VOLUME 11- AREA 3




1. What swine housing management system keeps the sows and piglets in the farrowing house until weaning, after which the weanlings are moved directly to a growing-finishing house?
a. One-unit system
b. Two-unit system
c. Three-unit system
d. Four-unit system
Explanation: According to PAES 401:2001 (Housing for Swine Production), a two-unit system handles farrowing-to-weaning in one house, and growing-to-finishing in a second house.
2. What is the maximum acceptable standard noise level emitted by a mechanical rice reaper during operation?
a. 85 dBA
b. 90 dBA
c. 92 dBA
d. 95 dBA
Explanation: PAES 212:2004 (Agricultural Machinery - Rice Reaper - Specifications) mandates that the noise level from the operator's position shall not exceed 92 dBA.
3. Which type of flooring features systematic openings designed to facilitate the immediate cleaning of droppings in a layer production house?
a. Solid concrete type
b. Slotted type
c. Litter type
d. Earth floor type
Explanation: PAES 402:2001 (Housing for Layer Production) specifies slotted or perforated floors to let manure drop through, keeping the environment sanitary.
4. What is the minimum floor space requirement per animal specified for a single boar pen?
a. 5.0 square meters
b. 6.2 square meters
c. 7.5 square meters
d. 9.0 square meters
Explanation: PAES 401:2001 mandates a minimum floor area of 7.5 square meters for an individual boar pen to ensure sufficient animal movement.
5. Which of the following attributes is considered a disadvantage, rather than an advantage, when operating a hammer mill?
a. High versatility for different materials
b. Simplicity of construction
c. Reduced danger of damage from foreign objects
d. High initial and operating costs
Explanation: While hammer mills are tough and highly versatile, their substantial power demands and capital investments represent an operational disadvantage.
6. For a lateral or sub-lateral farm ditch canal with an available roadway width of 3 meters, what are the respective standard widths required for the carriageway and the shoulders?
a. 2.0 meters carriageway and 0.5 meter shoulder
b. 1.5 meters carriageway and 0.75 meter shoulder
c. 2.5 meters carriageway and 0.25 meter shoulder
d. 3.0 meters carriageway and 0.0 meter shoulder
Explanation: Under PAES design standards for Farm-to-Market Roads (FMR) and canal embankments, a 3m total width allocates 2m to the active vehicle path and 0.5m to each safety shoulder side.
7. What is the structural term given to the layer of aggregate, treated soil, or soil-aggregate mixture that rests directly upon the subbase or subgrade?
a. Surface dressing
b. Base course
c. Prime coat
d. Wearing course
Explanation: In road construction standards, the base course sits right under the pavement surface to distribute structural loads away from the subgrade foundation.
8. What are the recommended structural dimensions of a grain warehouse designed to store exactly 10,000 cavans of bag-piled palay?
a. 10 meters by 30 meters
b. 12 meters by 25 meters
c. 15 meters by 40 meters
d. 20 meters by 30 meters
Explanation: PAES 411:2002 (Agricultural Structures - Warehouse for Bag Storage of Grains) identifies a 10m x 30m space as ideal for handling a 10,000-cavan capacity with proper alleyways.
9. Which greenhouse cladding material provides reliable rain protection, demands very low initial investment, and requires minimal structural framing components?
a. Polycarbonate sheets
b. Polyethylene film
c. Fiberglass panels
d. Annealed glass
Explanation: PAES 418:2002 (Agricultural Structures - Greenhouse) notes that plastic films like polyethylene are the most cost-effective and structurally lightweight materials for tropical greenhouse designs.
10. What is the standard wire gauge number recommended for the construction of laying cage floors in poultry houses?
a. Gauge #8
b. Gauge #10
c. Gauge #12
d. Gauge #16
Explanation: PAES 402:2001 specifies Gauge #12 wire for cage floors to offer the best balance between structural support for the birds and egg safety.
11. What is the minimum recommended air circulation clearance space that must be maintained between the greenhouse sidewalls and the planting benches?
a. 100 mm
b. 120 mm
c. 150 mm
d. 160 mm
Explanation: Under PAES 418:2002, a gap of at least 160 mm is required between the exterior walls and the benches to prevent microclimate stagnant zones.
12. What specific method of greenhouse construction involves linking multiple modular roof units together at the eave line using a shared, continuous gutter?
a. Lean-to greenhouse
b. Single-span even-span greenhouse
c. Ridge and furrow greenhouse
d. Quonset multi-span greenhouse
Explanation: Ridge and furrow (or gutter-connected) greenhouses join multi-span structures together at the eaves to form a large, contiguous internal production space.
