MCQ in Engineering Materials Part 9 | ECE Board Exam

This is the Multiple Choice Questions in Engineering Materials Part 9 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.

Continue Practice Exam Test Questions Part 9 of the Series

⇐ MCQ in Engineering Materials Part 8 | ECE Board Exam

Choose the letter of the best answer in each questions.

401. A large molecule with two alternating mers is known as a ________.

A. Polymer

B. Copolymer

C. Monomer

D. Elastomer

402. What term is used to describe a polymer that has rubber-like properties?

A. Elastomer

B. Thermoplastic

C. Thermoset

D. Copolymer

403. What type of steel has 0.8% carbon and 100% pearlite?

A. Low-carbon steel

B. High-carbon steel

C. Eutectoid steel

D. Alloy steel

404. Steels used for axles, gears, and similar parts requiring medium to high hardness and strength are known as ________.

A. Low-carbon steels

B. Medium-carbon steels

C. High-carbon steels

D. Alloy steels

405. Galvanized steel products are coated with ________.

A. Zinc

B. Chromium

C. Aluminum

D. Nickel

406. The use of acids to remove oxides and scale on hot-worked steels is known as ________.

A. Deoxidation

B. Pickling

C. Annealing

D. Tempering

407. What is added to compensate for the remaining high iron oxide content in steel?

A. Carbon

B. Sulfur

C. Deoxidizers

D. Manganese

408. Which of the following cast irons is a high-carbon, iron-carbon-silicon alloy?

A. White iron

B. Gray iron

C. Ductile iron

D. Malleable iron

409. Which cast iron is hard and wear-resistant?

A. Ductile iron

B. White iron

C. Gray iron

D. Malleable iron

410. What is coal that has been previously burned in an oxygen-poor environment?

A. Charcoal

B. Coke

C. Graphite

D. Anthracite

411. What is the most common reinforcement for polymer composites?

A. Carbon fiber

B. Glass fiber

C. Aramid fiber

D. Steel fiber

412. The most abundant metal in nature is ________.

A. Copper

B. Aluminum

C. Iron

D. Magnesium

413. The average ratio of stress to strain for materials operating in the nonlinear region in the stress-strain diagram is called the ________.

A. Tangent modulus

B. Elastic modulus

C. Secant modulus

D. Modulus of toughness

414. What is a combination of one or more metals with a nonmetallic element?

A. Alloy

B. Ceramic

C. Composite

D. Polymer

415. Solids in which the atoms are located in regularly defined, repeating positions throughout the structure are called ________.

A. Polymers

B. Ceramics

C. Metals

D. Amorphous solids

416. What is the basic electrical property of a material?

A. Resistivity

B. Conductivity

C. Dielectric constant

D. Impedance

417. A measure of the amount of charge that flows per unit of time in response to an applied electric field is called ________.

A. Conductance

B. Conductivity

C. Current density

D. Resistivity

418. Atoms in a metal can slip and slide past one another without regard to electrical charge constraints in response to the applied force and thus absorb the impact without breaking. This phenomenon is called ________.

A. Ductility

B. Plasticity

C. Ductile behavior of metals

D. Elastic behavior of metals

419. The most prevalent engineering metal due to the abundance of iron ore is ________.

A. Copper

B. Aluminum

C. Steel

D. Titanium

420. What subject covers the refinement of pure metals from their ores?

A. Metallurgy

B. Extractive metallurgy

C. Material science

D. Physical chemistry

421. ________ is the earth and stone mixed with the iron oxides in the extraction of iron.

A. Slag

B. Coke

C. Gangue

D. Flux

422. What alloy is composed of 40-60% copper and nickel and has high electrical resistance, making it useful in thermocouples?

A. Inconel

B. Nichrome

C. Constantan

D. Monel

423. What is the most common alloying ingredient in copper?

A. Nickel

B. Zinc

C. Tin

D. Aluminum

424. All are nickel alloys having low or zero thermal expansion used in thermostats except one. Which one?

A. Invar

B. Kovar

C. Nichivar

D. Nichrome

425. The physical property of a material that refers to the rate of heat flow per unit time in a homogenous material under steady-state conditions, per unit area, per unit temperature gradient in a direction perpendicular to the area is called ________.

