MCQ in Engineering Materials Part 8 | ECE Board Exam

This is the Multiple Choice Questions in Engineering Materials Part 8 of the Series 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.

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⇐ MCQ in Engineering Materials Part 7 | ECE Board Exam

Choose the letter of the best answer in each questions.

351. The ________ of a material is a computed strength which does not bear a specific relationship to the maximum stress the material will sustain before fracture.

A. Tensile strength

B. Yield strength

C. Modulus of rupture

D. Nominal strength

352. What is another name for the bulk modulus of elasticity?

A. Elastic modulus

B. Volume modulus

C. Shear modulus

D. Young’s modulus

353. What is another name for the modulus of elasticity?

A. Young’s modulus

B. Elastic modulus

C. Rigidity modulus

D. Shear modulus

354. What type of material property refers to the behavior of materials under the application of forces?

A. Physical properties

B. Thermal properties

C. Electrical properties

D. Mechanical properties

355. The ratio of lateral strain to longitudinal strain is called ________.

A. Elastic modulus

B. Shear modulus

C. Poisson’s ratio

D. Bulk modulus

356. What is the opposite of elasticity?

A. Rigidity

B. Toughness

C. Plasticity

D. Ductility

357. ________ is the property of a material by virtue of which permanent deformation can occur.

A. Elasticity

B. Ductility

C. Plasticity

D. Toughness

358. The capacity of a material to absorb energy within the elastic range is known as ________.

A. Resilience

B. Toughness

C. Hardness

D. Rigidity

359. What is the maximum stress to which a material may be subjected before failure occurs?

A. Yield strength

B. Tensile strength

C. Ultimate strength

D. Breaking strength

360. The amount of energy per unit volume which the material will possess when subjected to elastic limit stress is called ________.

A. Modulus of toughness

B. Resilience

C. Modulus of resilience

D. Ductility

361. What refers to the quality of a material by virtue of which it may be plastically elongated?

A. Ductility

B. Toughness

C. Malleability

D. Hardness

362. ________ is defined as the stress at which the material exhibits a specified limiting permanent set.

A. Ultimate strength

B. Elastic limit

C. Yield strength

D. Breaking strength

363. What is the measure of the total energy-absorbing capacity of the material, including the energy of both elastic and plastic deformation?

A. Modulus of toughness

B. Modulus of resilience

C. Ultimate strength

D. Tensile strength

364. The property of a material by virtue of which it may be plastically compressed is called ________.

A. Ductility

B. Elasticity

C. Plasticity

D. Malleability

365. In engineering, ________ is usually defined as resistance to penetration.

A. Hardness

B. Strength

C. Toughness

D. Resilience

366. Which of the following material properties varies directly with temperature?

A. Hardness

B. Ductility

C. Toughness

D. Elasticity

367. Factor of safety is the ratio of:

A. Ultimate stress to allowable stress

B. Allowable stress to working stress

C. Working stress to ultimate stress

D. Yield strength to elastic limit

368. ________ is the kind of stress below which failure will not take place.

A. Tensile stress

B. Allowable stress

C. Shear stress

D. Ultimate stress

369. A combination of elements that possess metallic properties is called ________.

A. Alloy

B. Ceramic

C. Composite

D. Polymer

370. The science that deals with the preparation and application of metals and alloys is known as ________.

A. Mineralogy

B. Metallurgy

C. Crystallography

D. Thermodynamics

371. Steel is an alloy of ________.

A. Iron and sulfur

B. Iron and carbon

C. Iron and silicon

D. Iron and aluminum

372. What is the most undesirable element commonly found in steel?

A. Phosphorous

B. Carbon

C. Sulfur

D. Oxygen

373. What physical property of a material refers to the point at which a material liquefies on heating or solidifies on cooling?

A. Boiling point

B. Melting point

C. Hardness

D. Ductility

374. What is the ratio of the velocity of light in a vacuum to its velocity in another material?

A. Refractive index

B. Modulus of elasticity

C. Poisson’s ratio

D. Specific gravity

375. What alloy has high electrical resistance, high corrosion resistance, and high strength at red heat temperatures, making it useful in resistance heating?

