A load which tends to shorten or crush a structural member. A. compression B. shear C. tension D. bending
A. compression
A simply supported beam has a span of ‘L’ and a uniformly distributed load of ‘w’. What is the value of the reactions at the support?
1/2 wL
The ability of a material to retain its strength and other properties over a considerable period of time. A. Durability B. Elasticity C. Toughness D. Stiffness
A. Durability
The minimum space requirement for weaners (up to 10 kg weight) is 0.11 square meter per animal. How many pigs of this category can be confined in a 2m by 1.5m pen?
(2x1.5)/0.11=27.3 =27
How many bd-ft is in a piece of lumber with a cross-section of 2”x4” if its length is 216 in?
bd ft = [(2 x 4) (216 x 1/12)]/12 = 12
Smaller members which directly support the floor or ceiling. A. Joists B. girders C. rafters D. purlins
A. Joists
Refers to the capacity of the material to resist fracture under impact loading. A. Toughness B. Hardness C. Elasticity D. Workability
A. Toughness
aluminum rod is rigidly attached b/n a steel rod and a bronze rod. Axial loads are applied at the positions indicated. Find the max. value of P that will not exceed a stress in steel of 140 MPa,in aluminum of 90 MPa, or in bronze of 100 MPa
10,000 N or 10 kN
Sheet metal that is thicker than gauge 22. A. gauge 24 B. gauge 26 C. gauge 14 D. both a and b
C. gauge 14
A wooden post with a cross-section of 200mmX100mm has a length of 2,500mm. What is the slenderness ratio?
Slenderness ratio = effective length/least radius = 2500mm/100mm = 25
A pig pen measuring 1.5 m x 4.8 m is to be constructed of concrete and concrete hollow blocks (CHB). Estimate the volume of concrete for the continuous footing if the thickness is 15 cm and the width is 30 cm.
Volume = (Perimeter) (thickness x width) = [(2x4.8) + (2x1.5)] (0.15 m) (0.30 m) = 0.567 cu.m.
A board-foot of lumber is equivalent to ___________. A. 144 in^3 B. 1 cu.ft. C. a and b D. none of a and b
A. 144 in^3
Refers to a swine with 40 to 65 kilograms in weight A. grower B. fattener C. finisher
A. grower
Engr. X & Engr. Y were asked by Dean Santos to design 5 pcs. of benches. The engineers found out that they needed 10 pcs. of 2"x3"x12' and 6 pcs. of 2"x2"x12 for each bench. How many board feet of lumber would they need per piece of bench?
Structural element that transmits, through compression, the weight of the structure above to other structural elements below. A. Truss B. Column C. Beam
B. column
What force is required to punch a 20-mm-diameter hole in a plate that is 25 mm thick? The shear strength is 350 MN/m^2.
P = 350 [pi (20) (25)] = 549.8 kN
If 12.5 square meters of space is needed for every 100 heads of chickens more than 4 weeks old, what should be the length of a 10 m wide poultry house to accommodate 10,000 heads of such animals?
Length= 12.5/100 : 10 (x)/10,000 = 125 m
One of the most commonly used building material in many parts of the world because of its reasonable cost, ease of working, attractive appearance and adequate life if protected from moisture and insects.
Wood
A hollow steel tube with an inside diameter of 100 mm must carry a tensile load of 400 kN. Determine the outside diameter in mm of the tube if the stress is limited to 120 MN/m^2.
119.35 mm
An inclined or horizontal member that establishes the upper edge of a truss. This member is subjected to compressive and bending stresses. A. king post B. bottom chord C. top chord D. webs
C. Top chord
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