Mechanization, Power, Machinery & Equipment & Allied Subjects (HIGH PRIO) Flashcards
Which of the following is not part of a force pump?
a. inlet valve
b. piston
c. plunger
d. discharge valve
b. piston
What do you call a device that forces more fuel mixture into the cylinders than would be drawn in under normal atmospheric conditions, thus making possible greater power output with the same piston displacement?
a. carburetor
b. supercharger
c. throttle
d. venturi
b. supercharger
Arrange the following according to the management process.
i. Selecting the right employees for the right position
ii. Formulation of the mission, vision, goals, objectives and activities of the organization
iii. Conducting of annual performance evaluation of employees.
iv. Coordinating the employees and material resources of the organization.
v. Orientation of personnel for the proper achievement of goals.
a. i, ii, iii, iv, v
b. ii, iv, I, iii, v
c. ii, I, v, iv, iii
d. ii, iv, I, v, iii
d. ii, iv, I, v, iii
The gasoline engine is characterized as:
a. low first cost – high operating cost
b. low first cost – low operating cost
c. high first cost – high operating cost
d. high first cost – low operating cost
a. low first cost – high operating cost
The thermal efficiency and mechanical efficiency of an engine are 40% and 72%, respectively. Determine the power equivalent of the fuel used if the brake horsepower is 1.35 hp.
a. 2.0 kW
b. 4.0 kW
c. 2.5 kW
d. 3.5 kW
d. 3.5 kW
A belt delivers a tangential force of 150 N on a half meter radius pulley at a speed of 380 rev/min. What will be the power?
a. 2.0 kW
b. 0.5 kW
c. 3.0 kW
d. 3.5 kW
c. 3.0 kW
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.
a. X = High; Y = Vendors
b. X = Low; Y = Vendors
c. X = Low; Y = Consumers
d. X = High; Y = Consumers
d. X = High; Y = Consumers
For a 4-inch by 4-inch centrifugal pump with discharge of 250 gpm, determine the size of the diesel engine. Efficiency of the pump is 65%, of
the belt transmission is 95%, and of the air-cooled system is 80%. Total head is 30 ft.
a. 2.9 hp
b. 3.1 hp
c. 3.8 hp
d. 2.5 hp
c. 3.8 hp
Which pair is mismatched?
a. consumer good – personal effects
b. service – housecleaning
c. inelastic demand – food
d. producer good – clothes
d. producer good – clothes
Of corresponding size and speed, single-cylinder engines compared to multi-cylinder engines will require __________ flywheels.
a. Lighter
b. thinner
c. heavier
d. a or b
c. heavier
The windmill for water pumping is characterized as:
a. low torque – high speed
b. high torque – high speed
c. high torque – low speed
d. low torque – low speed
c. high torque – low speed
If money is worth 8.7% simple interest, how long (in months) from today will the value become P37,501.50 of a debt of P36,000.50 due 6 months from today?
a. 0
b. 2
c. 4
d. 12
d. 12 months
FV = PVxrxt
t = (37,501.5)/(0.087x36,000.50) = 12
Which of the following agencies is not based in a university?
a. AMTEC
b. PhilSCAT
c. AMDP
d. PCARRD
d. PCARRD
a. AMTEC -UPLB
b. PhilSCAT -CLSU
c. AMDP -UPLB
The following are considered discounted measures of project worth, except:
a. payback period
b. internal rate of return
c. benefit-cost ratio
d. net present value
a. payback period
General-purpose tillage involves cutting and pulverizing the soil to a depth of:
a. up to 3 inches
b. up to 6 inches
c. up to 12 inches
d. up to 18 inches
b. up to 6 inches
Bend downward of the point of the share to make the plow penetrate the soil to the proper depth is:
a. tilt angle
b. disc angle
c. horizontal suction
d. vertical clearance
d. vertical clearance
Width of cut of the disc plow is influenced by:
a. disc diameter
b. depth of cut
c. disc angle
d. all of the above
d. all of the above
In the equation C = SWEff/10, W is width of cut expressed in:
a. ft.
b. m
c. km
d. mile
b. m
General-purpose tillage equipment is used in:
a. 2-wheel tractor for wetland op.
b. 4-wheel tractor for dryland op.
c. 4-wheel tractor for wetland op.
d. all of the above
d. all of the above
Planter designed to place seedlings in rows and in hills is called:
a. row-crop drill planter
b. hill-drop planter
c. solid drill planter
d. transplanter
d. transplanter
The IRRI drum seeder is an example of:
a. row-crop drill planter
b. hill-drop planter
c. solid drill planter
d. broadcaster
c. solid drill planter
In the equation for horsepower, Hp = QH/3960Eff, H is total head in:
a. ft.
b. ft/min
c. meters
d. meters/min
a. ft.
The power unit for driving centrifugal pumps for household use is usually:
a. electric motor
b. gasoline engine
c. diesel engine
d. kerosene engine
a. electric motor
The most recently developed system of harvesting and threshing of rice is:
a. mechanical harvesting & threshing
b. combining
c. stripping
d. all of the above
c. stripping
A machine that cuts standing crop, conveys the cut crop to one side, and lays them down in an orderly manner is called:
a. sickle
b. reaper-windrower
c. reaper-binder
d. stripper
b. reaper-windrower
The Japanese combine is characterized as:
a. low power & hold-on feeding
b. low power & throw-in feeding
c. high power & hold-on feeding
d. high power & throw-in feeding
a. low power & hold-on feeding
A 4-ha field was plowed using a three-bottom 12-inch tractor-mounted moldboard plow. It took 11 hrs to complete the operation at a tractor speed of 5 kph. Find the theoretical field capacity:
a. 0.46 ha/hr
b. 1.45 ha/hr
c. 1.13 ha/hr
d. 1.8 ha/hr
a. 0.46 ha/hr
How many times greater is the power of a carabao over man?
a. 0.1
b. 1.0
c. 10
d. 100
c. 10
The fertility of a particular field is such that maximum corn yield is obtained with a population of 54,000 plants per hectare. A checkrow corn planter is used which discharges 2 seeds/hill. Average emergence is 85%.
