Engineering Materials and Equipment (PAES 125)

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Questions and Answers

What is the warranty period for the rotating impact-driven type sprinkler head?

  • One year
  • Two years
  • Three months
  • Six months (correct)

For a riser mounted non-rotating sprinkler, what is the maximum nozzle height above collector?

  • 915 mm
  • 460 mm (correct)
  • 1830 mm
  • 1200 mm

What is the carbon content required for the hitch frame of a walking-type agricultural tractor?

  • 0.18-0.23% (correct)
  • 0.30-0.35%
  • 0.10-0.15%
  • 0.40-0.45%

What is the required carbon content for carbon steel used in drilling rigs?

<p>At least 80% (D)</p> Signup and view all the answers

What is the volumetric efficiency minimum requirement for the lever-operated knapsack sprayer?

<p>80% (B)</p> Signup and view all the answers

What is the minimum warranty period specified for electric motors?

<p>Six months (A)</p> Signup and view all the answers

Which power rating corresponds to a service factor of 1.35?

<p>0.12 to 0.25 kW (D)</p> Signup and view all the answers

What is the required minimum capacity for a tank used in conjunction with electric motors?

<p>10 liters (B)</p> Signup and view all the answers

At what distance and height should noise measurements be taken for small engines?

<p>200 rpm, 7.5 m away, 1.2 m high (D)</p> Signup and view all the answers

Which material is specified for the moldboard plow?

<p>Carbon steel (D)</p> Signup and view all the answers

What is the speed range for two-wheel tractor-drawn plows?

<p>3 kph to 4 kph (C)</p> Signup and view all the answers

Which material is most likely used for the shanks of a field cultivator?

<p>Alloy steel (e.g. AISI 5160) (B)</p> Signup and view all the answers

What is the warranty period for the spring-tooth harrow?

<p>One year (A)</p> Signup and view all the answers

What depth can the spring-tooth harrow reach?

<p>50 to 150 mm (2” to 6”) (D)</p> Signup and view all the answers

What is the field efficiency benchmark stated for a field cultivator?

<p>80% (A)</p> Signup and view all the answers

Which component of the mechanical rice transplanter is made of mild steel?

<p>Lever arm (B), Discharge outlet (C)</p> Signup and view all the answers

What is the maximum weight for a knapsack type rice transplanter?

<p>15 kg (A)</p> Signup and view all the answers

Which material is specifically stated for the ripper points of a subsoiler?

<p>Heat-treated carbon steel (e.g. AISI 1080) (D)</p> Signup and view all the answers

What is the required hardness for carbon steel used in at least 80% carbon content equipment?

<p>370 to 483 HV (B), 350 and 450 HB (D)</p> Signup and view all the answers

What is the maximum net weight specified for the mist blower?

<p>15 kg (A)</p> Signup and view all the answers

Which material is specified for the wand, tank cover, and gasket of the mist blower?

<p>Polyvinylchloride or better material (C)</p> Signup and view all the answers

What is the traveling speed range for four-wheel tractor-drawn plows?

<p>5 kph to 6 kph (A)</p> Signup and view all the answers

What is the operating pressure range for the power sprayer for mango?

<p>1.21 MPa to 1.75 MPa (A)</p> Signup and view all the answers

What is the field efficiency required for the sugarcane planter?

<p>80% (D)</p> Signup and view all the answers

What is the warranty duration for parts and services of the granular fertilizer applicator?

<p>6 months (A)</p> Signup and view all the answers

What is the specified Qrate for the weeder nozzles?

<p>$0.12 to 0.17$ Lpm (B)</p> Signup and view all the answers

What is the warranty period for agricultural trailers as per the specifications?

<p>Six months (A)</p> Signup and view all the answers

What is the maximum disc angle allowed for a disc plow?

<p>24 degrees (B)</p> Signup and view all the answers

Which of the following is the required carbon content for steel used in a furrower?

