Quiz On Phase Diagrams
A non-graded Materials Engineering Quiz on Phase Diagrams
- 1.1. يرجى قراءة السؤال جيدا (بفقراته) قبل بدء الإجابة. 2. لا يمكنك الرجوع إلى السؤال بعد تخطيه. 3. يرجى ملاحظة صياغة الإجابات، للتعود عليها وكتابتها حين تطلب منك لاحقا.
- 2.The pro-eutectic phase is the phase inside the eutectic structure.
- A.
True
- B.
False
- 3.A & B are two metals which are insoluble in the solid state. As temperature increases, the solubility limit increases.
- A.
True
- B.
False
- 4.A peritectoid reaction occurs when a solid phase reacts with a liquid phase to produce a new solid phase.
- A.
True
- B.
False
- 5.Steel, which consists of Iron (metal) and Carbon (non-metal), can be considered as an alloy.
- A.
True
- B.
False
- 6.In substitutional solid solution between A & B, an atom of A substitutes a void between the atoms of B.
- A.
True
- B.
False
- 7.The intermetallic compound is considered as a single phase alloy.
- A.
True
- B.
False
- 8.A eutectic reaction occurs by decomposing a liquid into two solid phases by cooling.
- A.
True
- B.
False
- 9.There is no probability to find a thermal arrest in an alloy’s cooling curve.
- A.
True
- B.
False
- 10.For an alloy, solidification starts at the solidus line.
- A.
True
- B.
False
- 11.Segregation is the composition gradient in each grain of the solid solution, from the middle to the boundaries.
- A.
True
- B.
False
- 12.Segregation can be eliminated by a heat treatment process called “quenching”.
- A.
True
- B.
False
- 13.Peritectic reaction occurs by decomposing a solid phase into two solid phases by cooling.
- A.
True
- B.
False
- 14.Any alloy solidifies in a range of temperatures.
- A.
True
- B.
False
- 15.If an alloy consists of completely soluble solid solution between Germanium and Silicon, then it has one phase.
- A.
True
- B.
False
- 16.Tungsten and Palladium are expected to have completely solubility in each other (both have atomic radius = 0.137 nm, Tungsten has a BCC crystal structure and Palladium has FCC crystal structure).
- A.
True
- B.
False
- 17.
![An Iron (Fe)-Niobium (Nb) alloy, weighs 3 kg, consists of 70% Fe – 30% Nb, is slowly cooled to a temperature that is just below 1373°C. Find:
i. The weight of the eutectic phase: - ProProfs]( "An Iron (Fe)-Niobium (Nb) alloy, weighs 3 kg, consists of 70% Fe – 30% Nb, is slowly cooled to a temperature that is just below 1373°C. Find:
i. The weight of the eutectic phase:")
An Iron (Fe)-Niobium (Nb) alloy, weighs 3 kg, consists of 70% Fe – 30% Nb, is slowly cooled to a temperature that is just below 1373°C. Find: i. The weight of the eutectic phase:- A.
1.24 kg.
- B.
1.76 kg.
- C.
0.73 kg.
- D.
2.27 kg.
- E.
1.85 kg.
- F.
1.15 kg.
- G.
0.72 kg.
- H.
2.28 kg.
- 18.
![ii. The weight of the pro-eutectic phase is: - ProProfs]( "ii. The weight of the pro-eutectic phase is:")
ii. The weight of the pro-eutectic phase is:- A.
1.76 kg.
- B.
1.24 kg.
- C.
2.27 kg.
- D.
0.73 kg.
- E.
1.15 kg.
- F.
1.85 kg.
- G.
2.28 kg.
- H.
0.72 kg.
- 19.
![iii. The weights of the eutectic phases are: - ProProfs]( "iii. The weights of the eutectic phases are:")
iii. The weights of the eutectic phases are:- A.
0.51 kg of e and 0.73 kg of (gFe).
- B.
1.04 kg of e and 0.72 kg of (gFe).
- C.
0.18 kg of e and 0.55 kg of (gFe).
- D.
1.72 kg of e and 0.55 kg of (gFe).
- E.
1.13 kg of m and 0.72 kg of (Nb).
- F.
0.72 kg of m and 1.13 kg of (Nb).
- G.
0.17 kg of m and 0.55 kg of (Nb).
- H.
1.73 kg of m and 0.55 kg of (Nb).
- 20.
![iv. The weights of Fe and Nb in the eutectic phases are: - ProProfs]( "iv. The weights of Fe and Nb in the eutectic phases are:")
iv. The weights of Fe and Nb in the eutectic phases are:- A.
0.19 kg of Nb in e, 0.31 kg of Fe in e, 0.04 kg of Nb in (gFe), and 0.69 kg of Fe in (gFe).
- B.
0.05 kg of Nb in e, 0.99 kg of Fe in e, 0.27 kg of Nb in (gFe), and 0.45 kg of Fe in (gFe).
- C.
0.07 kg of Nb in e, 0.11 kg of Fe in e, 0.03 kg of Nb in (gFe), and 0.52 kg of Fe in (gFe).
- D.
