MCQ in Engineering Materials Part 7 | ECE Board Exam

This is the Multiples Choice Questions in Engineering Materials Part 7 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 7 of the Series

Choose the letter of the best answer in each questions.

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

a. Alloy steel

b. Stainless steel

c. Galvanized steel

d. Carbon steel

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

a. Austenite

b. Eutectoid

c. Hyper-eutectoid

d. Stainless steel

303. Galvanized steel are steel products coated with

a. Carbon

b. Sulfur

c. Zinc

d. Nickel

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

a. Tempering

b. Picking

c. Machining

d. Galvanizing

305. What do you call tin mill steel without a coating?

a. White plate

b. Tin steel free

c. Black plate

d. Dechromate tin

306. What combination of elements has high electrical resistance high corrosion resistance and high strength at red heat temperature making it useful in resistance heating?

a. Aluminum bronze

b. Nichrome

c. Hastelloy

d. Alnico

307. A steel cannot qualify for stainless prefix until it has at least how many percent of Chromium?

a. 10%

b. 20%

c. 25%

d. 5%

308. What do you add to compensate for the remaining high iron-oxide content of the steel?

a. Deorizers

b. Deoxidizers

c. Deterrent

d. Detoxifiers

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

a. Gray iron

b. Malleable iron

c. White iron

d. Ductile iron

310. Which of the following cast irons is a heat-treated for ductility?

a. Gray iron

b. Malleable iron

c. White iron

d. Ductile iron

311. Which cast iron is hard and wear resistant?

a. Gray iron

b. Malleable iron

c. White iron

d. Ductile iron

312. What is considered as the general purpose, oldest type and widely used cast iron?

a. Gray iron

b. Malleable iron

c. White iron

d. Ductile iron

313. What is the advantage of quench hardening?

a. Improved strength

b. Hardness

c. Wear characteristics

d. All of the choices

314. What is the lowest-temperature diffusion hardening process and does not require a quench?

a. Carburizing

b. Tempering

c. Nitriding

d. Heat-treating

315. Which of the following is a requirement for hardening a steel?

a. Heating at proper temperature

b. Sufficient carbon content

c. Adequate Quench

d. All of the choices

316. What field of study encompasses the procurement and production of metals?

a. Metallurgy

b. Geology

c. Material Science

d. Metalgraphy

317. What do you call earth and stone mixed with the iron oxides?

a. Hematite

b. Magnetite

c. Gangue

d. Ore

318. What is a coal that has been previously burned in an oxygen poor environment.

a. Tuyene

b. Coke

c. Diamond

d. Hematite

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

a. Brass

b. Nickel

c. Zinc

d. Aluminum

320. What refers to the case hardening process by which the carbon content of the steel near the surface of a part is increased?

a. Carburidizing

b. Annealing

c. Normalizing

d. Martempering

321. What is the most undesirable of all the elements commonly found in steels?

a. Sulfur

b. Phosphorus

c. Silicon

d. Manganese

322. What impurity in steel can cause “red shortness”, which means the steel becomes unworkable in high temperature?

a. Sulfur

b. Silicon

c. Manganese

d. Phosphorus

323. What is the process of producing a hard surface in a steel having sufficiently high carbon content to respond to hardening by rapid cooling of the surface?

a. Cyaniding

b. Nitriding

c. Flame hardening

d. Induction hardening

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

a. Boron

b. Ceramic

c. Graphite

d. Glass Fiber

325. In electrochemistry, oxidation is a lost of

a. Ion

b. Electron

c. Proton

d. Anode

326. What is the process of putting back the lost electrons to convert the ion back to metal?

a. Oxidation

b. Corrosion

c. Reduction

d. Ionization

327. What do call a fluid that conducts electricity?

a. Electrolyte

b. Water

c. Solution

d. Acid

328. What is defined as a local corrosion damaged characterized by surface cavities?

a. Cracking

b. Pitting

c. Cavitation

d. Erosion

329. What do you call the removal of zinc from brasses?

a. Dezincification

b. Graphitization

c. Stabilization

d. Dealloying

330. What is the scaling off a surface in flakes or layers as the result of corrosion?

a. Expoliation

b. Corrosion Fatigue

c. Scaping

d. Fretting

331. What refers to a shape achieved by a allowing a liquid to solidify in a mold?

a. Casting

b. Molding

c. Forming

d. All of the choices

332. What Cast Iron has nodular of spheroidal graphite?

a. Ductile iron

b. Wrought Iron

c. Gray Iron

d. White Iron

333. What is a process for making glass-reinforced shapes that can be generated by pulling resin-impregnated glass strands through a die?

a. Continuous pultrusion

b. Bulk molding

c. Vacuum bag forming

d. Resin transfer molding

334. What is a natural substance that makes up a significant portion of all plant life?

a. Cellulose

b. Polyacetal

c. Polycarbonates

d. Polyimides

335. What term is used to denote a family of thermosetting polymers that are reaction products of alcohols and acids?

a. Alkaline

b. Alkydes

c. Alcocids

d. Aldehyde

336. What refers to the application of any process whereby the surface of steel is altered so that it will become hard?

a. Carburizing

b. Casehardening

c. Annealing

d. Surface hardening

337. What is the chief ore of tin?

a. Cassiterite

b. Bauxite

c. llmanite

d. Galena

338. What is the chief ore of zinc

a. Cassiterite

b. Bauxite

c. Sphalerite

d. Galena

339. What is the chief ore of titanium?

a. Cassiterite

b. Bauxite

c. llmanite

d. Galena

340. What is a mixture of gibbsite and diaspore of which aluminum is derived?

a. Bauxite

b. Rutile

c. Galena

d. Sphalerite

341. The term bronze is used to designate any alloy containing

a. Copper and zinc

b. Aluminum and iron

c. Copper and aluminum

d. Copper and tin

342. The term brass is used to designate an alloy containing

a. Copper and zinc

b. Aluminum and iron

c. Copper and aluminum

d. Copper and tin

343. What is the most abundant metal in nature?

a. Aluminum

b. Steel

c. Iron

d. Copper

344. What steel relief process is used with hypoeutectoid steels to change martenite into pearlite?

a. Tempering

b. Normalizing

c. Annealing

d. Spheroidizing

345. The Portland cement is manufactured from the following elements except

a. lime

b. silica

c. alumina

d. asphalt

346. What is another term for Tempering?

a. Recrystallization

b. Annealing

c. Spheroidizing

d. Drawing or toughening

347. All are steel surface hardening processes except

a. Carburizing

b. Flame Hardening

c. Nitriding

d. Annealing

348. The pressure which a substances is capable of supporting without fracturing

a. Shear Stress

b. Yield Strength

c. Yield Stress

d. Shear Modulus

349. The dimensionless parameter describing deformation

a. Energy

b. Work

c. Strain

d. Stress

350. The general law of mechanics that stress is directly proportional to strain

a. Mean Speed Theorem

b. Poisson Ratio

c. Charles’ Theorem

d. Hooke’s Law

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