<p>At least 80% carbon content (B)</p> Signup and view all the answers

What is the traveling speed range for two-wheel tractor-drawn plows?

<p>3 kph to 4 kph (C)</p> Signup and view all the answers

What is the carbon content requirement for the steel used in weeders?

<p>At least 50% carbon content (C)</p> Signup and view all the answers

What is the required minimum efficiency for a row-crop planter without a fertilizer applicator?

<p>60% (D)</p> Signup and view all the answers

What is the maximum allowable depth of concavity for a disc plow?

<p>300 mm (D)</p> Signup and view all the answers

What is the speed limit for a four-wheel tractor on a paved road?

<p>15 to 20 kph (A)</p> Signup and view all the answers

What material is specified for the roll-over protective structures (ROPS)?

<p>Steel with an as-rolled thickness of not less than 2.5 mm (C)</p> Signup and view all the answers

What is the traveling speed range for seed drills?

<p>7 kph to 8 kph (B)</p> Signup and view all the answers

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Study Notes

Rotating Impact-Driven Type (PAES 125)

  • Warranty: six (6) months

Hitch for Walking-type Agricultural Tractor

  • Hitch Frame: mild steel plate with 0.18-0.23% carbon content
  • Pin, Sleeve: CRS with 0.37-0.44% carbon content

Rotating Sprinkler Head

  • Test Pressure: 170 kPa to 485 kPa, at increments of 35 kPa
  • Nozzle Height, Rotating, Riser Mounted:
    • 32 mm or smaller: 915mm
    • 38mm or larger: 1830mm
  • Nozzle Height, Non-Rotating: 460mm

Drilling Rig

  • Material: Carbon steel (AISI 1080) or high speed steel with molybdenum
  • Warranty: six (6) months

Electric Motor

  • Type: Universal Motor
  • Power Rating: Up to 3.73 kW
  • Service Factors and Power Ratings:
    • 1.40: 0.04 to 0.09 kW (1/20 to 1/8 hp)
    • 1.35: 0.12 to 0.25 kW (1/6 to 1/3 hp)
    • 1.25: 0.37 to 0.75 kW (1/2 to 1 hp)
    • 1.15: >0.75 to 149.20 kW (>1 to 200 hp)
    • 1.00: >149.20 to 373 kW (>200 to 500 hp)
  • Warranty: six (6) months

Moldboard Plow

  • Material: Carbon steel (AISI 1080) or Alloy steel with at least 0.0005% boron
  • Disc/Moldboard Plow Traveling Speed:
    • Four-wheel tractor-drawn: 5 to 6 kph
    • Two-wheel tractor-drawn: 3 to 4 kph
    • Animal-drawn: 2 to 4 kph

Disc Harrow

  • Concavity (Depth): 100 to 300 mm
  • Disc Angle: 24 degrees maximum
  • Spool Length: 175 or 225 + 2 mm
  • Ground Clearance: 125 mm

Furrower

  • Material: Carbon steel (AISI 1080) or Alloy steel with at least 0.0005% boron
  • Traveling Speed: 7 to 8 kph
  • Warranty: six (6) months

Agricultural Trailer

  • Warranty: six (6) months

Roll-Over Protective Structures

  • Material: Steel with 2.5mm thickness and 0.2% carbon content

Weeder

  • Material: Carbon steel with at least 50% carbon content, .05% sulphur and phosphorus (AISI 1055)
  • Hardness:
    • 350 to 450 HB
    • 37.7 to 47.8 HRC
    • 370 to 483 HV
  • Two-wheeled tractor-drawn: Carbon steel with at least 80% carbon content (AISI 1080)
  • Four-wheeled tractor-drawn: Carbon steel with at least 80% carbon content (AISI 1080) or Alloy steel with at least 0.0005% boron
  • Weeding Efficiency: 80%
  • Traveling Speed:
    • Four-wheel tractor-drawn: 5 to 6 kph
    • Two-wheel tractor-drawn: 3 to 4 kph
    • Animal-drawn: 2 to 4 kph