0.09 kg of Nb in e, 1.63 kg of Fe in e, 0.21 kg of Nb in (gFe), and 0.34 kg of Fe in (gFe).
- E.
0.43 kg of Fe in m, 0.70 kg of Nb in m, 0.03 kg of Fe in (Nb), and 0.69 kg of Nb in (Nb).
- F.
0.03 kg of Fe in m, 0.69 kg of Nb in m, 0.43 kg of Fe in (Nb), and 0.54 kg of Nb in (Nb).
- G.
0.07 kg of Fe in m, 0.11 kg of Nb in m, 0.21 kg of Fe in (Nb), and 0.34 kg of Nb in (Nb).
- H.
0.08 kg of Fe in m, 1.65 kg of Nb in m, 0.03 kg of Fe in (Nb), and 0.52 kg of Nb in (Nb).
- 21.
![v. The weights of Fe and Nb in the pro-eutectic phase are: - ProProfs]( "v. The weights of Fe and Nb in the pro-eutectic phase are:")
v. The weights of Fe and Nb in the pro-eutectic phase are:- A.
0.67 kg of Nb, and 1.09 kg of Fe.
- B.
0.06 kg of Nb, and 1.17 kg of Fe.
- C.
0.86 kg of Nb, and 1.41 kg of Fe.
- D.
0.04 kg of Nb, and 0.69 kg of Fe.
- E.
0.44 kg of Fe, and 0.72 kg of Nb.
- F.
0.09 kg of Fe, and 1.76 kg of Nb.
- G.
0.87 kg of Fe, and 1.41 kg of Nb.
- H.
0.03 kg of Fe, and 0.69 kg of Nb.
- 22.
![A Germanium (Ge)-Potassium (K) alloy, whose mass is 1000 g, is slowly cooled to a temperature that is just below 575°C. It was then discovered that it contains 615.38 g of pro-eutectic phase GeK. Find:
i. The composition of the alloy. - ProProfs]( "A Germanium (Ge)-Potassium (K) alloy, whose mass is 1000 g, is slowly cooled to a temperature that is just below 575°C. It was then discovered that it contains 615.38 g of pro-eutectic phase GeK. Find:
i. The composition of the alloy.")
A Germanium (Ge)-Potassium (K) alloy, whose mass is 1000 g, is slowly cooled to a temperature that is just below 575°C. It was then discovered that it contains 615.38 g of pro-eutectic phase GeK. Find: i. The composition of the alloy.- A.
40 % of K, and 60 % of Ge.
- B.
43 % of K, and 57 % of Ge.
- C.
45.38 % of K, and 54.62 % of Ge.
- D.
51.62 % of K, and 48.38 % of Ge.
- E.
31.15 % of Ge, and 68.85 % of K.
- F.
28.85 % of Ge, and 71.15 % of K.
- G.
26.15 % of Ge, and 73.85 % of K.
- H.
20.85 % of Ge, and 79.15 % of K.
- 23.
![ii. The amount of the eutectic GeK phase. - ProProfs]( "ii. The amount of the eutectic GeK phase.")
ii. The amount of the eutectic GeK phase.- A.
199.43 g.
- B.
20.70 g.
- C.
71.23 g.
- D.
147.93 g.
- E.
217.39 g.
- F.
12.54 g.
- G.
64.32 g.
- H.
147.93 g.
- 24.
![iii. The amount of the eutectic GeK3 phase. - ProProfs]( "iii. The amount of the eutectic GeK3 phase.")
iii. The amount of the eutectic GeK3 phase.- A.
185.19 g.
- B.
22.30 g.
- C.
113.96 g.
- D.
236.69 g.
- E.
167.23 g.
- F.
16.30 g.
- G.
102.91 g.
- H.
236.69 g.
- 25.
![iv. The weights of Ge and K in the eutectic phases. - ProProfs]( "iv. The weights of Ge and K in the eutectic phases.")
iv. The weights of Ge and K in the eutectic phases.- A.
69.80 g of K in GeK, 129.63 g of Ge in GeK, 114.82 g of K in GeK3, and 70.37 g of Ge in GeK3.
- B.
12.84 g of K in GeK, 7.87 g of Ge in GeK, 7.80 g of K in GeK3, and 14.49 g of Ge in GeK3.
- C.
24.93 g of K in GeK, 46.30 g of Ge in GeK, 70.66 g of K in GeK3, and 43.31 g of Ge in GeK3.
- D.
91.72 g of K in GeK, 56.21 g of Ge in GeK, 82.84 g of K in GeK3, and 153.85 g of Ge in GeK3.
- E.
76.09 g of Ge in GeK, 141.31 g of K in GeK, 20.07 g of Ge in Ge4K, and 147.16 g of K in Ge4K.
- F.
1.51 g of Ge in GeK, 11.04 g of K in GeK, 5.71 g of Ge in Ge4K, and 10.60 g of K in Ge4K.
- G.
22.51 g of Ge in GeK, 41.81 g of K in GeK, 12.35 g of Ge in Ge4K, and 90.56 g of K in Ge4K.
- H.
17.75 g of Ge in GeK, 130.18 g of K in GeK, 82.84 g of Ge in Ge4K, and 153.85 g of K in Ge4K.
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