Materials and Construction Quiz 7
1 / 50
Teflon (PTFE) is corroded by________?
2 / 50
Steel rods are used in reinforced concrete to increase its _______ strength?
3 / 50
Presence of nitrogen in steel_____?
4 / 50
Rubber lined vessels are corroded by the action of___________?
5 / 50
Softening of hardened steel is done by its_______?
6 / 50
Soap kettle used in the production of laundry soap is made of______?
7 / 50
Residual magnetism in steel for magnets is increased by the addition of___________?
8 / 50
Slow plastic deformation of metals under a constant stress is termed as ______ failure?
9 / 50
SO3 is absorbed using H2SO4 in a______?
10 / 50
Reactor used in the production of polyvinyl chloride (PVC) is made of______?
11 / 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%) ?
12 / 50
Stainless steel is not corroded by _______?
13 / 50
Steel pipes are normally manufactured by _______ process?
14 / 50
Tank furnace used for melting of glass is made of_____?
15 / 50
Specify the material of construction suitable for handling concentrated HNO3 at 100?C ?
16 / 50
Presence of high amount of silicon in cast iron_________?
17 / 50
Presence of cobalt in steel improves its______?
18 / 50
Spark plugs, ignition tubes and electrodes are made of nickel _____ alloys?
19 / 50
Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with_______?
20 / 50
Rotary kilns in cement industry are lined with ______bricks?
21 / 50
Presence of high phosphorous in cast iron increases its______?
22 / 50
Stainless steel contains__________?
23 / 50
Rubber lined pumps can be used to pump__________?
24 / 50
Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with___________?
25 / 50
Silicone rubber is not resistant to the corrosive action of______?
26 / 50
Slow and progressive deformation of a material with time under constant stress is called_____?
27 / 50
Presence of manganese in alloy steel improves its_____?
28 / 50
Spark plugs are made of________?
29 / 50
Silicon percentage in iron castings to have maximum hardness should be about___________?
30 / 50
Purity of electrical grade aluminium should be ? ______ percent?
31 / 50
Rotary driers are generally made of________?
32 / 50
Presence of even 0.005% of ______ in copper makes it highly brittle, rendering it useless for wire-drawing?
33 / 50
Sulphur melting pit in the sulphuric acid plant is made of___________?
34 / 50
Tempering of steel is done to make it_________?
35 / 50
Reduction in the grain size reduces the ________ of the material?
36 / 50
Presence of silicon in steel_______?
37 / 50
Refined acetic acid storage vessel are made of_____?
38 / 50
Softness of silver can be converted into hardness by alloying it with small quantity of__________?
39 / 50
Presence of even very minute amount (say 0.1%) of _______ in copper, reduces its electrical conductivity very seriously?
40 / 50
Presence of 0.3 to 0.5% arsenic in copper increases its______?
41 / 50
Steel tower used for the storage of oleum_________?
42 / 50
Spray dryer for evaporating milk to produce milk powder is made of__________?
43 / 50
Silicon percentage in acid resistant cast iron is about_________?
44 / 50
Sulphuric acid pickling tanks are lined with___________?
45 / 50
Shock resisting steels should possess high_____?
46 / 50
Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)_____?
47 / 50
Presence of nickel in steel improves its__________?
48 / 50
Sherardizing process is used for___________?
49 / 50
Steel balls for ball bearings are generally made of _______ steel?
50 / 50
Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is ______ percent?
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