### ME Review: Strength of Materials

Instruction: Choose the BEST answer.

1. In the cross section of a shaft subjected to torsion, the stress is maximum at what location?
a. Near the center of the shaft
b. Between the surface and the center of the shaft
c. At the surface of the shaft
d. The stress is uniform from center to surface of the shaft

2. The stress experienced by a body under torsion is…
a. Shear stress
b. Compressive stress
c. Tensile stress
d. Bending stress

3. The stress experienced by a pressurized vessel is…
a. Shear stress
b. Compressive stress
c. Tensile stress
d. Bending stress

4. The “Maximum Shear Theory”, one of the known theories of failure is also known as…
a. Mises Yield theory
b. Guest’s theory
c. Venant theory
d. Rankine Theory

5. In the stress-strain curve, it is the point at which there is an appreciable elongation without corresponding increase in load.
a. Elastic limit
b. Rupture strength
c. Proportional limit
d. Yield point

6. What will happen to the stress in a shaft under torsion if the diameter was decreased to half the original?
a. The stress will be twice as much
b. The stress will be halved
c. The stress will be increased eightfold
d. The stress will remain the same

7. What will happen to the stress of a body under compression if the force applied to it was doubled?
a. The stress will increase to twice the original
b. The stress will increased to four times the original
c. The stress will remain the same
d. The stress will increase eightfold

8. Bending is actually a combination of two types of stresses…
a. Compression and torsion
b. Torsion and bearing
c. Compression and tension
d. Thermal stress and shear stress

9. The Mises yield theory of failure is best applied to what type of materials?
a. Brittle materials
b. Ductile materials
c. Elastomers
d. Metals only

10. The slope of the line before the proportional limit in a stress-strain curve is also known as…
a. Modulus of rigidity
b. Modulus of resilience
c. Modulus of elasticity
d. Modulus of toughness

Answers will be provided soon....

1. Galvanized steel is steel that has been hot dipped in a pool of molten zinc. The zinc adheres to the steel, cools and hardens to form a rust inhibitive finish to plain steel.

2. http://www.scribd.com/myfirstlibrary

3. hello TUP MECHANICAL

can you pls link to my site

http://ilearnalot.com

its a pleasure to be friend with you

thank you very much

4. Thank you so much. This questions are so useful for all mechanical engineers. Believe me or not every mechanical engineer must try all these questions.

5. www.Itcourses-distancelearning.com

National institute is the largest leading chain of skill based hands-on line -training providers for Vast Rang of
v Safety Officer/safety Engineer course
v Hotel management course
v Air Line Ticketing course
v Cabin Crew Air Hostess course
v Seo Search Engine Optimization course
v spoken English course
v Call center training course
v Web Development course
Technical Vocational
Training Courses Pakistan and All over the World. Its Educational Heritage Can Be Traced Since 2007. National Institute has always led the market by introducing latest market driven IT, linguistics and online Courses. National institute is a trusted name in the field of on line education and training having the largest chain of institutions in the on line worldwide. National institute has a large group of happy &satisfied students attaining successes in their future lives & prospects.

6. Spectro Group of Companies is the India #1 Testing Laboratory which is provide the calibration service, Inspection service, mechanical Testing, water testing, food testing, trainig program, project consultency, etc and all type of testing service.

### BOARD EXAM TIP: Which Review Center?

First of all, I would like to apologize for a long time I haven't posted anything but introduction. The reason for that is I'm busy optimizing the design of this site. I'm hoping that the make over is good. Anyway, I would like to dedicate this article to those who are going to take/retake the board exam this coming October. My sincere wish that you bring out the best among yourselves and may the deserving ones pass the exam.

Going back to the One-Million-Peso worth question: "Which review center should I enroll?", I would like to answer that in the most unbiased way I can. Of course, I'm only human and I had also my preferences but I will try my best to hide it.

To start with I will enumerate some of the prominent review centers that offer board exam reviews for mechanical engineering in the Philippines.

1. Alcorcon (Cebu & Manila)
2. Excel (Cebu & Manila)
3. Linx Engineering (Manila)
4. MERIT (Manila)
5. PRIME (Cebu)
6. RLB's CDTC (Manila)
I'…

### PAST MECHANICAL BOARD EXAM QUESTION: Machine Design Set-1 (solutions and answers)

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

### SOLUTION TO MECHANICAL BOARD EXAM PROBLEMS: Power Set-1

Here are the solutions to board problems given at Power Subject Set-1. If you do not understand anything, feel free to write a comment voicing out your concern. I'm still looking for better ways to present my solution. I still don't know how to present equations and mathematical symbols with blogger. Please bear with me.

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)

Solution:
Since volume is constant, use Charles’ Law on constant volume processes.
P1/T1=P2/T2
Note: P and T should be absolute.

(32+14.7)/ (50+460) =P2/ (75+460)

P2=48.99 psia

Converting back to gage pressure,

P2g=48.99-14.7

P2g=34.29 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 abso…