Quiz On Phase Diagrams

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Questions: 35 | Attempts: 449 | Updated: Mar 22, 2023

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A non-graded Materials Engineering Quiz on Phase Diagrams

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Current Version
Mar 22, 2023

Quiz Edited by
ProProfs Editorial Team
Mar 06, 2014

Quiz Created by
Ahmad_Saif

Quiz On Phase Diagrams

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.

The pro-eutectic phase is the phase inside the eutectic structure.

A & B are two metals which are insoluble in the solid state. As temperature increases, the solubility limit increases.

A peritectoid reaction occurs when a solid phase reacts with a liquid phase to produce a new solid phase.

Steel, which consists of Iron (metal) and Carbon (non-metal), can be considered as an alloy.

In substitutional solid solution between A & B, an atom of A substitutes a void between the atoms of B.

The intermetallic compound is considered as a single phase alloy.

A eutectic reaction occurs by decomposing a liquid into two solid phases by cooling.

There is no probability to find a thermal arrest in an alloy’s cooling curve.

For an alloy, solidification starts at the solidus line.

Segregation is the composition gradient in each grain of the solid solution, from the middle to the boundaries.

Segregation can be eliminated by a heat treatment process called “quenching”.

Peritectic reaction occurs by decomposing a solid phase into two solid phases by cooling.

Any alloy solidifies in a range of temperatures.

If an alloy consists of completely soluble solid solution between Germanium and Silicon, then it has one phase.

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).

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:

ii. The weight of the pro-eutectic phase is:

iii. The weights of the eutectic phases are:

iv. The weights of Fe and Nb in the eutectic phases are:

v. The weights of Fe and Nb in the pro-eutectic phase are:

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.

ii. The amount of the eutectic GeK phase.

iii. The amount of the eutectic GeK₃ phase.

iv. The weights of Ge and K in the eutectic phases.

v. The weights of Ge and K in the pro-eutectic phase.

A Molybdenum (Mo)-Zirconium (Zr) alloy, whose mass is 1000 g, is slowly cooled to a temperature that is just below 738°C. It was then discovered that it contains 407.89 g of total Mo₂Zr phases. Find: i. The composition of the alloy.

ii. The amount of the eutectoid (aZr) phase.

iii. The weights of Mo and Zr in the eutectoid phases.

An Vanadium (V)-Silicon (Si) alloy, whose mass is 1000 g, is slowly cooled to a temperature that is just below 1400°C. It was then discovered that it contains 53.25 g of eutectic VSi₂ phase. Find: i. The composition of the alloy.

ii. The amount of the eutectic phase.

iii. The amount of the pro-eutectic phase VSi₂.

iv. The amount of the eutectic (Si) phase.

v. The weights of V and Si in the eutectic phases.

The atomic weights for Gadolinium (Gd) and Magnesium (Mg) are 157.25 and 24.3 g/mol, respectively. For a 88.78 mol.% Mg alloy, that is cooled down to a temperature that is just above 821°K, select the correct answer(s): a) In the current state, the present phases are:

The atomic weights for Gadolinium (Gd) and Magnesium (Mg) are 157.25 and 24.3 g/mol, respectively. For a 88.78 mol.% Mg alloy, that is cooled down to a temperature that is just above 821°K, select the correct answer(s): b) The amounts of the present phases are:

Quiz On Phase Diagrams

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.

The pro-eutectic phase is the phase inside the eutectic structure.

A & B are two metals which are insoluble in the solid state. As temperature increases, the solubility limit increases.

A peritectoid reaction occurs when a solid phase reacts with a liquid phase to produce a new solid phase.

Steel, which consists of Iron (metal) and Carbon (non-metal), can be considered as an alloy.

In substitutional solid solution between A & B, an atom of A substitutes a void between the atoms of B.

The intermetallic compound is considered as a single phase alloy.

A eutectic reaction occurs by decomposing a liquid into two solid phases by cooling.

There is no probability to find a thermal arrest in an alloy’s cooling curve.

For an alloy, solidification starts at the solidus line.

Segregation is the composition gradient in each grain of the solid solution, from the middle to the boundaries.

Segregation can be eliminated by a heat treatment process called “quenching”.

Peritectic reaction occurs by decomposing a solid phase into two solid phases by cooling.

Any alloy solidifies in a range of temperatures.

If an alloy consists of completely soluble solid solution between Germanium and Silicon, then it has one phase.

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).

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:

ii. The weight of the pro-eutectic phase is:

iii. The weights of the eutectic phases are:

iv. The weights of Fe and Nb in the eutectic phases are:

v. The weights of Fe and Nb in the pro-eutectic phase are:

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.

ii. The amount of the eutectic GeK phase.

iii. The amount of the eutectic GeK3 phase.

iv. The weights of Ge and K in the eutectic phases.

v. The weights of Ge and K in the pro-eutectic phase.

A Molybdenum (Mo)-Zirconium (Zr) alloy, whose mass is 1000 g, is slowly cooled to a temperature that is just below 738°C. It was then discovered that it contains 407.89 g of total Mo2Zr phases. Find: i. The composition of the alloy.

ii. The amount of the eutectoid (aZr) phase.

iii. The weights of Mo and Zr in the eutectoid phases.

An Vanadium (V)-Silicon (Si) alloy, whose mass is 1000 g, is slowly cooled to a temperature that is just below 1400°C. It was then discovered that it contains 53.25 g of eutectic VSi2 phase. Find: i. The composition of the alloy.

ii. The amount of the eutectic phase.

iii. The amount of the pro-eutectic phase VSi2.

iv. The amount of the eutectic (Si) phase.

v. The weights of V and Si in the eutectic phases.

The atomic weights for Gadolinium (Gd) and Magnesium (Mg) are 157.25 and 24.3 g/mol, respectively. For a 88.78 mol.% Mg alloy, that is cooled down to a temperature that is just above 821°K, select the correct answer(s): a) In the current state, the present phases are:

The atomic weights for Gadolinium (Gd) and Magnesium (Mg) are 157.25 and 24.3 g/mol, respectively. For a 88.78 mol.% Mg alloy, that is cooled down to a temperature that is just above 821°K, select the correct answer(s): b) The amounts of the present phases are:

iii. The amount of the eutectic GeK₃ phase.

A Molybdenum (Mo)-Zirconium (Zr) alloy, whose mass is 1000 g, is slowly cooled to a temperature that is just below 738°C. It was then discovered that it contains 407.89 g of total Mo₂Zr phases. Find: i. The composition of the alloy.

An Vanadium (V)-Silicon (Si) alloy, whose mass is 1000 g, is slowly cooled to a temperature that is just below 1400°C. It was then discovered that it contains 53.25 g of eutectic VSi₂ phase. Find: i. The composition of the alloy.

iii. The amount of the pro-eutectic phase VSi₂.