13. In which swine production layout do the sows and their piglets stay entirely within the farrowing structure from birth up until the day of weaning?
a. One-unit system
b. Two-unit system
c. Three-unit system
d. Continuous flow system
Explanation: This is a core definition from PAES 401:2001, separating farrowing actions from growing and finishing locations.
14. What is the baseline standard ventilation rate required under normal environmental conditions for an active farrowing unit housing a single sow and her litter?
a. 0.15 cubic meters per minute
b. 0.28 cubic meters per minute
c. 0.45 cubic meters per minute
d. 0.60 cubic meters per minute
Explanation: PAES 401:2001 specifies a baseline ventilation capability of 0.28 m3/min per farrowing pen to exchange odors and heat effectively.
15. How many grams of sample material must be fully removed and tested from a 60-kilogram batch of brown rice during a standard laboratory reduction test?
a. 2 grams
b. 5 grams
c. 10 grams
d. 20 grams
Explanation: Official grain grading procedures state that a sub-sample down to 2 grams is used to perform technical counts for purity, wholeness, and dockage analysis.
16. Which of the following geological surface profiles exhibits the highest allowable soil-bearing capacity for agricultural structures?
a. Hard rock formation
b. Compact gravel and coarse sand
c. Soft sedimentary clay layer
d. Loose silty organic sand
Explanation: Solid, unweathered bedrock (hard rock) offers the highest structural bearing load capacity, preventing foundation settlement.
17. Which engineering term defines the specific ability of a commercial rice mill to peel hulls cleanly away without shattering the inner kernels?
a. Coefficient of hulling
b. Coefficient of wholeness
c. Milling recovery index
d. Degerming performance factor
Explanation: Coefficient of wholeness expresses the ratio of unbroken brown rice grains produced to the total amount of brown rice recovered after processing.
18. What is the minimum curing duration required before removing structural forms from freshly poured concrete on a Farm-to-Market Road project?
a. 12 hours
b. 24 hours
c. 48 hours
d. 72 hours
Explanation: DPWH and Philippine agricultural engineering guidelines for rural roads mandate keeping forms in place for at least 24 hours to preserve structural geometry during initial set.
19. What is the minimum open-lot space requirement per animal when designing an intensive cattle feedlot facility?
a. 2.5 square meters
b. 4.5 square meters
c. 6.0 square meters
d. 8.5 square meters
Explanation: PAES 406:2001 (Housing for Cattle Feedlot) sets the bare minimum open lot area to 4.5 square meters per adult head.
20. Within a farrowing pen setup, supplementary infrared heat lamps must be suspended at what minimum distance directly above the sow level?
a. 100 mm
b. 125 mm
c. 152 mm
d. 200 mm
Explanation: PAES 401:2001 requires safety heights of at least 152 mm (approx. 6 inches) to prevent burning injuries to the animal while providing warmth to the creep area.
21. During site clearing operations for a farm road, tree diameters are taken at 1.4 meters above ground. Below what minimum diameter threshold are trees excluded from project payment records?
a. 50 mm
b. 100 mm
c. 150 mm (represented as 0.15m in metrics)
d. 300 mm
Explanation: Standard FMR road specifications dictate that small brush or trees under 150 mm (0.15m) in diameter at breast height fall under general clearing work rather than specialized logging tallies.
22. What structural component is positioned inside a biogas digester to prevent fresh slurry from short-circuiting straight into the discharge outlet?
a. Intake pipe
b. Baffle board
c. Gas holder rim
d. Sludge scraper
Explanation: PAES 412:2002 (Agricultural Structures - Biogas Plant) notes that internal baffle walls force the materials to mix thoroughly, assuring proper hydraulic retention time.
23. What is the typical median methane percentage composition required to produce high-quality, combustible biogas?
a. 35%
b. 50%
c. 65%
d. 85%
Explanation: PAES 412:2002 highlights that standard biogas outputs consist of 50-70% Methane (CH4), with 65% representing an optimal burning mix.
24. Which component of an agricultural wind farm system transforms the pure rotational mechanical movement of the blades into alternating current (AC) electricity?
a. Commutator
b. Charge controller
c. Alternator
d. Inverter
Explanation: Alternators are specialized electromechanical generators that nately produce AC power from turbine shaft rotations.
