This set of Casting, Forming and Welding Multiple Choice Questions & Answers (MCQs) focuses on “Molding Sand Preparation”.
1. In sand preparation, which of the following is not used as an additive?
a) Clay
b) Cereal
c) Wax
d) Moisture
View Answer
Explanation: 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.
2. 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 tempering
View Answer
Explanation: Sand tempering is linked with sand preparation, wherein the amount of moisture needed as an additive is added.
3. Which of the following process deals with preparation the mold sand?
a) Sand mixing
b) Sand preparation
c) Sand tempering
d) Sand conditioning
View Answer
Explanation: Among sand mixing, sand preparation, sand tempering and sand conditioning, the process that deals with preparation of the mold sand is sand conditioning.
4. Which of the following process deals with mixing the molding sand elements?
a) Sand mixing
b) Sand preparation
c) Sand tempering
d) Sand conditioning
View Answer
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.
5. What is the temperature requirement of sand, for manufacturing?
a) Below 40°C
b) Below 50°C
c) Below 60°C
d) Below 70°C
View Answer
Explanation: 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.
6. 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°F
View Answer
Explanation: 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.
7. What should be the accuracy of automatic moisture control for manufacturing sands?
a) ± 0.1%
b) ± 0.2%
c) ± 0.3%
d) ± 0.4%
View Answer
Explanation: 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%.
8. A low speed muller is used in mechanized foundries.
a) True
b) False
View Answer
Explanation: In mechanized foundries, a high speed muller is essentially used which rotates in a horizontal direction.
9. 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 time
View Answer
Explanation: 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.
10. Air blasts are provided for forced cooling of sand after muller operation.
a) True
b) False
View Answer
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.
Sanfoundry Global Education & Learning Series – Casting, Forming and Welding.
To practice all areas of Casting, Forming and Welding, here is complete set of 1000+ Multiple Choice Questions and Answers.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
- Practice Casting, Forming and Welding II MCQ
- Apply for Mechanical Engineering Internship
- Practice Metallurgical Engineering MCQs
- Check Mechanical Engineering Books
- Apply for Metallurgical Engineering Internship
