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Ag Mech CDE 2017

Quiz by Rose Jordan

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25 questions
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  • Q1
    Machinery: Approximately how many acres are in a rectangular field measuring 1940meters by 0.75miles? 1 acre = 43, 560 square feet 1 hectare = 2.47 acres 1 acre = 0.4045 HectaresArea of Rectangle = length xwidth 1 mile= 5,280feet 1 foot = 0.3048 meter
    613.5 acres
  • Q2
    Electrical: A variety of incandescent lights are all operating on a single 120-volt electrical circuit in a livestock barn. The circuit includes four 100-watt lights, five 150-watt lights, and six 60-watt lights. What is the amperage of the circuit with all of these lights operating? Total Wattage = Voltage x Amperage
  • Q3
    Compact Equipment: A 25 horse power single-cylinder engine is operating at 3,480 feet above sea level. What approximate horsepower can be produced by the engine if the engine’s power is reduced 1.5 percent for each 1000 feet of elevation above sea level?
  • Q4
    Structural: Steel angle iron is sold for $1.46per linear foot, steel rod is sold for 94 cents per linear foot, and steel pipe is sold for $2.76 per linear foot. If 35.5feet of angle iron, 12 feet of rod, and 100 inches of pipe are purchased, and 7% taxes are paid with the purchase, what is the approximate total price for the metal?
    $ 86.11
    $ 100.11
    $ 92.14
    $ 78.14
  • Q5
    Environmental: Refer to theenlarged view of contour lines (in feet) on the topographic map at the right of the page. What is the elevation change between the lines identified by the tips of the two arrows?
  • Q6
    Environmental: A10 horsepower pump is required to produce the desired flow rate for water. The new piping/plumbing system that will beused will reduce the efficiencyof apump12 percent. If the manufacturer of the pump being purchased recommends a 10 percent oversizing of horsepower to compensate for pump inefficiency, what approximate size water pump should be purchasedfor this situation?1.00 = 100%
  • Q7
    Machinery: A portable irrigation pump has a 5.5-inch diameter pulley that must turn at approximately 400 revolutions per minute (rpm). The shaft of the tractor’s PTO that powers the pump rotates at 540 rpm and rotates the pump using a belt and two-pulley system. What is the approximate diameter of the pulley needed on the PTO shaft to turn the pulley on the pump at 400 rpms? Pulley Size Formula: (Diameter of Pulley 1 x Speed of Pulley 1) = (Diameter of Pulley 2 x Speed of Pulley 2)
  • Q8
    Electrical: A water pump for stock tanks has an electrical motor that operates at 120 volts and uses 13.8amps of current. If it is a 1.5horsepower motor and it operates with a power factor of 0.92, what is the approximate efficiency of the motor? 1 horsepower= 746 Watts horsepower = (voltage x amperage x power factor x efficiency) / 746
  • Q9
    Compact Equipment: Which of the following will have the greatest weight in pounds: 4.6 gallons of gasoline, 4.1gallons of diesel, 3.8 gallons of 15W-40 engine oil, or 3.9gallons of automatic transmission fluid? 1 gallon of gasoline = 6.3 pounds 1 gallon of diesel = 6.943pounds 1gallon 15W-40 engine oil = 7.3 pounds 1 gallon automatic transmission fluid = 7.298 pounds
    4.6 gallons of gasoline
    3.8 gallons of15W-40 engine oil
    4.1 gallons of diesel
    3.9 gallons of automatic transmission fluid
  • Q10
    Structural: Which of the following quantities of lumber has the least number of board-feet?1 board-foot =144 cubic inches 1 square foot = 144 square inches
    5boards measuring 2 inches by 10inches by 10feet
    10boards measuring 1 inches by 10inches by 10feet
    7boards measuring 2 inches by 6 inches by 12feet
    10boards measuring 1 inch by 8 inches by 12 feet
  • Q11
    Structural: Four solid round steel rods are 12 feet long and each have a diameter of 2.5 inches. If the rods have a cross sectional tensile strength of 70,000 pounds per square inch, what is the combined maximum tensile strength (approximate value in pounds) for all four rods?Area of a circle= (π) x(radius)2π = 3.14 radius = (diameter ÷2)
    1,131,250 pounds
    1,265,500 pounds
    1,492,000 pounds
  • Q12
    Environmental: The Universal Soil Loss Equation is composed of six factors to predict the long-term average annual soil loss and one of those values is slope of the land area expressed as a percentage. What is the approximate slope (percentage) of the land that changes elevation from 1875 feet to 1384 feet over a distance of 1.24 miles? Slope = (Rise÷Run) x (100% / 1)
  • Q13
    Machinery: What is the approximate speed, in miles per hour, for a fertilizer spreader that travels 110 meters in 1 minute and 6.5seconds?5,280 ft = 1 mile 60 seconds = 1 minute 60 minutes = 1 hour 1 foot = 0.3048 meter
    4.7miles per hour
    3.7miles per hour
    5.2miles per hour
    4.2miles per hour
  • Q14
    Electrical: A 240-volt air conditioning unit uses 63 kilowatt hours of power during 24 hours of operation. What is the approximate size of this air conditioning unit in tons of refrigeration(disregard efficiency)? One ton of air conditioning removes heat at the rate equivalent to melting one ton of ice during a period of 24 hours.Information: British Thermal Unit (BTU): 3412.14BTUs = 1 kilowatt hour 1 Ton of Refrigeration = 12,000 BTUs / hour(the rate of heat removal)
    Two Tons
    One Ton
    One and One-Half Tons
  • Q15
    Compact Equipment: An engine manual requires each head bolt to be torqued to 13 Newton meters (Nm) during reassembly. The torques wrench available is calibrated in foot pounds (ft. lbs.). What approximate torque in ft. lbs. is equivalent to 13Nm? 4.44822 Newtons = 1 pound force 0.22481 pound force= 1 Newton 1 meter = 3.28084 feet 1 foot = 0.3048 meters
    9.6ft. lbs
    7.4ft. lbs
    6.3ft. lbs
    8.5ft. lbs

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