25. When setting up a poultry brooding station, what total supplemental electrical lighting wattage capacity must be supplied per square meter during the initial 48 hours?
a. 15 watts per square meter
b. 25 watts per square meter
c. 35 watts per square meter
d. 50 watts per square meter
Explanation: PAES poultry housing design notes state that providing 35 watts/m2 allows optimal visibility for newly hatched chicks to locate water and feed sources quickly.
26. What is the minimum structural distance that a milking parlor must be located away from the primary cattle confinement barn to maintain sanitary conditions?
a. 10 meters
b. 20 meters
c. 30 meters
d. 50 meters
Explanation: PAES 409:2002 (Agricultural Structures - Milking Parlor) states that a 30m isolation gap is necessary to prevent milk contamination from housing odor and waste flies.
27. What is the minimum linear feeder space allocation required for every 100 chickens aged 4 weeks and below?
a. 2 meters per 100 birds
b. 4 meters per 100 birds
c. 6 meters per 100 birds
d. 8 meters per 100 birds
Explanation: Standard poultry space references specify a cumulative feeding edge length of 4 cm per chick (which translates to 4 meters per 100 birds).
28. According to engineering test standards, what is the maximum allowable percentage variation in the cut lengths produced by a mechanical forage chopper?
a. 20%
b. 35%
c. 50%
d. 65%
Explanation: PAES 219:2004 (Agricultural Machinery - Forage Chopper - Specifications) states the length-of-cut uniformity should fall within a 50% max variation parameter.
29. What is the expected total waste volume accumulation or required handling area generated per day by a standard herd of dairy cows?
a. 150.5 area units
b. 295.2 area units
c. 410.8 area units
d. 500.0 area units
Explanation: Agricultural structures waste tables dictate exact manure load metrics; 295.2 square units represents the standard footprint calculations for waste management sizing.
30. What term defines the financial value awarded to project developers through Clean Development Mechanism (CDM) programs for reducing greenhouse gas outputs?
a. Carbon credit value
b. Green tariff yield
c. Environmental baseline dividend
d. Renewable offset subsidy
Explanation: Carbon credits act as tradable certificates representing the removal or prevention of one metric ton of carbon dioxide equivalent (CO2e).
31. What is the term for the ratio of the net heat safely transferred to the drying medium over the total potential heat energy contained within the fuel source?
a. Thermal efficiency
b. Combustion efficiency
c. Volumetric furnace rating
d. Enthalpy recovery ratio
Explanation: Combustion efficiency specifically gauges the chemical completeness of fuel oxidation into thermal output.
32. What is the minimum floor space requirement per bird when designing a poultry house featuring a completely slotted floor configuration?
a. 0.10 square meters
b. 0.14 square meters
c. 0.25 square meters
d. 0.50 square meters
Explanation: PAES 402:2001 mandates that full slotted floor systems allow a maximum density of 4 birds per square meter (0.25 m2 per bird).
33. According to PAES performance requirements for a mechanical peanut sheller, the percentage of damaged kernels must not exceed what value?
a. 1.0%
b. 2.0%
c. 3.5%
d. 5.0%
Explanation: PAES 224:2005 (Agricultural Machinery - Peanut Sheller - Specifications) sets the maximum allowable machine-induced kernel damage limit to 3.5%.
34. What is the critical baseline ventilation requirement per unit under normal operational settings for a farrowing environment?
a. 0.10 cubic meters per minute
b. 0.28 cubic meters per minute
c. 0.40 cubic meters per minute
d. 0.55 cubic meters per minute
Explanation: (Duplicate matching core validation text). PAES 401:2001 reinforces 0.28 m3/min as the primary tropical exchange value for a sow and litter.
35. Which type of continuous-flow grain dryer moves both the drying air and the grain mass simultaneously in the exact same direction?
a. Cross-flow dryer
b. Counter-flow dryer
c. Concurrent-flow dryer
d. Fluidized-bed dryer
Explanation: In concurrent-flow drying designs, the hottest air meets the wettest grain at the top inlet point, traveling downward together.
36. What is the standard minimum thickness required for the rubber layer on a commercial rice huller roller?
a. 5 mm
b. 10 mm
c. 15 mm
d. 20 mm
Explanation: PAES standards for rubber-roll components mandate a minimum rubber material thickness of 15 mm to preserve tool life and prevent premature peeling.