Row spacing = hill spacing. Find the spacing:
a. 0.56 m
b. 0.75 m
c. 0.65 m
d. 1.0 m
a. 0.56 m
Nh = (54,000 plants)/(0.85x2 seeds/hill) = 31765 hills
Rs x Hs = (10,000 m2)/31765 hills = 0.31 m2
Rs = sqrt(0.31) = 0.56 m
Select two consecutive farm operations which when done mechanically can
increase cropping intensity:
a. planting – spraying
b. irrigation – weeding
c. harvesting – plowing
d. harvesting – threshing
c. harvesting – plowing
Which of the following operation is not done by a stripper?
a. cutting of standing crop
b. stripping
c. cleaning of grains
d. conveying of grains to the tank
a. cutting of standing crop
The cutting mechanism most commonly employed by reapers and combines is:
a. slicing & tearing
b. high velocity, single-element, impact action
c. two-element, scissor-type action
d. all of the above
c. two-element, scissor-type action
The IRRI axial-flow thresher is characterized as:
a. low power & hold-on feeding
b. low power & throw-in feeding
c. high power & hold-on feeding
d. high power & throw-in feeding
d. high power & throw-in feeding
What section is not yet included in the PAES as of 2014?
a. Production/postharvest machinery
b. Irrigation and drainage
c. agricultural structures
d. engineering materials
b. Irrigation and drainage
A 4-ha field was plowed using a three-bottom 12-inch tractor-mounted moldboard plow. It took 11 hrs to complete the operation at a tractor speed of 5 kph. Find the actual field capacity:
a. 0.09 ha/hr
b. 0.5 ha/hr
c. 0.36 ha/hr
d. 1.5 ha/hr
c. 0.36 ha/hr
AFC = 4 ha / 11 hrs = 0.36 ha/hr
Which is true about V-belt and pulley drive?
a. It cannot be used for long center distance drive.
b. Efficiency drops with small pulley size.
c. Its application is limited only for parallel drive.
d. Excessive high load increases efficiency.
b. Efficiency drops with small pulley size.
Parameter not required in determining the field capacity of a planter:
a. width of planter
b. forward speed of planter
c. No. of seeds per hill
d. efficiency of planter
c. No. of seeds per hill
Type of soil working parts utilized by push-type weeders for wetland operation:
a. blade type
b. tine type
c. rotary type
d. all of the above
c. rotary type
Which of the following is not measured in calibrating a sprayer?
a. nozzle discharge
b. effective working width
c. walking speed
d. application rate
d. application rate
Which of the following does not belong to the group of positive displacement pumps?
a. lift pump
b. force pump
c. rotary pump
d. propeller pump
d. propeller pump
According to the National Irrigation Administration (NIA), water requirement for rice production is:
a. 5 mm/day
b. 10 mm/day
c. 15 mm/day
d. 20 mm/day
b. 10 mm/day
If the specific yield of a particular well is 3 gpm/ft drawdown and the discharge rate of the pump is 30gpm, the total drawdown is:
a. 1 ft
b. 3 ft
c. 10 ft
d. 30 ft
c. 10 ft
Total drawdown = (30 gpm)/(3 gpm/ft-drawdown)
It is made by partial combustion of carbonaceous substances like coal and wood.
a. natural gas
b. propane
c. LPG
d. producer gas
d. producer gas
The tractor is generally characterized as:
a. high speed – heavy load
b. high speed – light load
c. low speed – heavy load
d. low speed – light load
c. low speed – heavy load
A farmer figured that he needed 8 pieces 2” x 4” x 12’ and 10 pieces 2” x 3” x 12’ lumber to make tables and chairs for their barangay hall. He availed them from a newly-opened local
hardware shop, named J.E.R. Hardware Supplies,
which charges P25 for every board foot of
lumber. However, to gain patronage, the shop gave 15% discount for the first 50 board feet of
purchased lumber. How many board feet of lumber are needed for the farmer’s project?
a. 248
b. 156
c. 62
d. 124
bd.ft. (ft^2-in) = 8(2x4x12)/12 + 10(2x3x12)/12
d. 124
How many degrees has the crankshaft rotated if the piston has traveled 4.25 cm with respect to its top dead position in a 3.5” by 5” diesel engine?
a. 60 degrees
b. 45 degrees
c. 90 degrees
d. 75 degrees
a. 60 degrees
180 degrees per stroke.