A. Thermal diffusivity

B. Thermal resistance

C. Thermal conductivity

D. Heat transfer coefficient

426. The material property which refers to the deviation from edge straightness is called ________.

A. Camber

B. Warp

C. Bow

D. Waviness

427. The ability of a material to resist deterioration by chemical or electrochemical reactions with the environment is called ________.

A. Corrosion resistance

B. Hardness

C. Toughness

D. Fatigue strength

428. What is the measure of rigidity?

A. Modulus of toughness

B. Modulus of elasticity

C. Modulus of resilience

D. Proportional limit

429. What is the amount of energy required to fracture a given volume of material?

A. Impact strength

B. Ultimate strength

C. Modulus of toughness

D. Resilience

430. What is the mechanical property of a material that is time-dependent and causes permanent strain under stress?

A. Ductility

B. Elasticity

C. Creep

D. Fatigue

431. Which of the following is a natural magnet?

A. Hematite

B. Lodestone

C. Magnetite

D. Ferrite

432. What type of steel has carbon as its principal hardening agent?

A. Alloy steel

B. Stainless steel

C. Carbon steel

D. Tool steel

433. Oxidation is the loss of ________.

A. Protons

B. Neutrons

C. Electrons

D. Photons

434. The process of putting back lost electrons to convert ions back to a metal is called ________.

A. Electroplating

B. Anodizing

C. Reduction

D. Refining

435. Oxidation in an electrochemical cell always takes place where?

A. At the cathode

B. At the anode

C. At the electrolyte

D. At the terminal

436. Reduction in an electrochemical cell always takes place where?

A. At the anode

B. At the cathode

C. At the electrolyte

D. At the terminal

437. A fluid that conducts electricity is called ________.

A. Solvent

B. Electrolyte

C. Dielectric

D. Insulator

438. Alnico contains how much nickel?

A. 8%

B. 14%

C. 20%

D. 25%

439. How are materials classified?

A. Metallic and non-metallic

B. Organic and inorganic

C. Conductors and insulators

D. Magnetic and non-magnetic

440. What type of material behaves like iron when placed in a magnetic field?

A. Diamagnetic

B. Paramagnetic

C. Ferromagnetic

D. Non-magnetic

441. ________ materials are magnetically more permeable than a vacuum.

A. Ferromagnetic

B. Diamagnetic

C. Paramagnetic

D. Amorphous

442. Metallic materials are classified as ________.

A. Ferrous and nonferrous

B. Organic and inorganic

C. Conductors and insulators

D. Alloys and composites

443. The characteristics of materials such as strength, hardness, elasticity, and ductility refer to which property of materials?

A. Physical property

B. Mechanical property

C. Electrical property

D. Magnetic property

444. ________ properties of a material refer to its characteristics in the absence of external forces.

A. Physical

B. Mechanical

C. Electrical

D. Thermal

445. What is defined as a test in which all variables affecting a given property are controlled, and the property in question is measured under fixed conditions?

A. Physical test

B. Chemical test

C. Mechanical test

D. Thermal test

446. What is the deformation caused by the application of an external force?

A. Stress

B. Strain

C. Creep

D. Fatigue

447. Which of the following is NOT one of the general types of stress?

A. Shear

B. Compressive

C. Tensile

D. Torsion

448. The property of a material to regain its original shape upon the removal of an external load is called ________.

A. Plasticity

B. Elasticity

C. Ductility

D. Toughness

449. The maximum stress to which a material can be subjected without any deviation from the proportionality of stress and strain is called the ________.

A. Elastic limit

B. Yield point

C. Proportional limit

D. Ultimate strength

450. The property of a material that allows it to be drawn into a wire without breaking is called ________.

A. Ductility

B. Malleability

C. Elasticity

D. Toughness

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