37. Within Computer-Aided Design (CAD) software environments, what does the technical acronym UCS stand for?
a. User Coordinate System
b. Universal CAD Standard
c. Unified Vector Structure
d. Utility Control Selection
Explanation: The User Coordinate System (UCS) allows the designer to change the position and orientation of the X, Y, and Z axes manually in workspace zones.
38. What is the maximum cross-slope percentage limit allowed from the road center line toward the drainage ditch for concrete surfaces on Farm-to-Market roads?
a. 1.0%
b. 1.5%
c. 2.5%
d. 3.0%
Explanation: PAES guidelines for concrete agricultural access roads stipulate a standard 1.5% crown slope to clear surface runoff water without compromising vehicle traction.
39. What is the traditional local term given to the coarse powder by-product composed of the outer coverings of corn kernels separated during milling?
a. Tikitiki
b. Tahop
c. IPA
d. Binlid
Explanation: PAES 210:2004 (Agricultural Machinery - Corn Mill - Specifications) defines "Tahop" as the coarse corn bran by-product frequently utilized for livestock feed blends.
40. Land selected for cattle ranching layouts should have a maximum slope threshold of what value to prevent severe erosion and structural risk zones?
a. 18%
b. 35%
c. 58%
d. 70%
Explanation: PAES standards for cattle ranches dictate that slopes over 58% must be fenced out or avoided to secure animal paths and prevent dangerous landscape degradation.
41. What is the standard air circulation space requirement between sidewalls and planting benches in a greenhouse?
a. 100 mm
b. 160 mm
c. 200 mm
d. 250 mm
Explanation: (Validation double entry check). PAES 418:2002 explicitly mandates a minimum perimeter gap of 160 mm to facilitate proper internal thermal buoyancy.
42. What is the maximum power generation rating threshold used to classify a system as a micro-hydroelectric power plant?
a. 10 KW
b. 100 KW
c. 500 KW
d. 1000 KW
Explanation: Under Philippine Renewable Energy classifications, micro-hydro systems generate capacities ranging from 11 KW up to a maximum of 100 KW.
43. What is the technical name of the working fluid substance that absorbs heat inside a refrigeration cycle through structural expansion and vaporization?
a. Refrigerant
b. Brine liquid
c. Coolant medium
d. Compressor oil
Explanation: Refrigerants undergo cyclic phase changes from liquid to gas state to pull latent heat out of cooling chambers.
44. A screen grid sorting range measurement falling between 0.310 mm and 0.635 mm is classification terminology for what specific grouping metric?
a. Sieve range
b. Fineness baseline
c. Particle scale index
d. Micron core tier
Explanation: Sieve ranges specify precise particle filtering dimensions using wire cloth screens during aggregate or ground feed sorting.
45. What is the vector mechanics term used to describe the single, net group of concurrent coplanar forces acting in a plane?
a. Component vector
b. Equilibrant
c. Resultant
d. Moment arm
Explanation: The resultant force is the combination of all individual forces acting on a point body structure.
46. Which type of forage chopper utilizes a high-velocity mechanical fan configuration to push the chopped plant materials upward through a discharge pipe?
a. Blow-up type
b. Gravity-drop type
c. Conveyor-carry type
d. Augered discharge type
Explanation: Blow-up type configurations combine cutting knives with impeller paddles to pneumatically convey silage into tall silos or transport beds.
47. What unit represents the precise quantity of heat required to raise the temperature of one pound of liquid water by one degree Fahrenheit?
a. Calorie
b. Joule
c. British Thermal Unit (BTU)
d. Watt-hour
Explanation: This is the exact engineering definition of the British Thermal Unit (BTU) used in thermodynamic and refrigeration work.
48. What is the standard linear waterer space requirement required for every 100 chickens aged 4 weeks and below?
a. 1.5 meters per 100 birds
b. 2.5 meters per 100 birds
c. 3.5 meters per 100 birds
d. 4.0 meters per 100 birds
Explanation: Poultry architectural spacing standards designate 2.5 cm of drinking trough edge access per young chick, yielding 2.5 meters total per 100 birds.
49. What electrical circuit component is integrated into solar photovoltaic arrays to prevent reverse current leakage back into the panels during times of low solar radiation?
a. Blocking diode
b. Bypass diode
c. Zener diode
d. Varistor element
Explanation: Blocking diodes ensure that electric currents only travel from the solar arrays to the batteries or inverter, blocking battery discharge backwards during night hours.
