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