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Materials and Construction Quiz 7

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Materials and Construction Quiz 7

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Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysteresis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ?

2 / 50

Rotary kilns in cement industry are lined with ______bricks?

3 / 50

Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with_______?

4 / 50

Tank furnace used for melting of glass is made of_____?

5 / 50

Reactor used in the production of polyvinyl chloride (PVC) is made of______?

6 / 50

Silicon percentage in acid resistant cast iron is about_________?

7 / 50

Steel rods are used in reinforced concrete to increase its _______ strength?

8 / 50

Softness of silver can be converted into hardness by alloying it with small quantity of__________?

9 / 50

Silicon percentage in iron castings to have maximum hardness should be about___________?

10 / 50

Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with___________?

11 / 50

Stainless steel contains__________?

12 / 50

Sherardizing process is used for___________?

13 / 50

Presence of high phosphorous in cast iron increases its______?

14 / 50

Stainless steel is not corroded by _______?

15 / 50

Slow plastic deformation of metals under a constant stress is termed as ______ failure?

16 / 50

Teflon (PTFE) is corroded by________?

17 / 50

Presence of 0.3 to 0.5% arsenic in copper increases its______?

18 / 50

Refined acetic acid storage vessel are made of_____?

19 / 50

Steel balls for ball bearings are generally made of _______ steel?

20 / 50

Shock resisting steels should possess high_____?

21 / 50

Specify the material of construction suitable for handling concentrated HNO3 at 100?C ?

22 / 50

Spray dryer for evaporating milk to produce milk powder is made of__________?

23 / 50

Silicone rubber is not resistant to the corrosive action of______?

24 / 50

SO3 is absorbed using H2SO4 in a______?

25 / 50

Rubber lined vessels are corroded by the action of___________?

26 / 50

Residual magnetism in steel for magnets is increased by the addition of___________?

27 / 50

Softening of hardened steel is done by its_______?

28 / 50

Rotary driers are generally made of________?

29 / 50

Sulphur melting pit in the sulphuric acid plant is made of___________?

30 / 50

Rubber lined pumps can be used to pump__________?

31 / 50

Spark plugs are made of________?

32 / 50

Soap kettle used in the production of laundry soap is made of______?

33 / 50

Presence of even 0.005% of ______ in copper makes it highly brittle, rendering it useless for wire-drawing?

34 / 50

Presence of cobalt in steel improves its______?

35 / 50

Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is ______ percent?

36 / 50

Presence of nickel in steel improves its__________?

37 / 50

Presence of nitrogen in steel_____?

38 / 50

Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)_____?

39 / 50

Reduction in the grain size reduces the ________ of the material?

40 / 50

Spark plugs, ignition tubes and electrodes are made of nickel _____ alloys?

41 / 50

Steel tower used for the storage of oleum_________?

42 / 50

Presence of silicon in steel_______?

43 / 50

Presence of even very minute amount (say 0.1%) of _______ in copper, reduces its electrical conductivity very seriously?

44 / 50

Purity of electrical grade aluminium should be ? ______ percent?

45 / 50

Steel pipes are normally manufactured by _______ process?

46 / 50

Presence of manganese in alloy steel improves its_____?

47 / 50

Sulphuric acid pickling tanks are lined with___________?

48 / 50

Presence of high amount of silicon in cast iron_________?

49 / 50

Tempering of steel is done to make it_________?

50 / 50

Slow and progressive deformation of a material with time under constant stress is called_____?

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