Casting, Forming and Welding I Mock Test 9

1. In salvaging process, the metallic particles used for enhancing heat transfer may stick to the surface areas of casting by melting itself.

2. Predominant resistance in mould of casting system generally produces castings of brittle nature.

3. To reduce the friction between the mould’s surface and casting, a refractory coating is done to the surface of mould.

4. Which of the following method is most suited for salvaging?

5. The maintenance cost in mechanized foundry is also cheap as the cost of castings produced by mechanization.

6. In mechanized foundry, rubber conveyor cannot be used for long time during production of castings.

7. The allowable thermal gradient generally depends on the shape and size of a cross-section of the casting.

8. The method of scrubbing or cleaning cannot be used for excessively large castings in a mechanized foundry.

9. In electric arc wire spray process, the atomizing air pressure is the only significant variable for controlling the surface layers.

10. Which of the following temperature ranges (in Kelvin) can start the re-melting of droplets of casting material?