This is the Multiples Choice Questions Part 6 of the Series in Engineering Materials as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.
Online Questions and Answers in Engineering Materials Series
Following is the list of multiple choice questions in this brand new series:
Continue Practice Exam Test Questions Part VI of the Series
Choose the letter of the best answer in each questions.
251. What property of an element is determined by the number of protons in its nucleus?
- a. Atomic weight
- b. Atomic number
- c. Isotopes
- d. Atomic Mass unit
252. What are considered as the building blocks for engineering materials?
- a. Atoms
- b. Elements
- c. Compounds
- d. Matter
253. What refers to a metal combined with one or more other elements?
- a. Mixture
- b. Compound
- c. Alloy
- d. Molecule
254. What do you call metals reinforced by ceramic or other materials usually in fiber form?
- a. Metalloids
- b. Matrix Alloys
- c. Metal Lattices
- d. Metal Matrix Composites
255. The engineering materials known as “plastics” are more correctly called
- a. Polyvinyl Chloride
- b. Polymers
- c. Polyethylene
- d. Mers
256. What is a combination of two or more materials that has properties that the components material do not have by themselves?
- a. Compound
- b. Composite
- c. Mixture
- d. Matrix
257. What physical property of a material that refers to the point at which a material liquefies on heating or solidifies on cooling?
- a. Melting point
- b. Curie Point
- c. Refractive index
- d. Specific heat
258. What physical property of a material that refers to the temperature at which ferromagnetic materials can no longer be magnetized by outside forces?
- a. Melting point
- b. Curie Point
- c. Refractive index
- d. Specific heat
259. What physical property of a material refers to the amount of weight gain (%) experienced in a polymer after immersion in water for a specified length of time under a controlled environment?
- a. Dielectric strength
- b. Electric Resistivity
- c. Water Absorption
- d. Thermal conductivity
260. What physical property of material refers to the rate of heat flow per unit time in a homogeneous material under steady state conditions per unit area, unit temperature gradient in a direction perpendicular to the area?
- a. Thermal expansion
- b. Thermal conductivity
- c. Heat distortion temperature
- d. Water absorption
261. What is the absolute value of the ratio of the transverse strain to the corresponding axial strain in a body subjected to uniaxial stress?
- a. Poisson’s Ratio
- b. Euler’s Ratio
- c. Refractive index
- d. Dielectric index
262. What physical property of a material refers to the highest potential difference that an insulating material of a given thickness can withstand for a specified time without occurrence of electrical breakdown through its bulk?
- a. Thermal expansion
- b. Conductivity
- c. Dielectric Strength
- d. Electric Resistivity
263. What physical property of a material refers to the ratio of the amount of heat required to raise the temperature of a unit mass of a substance 1 degree to the heat required to raise the same mass of water to 1 degree?
- a. Specific Heat
- b. Latent Heat
- c. Heat of Fusion
- d. Heat of Fission
264. What refers to the heat needed to change the temperature of the substances without changing its phases?
- a. Latent heat
- b. Sensible heat
- c. Specific heat
- d. entropy
265. What physical property of a material refers to the temperature at which a polymer under a specified load shows a polymer under a specified load shows a specified amount of deflection?
- a. Curie temperature
- b. Specific Heat
- c. Heat Distortion Temperature
- d. Thermal Conductivity
266. What mechanical property of a material refers to the nominal stress at fracture in a tension test at constant load and constant temperature?
- a. Creep strength
- b. Stress rapture strength
- c. Compressive yield strength
- d. Hardness
267. What mechanical property of a material refers to the resistance to plastic deformation?
- a. Rigidity
- b. Plasticity
- c. Ductility
- d. Hardness
268. What is obtained by repeatedly loading a specimen at given stress levels until it fails?
- a. Elastic Limit
- b. Endurance limit or fatigue strength of material
- c. Creep
- d. All of these
269. What dimensional property of a material refers to the deviation from edge straightness?
- a. Lay
- b. Out of Flat
- c. Camber
- d. Waviness
270. What dimensional property of a material refers to a wave like variation from a perfect surface, generally much wider in spacing and in higher in amplitude than surface roughness?
- a. Lay
- b. Waviness
- c. Surface finish
- d. Out of flat
271. Wood is composed of chains of cellulose molecules bonded together by another natural polymer called
- a. Plastic
- b. Lignin
- c. mer
- d. additive
272. What is a polymer production process that involves forming a polymer chain containing two different monomers?
- a. Copolymerization
- b. Blending
- c. Alloying
- d. Cross-linking
273. What is the generic name of a class of polymer which is commercial known as nylon?
- a. Polyacetals
- b. Polyamide
- c. Cellulose
- d. Polyester
274. What is a method of forming polymer sheets or films into three-dimensional shapes, in which the sheets is clamped on the edge, heated until it soften and sags, drawn in contact with the mold by vacuum, and cooled while still in contact with the mold?
