PPSC Chemistry Part VI Applied/Industrial Chemistry Online Test With Answers

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PPSC Chemistry Part VI Applied/Industrial Chemistry Online Test

Sr. # Questions Answers Choice
1 Which of the following cast irons is a high carbon silicon alloy. Gray iron White iron Malleable iron Alloy iron
2 Which of the following cast irons is a high carbon, iron carbon silicon alloy. Deorizers Deoxidizers Deoxifiers Deterrent
3 A steel cannot qualify for stainless prefix until it has at least how many percent of chromium. 10 % 20 % 5 % 30 %
4 What combination of elements has high electrical resistance high corrosion resistance, and high strength at red hear temperatures, making it useful in resistance heating. Aluminium bronze Nichrome Hastelloy None of above
5 What refers to the tin mill steel, without a coating. White plate Black plate Tin steel free Dichromate tin
6 What letter suffix steel identification means that it is steel with boron as an alloying elements. xxL xx xxBxx xxHxx xxKxx
7 What is prefix in steel identification means it is made in an electric furnaced. E H B Z
8 What prefix in steel identification means composition varies from normal limits. E B X F
9 Which of the following statements is NOT true . About 10% of the earth's crust is iron Pure iron does not have significant industrial use because it is too weak and soft. Steel in an alloy of carbon and iron with limits on the amount of carbon None of above
10 What is the purpose of molybdenum in steel alloying. To increase dynamic and high temperature strength and hardness To increase brittleness To increase corrosion and resistance All above
11 The use of acids to remove oxides and acids on hot worked steels is known as Tempering Picking Machining Sizing
12 Low quality steels with an M. Suffix on the designation intended for non structural application is classified as. Merchant quality Commercial quality Drawing quality Low quality
13 What is the ASTM tension testing designation for standard method for steel products. A 370 E 345 E8 E 9
14 What ASTM test for shear strength is designated for plastics. D 732 D 790 D 695 D 638
15 What ASTM test for compression is designated for plastics. D 638 D 695 D 790 D 732
16 What ASTM test for tension is designated for plastics. A 370 D 638 E 292 None of these
17 Galvanized steel are steel products coated with Carbon Sulphur Zinc Iron
18 Steel that are used for axles, gears, and similar parts requiring medium to high and strength are known as. Medium carbon steel Low carbon steel Very high carbon High carbon steel
19 What group of steels are molybdenum high sped steels. Group A Group D Group M Group H
20 The group of steel are water hardened tool steels. Groups S Groups W Groups O Group F
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