4.25 cm / 5 in (2.54 cm/in) = 0.33
33% of 180 = 60 degrees
The three main sources of power for mechanization include:
a. human, animal & mechanical
b. human, electrical & mechanical
c. animal, electrical & mechanical
d. human, animal & electrical
a. human, animal & mechanical
Before the adoption of mechanized harvest and postharvest operations for rice, field losses were:
a. 5 – 15%
b. 10 – 27%
c. 10 – 37%
d. 20 – 30%
c. 10 – 37%
In optimizing the capacity of a machine, it is recommended to have:
a. one small machine
b. one big machine
c. two or more small machines
d. all of the above
c. two or more small machines
Primary tillage involves cutting the soil to a depth of:
a. up to 3 inches
b. 3 to 6 inches
c. 6 to 18 inches
d. 6 to 36 inches
d. 6 to 36 inches
Primary tillage equipment that cuts the soil to a depth of 6 to 18 inches is called:
a. moldboard plow
b. subsoiler
c. chisel plow
d. spiral plow
a. moldboard plow
The perpendicular distance between the wing and point of the share determines the:
a. longitudinal dimension of plow
b. transverse dimension of plow
c. diagonal dimension of plow
d. maximum dimension of plow
b. transverse dimension of plow
Draft of plows is primarily determined by:
a. type of soil
b. speed of plowing
c. sharpness of cutting edge
d. overall adjustment of plow
a. type of soil
How many volumes of PAES were adopted by the Department of Agriculture?
four
A 4-ha field was plowed using a three-bottom 12-inch tractor-mounted moldboard plow. It took 11 hrs. to complete the operation at a tractor speed of 5 kph. Find the theoretical field capacity:
a. 0.46 ha/hr
b. 1.45 ha/hr
c. 1.13 ha/hr
d. 1.8 ha/hr
a. 0.46 ha/hr
TFC = SW/10
TFC = (3)(12 in)(0.0254 m/in)(5 kph)/10
The acronym PAES means:
a. Philippine Agricultural Engineering Society
b. Professional Agricultural Engineering Society
c. Philippine Agricultural Engineering Standards
d. Professional Agricultural Engineering Standards
c. Philippine Agricultural Engineering Standards
The development of PAES started in:
a. 1985
b. 1990
c. 1995
d. 2000
d. 2000
The word used to indicate requirements strictly to be followed in order to conform to the standard and from which no deviation is permitted:
a. Shall
b. Should
c. a or b
d. none of the above
a. Shall
The Consumer Act of the Philippines of is covered under:
a. DA AO 11 S2001
b. PRC BR 05 S2002
c. RA 7394
d. RA 8559
c. RA 7394
Agency of the government charged with the development of the Philippine National Standards (PNS):
a. BOAE-PRC
b. NAFC-DA
c. BPS-DTI
d. DOH
c. BPS-DTI
Two persons are threshing by “Hampasan” method. What is the total human power generated by the two persons in one day if they work at an average of 6 hours?
a. 0.5 hp/person; 1.0 hp
b. 0.15 hp/person; 0.30 hp
c. 0.11 hp/person; 0.22 hp
d. 0.12 hp/person; 0.24 hp
c. 0.11 hp/person; 0.22 hp
Power of mature human being = 0.1 hp
Closest in the choices is 0.11 hp.
It is the peak of the turned furrow slice.
a. Furrow crown
b. Furrow slice
c. Furrow wall
d. None of the above
a. Furrow crown
Threshing efficiency basically is determined from weight of grain obtained at the ___ to the grain input fed at the feeding trays.
a. straw outlet
b. oscillating screen outlet
c. blower outlet
d. All of the above
a. straw outlet
Grain-straw ratio requirement for testing a rice thresher ranges from ___.
a. 0.35 to 0.50
b. 0.50 to 0.65
c. 0.65 to 0.80
d. All of the above
b. 0.50 to 0.65
Ignition of fuel in a gasoline fuel engine usually starts when the piston is __________.
a. at the top dead center
b. moving downward the bottom dead center
c. approaching the top dead center
d. None of the above
c. approaching the top dead center
It is the power developed by the engine of a tractor which is available for pulling, dragging or similar tractive effort.
a. belt horsepower
b. brake horsepower
c. drawbar horsepower
d. indicated horsepower
c. drawbar horsepower
One way of increasing engine power is to force more air into the cylinder so that more power can be produced from each power stroke. This process which uses a type of air compression device powered by the engine crankshaft is
called:
a. turbocharging
b. supercharging
c. power charging
d. air charging
b. supercharging
The mechanical manipulation of soil for any purpose.
a. Land grading
b. Tillage
c. Earth moving
d. None of the above
b. Tillage
The pushing or rolling of soil by a steeply inclined blade.
a. Bulldozing
b. Chiselling
c. Subsoiling
d. None of the above
a. Bulldozing
The draft of a plow is dependent on the ___.
a. size of the plow
b. plowing depth
c. type of soil
d. All of the above
d. All of the above
The factors that affect the draft of the plow:
a. Soil condition
b. Hitch to the tractor
c. Topography
d. All of the above
d. All of the above
What is the force required to pull a single-moldboard plow on a clay-loam soil having a width and depth of cut of 30 cm and 15 cm, respectively. Soil draft is 8 psi.
a. 314 kg
b. 253 kg
c. 157 kg
d. None of the above
b. 253 kg
F = (30 cm)(15 cm)(1 in/2.54 cm)^2(8 psi)(1 kg/2.2 lb) = 253 kg
The effective field capacity of the rotary tiller tilling theoretically at 0.4 ha/hr for efficiency of 85% is ___.
a. 0.34 ha/hr
b. 0.24 ha/hr
c. 0.43 ha/hr
d. None of the above
a. 0.34 ha/hr
The effective field capacity of 2 moldboard plows having 25-cm width each plowing at a speed of 7 km/hr for a field efficiency of 80% is ___.
a. 0.20 ha/hr
b. 0.28 ha/hr
c. 0.32 ha/hr
d. 0.35 ha/hr
b. 0.28 ha/hr
A mechanically-operated machine that removes weeds or grasses from the crops.
a. Seeder
b. Weeder
c. Cultivator
d. None of the above
b. Weeder
The ratio between the number of weeds removed by the weeder to the number
of weeds present per unit area.
a. Weeding index
b. Weeding rate
c. Weeding capacity
d. None of the above
a. Weeding index
When a machine is driven directly from the shaft of a power source, the power is transmitted using ___.
a. gear drive
b. sprocket and chain drive
c. direct drive
d. None of the above
c. direct drive
If 10-Hp engine drive has a belt capacity rating of 4.5 hp per belt, how many pieces of belts are needed for the drive?
a. 1 to 2 belts
b. 2 to 3 belts
c. 4 to 6 belts
d. None of the above
b. 2 to 3 belts
A rice thresher is to be driven by a 10-hp gasoline engine using V-belt drive. The engine speed is 1800 rpm while the thresher cylinder speed is 650 rpm. The diameter of the engine pulley is 4 inches. What will be the recommended diameter of the thresher’s pulley?
a. 6 in.
b. 11 in.
c. 14 in.
d. None of the above
b. 11 in.