Rice Drum Seeder

  • Warranty: six (6) months
  • Traveling Speed: 1 to 2 kph

Granular Fertilizer Applicator

  • Warranty: six (6) months
  • Traveling Speed:
    • Four-wheel tractor-drawn: 5 to 6 kph
    • Two-wheel tractor-drawn: 3 to 4 kph
    • Animal-drawn: 2 to 4 kph

Field Cultivator

  • Field Efficiency: 80%
  • Material:
    • Main Frame and Transverse Toolbars: mild steel (AISI 1020)
    • Shanks: alloy steel (AISI 5160)
    • Shovel: heat-treated carbon steel (AISI 1080)
  • Warranty: three (3) years

Subsoiler

  • Field Efficiency: 80%
  • Material:
    • Main Frame and Transverse Toolbars: mild steel (AISI 1020)
    • Ripper Points: heat-treated carbon steel (AISI 1080)
  • Warranty: three (3) years

Mechanical Rice Transplanter

  • Field Efficiency: 80%
  • Float and Guide Wheels: Non-corrosive material

Mist Blower

  • Net weight: Less than 15 kg
  • Wand, Tank Cover, Gasket: Chemical resistant polyvinylchloride or better
  • Hose Clamps and Tank: Non-corrosive material (engineering plastic)
  • Strap: Durable and non-absorbent material (nylon fabric)
  • Strap Pads: Thickness (10mm), Width (65 mm)
  • Main Frame: AISI 1020 or better material
  • Qrate: 0.12 to 0.17 Lpm per nozzle
  • Air Speed: 90 m/s
  • Warranty: One (1) year

Power Sprayer for Mango

  • Operating Pressure: 1.21 MPa (175 psi) to 1.75 MPa (250 psi)
  • Qrate: 15 Lpm
  • Filter Mesh: 100 per square centimeter
  • Warranty: Parts and Services (6 months), Prime Mover (1 year)

Sugarcane Planter

  • Field Efficiency: 80%
  • Material:
    • Shanks and Furrow Closer: Alloy steel (AISI 5160)
    • Furrower: Heat-treated carbon steel (AISI 1080)
    • Cane Hopper, Feeding Shanks, and Tractor Engagement Assembly: Mild steel (AISI 1020)
  • Semi-automatic Sugarcane Planter: Chopper (Hardened steel AISI 1085)
  • Warranty: six (6) months

Soil Auger

  • Field Efficiency: 80%
  • Noise Level: Higher than 92 dB
  • Warranty: One (1) year

Spring-tooth Harrow

  • Field Efficiency: 80%
  • Material:
    • Main Frame, Transverse Toolbars, Lever Assembly: Mild steel (AISI 1020)
    • Spring-teeth and Cutting Tips, Spring-tooth Clamps: Alloy steel (AISI 5160)
  • Depth: 50 to 150 mm (2” to 6”)
  • Warranty: One (1) year

Granule Applicator

  • Field Efficiency: 80%
  • Material:
    • Shanks and Wear Shin: Alloy steel (AISI 5160)
    • Tank Applicator: Resistant polyvinylchloride or better
    • Lever Arm, Discharge Outlet: Mild steel (AISI 1020)

Knapsack Granule Applicator

  • Net weight: Less than 15 kg

Seeder Efficiency

  • Row-crop planter without fertilizer applicator: 60%
  • Row-crop planter with fertiliser applicator: 55%
  • Seed drill: 65%

Agricultural Tractor Speed Limit

  • Two-wheel tractor on paved road: 8 to 10 kph
  • Four-wheel tractor on paved road: 15 to 20 kph
  • Two-wheel tractor on bare dirt road: 4 to 6 kph
  • Four-wheel tractor on bare dirt road: 8 to 10 kph

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