50. What is the maximum generation power capacity rating threshold designated for a micro-hydroelectric facility?
a. 50 KW
b. 100 KW
c. 250 KW
d. 500 KW
Explanation: (Verification duplicate checkpoint check). Philippine alternative power laws solidify 100 KW as the firm micro classification cutoff point.
51. What is the correct term used to describe a mature male goat?
a. Buck
b. Doe
c. Wether
d. Billy
Explanation: In livestock terminology, a mature male goat is called a buck (or caprine), while a mature female is a doe.
52. In a lateral or sub-lateral irrigation canal where the available roadway width is 3 meters, what are the respective structural dimensions required for the carriageway and the shoulders?
a. 2.0 meters carriageway and 0.5 meter shoulder
b. 1.5 meters carriageway and 0.75 meter shoulder
c. 2.5 meters carriageway and 0.25 meter shoulder
d. 2.2 meters carriageway and 0.40 meter shoulder
Explanation: PAES guidelines for Farm-to-Market Roads (FMR) running along embankments state that a 3m road bed allocates 2m for the active traffic lane (carriageway) and 0.5m on each side for the shoulder.
53. According to PAES specifications for rubber roll rice hullers, what is the minimum required thickness of the rubber layer?
a. 5 mm
b. 10 mm
c. 15 mm
d. 20 mm
Explanation: PAES requires a minimum rubber layer thickness of 15 mm on the metal core to withstand the intense friction and heat of the hulling process.
54. What is the maximum allowable percentage of mechanically damaged kernels permitted during the evaluation of a mechanical peanut sheller?
a. 1.5%
b. 2.5%
c. 3.5%
d. 5.0%
Explanation: PAES 224:2005 (Peanut Sheller - Specifications) states that the mechanical damage index of the output kernels shall not exceed 3.5%.
55. What is the recommended slope range for floor layouts in intense livestock or poultry housing structures to ensure efficient drainage?
a. 0.5% to 1%
b. 2% to 4%
c. 5% to 7%
d. 8% to 10%
Explanation: A floor slope of 2% to 4% allows wastewater and manure wash to drain smoothly into gutters without making the surface too slick or steep for the animals.
56. What traditional local term describes the coarse powder by-product consisting of the outer covering of the corn kernel that is removed during the milling process?
a. Tikitiki
b. Tahop
c. IPA
d. Binlid
Explanation: PAES 210:2004 (Corn Mill - Specifications) defines "Tahop" as the coarse corn bran by-product separated from the grits during mechanical processing.
57. In fluid mechanics and droplet distribution calculations, what mathematical expression represents the standard range diameter factor of a nozzle?
a. 0.22 W/L
b. 0.44 W/L
c. 0.66 W/L
d. 0.88 W/L
Explanation: The dimensionless range diameter ratio is conventionally modeled by the 0.44 W/L coefficient expression in spray and fluid dynamic mechanics.
58. According to PAES poultry housing guidelines, what is the maximum recommended stocking density for broilers less than 4 weeks old?
a. 6 to 25 birds per square meter
b. 26 to 40 birds per square meter
c. 41 to 55 birds per square meter
d. 56 to 70 birds per square meter
Explanation: PAES 402:2001 layout metrics state that young broilers under 4 weeks can be stocked at a density range of 6–25 birds/m2 depending on the ventilation system.
59. Which thermodynamic engine cycle is commonly referred to as the gasoline engine cycle?
a. Otto cycle
b. Diesel cycle
c. Rankine cycle
d. Carnot cycle
Explanation: The ideal Otto cycle models the operation of spark-ignition (gasoline) internal combustion engines.
60. When the dry-bulb temperature and the wet-bulb temperature match exactly on a psychrometric chart, what is the relative humidity of the air?
a. 0%
b. 50%
c. 75%
d. 100%
Explanation: When dry-bulb and wet-bulb temperatures are equal, the air is holding its maximum capacity of moisture, representing a state of 100% saturation (relative humidity).
61. What is the minimum required ventilation rate under normal tropical conditions for a farrowing house unit (sow and litter)?
a. 0.15 cubic meters per minute
b. 0.28 cubic meters per minute
c. 0.45 cubic meters per minute
d. 0.60 cubic meters per minute
Explanation: PAES 401:2001 specifies a baseline ventilation requirement of 0.28 m3/min per farrowing crate unit to manage ambient moisture and odors.
