Materials and Construction Quiz 7

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Materials and Construction Quiz 7

1 / 50

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

2 / 50

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%) ?

3 / 50

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

4 / 50

Presence of cobalt in steel improves its______?

5 / 50

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

6 / 50

Presence of nitrogen in steel_____?

7 / 50

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

8 / 50

Tempering of steel is done to make it_________?

9 / 50

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

10 / 50

Stainless steel contains__________?

11 / 50

Rubber lined pumps can be used to pump__________?

12 / 50

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

13 / 50

Sherardizing process is used for___________?

14 / 50

Presence of nickel in steel improves its__________?

15 / 50

Rubber lined vessels are corroded by the action of___________?

16 / 50

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

17 / 50

Presence of silicon in steel_______?

18 / 50

Tank furnace used for melting of glass is made of_____?

19 / 50

Rotary driers are generally made of________?

20 / 50

Teflon (PTFE) is corroded by________?

21 / 50

Spark plugs are made of________?

22 / 50

Purity of electrical grade aluminium should be ? ______ percent?

23 / 50

Shock resisting steels should possess high_____?

24 / 50

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

25 / 50

SO3 is absorbed using H2SO4 in a______?

26 / 50

Silicone rubber is not resistant to the corrosive action of______?

27 / 50

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

28 / 50

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

29 / 50

Refined acetic acid storage vessel are made of_____?

30 / 50

Sulphuric acid pickling tanks are lined with___________?

31 / 50

Silicon percentage in acid resistant cast iron is about_________?

32 / 50

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

33 / 50

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

34 / 50

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

35 / 50

Presence of high phosphorous in cast iron increases its______?

36 / 50

Stainless steel is not corroded by _______?

37 / 50

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

38 / 50

Rotary kilns in cement industry are lined with ______bricks?

39 / 50

Presence of high amount of silicon in cast iron_________?

40 / 50

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

41 / 50

Steel tower used for the storage of oleum_________?

42 / 50

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

43 / 50

Presence of manganese in alloy steel improves its_____?

44 / 50

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

45 / 50

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

46 / 50

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

47 / 50

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

48 / 50

Steel pipes are normally manufactured by _______ process?

49 / 50

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

50 / 50

Softening of hardened steel is done by its_______?

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