TOP MECHANICS

Source: Machinery's Handbook Topic: Materials and Processes 1.______is a number indicating how many times a certain volume of a material is heavier than an equal volume of water a.specific ratio b.density c.Specific gravity d.Avogadro's Number 2._______an instrument for determining the density of liquids, provided with graduations made to an arbitrary scale a.hygrometer b.hydrometer c.weighing scale d.sphygmomanometer 3. Stainless steels generally contain at least _______ chromium, with or without other elements a.40% b.30% c.20% d.10% 4.______ is type of stainless steel that is nonmagnetic in the annealed condition, although some may become slightly magnetic after cold working a.austenitic b.hematite c.martensitic d.ferritic 5. ______ grades of stainless steel are always magnetic and contain chromium but no nickel. a.austenitic b.hematite c.martensitic d.ferritic 6. _______ grades of stainless steel are magnetic and can be hardened by qu

Source: Machinery's Handbook Topic: Strength of Materials, Springs and Wire Ropes Answers in RED. 1. These washer type springs can sustain relatively large loads with small deflections, and the loads and deflections can be increased by stacking the springs. a. Volute springs b. Torsion bars c. Belleville d. Flat springs 2. These springs are often used on army tanks and heavy field artillery, and seldom find additional uses because of their high cost, long production time, difficulties in manufacture, and unavailability of a wide range of materials and sizes a. Volute springs b. Torsion bars c. Belleville d. Flat springs 3. These springs are often used to overcome operating space limitations in various products such as electric switches and relays. a. Volute springs b. Torsion bars c. Belleville d. Flat springs 4.The ______ of a wire rope is the direction of the helical path in which the strands are laid and, similarly, the lay of a strand is the direction of

Mechanical Board Exam Questions from Machinery's Handbook. Topic: Machine Design : Strength of Materials 1.______ is the amount by which a dimension of a body changes when the body is subjected to a load, divided by the original value of the dimension a. stress b. unit strain c. modulus of resilience d. modulus of elasticity 2.______is the maximum stress to which a test specimen may be subjected and still return to its original length upon release of the load. a. elastic limit b. rupture point c. yield point d. elastic limit 3. _______ is the ratio of unit stress to unit strain within the proportional limit of a material in tension or compression. a. Modulus of Elasticity b. Modulus of Resilience c. Strain d. unit strain 4._______is the ratio of lateral strain to longitudinal strain for a given material subjected to uniform longitudinal stresses within the proportional limit. a. Poisson's ratio b. unit stress c. strain d. Young's modulus of elast

During college, we solve a lot of problems. Mathematics, physics, machine design and thermodynamics were just a few examples. The good thing about these problems is that usually: 1. All needed information and parameters were given. All you have to do is to solve it using formulas and equations. 2. We are sure that the question has an answer. Image via Wikipedia 3. When you already find the correct answer, the problem is done. That’s the good thing about solving problems theoretically. But when it comes to the actual work, everything is completely different. Some actual problems in the work are: PIPING: “the pressure on a particular pipe is usually high” MANUFACTURING: “the dimension of the parts coming out of the machine is off-spec” FARMING: “the crops do not yield good fruits.” EDUCATION: “the students’ score dropped dramatically” In contrast to college problems, actual work problem are one or all of the following. 1. There’s none or insufficient information or pa

As promised on the previous articles, I prepared some materials for the upcoming Mechanical Engineering Board Exam. I hope this one will help. Update: Answers in red . Questions from the Philippine Mechanical Code (PSME Code) 1. As a requirement for permit application, for any installation involving machine, mechanical equipment, general layout plan for each floor drawn should not be less than a. 1:200 b. 1:500 c. 1:1000 d. 1:100 2. Standard sheet sizes for mechanical plans and drawings shall be based on a width to length ratio of a. 1: sqrt (2) b. 1:sqrt(3) c. 1:3 d. 1:2 3. For commercial and industrial buildings, work rooms (referring to maintenance shop and machine room) shall be at least _______ height from floor to ceiling. a. 3 000 mm b. 2 000 mm c. 5 000 mm d. 4 000 mm 4. For guyed steel stacks, the angle between the stack and guy wire is usually a. 30º b. 45 º c. 60 º d. 75 º 5. It is a heavy wheel which by its inertia assists in securing uniform motion