Mechanical Engineering Objective Questions Book Pdf

[Edilma Howard]

QIs there any advantage to applying to the M.S. program if I am interested in obtaining a Ph.D.?

A: If your interest in pursuing Ph.D. is high, then you should apply directly to the Ph.D. program. If you feel that you are more likely to decide to earn an M.S. only, then you should apply to the M.S. program.

Q: Can I transfer from the M.Eng. program to the M.S. or Ph.D. program?

A: Transferring from M.Eng. to M.S. is possible, but is not the standard path on account of the differences between the two degree programs. Applications for a transfer to M.S. to M.Eng. will only be considered for current students.

Q: Where do I apply?

A: Please use the APPLY button on this or any other page in the Prospective Graduate section of this website. It will take you to our Graduate Admissions Application system where you will set up an account.

Q: What is the timing for applications?

A: Application deadlines are listed here. Initial decisions are made by March 1, and all decisions are complete by April 15. Students must notify BU of their acceptance decision by April 30.

Q: What are the degree requirements for an M.S. and what courses are required to complete this degree program?

A: Please consult the MS in Mechanical Engineering Program or the MS/MBA in Product Design & Manufacture.

Q: What are the degree requirements for the M.Eng. and what courses are required to complete this degree program?

A: Please consult the MS in Mechanical Engineering Program or the MS/MBA in Product Design & Manufacture.

Q: Is there anyone I can contact about additional questions I have?

A: Please contact the Academic Programs Manager, Seth Robertson, in the Department of Mechanical Engineering with any additional questions you may have.

Q: Can I study towards a graduate degree in Mechanical Engineering while living outside the greater Boston area?

A: Yes. The Department of Mechanical Engineering offers a distance learning option for the Master of Engineering degree. For more information about this program, please visit our Distance Learning Program.

Q: Can I transfer in previous graduate coursework to count towards my degree requirements?

A: Yes, you may petition to transfer up to 8 academic credits of comparable graduate coursework, which will be counted towards your degree requirements.

Q: Can I take graduate-level engineering courses prior to applying to the graduate engineering program?

A: Yes. As a non-degree student, you are able to enroll in graduate-level coursework on a space-available basis. A maximum of three courses taken at Boston University as a non-degree student may be applied to a graduate degree. For more information, please visit the webpage here.

The mission of the Mechanical Engineering Department is to provide students with a strong foundation in mechanical engineering, to instill a systematic approach to problem solving, to prepare students for leadership and innovation by emphasis on independent thinking as well as teamwork, and to promote a keen awareness of the role of engineering in a modern society.

The Mechanical Engineering (B.S.) program is accredited by the Engineering Accreditation Commission of ABET, , under the General Criteria and Program Criteria for Mechanical and Similarly Named Engineering Programs.

Graduates will demonstrate intellectual curiosity as they continually learn new concepts and tackle new challenges and opportunities. Graduates will identify new directions and adapt in response to the needs of an evolving, professional and social environment.

Our top 50 Mechanical Engineering questions and answers focus on all the areas of this subject. It covers over more than 50 topics in Mechanical Engineering. Anyone who wishes to sharpen their knowledge, preparing for the interviews, or preparing for the entrance exam can practice these Mechanical Engineering Questions.

Description: Generally, metals exist in crystalline form. The ceramic compound-silica (SiO2), can exist either in a crystalline form or in a non-crystalline form (amorphous form). Silica's non-crystalline (amorphous) form is just called silica glass.

Description: Iron and nickel, metals, possess a crystalline form, whereas high-density polyethylene (HDPE) and low-density ethylene (LDPE) are a class of polymers. These thermoplastics are semi-crystalline, out of which LDPE exhibits a crystallinity of about 50-60% and HDPE of about 90%. Some people may term HDPE as crystalline, but it is more appropriate to restrict it in the category of semi-crystalline class.

Description: ASTM stands for American Society for Testing and Materials. ASTM develops technical standards for a wide range of materials products. American Society for Tensile Measurement is used to decide various standards in tensile measurement.

