This set of Casting, Forming and Welding Multiple Choice Questions & Answers (MCQs) focuses on “Indian Sand And Core Sand”.
1. Foundry sands cannot be obtained in which of the following states?
a) Uttar Pradesh
b) Punjab
c) Orissa
d) Bihar
View Answer
Explanation: Foundry sand is found to be available in many parts of India like Uttar Pradesh, Punjab and Orissa, but it is not available in the state of Bihar.
2. Foundry sand is found in which part of Maharashtra?
a) Satara
b) Mumbai
c) Nagpur
d) Nasik
View Answer
Explanation: Foundry sand is available in Maharashtra, but it is not available in all parts of the state. It is found only in the parts of Satara.
3. Which of the following is not a core sand property?
a) Dry strength
b) Hardness
c) Low collapsibility
d) Good Permeability
View Answer
Explanation: Dry strength, hardness and a good amount of permeability are a few properties of core sand. Low collapsibility is not any of the property of core sands, in fact, core sands are supposed to have high collapsibility.
4. Good friability is one of the properties of core sand.
a) True
b) False
View Answer
Explanation: Good friability is one of the properties of the core sand so that the core falls away when it is to be removed from castings.
5. Which of the following is not a core sand ingredient?
a) Water
b) Wax
c) Granular refractories
d) Core binders
View Answer
Explanation: For the core material, water, granular refractories and core binders are ingredients which are highly used. The ingredients used do not involve wax in it and hence is not a part of the ingredients.
6. What is the melting point of Zircon?
a) 3450°F – 4620°F
b) 3750°F – 4820°F
c) 3850°F – 4820°F
d) 4400°F – 5320°F
View Answer
Explanation: According to the properties of granular refractories, Zircon has a melting point temperature of 3450°F to 4620°F. Zircon is a kind of material which does not show much changes in physical aspects on exceedingly high temperatures.
7. What is the melting point of Olivin?
a) 3450°F – 4620°F
b) 3200°F – 3450°F
c) 3100°F – 3220°F
d) 3400°F – 3620°F
View Answer
Explanation: According to the properties of granular refractories, Olivin has a melting point temperature of 3200°F to 3450°F. Olivin is one of the materials which do not change its state at low temperatures.
8. What is the melting point of Chamotte?
a) 3450°F – 4620°F
b) 3200°F – 3450°F
c) 3100°F – 3200°F
d) 3400°F – 3620°F
View Answer
Explanation: According to the properties of granular refractories, Chamotte has a melting point temperature of 3100°F to 3200°F. The melting point of chamotte is comparatively lower than zircon and olivin.
9. What is the melting point of Silica, for granular refractories?
a) 3453°F
b) 3206°F
c) 3119°F
d) 3467°F
View Answer
Explanation: According to the properties of granular refractories, Silica has a melting point temperature of 3119°F. The melting points of silica and chamotte are calculated to be almost equal.
10. For the granular refractories, what is the melting point of Carbon?
a) 6800°F
b) 6200°F
c) 6400°F
d) 6500°F
View Answer
Explanation: According to the properties of granular refractories, Carbon has a melting point temperature of 6400°F. Among all the granular refractories, the melting point of carbon is considered to be the highest.
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