Machinery: A tractor's power take off produces 325 horsepower and turns at 1000 revolutions per minute. Approximately how much torque, in foot-pounds, can this PTO produce? Torque in foot-pounds= (PTO Horsepower x 5252) / (Revolutions / Minute)

Electrical: A water supply station used to refill pesticide tanks has a 4 horsepower electrical pump that operates at 120 volts. If the motor is 85 percent efficient and has a 0.9 power factor, what is the approximate amperage of the motor? horsepower = voltage x amperage x power factor x efficiency 1 horsepower = 746 Watts

Energy: A 200 horsepower eight-cylinder engine is operating at 6865 feet above sea level. What approximate horsepower can beproduced by the engine when the engine’s power is reduced 2.45 percent for each 1000 feet of elevation above sea level?

Structural: A pesticide spray tank has a cylindrical shape that is 7 feet 9 inches long with a radius of 2 feet. What is the approximate total storage capacity of the tank in gallons? 1 gallon = 231 cubic inches 1 foot = 12 inches π = 3.14 Diameter =2 x(radius) Volume of a Cylinder = (π) x (radius)2 x (length) 1728 cubic inches = 1 cubic foot

Environmental: A rectangular shaped plastic hopper is used to transport granular pesticide in bulk. This hopper is transported on a trailer with a 5000-pound maximum load carrying capacity. The internal dimensions of the hopper are 6.5 feet wide, 8.75 feet long and 4.25 feet deep. What is the maximum weight in pounds per cubic foot (approximate value) that granular pesticide can weigh, completely fill the hopper, and still transport within safe load carrying limits?1 gallon = 231 cubic inches 1 cubic-foot = 1728 cubic-inches Volume of rectangular prism= Length x Width x Height

Environmental: What is the approximate annual power consumption (kilowatt-hours, kWh) of a 240 volt electrical installation with 36lights, each light using 0.95amps and operating an average of 9 hours and 30 minutes each day,and 22.5days per month? 1 year = 12 months Kilowatt = 1000 Watts Watts = Volts x Amps Volts = Amps x Resistance in Ohms Kilowatt-hours = Kilowatts x Hours

Machinery: Each cylinder in an eight cylinder tractor engine has a bore (diameter) of 4.85 inches and a piston stroke of 6.25inches. What is the approximate total displacement of this engine in liters? Area of a cylinder bore = (π) x (radius)2π = 3.14 radius = (diameter÷2) Volumetric displacement of a single cylinder = (length of piston stroke) x (the area of the cylinder bore) 1 liter = 61 cubic inches 1 cubic inch = 0.0164 liter

Electrical: An inefficient electrical motor (identified as motor A) is to be replaced with a new high efficiency motor (identified as motor B). Motor A was operated 8 hours and 30 minutes per day, 322 days each year, and its annual electrical bill averaged $18,983. The purchase price for motor B is $1,318 and the installation charge is $390. Motor B will be operated the same number of hours as motor A and will have an average cost of $5.87 per hour to operate. Approximately how many months must motor B operate to payback the purchase and installation cost of the new motor? 1 year = 12 months 1 day = 24 hours 1 year = 365 days Equipment Payback in months = total cost for new high efficient equipment / average saving in energy cost per month

Energy: An available electronic thermometer is calibrated in degrees Celsius (ºC). A pesticide label specifies that the maximum allowable temperature for spray applications is 75 degrees Fahrenheit (ºF). What is the approximate temperature equivalent in degrees Celsius? ºF = (9/5 ºC) + 32 ºC = 5/9 (ºF -32) Water freezes at 32 ºF Water boils at 212 ºF

Structural: Steel angle iron is sold for $2.11 per linear foot, steel rod is sold for $1.91 per linear foot, and steel pipe is sold for $3.19 per linear foot. If 28.5 feet of angle iron, 23 feet of rod, and 15.5 feet of pipe are purchased, what is the approximate total price for the metal before taxes?

Structural: Which of the following quantities of lumber has the greatest number of board-feet?1 board-foot = 144 cubic inches 1 square foot = 144 square inches

Environmental: A concrete slab will be installed to prevent contamination of the ground at a mixing and cleaning site for pesticide equipment. The inside dimensions of the slab’s form boards are 24 feet wide by 14 feet long and the concrete forms provide an approximate depth of 5 inches. Order an additional 10 percent concrete to allow for any inconsistencies in the ground surface and note that pre-mixed concrete is sold/delivered in quarter-yard quantities (such as: 3 yd3, 6.25 yd3, 10.75 yd3, 15.5 yd3). Approximately how many cubic yards (yd3) of pre-mixed concrete should be ordered? 1 cubic yard =27 cubic feet 1 cubic foot=1728 cubic inches 1 foot = 12 inches Volume of rectangular prism= Length x Width x Height

Machinery: Approximately how many acres are in a rectangular field measuring 1109 meters by 928 yards? 1 acre = 43, 560 square feet 1 hectare = 2.47 acres 1 acre = 0.4045 Hectares Area of Rectangle = length x width 1 yard = 3 feet 1 foot = 0.3048 meter

