Basic Engineering Materials Quiz!
What do you know about basic engineering? Basic engineering is an honorable trade. There are certain variables necessary for the work of engineering. Engineering can be separated into two groups. This grouping includes metals and non-metals. Different types of metals are non-ferrous, and others are ferrous. Engineering materials can be classified as metals and alloys, ceramic materials, and organic materials. This informative quiz will teach you about basic engineering.
Questions and Answers
- 1.
The number of atoms per unit cell in BCC is:
- A.
1
- B.
2
- C.
4
- D.
6
Correct Answer
B. 2Explanation
In a body-centered cubic (BCC) structure, there are 2 atoms per unit cell. This can be understood by visualizing the arrangement of atoms in a BCC lattice, where one atom is located at the center of the cube and another atom is at each of the eight corners. The atom at the center is shared by eight adjacent unit cells, while the atoms at the corners are only present in one unit cell each. Therefore, the total number of atoms per unit cell in BCC is 2.Rate this question:
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- 2.
Which of the following material does not have body centred cubic structure?
- A.
Chromium
- B.
Potassium
- C.
Lithium
- D.
Zirconium
Correct Answer
D. ZirconiumExplanation
Zirconium does not have a body centred cubic (BCC) structure. It has a hexagonal close-packed (HCP) structure instead. Body centred cubic structure is characterized by a lattice with atoms located at the corners and one atom at the centre of the cube. Chromium, potassium, and lithium all have a BCC structure.Rate this question:
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- 3.
Which of the following property is desirable in parts subjected to shock and impact loads?
- A.
Toughness
- B.
Brittleness
- C.
Strength
- D.
Stiffness
Correct Answer
A. ToughnessExplanation
Toughness is the desirable property in parts subjected to shock and impact loads because it measures a material's ability to absorb energy and deform plastically before fracturing. This means that a tough material can withstand sudden and intense forces without breaking or shattering, making it ideal for applications where impact resistance is crucial. Brittleness, on the other hand, refers to a material's tendency to fracture without significant deformation, making it unsuitable for shock and impact loads. Strength and stiffness are important properties as well, but they do not specifically address the ability to withstand shock and impact loads.Rate this question:
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- 4.
Which of the following is an etching reagent used for carbon steels?
- A.
Nital
- B.
Picral
- C.
None of the above
- D.
Both a and b
Correct Answer
D. Both a and bExplanation
Nital and Picral are both etching reagents used for carbon steels. Nital is a mixture of nitric acid and ethanol, while Picral is a mixture of picric acid and ethanol. These reagents are used to reveal the microstructure of carbon steels by selectively attacking the grain boundaries and phases present in the material. Both a and b are correct options as they represent the two commonly used etching reagents for carbon steels.Rate this question:
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- 5.
Which of the following metal has a face-centered cubic structure?
- A.
Cadmium
- B.
Tin
- C.
Gold
- D.
Magnesium
Correct Answer
C. GoldExplanation
Gold has a face-centered cubic structure. In this type of structure, the atoms are arranged in a cubic lattice with an atom at each corner and an additional atom at the center of each face of the cube. This arrangement provides a close packing of atoms and is commonly found in metals, including gold.Rate this question:
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- 6.
Which of the following metal has the lowest melting point?
- A.
Zinc
- B.
Antimony
- C.
Silver
- D.
Tin
Correct Answer
D. TinExplanation
Zinc has the lowest melting point among the given options. Zinc has a melting point of 419.53°C (787.15°F), which is relatively low compared to the other metals listed. Antimony has a melting point of 630.63°C (1167.13°F), silver has a melting point of 961.78°C (1763.2°F), and tin has a melting point of 231.93°C (449.47°F). Therefore, tin has the lowest melting point among these metals.Rate this question:
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- 7.
Closed packed hexagonal space lattice is found in:
- A.
Zinc, magnesium, cobalt, cadmium, antimony and bismuth
- B.
Gamma-iron, aluminium, copper, lead, silver and nickel
- C.
Alpha-iron, tungsten, chromium and molybdenum
- D.
None of the above
Correct Answer
A. Zinc, magnesium, cobalt, cadmium, antimony and bismuthExplanation
The given elements, zinc, magnesium, cobalt, cadmium, antimony, and bismuth, have a closed packed hexagonal space lattice. This means that their atoms are arranged in a hexagonal pattern with the maximum number of atoms packed together in a given space. The other options, gamma-iron, aluminium, copper, lead, silver, nickel, alpha-iron, tungsten, chromium, and molybdenum, do not have a closed packed hexagonal space lattice.Rate this question:
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- 8.
