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