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