The property which enables metals to be drawn into wire is known as:
- A.
Malleability
- B.
Ductility
- C.
Plastic deformation
- D.
Elastic deformation
Correct Answer
B. DuctilityExplanation
Ductility is the property of a material that allows it to be drawn into thin wires without breaking. This property is essential for many applications, such as electrical wiring and jewelry making. Metals are known for their high ductility, as they have metallic bonds that allow the atoms to easily slide past each other when a force is applied. This enables the metal to be stretched and formed into a wire shape without losing its integrity. Malleability, on the other hand, refers to the ability of a material to be hammered or rolled into thin sheets. Plastic deformation and elastic deformation are not specifically related to the ability to be drawn into wire.Rate this question:
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- 9.
Machinability of metal depends on:
- A.
Hardness
- B.
Hardness and tensile strength
- C.
Brittleness and toughness
- D.
Brittleness
Correct Answer
B. Hardness and tensile strengthExplanation
The machinability of a metal refers to how easily it can be cut, shaped, or formed using machining processes. Hardness and tensile strength are two important factors that influence the machinability of a metal. A metal with high hardness and tensile strength may be more difficult to machine compared to a metal with lower hardness and tensile strength. This is because harder and stronger metals are more resistant to cutting and require more force to be applied during machining. Therefore, hardness and tensile strength are key considerations when determining the machinability of a metal.Rate this question:
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- 10.
The study of metallographic includes ___________________
- A.
Failure analysis
- B.
metal structure
- C.
alloy constituents
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
The study of metallographic includes failure analysis, metal structure, and alloy constituents. Metallography is a branch of material science that focuses on the microscopic examination of metals and alloys. It involves analyzing the structure, composition, and properties of metals to understand their behavior, performance, and potential failure mechanisms. By studying metallography, one can gain insights into the causes of failures, the effects of different alloy constituents on the material's properties, and the relationship between the metal's structure and its performance.Rate this question:
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- 11.
Body centred cubic space lattice is found in:
- A.
Gamma-iron, aluminium, copper, lead, silver and nickel
- B.
Zinc, magnesinm, cobalt, cadmium, antimony and bismuth
- C.
Alpha-iron, tungsten, chromium and molybdenum
- D.
None of the above
Correct Answer
C. Alpha-iron, tungsten, chromium and molybdenumExplanation
The body-centered cubic (BCC) space lattice is found in alpha-iron, tungsten, chromium, and molybdenum. This lattice structure consists of atoms arranged in a cubic lattice with an atom at the center of the cube and one at each of the eight corners. This arrangement provides stability and strength to these materials, making them suitable for various applications. The other options mentioned in the question, such as gamma-iron, aluminium, copper, lead, silver, nickel, zinc, magnesium, cobalt, cadmium, antimony, and bismuth, do not have a body-centered cubic structure.Rate this question:
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- 12.
Which of the following material has maximum ductility?
- A.
Copper
- B.
Nickel
- C.
Aluminium
- D.
Mild steel
Correct Answer
D. Mild steelExplanation
Mild steel has maximum ductility compared to copper, nickel, and aluminum. Ductility refers to the ability of a material to deform under tensile stress without breaking. Mild steel is known for its high ductility, which allows it to be easily shaped and formed into various structures. Copper, nickel, and aluminum also possess ductility, but mild steel surpasses them in terms of maximum ductility.Rate this question:
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- 13.
The ability of metal of not regaining it’s shape after the removal of deforming force is:
- A.
Ductility
- B.
Plasticity
- C.
Elasticity
- D.
Stiffness
Correct Answer
B. PlasticityExplanation
Plasticity refers to the ability of a material, in this case metal, to permanently deform and not regain its original shape after the deforming force is removed. This means that the metal will retain its new shape even if the force is no longer applied. Ductility, on the other hand, refers to the ability of a material to be stretched or drawn into a wire without breaking, while elasticity refers to the ability of a material to regain its original shape after being deformed. Stiffness refers to the resistance of a material to deformation.Rate this question:
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- 14.
The component deforming progressively under load at high temperatures is called as:
- A.