62. Which government organization establishes the regulatory basis and standards for the Constructor's Performance Evaluation System (CPES) in the Philippines?
a. CIAP (Construction Industry Authority of the Philippines)
b. AMTEC
c. PCA (Philippine Contractors Association)
d. DPWH
Explanation: The Construction Industry Authority of the Philippines (CIAP), an agency under the DTI, manages the guidelines for structural performance evaluation through CPES.
63. What is the linear waterer space requirement recommended per 100 birds whose age is 4 weeks and below?
a. 1.5 meters per 100 birds
b. 2.5 meters per 100 birds
c. 3.5 meters per 100 birds
d. 4.0 meters per 100 birds
Explanation: Standard agricultural blueprints dictate 2.5 cm of drinking trough edge access per young chick, equivalent to 2.5 meters total per 100 birds.
64. Under PAES 402:2001 guidelines, what is the maximum stocking density allocation range for growing broilers under 4 weeks of age? (Verification verification check)
a. 6 to 25 birds per square meter
b. 26 to 40 birds per square meter
c. 41 to 55 birds per square meter
d. 56 to 70 birds per square meter
Explanation: (Duplicate confirmed in input data). 6–25 birds/m2 remains the standard spacing tier for early brooding phases under PAES.
65. What is the specific term for the flammable gas blend generated from the anaerobic fermentation of organic matter like animal manure?
a. Natural gas
b. Propane
c. Biogas
d. Producer gas
Explanation: Biogas is a mixture containing predominantly methane (CH4) and carbon dioxide (CO2) produced by anaerobic bacteria during fermentation.
66. A commercial slaughterhouse facility must be located at a minimum distance of how many meters away from human habitations, factories, public roads, or public spaces?
a. 50 meters
b. 100 meters
c. 200 meters
d. 500 meters
Explanation: NMIS (National Meat Inspection Service) and structural regulations specify a 200-meter sanitary isolation buffer zone around abattoirs.
67. What term describes the ratio of the total heat actively utilized to vaporize product moisture to the absolute amount of heat energy added to the drying air?
a. Drying efficiency
b. Thermal furnace yield
c. Heat recovery factor
d. Latent sensible index
Explanation: Drying efficiency evaluates how effectively the system uses input thermal energy strictly to perform the evaporation work.
68. Which biological condition is defined by the complete and total absence of free or molecular oxygen?
a. Aerobic
b. Anaerobic
c. Anoxic
d. Facultative
Explanation: Anaerobic environments allow specialized methane-producing or acidogenic bacteria to function without oxygen.
69. Which type of seed cleaner specifically utilizes targeted air currents to separate lightweight, low-density chaff and debris from heavier grain kernels?
a. Aspirator
b. Rotary screen grader
c. Gravity separator table
d. Magnetic drum separator
Explanation: An aspirator relies on an induced or forced stream of air to lift fine contaminants out of falling grain streams based on aerodynamic drag.
70. Which primary component of an aerogenerator wind turbine is directly responsible for capturing wind potential power?
a. Nacelle
b. Rotor
c. Alternator
d. Tower
Explanation: The rotor assembly (composed of blades and the hub) intercepts kinetic wind energy and converts it into rotational mechanical shaft power.
71. When installing plywood panels during wall construction, the sheets must be securely attached directly to which framing element?
a. Joist
b. Stud
c. Rafter
d. Girt
Explanation: Studs are vertical members within a wall framework that support internal or external sheathing panels like plywood.
72. The total electrical resistance of a conductor wire increases under all the following structural conditions except:
a. An increase in wire length
b. An increase in wire diameter
c. An increase in material temperature
d. An increase in material resistivity
Explanation: Resistance is inversely proportional to cross-sectional area. Therefore, increasing the wire diameter lowers resistance rather than increasing it.
73. What is the minimum recommended illumination level inside poultry houses for finishing broilers?
a. 50 lux
b. 100 lux
c. 200 lux
d. 500 lux
Explanation: Modern technical poultry lighting guides suggest 200 lux illumination levels during early and growing production stages to enable feed visibility and uniform behavior.
74. Commercial greenhouse farming structures in the Philippines must be structurally engineered to withstand wind gusts of up to what maximum speed?
a. 150 kph
b. 200 kph
c. 250 kph
d. 300 kph
Explanation: PAES 418:2002 states that green-housing frameworks must withstand structural wind loads and gusts up to 250 kph due to frequent tropical typhoon landfalls.
75. What civil engineering term describes a raised earth bank or wall built to carry a roadway, prevent regional floods, or hold back water body volumes?
a. Embankment
b. Cut-slope
c. Abutment
d. Sheet pile
Explanation: An embankment is a compacted ridge of soil or rock aggregate constructed to support paths or resist hydraulic pressures.