Description: Mohs hardness scale was developed by "Frederich Mohs" in 1822, a chart that denotes the various materials' relative hardness (1-softest to 10-hardest). According to the Mohs scale, diamond is the hardest material, and talc is the softest material.

Description: Fine grinding involves using abrasive silicon carbide to get a flat surface, i.e., nearly free of the disturbed or deformed scratches introduced in the previous sample preparation step.

Description: Finer the grain size (lower the grain size), more is the number of grain boundaries. Thus more is the yield strength; thus, more is the flexibility. This is the reason why we can easily draw a fine-grained structure into wires.

Description: In a liquid penetration test, either petroleum-or-water-based carrier fluids are used as solvents or cleaners according to the type of penetrant used. The petroleum-based carrier fluid is a penetrating liquid in a liquid penetration test and fluorescent red color dye for visible light.

Description: Binary phase diagrams are based on two-component systems. Here, the two components may be mixed in an infinite number of different proportions, which indicates that composition also becomes a variable, along with pressure and temperature. The iron-carbon phase diagram, Pb-Sn diagram are the best examples of this category.

Description: A mushy zone is nothing but a solid-liquid mix in a two-phase region. The alloys or reactions, which exhibit lower melting points than the two pure metals, are known as eutectic alloy systems taking eutectic reactions that do not exhibit mushy zone.

Description: Cast irons are the alloy of iron and carbon that contains 2.1 to 4.3% C, along with other varying amounts of silicon and manganese. This varying carbon range makes them easily castable, asking them to call cast irons.

Description: The cupola furnace (a modified blast furnace) can melt cast irons, bronzes, etc. Cast irons have a carbon content of 2-4% and have low melting temperatures, making them easily castable.

Description: Vanadium is the most used grain refiner in steel. It forms a microscopic precipitate particle in steel, which acts as pinning agents, thus obstruct grain growth at higher temperatures, encouraging new grains to nucleate.

Description: Martensite is the hardest constituent of steel. The primary reasons for the internal strains within BCC iron are the excess of carbon and the plastic deformation of parent FCC iron surrounding the martensitic plate. The cooling rate and the amount of carbon in steel are directly proportional to the hardness achieved in martensitic transformation.

Description: Pure iron possesses either BCC or FCC crystal structure as its temperature increases from room temperature to its melting point. At room temperature to 910 C, it has BCC, between 910 C and 1410 C it has face-centered cubic, and from 1410 C to its melting point (1539 C), it returns to its BCC crystal structure.

Description: Visual inspection is a type of non -destructive testing technique that provides a means of detecting and examining the variety of surface flaws, such as surface finish, discontinuities, and surface cracks on the castings. This method is very cheap and widely used because most surface defects and roughness can be easily observed.

Description: In the LPT method, the objective is accomplished by entrapment of the inspection liquid by the flaws followed by visual inspection of the surface under ultraviolet light (when using a fluorescent penetrant), and for visible dye penetrant normal light can be used for the inspection process.

Description: When the liquid penetrant test is used for aluminum ingots, before the test, the surfaces of the aluminum ingots are prepared or treated with the acid pickle. This process is known as acid pickling, and it is recommended in preference to all other processes like caustic etching, machining, etc.

Description: The dye penetrant inspection method is mainly used to detect invisible surface defects in a nonmagnetic casting. The casting is cleaned by brushing, and then spraying or dipping of the casting is done into a dye containing a fluorescent material. Then for inspection, casting is dried and viewed in the darkness that reveals the discontinuities in the surface.

Description: In the ultrasonic inspection, a beam of high-frequency sound waves is introduced into the material to detect interior flaws in the material. The sound wave travels through the material with some loss of energy and is reflected at the interfaces. It will be further analyzed to define the presence and location of flaws in the casting.

Description: The subjects taking the MFFT, the subjects were then classified into four categories, namely, fast-accurates, reflectives, impulsive and slow-inaccurate. Slow-accurates were not one of the classifications.

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