TOP MECHANICS

I have put here part of my compilation of past board examination on the subject Industrial and Power Plant Engineering. These questions are modified for the purpose of improvement. Answers (and probably solutions) will be posted here soon.

1. An automobile tire is inflated to 32psig pressure at 50 degree F. After being driven, the temperature rises to 75 degree F. Determine the final gage pressure assuming the volume remains constant. (Electrical Engineering Board Exam Problem)
a. 34.3psig
b. 49 psig
c. 19.6 psig
d. 32.3 psig




2. Four hundred cubic centimeters of gas at a pressure of 740 mmHg absolute and temperature of 18 degree C undergoes a process until the pressure and temperature becomes 760 mmHg absolute and 0 degrees C respectively. Calculate the final volume of the gas. (Electrical Engineering Board Exam Problem)
a. 351 cc
b. 371 cc
c. 365 cc
d. 375 cc

The following are the solutions and answers to MODIFIED PAST MECHANICAL BOARD EXAM QUESTION: Machine Design Set-1 posted on this blog last Saturday, November 14, 2009.




Again, I want to stress out that most of the questions here are modified from its original form for the purpose of improving the question.

Past Mechanical Engineering Board Exam Question Number 1
A 4 inches diameter short shaft carrying 2 pulleys close to the bearings transmits how much horsepower if the shaft makes 120 rpm.

A.200HP               B. 199 HP

C.198 HP              D. 202 HP

P = (D3N )/38 -- for mula for short shafts from PSME code

P = (4)3(120)/38

P= 202 HP

Past Mechanical Engineering Board Exam Question Number 2
An instrument that measures the hardness of the work piece in terms of elasticity.

a. Durometer

b. Scleroscope

c. Mohs's Scale

d. Brinell Tester

Source: Machinery’s Handbook

In line with the goal of to share informations that can help our fellow mechanical engineers, I wrote this article about free softwares that can be very useful.




Free CAD softwares

Co-Create
It was first developed by Hewlett-Packard Mechanical Design Division and acquired by Parametric Technology Corporation (maker of Pro-Engineering Software) on late 2007. It offers FREE personal edition that can be downloaded on its website. All you have to do is to register with a valid email address.
Link to the download page.

Alibre
Alibre Inc., offers a FREE light version of their commercial CAD software. Just sign-up using a valid email adress to download the installer.
Link to download page.

T-Flex
Top Systems, a Russian developer of CAD/CAD/CAE/PDM solutions offers a student version of their commercial CAD package T-Flex for FREE.
Link to Download page.




Mind Mapping software

Free Mind
Sourceforge, an organization promoting open-source sofwares created Freemind, a mind mapping software. This can be us…

The questions below are BASED on the past board examinations given by the board of mechanical engineering. Also, please take note that some of the questions are intentionally varied for the purpose of improving them. Answers (and probably the solutions) will be given a few days after.



Past Mechanical Engineering Board Exam Question Number 1
A 4 inches diameter short shaft carrying 2 pulleys close to the bearings transmits how much horsepower if the shaft makes 120 rpm.
A.200HP             B. 199 HP
C.198 HP            D. 202 HP

Past Mechanical Engineering Board Exam Question Number 2
An instrument that measures the hardness of the workpiece in terms of elasticity.
a. Durometer
b. Scleroscope
c. Mohs's Scale
d. Brinell Tester

Past Mechanical Engineering Board Exam Question Number 3
A cylindrical tank with 15 in inside diameter contains oxygen gas at 3000 psi. Calculate the required wall thickness in (mm) under stress of 25,000 psi.
A.11.44mm               B. 22.86mm
C.15.36mm         …

ARTICLE V

PENAL AND CONCLUDING PROVISIONS

Sec. 42. Penalties. – In addition to the administrative sanctions imposed under this Act any person who violates any of the provisions of this Act and its rules and regulations shall, upon conviction be penalized by a fine of not less than Fifty thousand pesos (P50,000.00) nor more than Two hundred thousand pesos (P200,000.00), or imprisonment of not less than six (6) months nor more than three (3) years, or both fine and imprisonment at the discretion of the court.