What is the recommended belt size for the B-type V-belt needed for the drive if its engine pulley and thresher pulley are 4 in and 11 in, respectively, and if its center distance is 60 in.?
a. B169
b. B144
c. B196
d. None of the above
b. B144
The recommend size of the shaft for the thresher above is ___.
a. ½ in.
b. ¾ in
c. 1 in
d. None of the above
b. ¾ in
A diesel engine that operates at 2500 rpm will be used to drive an irrigation pump, which should turn at 1000 rpm. The pulley diameter for the pump is 4 inches. What is the recommended pulley diameter for the engine?
a. 2 in.
b. 4 in.
c. 10 in.
d. None of the above
a. 2 in.
The ratio between the mass of fuel consumed per unit time and the corresponding power measured.
a. Specific fuel consumption
b. Fuel to mass ratio
c. Fuel consumption rate
d. None of the above
a. Specific fuel consumption
Assume that you are the Agricultural Engineer in-charge of a 500-hectare corn farm with soil type that gives 10 psi draft when plowing at a speed of 4 km/hr. Compute the drawbar horsepower required to pull a three-disk plow with 12 inches effective cut per disk at 6 inches plowing depth.
a. 14.3 hp
b. 23.4 hp
c. 34.5 hp
d. None of the above
a. 14.3 hp
Calculate the drawbar hp required to pull a plow with 3X14-in bottoms at the rate of 3.25 mph if the specific draft is 8 psi and depth of cut is 7
inches.
a. 6.8 hp
b. 13.6 hp
c. 20 hp
d. 27.2 hp
c. 20 hp
As a rule of thumb, single-phase alternating current electric motor should be used for applications requiring:
a. < 4 hp
b. < 5 hp
c. < 6 hp
d. < 7 hp
b. < 5 hp
The projection of cash inflow and outflow of a farm to estimate the incremental net benefit of the life of the project is known as:
a. Farm budget
b. Farm plan
c. Farm inventory
d. Farm contract
a. Farm budget
The gearbox placed on first gear will develop…
a. high torque - high speed
b. low torque – low speed
c. high torque – low speed
d. low torque – high speed
c. high torque – low speed
Tractor A can cover a 1-Ha field in 2 hrs, tractor B in 3 hrs, and tractor C in 6 hrs. How long will it take to cover a 1-Ha field if the three tractors worked together?
a. 0.5 hr
b. 1.0 hr
c. 1.5 hr
d. 2.0 hr
b. 1.0 hr
A transaction by your company this year involving the repayment in cash of a portion of the long-term loan of the company in the amount of P 70,000.00 would have the following effect:
a. increase in assets = increase in liabilities
b. decrease in assets = decrease in liabilities
c. increase in assets = increase in ownership
d. increase in one asset= decrease in another asset
decrease in assets = decrease in liabilities
It results in the reduction of the purchasing power of monetary unit.
a. deflation
b. devaluation
c. incision
d. inflation
d. inflation
A six-bottom moldboard plow is to be used to plow a heavy soil. How many scrapers are there in the plow?
a. 2
b. 4
c. 6
d. None of the above
d. 0
It is a part of the plow that connects the plow bottom and the frame.
a. Upper hitch point
b. Boom
c. Shank
d. None of the above
c. Shank
Material recommended by PAES for use as implement frame.
a. Mild steel
b. Cold rolled steel
c. Spring steel
d. None of the above
a. Mild steel
Material recommended by PAES in the manufacture of disk blade.
a. Mild steel
b. Carbon steel
c. Cast iron
d. None of the above
b. Carbon steel
When a disk harrow consists of a front and rear gangs and is centrally positioned with the tractor, it is classified as _________?
a. Single action harrow
b. Double action harrow
c. Offset harrow
d. None of the above
b. Double action harrow
When a disk harrow consists of a front gang only and is centrally positioned with the tractor, it is classified as _________?
a. Single action harrow
b. Double action harrow
c. Offset harrow
d. None of the above
a. Single action harrow
When a disk harrow consists of a front and/or rear gangs and is not centrally positioned with the tractor, it is classified as _________?
a. Single action harrow
b. Double action harrow
c. Offset harrow
d. None of the above
c. Offset harrow
The angle between the axis of the set of disks and the line perpendicular to the direction of the implement.
a. Disk angle
b. Gang angle
c. Implement angle
d. None of the above
b. Gang angle
The horizontal seed plate is used for:
a. row-crop drill planter
b. hill-drop planter
c. solid drill planter
d. broadcaster
b. hill-drop planter
Planters designed to plant seeds continuously in rows with row spacing greater than 36 cm is called:
a. row-crop drill planter
b. hill-drop planter
c. solid drill planter
d. broadcaster
a. row-crop drill planter
The groundwheel of a planter is normally related to the operation of the:
a. furrow opener
b. metering device
c. seed tube
d. double-disc closer
b. metering device
Part of a planter that is always present in all planters regardless of type and cropping system:
a. furrow opener
b. metering device
c. seed tube
d. furrow closer
b. metering device
Two kilogram of rice is to be prepared for cooking. Estimate the time required to cook it.
