ME8351 - Manufacturing Technology - 1

1) The ability of the moulding sand to withstand the heat of melt without showing any sign of softening is called as

• a. strength or cohesiveness

• b. refractiveness

• c. collapsibility

• d. adhesiveness

2) A model of casting, constructed to use for forming a mould in damp sand, is called as

• a. sand construction

• b. pattern

• c. cover

• d. none of the above

3) Which of the following is not a requirement of a good pattern?

• a. It should be light in weight to handle easily

• b. It should be smooth to make casting surface smooth

• c. It should have low strength to break it and to remove

• casting easily

  d. none of the above

4) The patterns which are made in two or more pieces are called as

• a. solid patters

• b. split patterns

• c. loose piece patterns

• d. none of the above

5) Permeability can be defined as the property of moulding sand

• a. to hold sand grains together

• b. to allow gases to escape easily from the mould

• c. to withstand the heat of melt without showing any sign of softening

• d. none of the above

6) The sand in its natural or moist state is called as

• a. green sand

• b. loam sand

• c. dry sand

• d. none of the above

7) What is the highest possible percentage of clay contents in loam sand?

• a. 10

• b. 20

• c. 30

• d. 50

8) Match the following contents of green sand in Group 1 with their approximate per cent in Group 2.

1. Silica -------------------------- A. 5 to 10 per cent

2. Clay --------------------------- B. 2 to 5 per cent

3. Bentonite --------------------- C. 8 to 15 per cent

4. Coal dust --------------------- D. 7 to 8 per cent

5. Water -------------------------- E. up to 75 per cent

• a. 1-(E), 2-(C), 3-(B), 4-(A), 5-(D)

• b. 1-(E), 2-(A), 3-(B), 4-(C), 5-(D)

• c. 1-(C), 2-(D), 3-(B), 4-(A), 5-(E)

• d. 1-(C), 2-(A), 3-(B), 4-(D), 5-(E)

9) Which of the following sentences is/are correct for casting process?

• a. Casting process is comparatively costly

• b. Objects of larges sizes cannot be produced easily by casting process

• c. The time required for the process of making casting is quite long

• d. All of the above sentences are correct

10) The productivity of casting process is comparatively

• a. lower than the productivity of other automatic processes like rolling

• b. higher than the productivity of other automatic processes like rolling

• c. similar to the productivity of other automatic processes like rolling

• d. unpredictable