Engineering material MCQ for GATE+IES+PSU etc.

Engineering material MCQ for GATE+IES+PSU etc.

01. The elastic limit of cast iron is

Close to ultimate breaking strength

02. Grey iron

Has low ductility

03. In carbon steel castings the percentage of carbon is less than

1.7%.

04. Iron alloyed with carbon more than

2 % is called

Cast iron

05. Metal spinning

Is done on symmetrical articles

06. The percentage of carbon in low carbon steel is

0.15

07. The presence of Sulphur in pig iron

makes

Its casting unsound

08. The technique of converting metallic powders into articles of definite form is known as

Powder metallurgy

09. In powder metallurgy the process of heating the cold pressed metal powder is known as

Sintering

10. The process of shaping thin metals by pressing it against form while it is rotating is known as

Metal spinning

11. In press work the dies that perform two or more operations simultaneously, but at different stations are known as

Progressive dies

12. The process of pulling a rod through

series of decreasing diameters is

known as

Wire drawing

13. The operation of cutting out flat areas to some desired shape and which is generally the first step in a series of operations is known as

Blanking

14. In press work the dies which combine two or more operations at one station is known as

Compound dies

15. The amount of cold work that a metal will stand is dependent upon

Ductility

16. The process of zinc coating used extensively for protecting steel from atmospheric deterioration is known as

Galvanizing

17. Galvanizing is generally done on

Low carbon steels

18. In high speed steel the maximum percentage of any alloying element is

Tungsten

19. Steel with 0.8% carbon and 100 % pearlite is called

                

Eutectoid

20. Coarse grained steels

Are less tough

21. A steel having ferrite and pearlite is

Soft

  

22. The maximum hardenability of any steel depends on

The carbon contents

23. The essential gradient of any hardened steel is

Martensite

  

24. Delta iron occurs at temperature in the range of

Between 1400°C and 1530°C

25. The ability of a tool to resist softening at high temperatures is known as

Red hardness

26. Gamma iron exists at temperatures in the range

Between 900°C and 1400°C

27. Solder is an alloy consisting of

Tin and lead

28. German silver is an alloy of

Nickel, copper and zinc

29. The fine-grained steel

Are ductile

30. Carburizing is done

On steels with carbon percentage of

0.5.

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