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