Allowable loads on one bolt in seasoned wood loaded at both ends in normal duration
| Length of Bolt in Main Member (mm) |
Bolt Diameter (mm) |
||
|---|---|---|---|
| Species Group | |||
| I | II | ||
| Parallel to Grain | Perpencular to Grain | Parallel to Grain | Perpencular to Grain |
Properties of Philippine Woods at 80% Grade
| Species | Bending and Tension Parallel to Grain | Modulus of Elasticity in Bending | Compression Parallel to Grain | Compression Perpendicular to Grain | Shear Parallel to Grain |
|---|---|---|---|---|---|
| MPa | GPa | MPa | MPa | MPa |
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Properties of Philippine Woods at 50% Grade
| Species | Bending and Tension Parallel to Grain | Modulus of Elasticity in Bending | Compression Parallel to Grain | Compression Perpendicular to Grain | Shear Parallel to Grain |
|---|---|---|---|---|---|
| MPa | GPa | MPa | MPa | MPa |
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Group Species of Philippine Woods
| I. High Strength Group | II. Moderately High Strength Group | III. Medium Strength Group | IV. Moderately Low Strength Group |
|---|
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Properties of Wide Flange Sections
Warning: The technical content of this page is for educational purposes only and is not intended for professional work.
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Find $x$ from $xy = 12$, $yz = 20$, and $zx = 15$
Problem
Solve for x from the following equations:
| $xy = 12$ | $yz = 20$ | $zx = 15$ |
| A. 2 | C. 4 |
| B. 3 | D. 5 |
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Value of t for a germ population to double its original value
Problem
A germ population has a growth curve $Ae^{0.4t}$. At what value of $t$ does its original value doubled?
| A. t = 7.13 | C. t = 1.73 |
| B. t = 1.37 | D. t = 3.71 |
The sum and product of three distinct positive integers are 15 and 45, respectively. What is the smallest integer?
Problem
The sum and product of three distinct positive integers are 15 and 45, respectively. What is the smallest integer?
| A. 1 | C. 5 |
| B. 9 | D. 3 |
Comparing alternatives: Buy a truck vs rent a truck
Problem
A contractor can buy a dump trucks for P800,000 each (surplus) or rent them for P1,189 per truck per day. The truck has salvage value of P100,000 at the end of its useful life of 5 years. Annual cost of maintenance is P20,000. If money is worth 14% per annum, determine the number of days per year that a truck must be used to warrant the purchase of the truck.
| A. 200 | C. 198 |
| B. 199 | D. 197 |
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Largest box that can be made from rectangular cardboard
Problem
Mar wants to make a box with no lid from a rectangular sheet of cardboard that is 18 inches by 24 inches. The box is to be made by cutting a square of side x from each corner of the sheet and folding up the sides. Find the value of x that maximizes the volume of the box.
| A. 4.3 inches | C. 10.6 inches |
| B. 5.2 inches | D. 3.4 inches |
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