1. Which of the following factor is not considered while selecting a kind of pattern?
a) Quantity of casting
b) Types of moulding method
c) Shape of the casting
d) Nature of moulding process
Explanation: Nature of moulding process is a factor used selecting pattern materials, whereas the quantity of casting, types of moulding method and shape of the casting are used for selecting a type of pattern.
2. Which type of pattern should be used for making stuffing box of the steam engine?
a) One piece pattern
b) Split Pattern
c) Sweep pattern
d) Gated pattern
Explanation: One piece pattern operations for moulding are used for manufacturing a small number of casting only. Hence, a stuffing box can be casted with this type of pattern.
3. The following figure represents which type of pattern?
a) One piece pattern
b) Split Pattern
c) Sweep pattern
d) Gated pattern
Explanation: The given figure here is depicting a one piece pattern. Here, as we see, there are no loose pieces available or any joints that bring it together. As there are no components or loose pieces attached to it, it is a one piece pattern.
4. The following figure represents which pattern?
a) Follow board pattern
b) Gated pattern
c) Match plate pattern
d) Segmental pattern
Explanation: The following figure we see there is a pivot. This pivot rotates in two directions namely, clockwise and anti-clockwise directions. A pattern with such an apparatus is called as Segmental pattern.
5. In a three piece pattern moulding arrangement, what keeps the alignment between the two parts of the pattern?
a) Cope
b) Drag
c) Dowel pins
d) Cheek
Explanation: Cope and drag are the portions of upper and lower part of the split and cheek form the middle one. Dowel pins are used for the alignment work in the pattern.
6. Piston rings are produced using which pattern?
a) Sweep pattern
b) Gated pattern
c) Match plate pattern
d) Loose piece pattern
Explanation: Match plate pattern are usually used for manufacturing small castings on a big scale. Hence, piston rings of the engine are made using this pattern.
7. Match Plate pattern consumes more time in moulding operations than loose piece pattern?
a) True
b) False
Explanation: In loose piece pattern, the pattern is drawn out first and then the loose pieces, which consumes more time. On the other hand, match plate casting is used for small casting only, hence operates in less time.
8. Which of the following pattern operation is cheapest?
a) Sweep pattern
b) Gated pattern
c) Match plate pattern
d) Skeleton pattern
Explanation: Skeleton pattern uses the least amount of material for the operations on pattern and therefore, it does not need a lot of investment on its materials, making it inexpensive.
9. Which pattern operation is used for manufacturing wheel rims?
a) Follow board pattern
b) Segmental pattern
c) Sweep pattern
d) Gated pattern
Explanation: In segmental pattern, it does not revolve continuously to make the mould, but completes one part of the mould and then goes to make the next portion. Hence, such type of pattern is used for making wheel rims and big gears.
10. The skeleton pattern is filled with sand.
a) True
b) False
Explanation: In skeleton pattern, the skeleton is made up of wood and then sand is added to the pattern. After putting the sand, then the pattern is rammed.