- a. Calendering
- b. Blow molding
- c. Thermoforming
- d. Solid phase forming
275. What is a process of forming continuous shapes by forcing a molten polymer through a metal die?
- a. Calendering
- b. Thermoforming
- c. Lithugraphy
- d. Extrusion
276. What chemical property of a material which refers to its ability to resist deterioration by chemical or electrochemical reactions with environment?
- a. Stereospecificity
- b. Corrosion resistance
- c. Conductivity
- d. Electrical Resistance
277. What refers to the tendency for polymers and molecular material to form with an ordered spatial, three-dimensional arrangement of monomer molecules?
- a. Stereospecificity
- b. Corrosion resistance
- c. Retentivity
- d. Spatial Configuration
278. What is the ratio of the maximum load in a tension test to the original cross-sectional area of the test bar?
- a. Tensile strength
- b. Yield strength
- c. Shear strength
- d. Flexual strength
279. What is the ratio of stress to strain in a material loaded within its elastic range?
- a. Poisson’s ratio
- b. Refractive index
- c. Modulus of elasticity
- d. Percent elongation
280. What is measure of rigidity?
- a. Stiffness
- b. Hardness
- c. Strength
- d. Modulus of elasticity
281. The greatest stress which a material is capable of withstanding without deviation from acceptable stress to strain is called
- a. elongation
- b. proportional limit
- c. yield point
- d. elastic limit
282. What refers to the stress at which a material exhibits a specified deviation from proportionality of stress and strain?
- a. Tensile strength
- b. Shear strength
- c. Yield strength
- d. Flexural strength
283. What is the amount of energy required to fracture a given volume of material?
- a. Impact strength
- b. Endurance limit
- c. Creep strength
- d. Stress rupture strength
284. What mechanical property of a material which is a time-dependent permanent strain under stress?
- a. elongation
- b. elasticity
- c. creep
- d. rupture
285. In tensile testing, the increase in the gage length measured after the specimen fractures within the gage length is called
- a. Percent elongation
- b. Creep
- c. Elasticity
- d. Rupture
286. What is the resistance of a material to plastic deformation?
- a. Hardness
- b. Creepage
- c. Stiffness
- d. Rigidity
287. What is the maximum stress below which a material can theoretically endure an infinite number of stress cycles?
- a. Endurance state
- b. Endurance test
- c. Endurance limit
- d. Endurance strength
288. What is a substance that attracts piece of iron?
- a. Conductor
- b. Semiconductor
- c. Magnet
- d. All of the choices
289. Which of the following is a natural magnet?
- a. Steel
- b. Magnesia
- c. Lodestone
- d. Soft iron
290. Which of the following material has permeability, slightly less than that of free space?
- a. Paramagnetic materials
- b. Non-magnetic materials
- c. Ferromagnetic materials
- d. Diamagnetic materials
291. What materials has permeabilities slighter greater than that of free space?
- a. Paramagnetic materials
- b. Non-magnetic materials
- c. Ferromagnetic materials
- d. Diamagnetic materials
292. Which of the following materials have very high permeabilities?
- a. Paramagnetic materials
- b. Non-magnetic materials
- c. Ferromagnetic materials
- d. Diamagnetic materials
293. What is ASTM test for tension is designated for plastics?
- a. A370
- b. D638
- c. E292
- d. C674
294. What is ASTM test for compression is designated for plastics?
- a. D638
- b. D695
- c. D790
- d. D732
295. What is ASTM test for shear strength is designated for plastics?
- a. D732
- b. D790
- c. D695
- d. D638
296. What is the ASTM tension testing designation for standard methods of steel products?
- a. A370
- b. E345
- c. E8
- d. C674
297. What do you call a polymer without additive and without blending with another polymer?
- a. Homopolymer
- b. Ethenic polymer
- c. Polyethylene
- d. Copolymer
298. A large molecule with two alternating mers is known as
- a. monomer
- b. elastomer
- c. mers
- d. copolymer or interpolymer
299. What term is used to describe a polymer that has rubberlike properties?
- a. Vulcanizer
- b. Elasticmer
- c. Polychloroprene
- d. Elastomer
300. What is defined as an alloy of iron and carbon, with the carbon being restricted within certain concentration limits?
- a. Steel
- b. Wrought iron
- c. Cast Iron
- d. Tendons
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