a. 10.92 min
b. 11.92 min
c. 12.92 min
d. 13.92 min
b. 11.92 min
tc = 550 (2 kg)^0.38
A spark ignition engine was tested with BHP output of 9.6 horsepower. If the ambient condition during the test is 30°C ambient air temperature, what is the corrected BHP of the engine? The total atmospheric air condition is
1011 mbar.
a. 7.78 hp
b. 6.78 hp
c. 9.78 hp
d. 8.78 hp
c. 9.78 hp
Planter designed to plant seeds in rows and in hills is called:
a. row-crop drill planter
b. hill-drop planter
c. solid drill planter
d. broadcaster
b. hill-drop planter
The adjustable orifice with agitator is used for:
a. row-crop drill planter
b. hill-drop planter
c. broadcaster
d. transplanter
a. row-crop drill planter
Parameter not required in the calibration of a planter is:
a. row spacing
b. ave. seed emergence
c. forward speed
d. groundwheel diameter
c. forward speed
Using the specifications of the transmission system of the metering devise (horizontal seed plate) of the two-row corn planter, determine the expected hill spacing. Row spacing = 75 cm, groundwheel diameter = 60 cm,
no. of cells of seedplate = 20, T1 = 6t, T2 = 18t,
T3 = 10t and T4 = 25t
a. 0.62 m
b. 0.81 m
c. 0.71m
d. 0.92 m
c. 0.71 m
A person is working for 4 hours in a farm harvesting. Estimate the power that can be generated by the person in doing the job.
a. 0.13 hp
b. 0.33 hp
c. 0.53 hp
d. 0.43 hp
a. 0.13 hp
Method of pest control not considered engineering control is:
a. chemical control
b. biological control
c. mechanical control
d. a and b
b. biological control
Sprayers are used primarily for the application of :
a. herbicides
b. insecticides
c. fungicides
d. pesticides
d. pesticides
Which of the following is not a spray nozzle pattern?
a. hollow cone nozzle pattern
b. solid cone nozzle pattern
c. hollow fan nozzle pattern
d fan nozzle pattern
c. hollow fan nozzle pattern
Operation with the highest manual labor requirement for lowland rice:
a. plowing with carabao
b. hand transplanting
c. weeding with push-type weeder
d. manual harvesting
c. weeding with push-type weeder
Principle used in creating hydraulic energy in a lever-operated knapsack sprayer is:
a. adding air to a container with fixed volume of liquid
b. adding liquid to a container with a fixed volume of air
c. adding liquid to a container with an existing volume of liquid
d. adding air to a container with an existing volume of air
b. adding liquid to a container with a fixed volume of air
If mechanical work is done at a rate of 1 ft-lb/sec, what is its equivalent in watts?
a. 43.7
b. 746
c. 0.74
d. 1.356
d. 1.356
A water stream had the following data: average width = 12 ft average depth = 2 ft; velocity per minute = 15 head = 4 ft. What is the theoretical power available from the stream?
a. 2.72
b. 1.41
c. 207.31
d. 414.6
a. 2.72
A multi-sail type windmill for pumping water has a diameter of 6 ft and the wind velocity is 10 mph. Estimate the actual power of this windmill.
a. 0.06
b. 0.77
c. 5.45
d. 2.42
a. 0.06
A 1,000 lb horse working continuously for several hours and walking at a rate of 2 ½ mph can develop how much power?
a. 1.33
b. 1.0
c. 0.67
d. 10
c. 0.67
It is a self-propelled machine having a single axle designed primarily to pull and propel trailed or mounted agricultural implement and machinery.
a. Walking-type tractor
b. Pedestrian tractor
c. Hand tractor
d. All of the above
d. All of the above
Warranty period for hand tractor from the purchase of the machine.
a. 4 months
b. 6 months
c. 12 months
d. All of the above
b. 6 months
A metal sheet with gauge number equal to 14 means___.
a. 14-mm thick
b. 14 pieces of metals sheet in a stock
c. 14 pieces in one-inch thickness
d. None of the above
c. 14 pieces in one-inch thickness
The required water temperature in testing pump.
a. 10°C and below
b. 10°C - 40°C
c. 40°C - 60°C
d. None of the above
b. 10°C - 40°C
The criteria used in evaluating the performance of a machine.
a. Reliability of machine
b. Environment and safety
c. Cost of operation
d. All of the above
d. All of the above
The development of a desirable soil structure for a seedbed does not include:
a. higher water infiltration rate
b. increased water surface runoff
c. greater water holding capacity
d. promotion of root penetration
b. increased water surface runoff
Soil cut, lifted, inverted and thrown to one side of the blow bottom is termed:
a. furrow
b. furrowslice
c. backfurrow
d. Deadfurrow
b. furrowslice
Bend sideward of the point of the share to make the plow cut the proper width is:
a. vertical clearance
b. horizontal suction
c. disc angle
d. tilt angle
b. horizontal suction
The angle the disc of a disc plow makes with the direction of travel to make it cut the proper width and allow it to rotate when moving forward is:
a. 15 – 25 degrees
b. 42 – 45 degrees
c. 55 – 60 degrees
d. 30 – 36 degrees
b. 42 – 45 degrees
In the equation C = SWEff/10, C is capacity expresses in:
a. m2/h
b. m2/day
c. ha/h
d. ha/day
c. ha/h
Floating power tillers are used in:
a. 2-wheel tractor for wetland op.
b. 2-wheel tractor for dryland op.
c. 4-wheel tractor for wetland op.
d. 4-wheel tractor for wetland op
a. 2-wheel tractor for wetland op.
