ফাউন্ড্রি এন্ড প্যাটার্ন মেকিং MCQ
1. Casting replica used to make the cavity is called as--
Mould
Cope
Pattern
None of the above
2. Metal patterns have a longer life than wooden pattern.
True
False
3. In sand castings, modification of bosses is done to-
have good surface finish
reduce the chances of porosity
eliminate the use of core
reduce casting yield
4. Which of the following is not a criteria for selecting pattern materials?
Method of moulding
Establishment of parting line
Chances of repeat orders
Complexity of the casting
5. Which of the following is the heaviest?
White
Cast Iron
Brass
Aluminium
6. Steel is an alloy of which two elementy?
Iron and Brass
Brass and aluminium
Iron and carbon
Carbon and aluminium
7. Which of the following patterns has high compressive strength?
Plastic pattern
Plaster pattern
Polystyrene pattern
Wax pattern
8. Which of the following is not a limitation of wooden patterns?
Get abraded easily
Absorb moisture
Difficult machining
Poor wear resistance
9. The axis of the cylindrical boss should be in the parting plane to have satisfactorily use of boss in casting.
True
False
10. What should the sulphur level in foam plastic be?
More than 1%
Between 0.5% 1.19%
Less than 0.1%
Between 0.1% to 0.5%
11. Which of the following is not a limitation of metal patterns?
Get rusted
Obtain rough surface finish
Expensive
Heavy
12. The ability of moulding sand to withstand the heat of melt without showing any sign of called as-.
Strength
Refractiveness
Collapsibility
None
13. Which of the following statement is true?
Casting is the replica of the object to be cast
Pattern is the replica of the casting object
Casting and the pattern are same things
Molten material is cassed into the casting cavity
14. Core boxes are made out of which pattern?
Plaster pattern
Metal patterns
Polystyrene pattern
Wax pattern
15. The designing of a pattern does not include which of the following feature?
To locate the direction of the parting line and adjust the component accordingly
To determine regions and measurement of draft angles and radii of the sharp edges where allowances are to be given
To recognize and abolish the region of or where the defects could take place during casting
To 3D print the design for making the pattern.
16. Which of the following is considered to be light wood?
Mahogany
Birch
Maple
White pine
17. Which of the following is 'not' an allowance given to the pattern for casting?
Shrinkage
Hole
Draft
Machining
18. Which of the following material is not used for mold making?
Iron
Mild steel
Zinc
Alloy steel
19. In solid casting method, the resin mixture is kept for how much time for hardening and curing?
1-2 hours
2-3 hours
3-4 hours
4-5 hours
20. Which of the following patterns do not withstand rough handling?
Cast iron
Aluminium
Brass
Steel