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Engineering Materials And Metallurgy & Manufacturing Technology

1. Guest theory is used for

1. Brittle materials 2.ductile materials 3. Elastic materials

4. Plastic materials

2. Babbit metal is a

1. Lead base alloy 2.copper base alloy 3. Tin base alloy4. Cadmium base alloy

3. A molecule consisting of one atom is known as

1. Monatomic 2.diatomic 3. Triatomic 4.polyatomic4. The process extensively used for making bolts and nuts is

1. Hot pressing 2.cold heading 3. Cold peening 4. Extrusion

5. The material which can be best cut with oxygen cutting process is

1. Mild steel 2. Brass 3. Copper 4. Aluminum

6. Shock resisting steels should have

1. Low wear resistance 2. Low hardness 3. Low tensile strength 4.

Toughness

7. For the pipe fitting like elbow, tee, union etc., which of the following is

preferred?

1. Pig iron 2. Malleable case iron 3. Spheroidal graphite case iron 4. High

carbon steel

8. Malleable cast iron is produced

1. by adding magnesium to molten 2. By quick cooling of molten case iron

3. From white cast iron by annealing process 4. None of these

9. The cupola is used to manufacture

1. Cast iron 2. Mild steel 3. High speed steel 4. Cast tool steel

10. The atomic mass of sulphur is

1).12 2). 14 3). 16 4).32

11. The surface finish factor for a mirror polished material is

1).0.45 2). 0.65 3). 0.85 4).1

12. The flux commonly used in brazing is

1. Zinc chloride 2. Ammonium chloride 3. Rosin plus alcohol 4. Borax

13. The cold chisels are made by

1. Cast iron 2. Mild steel 3. High speed steel 4. Cast tool steel

14. Discontinues chips are formed during machining of

1. Brittle materials 2. Ductile metals 3. Hard materials 4.soft materials

15. Ceramics tools are fixed to tool body by

1. Soldering 2. Brazing 3. Welding 4.clamping

16. Tool signature consists of ---------- elements

1. Two 2. Six 3. Seven 4.eight

17. A mandrel is used to hold

1. An eccentric work 2. A heavy work 3. Thin work 4.none of these

18. The guide ways are of

1. Flat type 2. Dovetail type 3. V type 4.none of the above

19. Drilling is an example of

1. Orthogonal cutting 2. Oblique cutting 3. Simple cutting 4.Uniformcutting

20. The operation smoothing and squaring the surface around a hole is known as

1. Spot facing 2.Counter boring 3. Counter sinking 4.Trepanning

21. Usually the values of helix angle of a drill is

1). 20 2). 30 3). 25 4). 45

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22. The cutting speed of a drill depends upon the

1. Material of drill 2.Qulity of surface finish desired 3.Tybe of materials to be

drilled 4. All of these

23. A twist drill is specified by its

1. Shank, material and diameter 2.shank, lip angle and size of flute 3. Material,

length of body and helix angle 4. Any one of these

24. In reaming process

1. Metal removal rates are high 2. High surface finish is obtained

3. High form accuracy is obtained 4. High dimensional accuracy obtained

25. The size of the shaper is given by

1. Stroke length 2. Motor power 3. Mass of machine 4. Ratesize

26. Surface grinding is done to produce

1. tapered surface 2. Flat surface 3. Internal cylindrical surface

4. All of these

27. The grinding operation is a

1. Shaping operation 2. Forming operation 3. Surface finishing operation

4. Dressing operation

28. Buffing wheels are made of

1. Softer metals 2. Cotton fabric 3. Carbon 4. Graphite

29. Internal gears can be made by

1. Hobbing 2. Milling 3. Shaping with rack cutter 4.

Shaping with pinion cutter

30. A process of removing metal by pushing or pulling a cutting tool is called

1. up milling 2. Down milling 3. Forming 4. Broaching