The mechanical function of the planter does not include:
a. sort the seeds
b. meter the seeds
c. deposit the seeds
d. cover the seeds
a. sort the seeds
Which of the following belong to the group of variable displacement pump?
a. centrifugal pump
b. mixed flow pump
c. air lift pump
d. all of the above
d. all of the above
In the equation for horsepower, Hp = QH/3960Eff, Eff is:
a. efficiency of pump
b. efficiency of transmission
c. efficiency of prime mover
d. efficiency of the system
d. efficiency of the system
The direct type of power transmission system has: (code 52)
a. 90% Eff
b. 95% Eff
c. 98% Eff
d. 100% Eff
d. 100% Eff
Select two consecutive farm operations which when done mechanically can increase cropping intensity:
a. planting – spraying
b. irrigation – weeding
c. harvesting – plowing
d. harvesting – threshing
c. harvesting – plowing
1 pk is equal to ____________ watts
a. 735.49
b. 740.12
c. 760.00
d. None of the above
a. 735.49
The three-phase electric motor is characterized as.
a. low first cost – high operating cost
b. low first cost – low operating cost
c. high first cost – high operating cost
d. high first cost – low operating cost
b. low first cost – low operating cost
Indicates the maximum load that can be safely carried by an electric motor under continuous operation:
a. duty rating
b. service factor
c. hp rating
d. current rating
b. service factor
The piston goes up and the two valves remain closed is termed:
a. intake
b. compression
c. power
d. exhaust
b. compression
Type of transmission system where the speed ratio depends on the teeth ratio of the two members:
a. gears
b. chain and sprocket
c. belt and pulley
d. a and b
d. a and b
The thermal efficiency range for internal combustion engines is:
a. 25 – 36%
b. 36 – 50%
c. 50 – 75%
d. 75 – 90%
a. 25 – 36%
A valve operates:
a. once per cycle
b. twice per cycle
c. 3X per cycle
d. 4X per cycle
a. once per cycle
In a compression-ignition engine, the fuel is introduced into the
cylinder at the:
a. start of intake
b. start of compression
c. end of intake
d. end of compression
d. end of compression
What is the wheel axle power of a four-wheel tractor whose engine power is equal to 150 Hp. The mechanical efficiency is 85%.
a. 117.5 hp
b. 127.5 hp
c. 137.5 hp
d. 157.5 hp
b. 127.5 hp
BHP = (0.85)(150 hp) = 127.5 hp
If an electric motor rated at 220 volts and 4.8 amperes is converted to 110 volts, then its rated current will be:
a. 2.4 A
b. 4.8 A
c. 7.2 A
d. 9.6 A
d. 9.6 A
(220V)(4.8 A) = (110V)(X)
Calculate the maximum starting current for a ½-hp, 220-volt electric motor with an H motor code (6.3 – 7.1 KVA/Hp).
a. 14 A
b. 15 A
c. 16 A
d. 17 A
b. 15 A
(1/2 Hp)(6.3+7.1/2)KVA/Hp(1000)/(220V)
If the amount of heat used in removing moisture from the grains in a continuous-flow dyer is 3000 kJ/hr, what is the heat utilization efficiency
if the burner uses 6000 kJ/hr of fuel?
a. 20%
b. 40%
c. 39%
d. 50%
d. 50%
(3000 kJ/hr/6000 kJ/hr) x 100%
Cleaning units for rice husk gasifier to remove gaseous pollutant and solid particles while cooling the gas at the same time.
a. Cyclone separator
b. Fabric filter
c. Scrubber
d. All of the above
c. Scrubber
Seed produced by the Seed Production and Health Division form UP and certified 100% pure by the Seed Quality Control Services of the Bureau of Plant Industry.
a. Certified Seeds
b. Registered Seeds
c. Foundation Seeds
d. Breeder Seeds
d. Breeder Seeds
1 cv is equal to _________ watts
a. 735.50
b. 740.12
c. 760.00
d. None of the above
a. 735.50
Energy conversion efficiency (percent) of electric motors is:
a. 25 – 30
b. 30 – 36
c. 36 – 50
d. 50 – 90
d. 50 – 90
If you invest P50,000 today at 9% interest, how much time is required for the investment to be worth P125,000?
a. 9 years
b. 10 years
c. 11 years
d. 12 years
c. 11 years
A=P(1+r)^t
125000=50000(1+0.09)^t
It is the percentage ratio of the time a machine is effectively operating to the total time the machine is committed to the operation.
a. Operating time efficiency
b. Time efficiency
c. Effective time efficiency
d. All of the above
b. Time efficiency
Materials used to securely join separate parts of an object or structure are called
a. binders
b. fasteners
c. holders
d. clippers
b. fasteners
Determine the time in hours to plow a 3-ha field using a 15-cm animal-drawn plow at a speed of 4 kph and efficiency of 75%
a. 56 hrs
b. 66 hrs
c. 76 hrs
d. 86 hrs
b. 66 hrs
Area/EFC
Determine the no. of days (8hrs/day) to plow a 10-ha field using a 3-bottom moldboard plow drawn by a 4-wheel tractor at a speed of 5 kph and field efficiency of 76%. The width of cut of one bottom is 33 cm.
a. 2.75 days
b. 3.0 days
c. 3.3 days
d. 3.6 days
Area/(EFC*8hrs/day)
Planter designed to plant seeds in rows and in hills is called
a. row-crop drill planter
b. hill-drop planter
c. solid drill planter
d. broadcaster
b. hill-drop planter
Which of the following agencies does not belong to the Department of Agriculture?
a. BPRE
b. BPI
c. AMMDA
d. RAEG
c. AMMDA
Which of the following statements is true?
a. The velocity of the knife of a reaper is faster than its forward velocity.
b. The velocity of the knife of a reaper is slower than its forward velocity.
c. The velocity of the knife of a reaper is the same with the forward velocity.
d. None of the above
a. The velocity of the knife of a reaper is faster than its forward velocity.