Section 43. Implementing Rules and Regulations. – The Board shall formulate and issue the implementing rules and regulations to carry out the provisions of this Act.




Section 44. Funding Provisions. – Such sums may be necessary to carry out provisions of this Act shall be included in the General Appropriations Act of the year following its enactment into law and thereafter.


Section 45. Separability Clause. – If any section or portion of this Act shall be declared unconstitutional or inv…

ARTICLE IV
PRACTICE OF THE PROFESSION
Section 33. Field of Action Authorized for Each Category: Prohibition. – It shall be unlawful for any person, unless authorized under this Act:







(a) to be in responsible charge of the preparation of plans, designs, investigations, valuation, technical reports, specifications, project studies or estimates or to be in performance of other professional mechanical engineering activities unless he is a duly licensed Professional Mechanical Engineer.

(b) to teach professional subjects in mechanical engineering course unless he is a duly licensed Professional Mechanical Engineer, or a Master's degree, or Doctorate degree holder in mechanical engineering.

(c) to be in responsible charge of the construction, erection, installation, alteration, or of the performance of a mechanical engineering service in connection with the manufacture, sale, supply or distribution of any mechanical works, project or plant either for himself or for other, unless he is a du…

ARTICLE III
EXAMINATION, REGISTRATION AND LICENSE

Sec. 12. Examination Required. – All applicants for registration for the practice of mechanical engineering shall be required to undergo and pass a written technical examination as provided for in this Act.




Section 13. Categories. – Certificates of registration for the practice of mechanical engineering shall be of three (3) categories and in order of rank as follows:

(a) Professional Mechanical Engineer;

(b) Mechanical Engineer; and

(c) Certified Plant Mechanic.

Section 14. Qualification of Applicants for Professional Mechanical Engineer. – Any applicant to the Professional mechanical engineering examination must, at the time of filing of his application, establish to the satisfaction of the Board that:

(a) He is a citizen of the Philippines;

(b) He must not have been convicted by a court of law of a crime involving moral turpitude;

(c) He has a valid certificate of registration and he is a registered mechanical engineer and a holder of …

ARTICLE II
BOARD OF MECHANICAL ENGINEERING
Sec. 4. Creation and Composition of the Board of Mechanical Engineering. – There is hereby created a Board of Mechanical Engineering, hereinafter called the Board, to be composed of a Chairman and two (2) members to be appointed by the President of the Philippines from a list of three (3) recommendees for each position, chosen, ranked in the order of preference and submitted by the Professional Regulation Commission, hereinafter referred to as the Commission, from a list of five nominees submitted by the duly accredited association of mechanical engineers in the Philippines. The Board shall be organized not later than six (6) months from the effectivity of this Act.




Section 5. Qualification of Members of theBoard. – A member of the Board shall, at the time of his appointment, possess the following qualifications:

(a) Natural born citizen and resident of the Philippines;

(b) Must be at least thirty-five (35) years of age;

(c) Holder of the degre…

Just a refresher for anyone who might not be familiar with the law that governs the practice of Mechanical Engineering in the Philippines.


Republic of the Philippines
Congress of the Philippines

Metro Manila

Tenth Congress

February 12, 1998


Republic Act No. 8495

AN ACT REGULATING THE PRACTICE OF MECHANICAL ENGINEERING IN THE PHILIPPINES

Be it enacted by the Senate and House of Representatives of the Philippines in Congress assembled::



ARTICLE I


TITLE, STATEMENT OF POLICY AND DEFINITION OF TERMS


Section 1. Title. – This Act stall be known as the "Philippine Mechanical Engineering Act of 1998."

Section 2. Statement of Policy. – The State recognizes the importance of mechanical engineers in nation building and development. Their talents through sustainable human development shall be promoted. Thus, the State shall develop and nurture competent, virtuous, productive and well-rounded mechanical engineers whose standard of professional practice and service shall be excellent, qualitati…