A. Brass

B. Nichrome

C. Bronze

D. Stainless steel

376. What element is added to nickel to improve its electrical and magnetic properties?

A. Chromium

B. Iron

C. Copper

D. Zinc

377. There are 14 different three-dimensional crystalline structures known as ________.

A. Unit cells

B. Bravais lattices

C. Amorphous lattices

D. Crystal grids

378. The smallest repeating unit of a Bravais lattice is known as ________.

A. Crystal grain

B. Unit cell

C. Molecule

D. Microstructure

379. ________ are different atomic arrangements of the same atom.

A. Allotropes

B. Isotopes

C. Polymers

D. Crystals

380. ________ are noncrystalline substances that have neither definite form nor structure.

A. Ceramics

B. Metals

C. Amorphous substances

D. Polymers

381. The electrical and magnetic characteristics of materials are greatly influenced by ________.

A. Atomic mass

B. Valence electrons

C. Density

D. Crystal structure

382. What is the relative permeability of ferromagnetic materials?

A. Less than 1

B. Equal to 1

C. Much greater than 1

D. Negative

383. Iron is ________ above its Curie temperature.

A. Ferromagnetic

B. Nonmagnetic

C. Diamagnetic

D. Paramagnetic

384. “Magnetic susceptibilities of most paramagnetic materials are inversely proportional to their absolute temperatures” is known as ________.

A. Curie-Weiss law

B. Faraday’s law

C. Curie law

D. Maxwell’s equation

385. A material can fail after repeated stress loadings even if the stress level never exceeds the ultimate strength, a condition known as ________.

A. Fracture

B. Fatigue failure

C. Creep

D. Resilience

386. The ratio of material strength to the factor of safety is called ________.

A. Working stress

B. Yield strength

C. Allowable stress

D. Ultimate stress

387. The simplest and most common grade of steel is ________.

A. Alloy steel

B. Stainless steel

C. Carbon steel

D. Tool steel

388. What refers to the reference sheet for the elements that can be used to form engineering materials?

A. Bravais lattice

B. Periodic table

C. Crystal structure

D. Phase diagram

389. ________ are crystalline materials, usually compounds formed with strong covalent or ionic bonds between atoms.

A. Ceramics

B. Metals

C. Polymers

D. Alloys

390. The electrical property of a material can also be considered as a ________ property.

A. Mechanical

B. Physical

C. Chemical

D. Thermal

391. What is the outermost fiber stress developed when a material is loaded as a simply supported beam and deflected to a certain value of strain?

A. Shear stress

B. Flexural stress

C. Tensile stress

D. Compressive stress

392. What refers to the time-dependent permanent strain under stress?

A. Elasticity

B. Fatigue

C. Creep

D. Ductility

393. What is another term for the “fatigue strength” of the material?

A. Yield strength

B. Ultimate strength

C. Endurance limit

D. Elastic limit

394. Polymer comes from the Greek words “poly,” meaning “many,” and “meros,” meaning ________.

A. Unit

B. Bond

C. Part

D. Chain

395. Who is accepted as the author of the periodic table, developed by chemists in the mid-19th century?

A. Bohr

B. Mendeleev

C. Rutherford

D. Dalton

396. 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 controlled conditions?

A. Moisture content

B. Water absorption

C. Permeability

D. Hygroscopicity

397. 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 by 1 degree to the heat required to raise the same mass of water by 1 degree?

A. Thermal capacity

B. Specific heat

C. Thermal conductivity

D. Heat transfer coefficient

398. What typical penetrator is used in the Brinell hardness test?

A. 5 mm cone

B. 10 mm ball

C. Diamond point

D. Steel pin

399. What is the ratio of the maximum load in a tension test to the original cross-sectional area of the test bar?

A. Yield strength

B. Ultimate strength

C. Tensile strength

D. Flexural strength

400. Some polymeric materials, such as epoxies, are formed by strong primary chemical bonds called ________.

A. Covalent bonding

B. Ionic bonding

C. Cross-linking

D. Hydrogen bonding

Online Questions and Answers in Engineering Materials Series

Following is the list of multiple choice questions in this brand new series:

Complete List of MCQs in General Engineering and Applied Science per topic