The difference between a stripper and a reaper is that __________________.
a. the stripper cuts the panicle during harvesting
b. the reaper detaches the grain during harvesting
c. the stripper detaches the grains while the reaper cuts the panicle during harvesting
d. None of the above
c. the stripper detaches the grains while the reaper cuts the panicle during harvesting
Heavy-duty type power tiller basically consists of _______ axles?
a. single
b. double
c. triple
d. None of the above
b. double
Twelve man-days is equivalent to:
a. one man working for 12 hrs
b. three men working for three days
c. six men working for 2 hrs
d. four men working for 3 days
d. four men working for 3 days
An engine valve arrangement wherein the intake and exhaust valves are located on one side of the cylinder block.
a. I - head arrangement
b. L- head arrangement
c. X- head arrangement
d. None of the above
b. L- head arrangement
Hydraulic control level of a tractor are usually located at the ____________.
a. right side of the operator seat
b. left side of the operator seat
c. front of the operator seat
d. None of the above
b. left side of the operator seat
Drawbar types:
a. Fixed drawbar
b. Swinging drawbar
c. Link drawbar
d. All of the above
d. All of the above
Acceptable level wheel slip for two-wheel drive tractor on a tilled or soft soil.
a. 7 - 11%
b. 10 - 15%
c. 16 - 20%
d. None of the above
b. 10 - 15%
The power required in driving power harrows, rotary tiller, and other related equipment.
a. Brake horsepower
b. Drawbar horsepower
c. Power takeoff horsepower
d. All of the above
c. Power takeoff horsepower
Instrument for measuring furnace temperature.
a. Glass bulb thermometer
b. Dial type bimetallic thermometer
c. Thermocouple wire thermometer
d. All of the above
c. Thermocouple wire thermometer
Determine the size of the diesel engine to be used for a 4 inches X 4 inches centrifugal pump. Pump discharge is 200gpm. Total head is 24 ft. Pump efficiency is 55%. V-belt efficiency is 95%. And air-cooled diesel engine delivery rating is 70%.
a. 1.6 hp
b. 2.4 hp
b. 3.3 hp
d. 4.7 hp
b. 2.4 hp
Hp = (QH)/3960*Eff
Hp = (200 gpm24 ft)/(39600.55*0.95)
Hp = 2.4 hp
The conventional system of harvesting and threshing of rice in the Philippines is:
a. manual harvesting and threshing
b. Manual harvesting and mechanical threshing
c. mechanical harvesting and threshing
d. combining
b. Manual harvesting and mechanical threshing
Amount of power that the manufacturer specified for an engine.
a. Indicated horsepower
b. Brake horsepower
c. Rated horsepower
d. Belt horsepower
c. Rated horsepower
A device that provides ignition to a gasoline engine.
a. Flywheel
b. Fuel injector
c. Carburetor
d. Spark plug
d. Spark plug
Device that connects and disconnects power input to the power output.
a. Clutch
b. Gear
c. Pulley
d. None of the above
a. Clutch
Compression pressure for small gasoline engine.
a. 40 to 70 psi
b. 75 to 125 psi
c. 150 to 410 psi
d. None of the above
b. 75 to 125 psi
This mixture of 90% gasoline and 10% alcohol is used as a fuel for spark
ignition engine.
a. methyl ester
b. ethyl ester
c. gasohol
d. normal heptane
c. gasohol
This pump uses the energy of a downward-flowing stream of water to lift a portion of the water to a higher level.
a. centrifugal pump
b. waterwheel
c. hydraulic ram
d. water turbine
b. waterwheel
It is a gasoline fuel additive which helps improves the anti-knocking characteristics of fuels but which has been recently discovered to be dangerous to living beings.
a. methanol
b. ethanol
c. tetraethyl lead
d. gasohol
c. tetraethyl lead
A secondary tillage operation which pulverizes, smoothens, and packs the soil during seedbed preparation and also controls weeds.
a. Harrowing
b. Listing
c. Chiselling
d. None of the above
a. Harrowing
The power take-off rpm of a lawn mower and garden ride-on tractors.
a. 1000 rpm
b. 540 rpm
c. 2000 rpm
d. None of the above
c. 2000 rpm
Power machines that cut sheet metals, angle bars, round bars, or square bars by shear action of two moveable blades that are made to move by maximized leverage.
a. Sheet metal circular cutter
b. metal cutting power saw
c. Square shearing cutter
d. Power shears
d. Power shears
Twelve man-days is equivalent to the output of:
a. 3 men X 4 days
b. 6 men X 2 days
c. 12 men X 1 day
d. all of the above
d. all of the above
When heat alone is used to melt and flow metal together, the process is known as _______.
a. Soldering
b. Pressure welding
c. Fusion Welding
d. None of the above
c. Fusion Welding
Component parts of a seeder that is used to calibrate the seed metering device.
a. Furrow wheel
b. Ground wheel
c. Support wheel
d. All of the above
b. Ground wheel
A central part of a plow where the share, moldboard, and landside are attached.
