Forming-Welding I

How much distilled water is added to 3% NaOH solution in clay content determination of molding sand?(a) 450 cc(b) 475 cc(c) 500 cc(d) 550 ccThe question was asked in my homework.My query is from Testing of Molding Sand topic in portion Sand Preparation of Casting-Forming-Welding I

To avoid difficulties in making of molds, sand should be cooled below what temperature?(a) 100°F(b) 120°F(c) 140°F(d) 160°FI had been asked this question in examination.My question is taken from Molding Sand Preparation in portion Sand Preparation of Casting-Forming-Welding I

In sand preparation, which of the following is not used as an additive?(a) Clay(b) Cereal(c) Wax(d) MoistureI had been asked this question in an internship interview.This interesting question is from Molding Sand Preparation in chapter Sand Preparation of Casting-Forming-Welding I