76. Which classic soil infiltration equation is mathematically modeled based on an exhaustion process concept?
a. Horton's equation
b. Green-Ampt equation
c. Kostiakov equation
d. Philip's equation
Explanation: Horton's formula conceptualizes infiltration capacity as a decaying exponential function, treating the soil's absorption drop like an exhaustion mechanism over time.
77. What open-channel distribution structures are placed directly across an irrigation ditch to temporarily block flow and raise the upstream water level?
a. Flumes
b. Checks
c. Chutes
d. Drops
Explanation: Irrigation checks are portable or permanent control gates dropped into channels to elevate water levels, facilitating diversion into field turnouts.
78. Under technical sorting indices, cracked corn particles falling between 0.86 mm and 1.09 mm in diameter are classified as what specific grade number?
a. Grit #12
b. Grit #14
c. Grit #18
d. Grit #24
Explanation: PAES 210:2004 corn mill sizing definitions correlate particles in the 0.86 mm–1.09 mm dimension band directly with standard Grit #18 properties.
79. According to PAES greenhouse specifications, what is the required minimum interior clear height of a greenhouse structure along the walkway or aisle position?
a. 2.0 meters
b. 2.5 meters
c. 3.0 meters
d. 3.5 meters
Explanation: PAES 418:2002 specifies a minimum overhead working clearance height of 2 meters at internal pedestrian paths to ensure operator comfort and safety.
80. What is the minimum wind speed design capacity required for constructing greenhouse frameworks in areas prone to tropical storm activity?
a. 180 kph
b. 250 kph
c. 300 kph
d. 320 kph
Explanation: (Verification confirmation entry). 250 kph wind velocity design parameters ensure greenhouse frameworks survive destructive gusts from typhoons.
81. What type of electric motor features field windings that are connected in parallel with the main armature circuit?
a. Series wound motor
b. Shunt wound motor
c. Compound wound motor
d. Universal brushless motor
Explanation: Shunt-wound DC motors provide exceptional speed regulation because the parallel field circuit receives constant system voltage.
82. What engineering term describes the air chamber or pressure compartment connected directly to distributing air ducts inside a crop drying system?
a. Plenum
b. Manifold unit
c. Venturi conduit
d. Cyclone zone
Explanation: A plenum chamber slows down air movement from fans, building up static pressure to achieve uniform air distribution across the grain mass.
83. According to PAES swine housing standards, what is the optimum initial environmental temperature required for weaners within the creep area?
a. 24 degrees Celsius
b. 27 degrees Celsius
c. 30 degrees Celsius
d. 35 degrees Celsius
Explanation: PAES 401:2001 specifies that newly weaned pigs require an ambient temperature zone of approximately 30 degrees Celsius to prevent cold stress.
84. According to PAES 201 testing guidelines, what is the maximum acceptable moisture gradient limit permitted across a continuous-flow grain dryer tower?
a. 1%
b. 2%
c. 4%
d. 6%
Explanation: The moisture variation (gradient) across the grain discharge paths of a continuous-flow dryer must not exceed 4% to ensure uniform drying and prevent internal stress cracks.
85. What specific power electronics equipment transforms alternating current (AC) electricity into direct current (DC) power?
a. Inverter
b. Rectifier (Correction needed - Source listed inverter)
c. Transformer
d. Alternator
Explanation: Note: Rectifiers convert AC to DC. Inverters convert DC to AC. Based on your prompt source trace, double check if the question intended DC-to-AC transformation, which matches an inverter.
86. Which piece of laboratory glassware features a ground-on airtight lid and contains standard desiccant crystals to maintain a low-humidity environment for dried samples?
a. Desiccator
b. Petri dish
c. Volumetric flask
d. Erlenmeyer jar
Explanation: Desiccators are sealed vessels used to cool hot, oven-dried samples without allowing them to reabsorb ambient moisture from the air.
87. According to PAES specifications for a mechanical peanut sheller, the maximum acceptable percentage of mechanically damaged kernels is: (Verification checkpoint)
a. 1.0%
b. 2.0%
c. 3.5%
d. 5.0%
Explanation: (Duplicate matching core text verification). PAES 224:2005 establishes a strict threshold of 3.5% for kernel damage.
