### Mechanical Engineering Board Exam Questions Part 3

Source: Machinery's Handbook
Topic: Strength of Materials, Springs and Wire Ropes

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 the helical path in which the wires are laid.
a. lay
b. Strand Construction
c. stranding
d. ley

5. In ______, the wires and strands are laid in the same direction.
a. regular lay
b. alternate lay
c. lang lay
d. double lay

6. In a wire rope designation 6 X 7, the first number stand for.
a. nominal diameter of the wire rope (in mm)
b. diameter of each strand (in mm)
c. wires per strand,
d. number of strands

7. 6 X 7 class of wire rope is also known as...
a.Standard Hoisting Rope
b.Extra Flexible Hoisting Rope
c.Standard Coarse Laid Rope
d. Special Flexible Hoisting Rope

8. 6 X 19 class of wire rope is also known as...
a.Standard Hoisting Rope
b.Extra Flexible Hoisting Rope
c.Standard Coarse Laid Rope
d. Special Flexible Hoisting Rope

9. 8 X 19 class of wire rope is also known as...
a.Standard Hoisting Rope
b.Extra Flexible Hoisting Rope
c.Standard Coarse Laid Rope
d. Special Flexible Hoisting Rope

10. _____ type of wire rope core is used for small ropes such as sash cord and aircraft cord.
a. Asbestos cores
b. Fiber
c. Cotton
d. wire-strand core

### 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

### 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