This is the Multiples Choice Questions Part 7 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 VII 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
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