Electrical: A pesticide boom sprayer with eight spray nozzles is mounted on the back of an ATV (4-wheeler) and the pump motor is powered by the 12 volt battery of the vehicle. The spray pump’s range of operation for spraying applications is 20 to 45 pounds per square inch (PSI), but there is a 20% loss in pressure due to the spray system's components. If each nozzle must deliver a range of 0.02 to 0.04 gallons per minute (GPM), which of the following motors is most economical to purchase and also has the appropriate capacity and specifications for this boom sprayer. VDC = direct current voltage VAC = alternating current voltage

Energy: A hot waterline is used 6 hours and 45 minutes each day, has three different water leaks,and the amount of water lost at each leak has been measured during a 30 minute time period. The three quantities of water from the leaks are (a) 75 ounces, (b) 68 ounces, and (c) 111 ounces. Approximately how many gallons of water will be lost from the waterline during 100 days of operation? 1 gallon = 128 ounces 24 hours = 1 day 60 minutes = 1 hour

Energy: A water pump has a 4.75-inch diameter pulley that must turn at 800 revolutions per minute (rpm). The shaft of an electric motor rotates at 1725 rpm and powers the belt that operates the pump. What is the approximate diameter of the pulley needed on the motor shaft to turn the pump at 800 rpms?Pulley Size Formula: (Diameter of Pulley 1 xSpeed of Pulley 1) = (Diameter of Pulley 2 x Speed of Pulley 2)

Structural: There is concern that the numerical values marked on a 500 gallon pesticide spray tank are inaccurate and water weight will be used to determine and confirm tank volume values. The weight of the empty tank is 92 pounds. What should the approximate combined weight (pounds, lbs) be for the tank and water if the test weights are done at 100 gallons, 250 gallons and 500 gallons? 1 gallon of water = 8.34 pounds

Environmental: If the delivery rate (gallons per minute) of a worn or damaged spray tip on a boom sprayer exceeds 10% (higher or lower) of the average for all of the nozzles, then that nozzle's spray tip should be replaced. The following delivery rates (in ounces; oz) were measured during a 20-second time period. Which if any nozzle spray tips should be replaced? Tip1 = 13.5oz; Tip 2 = 12 oz; Tip 3 = 10.5 oz; Tip 4 = 12.5 oz; Tip 5 = 13 oz; Tip 6 = 14oz

Electrical: The interior electrical lighting of a farm structure is being replaced with high efficiency lighting. The 24 incandescent,200-Watt lights will be replaced with 24 LED,50-Watt lights. If the lights are operated 88 hours per month and electricity cost 10 cents per kilowatt-hour (kWh), what is the approximate reduction in electrical power costs each month? 1000 Watts = 1 kilowatt

Electrical: Three incandescent light bulbs (100 Watts, 200 Watts, 300 Watts) are operating in a 120 volt circuit. If each bulb operates at its rated wattage, which of the following statements is correct in regard to the operation of the bulbs? Wattage = Voltage x Amperage Voltage = Amperage x Resistance

Energy: An electric water heaters uses 880 kilowatt-hours (kWh) of power each day. If electric power cost 11.5cents per kWh, approximately how much energy (in therms) does this water heater use during 22 days of operation? British Thermal Unit = BTU 1 kWh = 3412.3 BTUs of energy 1 therm of energy = 100,000 BTUs of energy

Structural: A round concrete column is fabricated using 2.25 cubic yards of concrete. If the concrete column is 2 feet 4 inches in diameter, what is the approximate height of the column? 1 cubic yard = 27 cubic feet 1 cubic foot = 1728 cubic inches 1 foot = 12 inches Volume of cylinder = pi × (cylinder radius)2 × cylinder height pi= 3.14 diameter = (2 × radius)

Environmental: A large volume of water contaminated with liquid pesticide (water and liquid pesticide) was collected from the runoff of a mixing and loading concrete pad. Initially the liquid is 6% pesticide and 94% water. Over the summer much of the water evaporates and only 42% of the water remains. All of the pesticide still remains. What is the approximate percentage of pesticide in the remaining liquid?

Machinery: A tractor powered herbicide boom sprayer with 24 spray nozzles, spaced 20 inches apart,is setup and calibrated to spray weeds in forage crops. The sprayer delivers a herbicide and water mixture at a uniform rate of 17.5 gallons per acre, travels at 4.75 miles per hour (MPH),and operates at a spray pressure of 30 pounds per square inch (PSI). An unusually high weed infestation requires an increase in the application of the herbicide mixture to 20 gallons per acre (GPA). Which of the following changes to one of the sprayer's operating parameters will most closely achieve 20 GPA? (Gallons Per Minute)/Nozzle= (GPA x MPH x Nozzle Spacing in Inches)/5940 Pressure Formula: New PSI = (Original PSI) x (New GPM ÷Original GPM)2