Creep
- B.
Fatigue
- C.
Resilience
- D.
All of the above
Correct Answer
A. CreepExplanation
The correct answer is "Creep". Creep refers to the gradual deformation of a material under constant stress at high temperatures. It occurs over an extended period of time and is a result of the material's internal structure rearranging itself. This phenomenon is commonly observed in materials such as metals and polymers, and it can lead to permanent deformation or failure of the component if not properly accounted for in design and engineering processes.Rate this question:
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- 15.
The rollers of a cycle chain are subjected to:
- A.
Tensile stress
- B.
Creep stress
- C.
Fatigue stress
- D.
Compressive stress
Correct Answer
C. Fatigue stressExplanation
The rollers of a cycle chain are subjected to fatigue stress. Fatigue stress is the stress that occurs when a material is subjected to repeated loading and unloading, leading to the weakening and eventual failure of the material. In the case of a cycle chain, the rollers experience repeated stress as they rotate and engage with the teeth of the gears, causing fatigue stress to build up over time. This can eventually lead to the failure of the rollers, resulting in the chain breaking or becoming ineffective.Rate this question:
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- 16.
In which of the following cases creep is an important consideration?
- A.
Cycle chains
- B.
Gas turbine blades
- C.
Steam engine flywheel
- D.
Cast iron water pipes
Correct Answer
B. Gas turbine bladesExplanation
Creep is an important consideration in the case of gas turbine blades. Creep refers to the gradual deformation of a material under constant stress over time. Gas turbine blades are subjected to high temperatures and mechanical stresses, which can cause them to deform over time if creep is not taken into account. Therefore, understanding and accounting for creep is crucial in the design and operation of gas turbine blades to ensure their structural integrity and performance.Rate this question:
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- 17.
The crystal structure of brass is:
- A.
BCC
- B.
Orthorhombic
- C.
FCC
- D.
HCP
Correct Answer
C. FCCExplanation
The correct answer is FCC (Face-centered cubic). Brass is an alloy made primarily of copper and zinc, and it has a FCC crystal structure. In a FCC structure, the lattice points are located at the corners and centers of all the faces of the unit cell. This arrangement allows for close packing of atoms and results in a highly symmetric structure. The FCC structure is commonly found in many metallic elements and alloys, including copper, aluminum, and gold.Rate this question:
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- 18.
Atomic packing efficiency of FCC lattice is __________
- A.
52%
- B.
74%
- C.
68%
- D.
50%
Correct Answer
B. 74%Explanation
The atomic packing efficiency of a face-centered cubic (FCC) lattice is 74%. This means that 74% of the total volume in the lattice is occupied by atoms, while the remaining 26% is empty space. In an FCC lattice, atoms are arranged in a close-packed structure, with each atom surrounded by 12 nearest neighbors. This arrangement allows for efficient packing of atoms, resulting in a high packing efficiency of 74%.Rate this question:
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- 19.
Metal with hexagonal close-packed structure is:
- A.
silver
- B.
Iron
- C.
Magnesium
- D.
Aluminium
Correct Answer
C. MagnesiumExplanation
Magnesium has a hexagonal close-packed (HCP) crystal structure. In this structure, the metal atoms are arranged in a close-packed pattern with each atom surrounded by six nearest neighbors forming a hexagonal shape. This arrangement allows for efficient packing of atoms, resulting in a dense and stable structure. Silver, Iron, and Aluminium do not have a hexagonal close-packed structure.Rate this question:
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- 20.
Which type of microscope is used to determine magnification in the range of 60x to 2000x linear magnification?
- A.
Optical microscope
- B.
Electron microscope
- C.
Both a and b
- D.
Unaided eyes
Correct Answer
A. Optical microscopeExplanation
An optical microscope is used to determine magnification in the range of 60x to 2000x linear magnification. This type of microscope uses visible light and lenses to magnify the sample being observed. It is commonly used in biology and other scientific fields to study small organisms, cells, and tissues. An electron microscope, on the other hand, uses a beam of electrons to magnify the sample and is capable of much higher magnification, but it is not relevant to the given range. Unaided eyes cannot achieve such high levels of magnification. Therefore, the correct answer is an optical microscope.Rate this question:
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Current Version
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Feb 05, 2024Quiz Edited by
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Aug 11, 2019Quiz Created by
Desai_milind
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