88. What grain handling layout piles loose crops directly into large, room-sized bins, exerting lateral pressures that must be resisted by structural building walls?
a. Bulk storage
b. Bag storage
c. Deep bed container packing
d. Silo stacking
Explanation: Bulk storage designs require reinforced walls calculated to resist dynamic outward hydraulic-like grain pressures, unlike bag storage systems.
89. What biological wastewater treatment process agitates and aerates a mixture of wastewater and active biological solids to accelerate organic breakdown?
a. Activated sludge process
b. Trickling filter system
c. Anaerobic digestion pond
d. Septic treatment phase
Explanation: The activated sludge process relies on mechanical aeration to maintain high oxygen levels, allowing aerobic bacteria to digest organic contaminants efficiently.
90. What term describes a large, shallow earthen basin constructed specifically for the biological treatment and stabilization of agricultural or livestock wastewater?
a. Culvert base
b. Lagoon
c. Sump tank
d. Sedimentation ditch
Explanation: Waste treatment lagoons use natural solar, algal, and bacterial actions to stabilize organic livestock effluent over prolonged retention times.
91. Which Presidential Decree formally established and declared the comprehensive "Philippine Environmental Policy"?
a. PD 1151
b. PD 1152
c. PD 1586
d. RA 8749
Explanation: Presidential Decree 1151 was enacted to acknowledge the right of the people to a healthy environment and mandated the creation of environmental impact statements.
92. What type of waste stabilization lagoon features an upper zone that functions aerobically and a deeper bottom layer that functions anaerobically?
a. Pure anaerobic lagoon
b. High-rate aerobic basin
c. Facultative lagoon
d. Maturation pond
Explanation: Facultative lagoons combine aerobic surface layers with anaerobic bottom layers to treat raw livestock waste volumes dynamically.
93. What is the standard engineering diameter recommended for both vertical and horizontal steel reinforcing rebars used in open concrete canal construction?
a. 10 mm
b. 12 mm
c. 16 mm
d. 20 mm
Explanation: Standard agricultural irrigation channel details specify 10 mm steel rebar grids to reinforce concrete walls against soil shift loads.
94. What is the standard concrete wall thickness required for a lateral trapezoidal irrigation canal lining?
a. 5 cm
b. 10 cm
c. 15 cm
d. 20 cm
Explanation: Standard NIA (National Irrigation Administration) specifications specify a nominal lining thickness of 15 cm for durable trapezoidal lateral structures.
95. Which official machinery testing center was established in 1977 through a memorandum of agreement between the Department of Agriculture and UPLB?
a. AMTEC (Agricultural Machinery Testing and Evaluation Center)
b. PHILMECH
c. BPRE
d. NTA
Explanation: AMTEC, housed at UPLB, serves as the premier neutral testing center verifying performance specifications for all agricultural machinery sold in the Philippines.
96. Which classification of lighting fixtures utilizes luminous flux most efficiently by directing 90% to 100% of its light downward toward the target working plane?
a. Direct system
b. Semi-direct system
c. Indirect system
d. General diffuse system
Explanation: Direct lighting setups minimize wall and ceiling reflection losses, maximizing the illumination level on the work surface.
97. According to modern electrical standards, what is the baseline minimum service entrance ampacity recommended for new residential buildings?
a. 30 A
b. 60 A
c. 100 A
d. 200 A
Explanation: The Philippine Electrical Code (PEC) mandates a standard minimum residential service wire ampacity capacity of 100A to handle modern electrical loads.
98. What is the standard minimum conductor cross-sectional area required for overhead service drop lines connecting utility poles to farmhouse structures?
a. 3.5 mm2
b. 5.5 mm2
c. 8.0 mm2
d. 14.0 mm2
Explanation: The PEC requires service-drop conductors to have a minimum size of 5.5 mm2 (AWG #10) to provide sufficient mechanical strength and prevent excessive voltage drop.
99. Under the PEC, what is the minimum allowable service entrance ampacity rating for older or smaller residential structures with a total floor area under 93 square meters?
a. 60 A
b. 100 A
c. 125 A
d. 150 A
Explanation: For net structural areas under 93 m2 (1000 ft2), a smaller 60A service termination tier is legally allowed by code exceptions.
100. What specific electrical configuration integrates more than one type of energy generation technology into a single distribution grid system?
a. Stand-alone system
b. Grid-tied array
c. Hybrid system
d. Synchronous network
Explanation: Hybrid systems combine multiple sources, such as solar panels and diesel generators, to provide a more reliable power supply in rural or off-grid areas.

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