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