Mech (3)

An economic law which describes the relationship of Demand-Supply-Price

The recommended fertilizer application rate is as follows: 90 kg N, 60 kg P₂O₅, and 30 kg K₂O per hectare. Given the following fertilizer materials: (Urea) 45-0-0, (Superphosphate) 0-20-0, (Muriate of potash) 0-0-60; Find the amount urea needed for one hectare.

What is the ratio of output over input?

A walking type tractor is also known as

Which is not increased by mechanization?

A 4-cylinder four-stroke cycle engine with 3- by 4-in cylinders develops 19 hp at 1650 rpm. Compute the ihp if the mechanical efficiency is 85%.

Why can not the Philippine agriculture be fully mechanized?

An agricultural engineer purchased a new machine for P18,000. It is expected to have a useful life of 10 years and a salvage value of P3,000. At i=15%, how much additional revenue must the machine generate to at least recover its cost?

Three thousand Joules per second is equivalent to

The value of goods and services expressed in monetary equivalent.

Determine the equivalent length of strip to cover 1 hectare of land while planting corn using a 5-60 cm. Grain drill.

The flywheel is the part of the engine which absorbs the power from the crankshaft during the idle strokes and returns it during the power stroke.

Costs that are unaffected by changes in activity level of a farm enterprise are referred to as ___ (x) ___, examples of which include ___ (y) ___.

When two strips of land are finished, the last furrows cut out leave an open trench about twice the width of one bottom called the:

As an agricultural engineer, which one should you avoid to increase Agricultural production in the Philippines?

What is the effective interest rate on 10% nominal rate compounded annually?

It is a special gear driven shaft usually protruding from the backside of the tractor rear axle housing designed to provide power.

A newly purchased grain drill is to be calibrated to determine the appropriate seeding rate. The drill has 10 furrow openers spaced 25 cm apart and is equipped with pneumatic tires. When the grain hopper is filled at half its capacity and the tires are inflated at recommended pressure, the loaded radius is measured at 38 cm. After turning the wheels at 60 rpm for a period of 10 minutes, 13.4 kg of palay were collected from the seed tubes. What is the seeding rate of the drill, in cavans per hectare assuming 1 cavan = 44 kg:

Being on the product possibilities frontier means that:

Smaller gear or any two gears that are meshing.

What is the difference between a change in supply and a change in quantity supplied?

What is the application rate of chemical solution in liters per hectare if 150 liters of solution could be sprayed in 10 minutes by a six-nozzle boom sprayer traveling at 5 kph?

What is the rear wheel reaction for a tractor with a total weight of 28.5 kN, has a front wheel reaction of 9.0 kN on a horizontal surface? The wheelbase is 2083 mm.

The disk angle that will give the minimum draft for a disk plow for a given width of cut is.

A machine purchased for P 45,000 had a depreciable life of 4 years. It will have an expected salvage value of P 5,000 at the end of its depreciable life. Using the-sum-of-the-years digits method, what is the depreciation amount for year 3?

Which of the following is not a classification of farm jobs?

A tractor weighs 8,000 lbs, has a 90-inch wheelbase and a drawbar height of 15 inches. The center of gravity is located 40 inches from the rear axle and 30 inches above the ground. What is the reaction at the front wheel?

The process of replotting of farms, re-adjustment of land, rights, systematic planning and adjustment of  canals, laterals, and farm roads is called

Remote control hydraulic cylinders with internal diameters of 2.5 inches and 3.5 inches with 1000 lbs/in² maximum pressure are available for tractors. What is the maximum force that can be developed by the 3.5-inch cylindrers?

Determine the air-to-fuel ratio by weight for the complete combustion of gasoline in air.

What is most likely the consequence of inappropriate mechanization?

Which of the following is not a benefit from custom hiring?

Power required to pull an implement at a uniform speed.

The term used to mean a farm machine consisting of rotating knives or tines that pulverizes the soil.

Commodity surplus occurs when the selling price is ___ (x) ___, but equilibrium is attained when the sellers agree to sell at a price at which ___ (y)   ___ are willing to buy.

Systematic gathering and recording of farm data

A carabao weighing 2,000 pounds is traveling 1,500 m/h at an instant.  It is pulling a plow whose width of cut is 10 inches and depth of cut is 15 centimeters.  How many horsepower is generated by the carabao at this condition if the draft is b kg/m²?

Systematic gathering, recording, and interpreting of farm data.

A system which converts stream flow into electrical power is known as

In a standard supply-demand diagram, what happens when demand increases?

A certain fluidized-bed combustion vessel has an investment cost of P100,000, a life of 10 years, and negligible market (resale) value. Annual costs of materials, maintenance and electric power for the vessel are expected to total P8000. A major relining of the combustion vessel will occur during the fifth year at a cost of P20,000; during this year, the vessel will not be in service. If the interest rate is 15% per year, the lump-sum equivalent cost of this project at the present time is

Among the following statements, which demonstrate/s efficiency in operations?

Separation of the grains and the straw in a combine harvester is accomplished by what operating parts?

This is the reason why diesel engines are built comparatively sturdier than gasoline engines.

Choose the inappropriate statement:

An engine uses about 0.8 lb of fuel/hp-hr. If the heating value of the fuel is 20,000 Btu/lb, what is the thermal efficiency?

After preliminary test, he found out that 1.5 % of the Super rice grains were totally damaged by metering device. He performed germination test and found out 85% seed viability. The seeds weigh 40 grams per 1000 grains. From this information at what seeding rate (in kg/ha) must he calibrate the seeder to attain a crop stand of 8.0 x 10⁵ rice plants per hectare?

Diminishing returns is observed as a firm increases production by adding variable inputs to at least one fixed input because

An agricultural firm can invest into a 15-year project that will produce an annual revenue of P 200,000 per year. Initial investment required is P 165,000, while yearly operating expenses will be P 145,000. What is the IRR for this opportunity?

Income derived from the sales of output on per unit bases

Mechanical power technology is synonymous to

A market situation represented by one or few sellers of goods.

A man whose average length of step is 0.70m walks beside a tractor that is plowing, maintaining the same speed as the tractor. If he made 100 steps in 36 seconds, what is the drawbar power developed by the tractor, in kW, if the pull averages 20 kN?

The cost of a newly installed feedwater softener in the steam power plant is P 450,000. Its useful life is estimated to be 12 years. The salvage value is 5% of the first cost. The combined annual cost of repairs, maintenance  and labor is P 52,000. The cost of chemicals used per year is P 38,000. Determine the annual cost of the feedwater  softener if the interest on sinking fund is 8%.

What is the maximum drawbar horsepower for a category II type of hitch in a tractor?

A machine using 80% of its rated width has a field efficiency of 70%. How many minutes per hour is the effective operating time?

Which statement is incorrect?

In a 200 ha corn project, the fields have to be tilled in 30 days. What is the width of the heavy offset disk harrow should be selected if the tractor to be used operates at 3.125 mph. Assume a 75% field efficiency and an 8 hour working day.

A sugarcane fertilizer applicator is to apply 16 bags of fertilizer per hectare. The fertilizer applicator is to be calibrated by driving the applicator forward a distance of 200 meters. What is the weight of fertilizer that should be collected from the delivery tube to get the correct application rate (assume 1 bag = 50 kg, row spacing = 1.8 m):

The standard speed of the PTO according to Barger is: