Skip to main content

Mechanical Engineering Review Questions: Materials and Heat Treatment Part 1

September board exam for this year is coming fast. As you may have heard from your coaches and review center teachers, it’s time to focus on the terminologies in mechanical engineering. Terms commonly referred to as “elements” comprise the majority of questions given in Mechanical Engineering board exams. For this reason, I have prepared questions on the topic: Materials and Heat Treatment.

The questions were taken from commonly used Handbooks and Textbooks in Mechanical Engineering.

Instruction: Choose the BEST answer.

1. A term referring to steels that has been deoxidized completely.
a. Rimmed Steel
b. Killed steel
c. Deoxidized steel
d. Cold steel

2. Because of physical or chemical changes, some metals lose their ductility. What term refers to this process?
a. Embrittlement
b. Hardening
c. Red shortness
d. Cold shortness

3. This is a property of some materials that enables them to accommodate huge deformation without breaking/rupture.
a. Malleability
b. Plasticity
c. Ductility
d. Toughness

4. A type of cast iron in which most of the Carbon is chemically combined with iron.
a. Nodular Cast
b. White Cast Iron
c. Pig Iron
d. Gray Iron

5. Substances that wear other substances that is softer than itself.
a. Abrasive
b. Corrosive
c. Sandpaper
d. Sandstone

6. An aluminum ore.
a. Hematite
b. Magnetite
c. Corundum
d. Bauxite

7. The most commonly used material for springs.
a. Hard Drawn
b. Stainless Steel
c. Chrome-Vanadium
d. Music wire

8. The referring to the brittleness of steel while it is red hot
a. Cold Shortness
b. Hot shortness
c. Red shortness
d. White Shortness

9. Materials that has the same properties in all directions.
a. Isotropic materials
b. Homogeneous materials
c. Heterogeneous materials
d. Orthotropic materials

10. Alloyed with steel, this material promotes fine grain structure and improved the ratio of endurance strength to ultimate strength.
a. Sulfur
b. Silicon
c. Cobalt
d. Vanadium

Answers to be posted after 2 days.

Comments

Popular posts from this blog

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

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 be