a. Frame
b. Frog
c. Shank
d. None of the above
b. Frog
Engine cooling method.
a. air cooled
b. water cooled
c. air and water cooled
d. All of the above
d. All of the above
Seed produced from breeder seeds and distributed to all members of the Seed Net and selected seed producers in every province for further multiplication.
a. Certified Seeds
b. Registered Seeds
c. Foundation Seeds
d. Breeder Seeds
c. Foundation Seeds
It is the useful service life of the machine before it becomes unprofitable for its original purpose due to obsolescence or wear.
a. Machine economic life
b. Machine life span
c. Machine service life
d. None of the above
a. Machine economic life
Angle in the soil surface plane perpendicular to the direction of travel between the tool axis and the line which is perpendicular to the direction of travel.
a. Tilt angle
b. Side angle
c. Lift angle
d. None of the above
b. Side angle
Seed produced from Foundation Seed and being distributed to all accredited seed producers for mass production.
a. Certified Seeds
b. Registered Seeds
c. Foundation Seeds
d. Breeder Seeds
b. Registered Seeds
Seed produced from the Registered Seed by accredited seed producers and distributed to farmers for commercial production.
a. Certified Seeds
b. Registered Seeds
c. Foundation Seeds
d. Breeder Seeds
a. Certified Seeds
Machine operation in which there are two or more machines performing their own respective operation simultaneously.
a. Individual operation
b. Parallel operation
c. Series operation
d. None of the above
b. Parallel operation
Machine operation in which there are two or more machines performing their own respective operation in sequence.
a. Individual operation
b. Parallel operation
c. Series operation
d. None of the above
c. Series operation
Machine operation in which one or more similar machines are operated as one unit.
a. Individual operation
b. Parallel operation
c. Series operation
d. None of the above
b. Parallel operation
A type of gas producer which has the ability to gasify wet fuel.
a. Updraft
b. Down draft
c. Cross draft
d. Fluidized bed
a. Updraft
The gasification rate of rice hull ranged from
a. 90-105 kg/m2-hr
b. 110-210 kg/m2-hr
c. 210-240 kg/m2-hr
d. None of the above
b. 110-210 kg/m2-hr
Rice hull gasifier efficiency normally ranged from
a. 50-70 %
b. 70-80 %
c. 80-90 %
d. None of the above
a. 50-70 %
The caloric value of fuel is
a. The amount of heat contained by the fuel per unit weight
b. The heat needed to burn a certain weight of fuel
c. The weight of fuel to be heated
d. None of the above
a. The amount of heat contained by the fuel per unit weight
A type of rice husk furnace that burns the fuel while it is being spread in a circular pattern inside the combustion chamber.
a. Step grate furnace
b. Suspended air furnace
c. Cyclone furnace
d. All of the above
c. Cyclone furnace
The thermal efficiency of the furnace is the ratio of
a. The amount of fuel used to the amount of heat generated during combustion
b. The amount of heat generated during combustion to the amount of fuel used
c. The amount of heat delivered to the amount of heat available in the fuel used
d. None of the above
c. The amount of heat delivered to the amount of heat available in the fuel used
The burning temperature of most agricultural waste
a. 100-200°C
b. 300-400°C
c. 500-600°C
d. None of the above
b. 300-400°C
A high-cetane fueled engine uses
a. Diesel as fuel and is difficult to start engine at lower temperature
b. Diesel as fuel and is easy to start at higher temperature
c. Gasoline fuel and is easy to start at lower temperature
d. None of the above
b. Diesel as fuel and is easy to start at higher temperature
High viscosity engine oil is desirable to use because
a. Its viscosity changes easily with a change in temperature
b. Its viscosity does not change easily with the change in temperature
c. Its viscosity changes even without a change in temperature
d. None of the above
a. Its viscosity changes easily with a change in temperature
Engine oil having high flash and fire point indicates.
a. High boiling point
b. High evaporation rate
c. High heating value
d. All of the above
a. High boiling point
In order to increase the resistance of engine oil, the formation of certain acidic product that may cause corrosion of certain type of bearing
the recommended additive to use is.
a. Anticorrosive
b. Antioxidants
c. Dispersants
d. All of the above
b. Antioxidants
An additive purposely to provide a protective film on bearing surfaces thus preventing any acid to corrode metal parts.
a. Anticorrosive
b. Antioxidants
c. Dispersants
d. All of the above
a. Anticorrosive
Additives to cause carbon particles in the engine to remain in suspension in oil.
a. Anticorrosive
b. Antioxidants
c. Dispersants
d. All of the above
c. Dispersants
The burning of portion of fuel in the combustion chamber of an engine at
a rate faster than the desired.
a. Knocking
b. Detonation
c. Misfiring
d. All of the above
b. Detonation
A device used to measure the quantity of oil in a crankcase.
a. Dipstick
b. Oil gauge
c. Oil stick
d. None of the above
a. Dipstick
A device that provides a rich mixture of fuel during high load and lean mixture during under load.
a. Carburetor
b. Economizer
c. Fuel regulator
d. All of the above
b. Economizer
The lubrication system of an engine is basically
a. To reduce wear and tear of an engine
b. To act as complement of the cooling system
c. To act seal between the piston and cylinder wall
d. All of the above
d. All of the above
When a diesel engine knocks, the trouble is
a. The diesel fuel ignition timing is late
b. Incorrect type of spark plug
c. Incorrect engine lubrication and wrong grade oil
d. All of the above
a. The diesel fuel ignition timing is late
When a gasoline engine knocks, the problem is
a. The spark timing is too far advance
b. Incorrect type of spark plug
c. Incorrect type of fuel
d. All of the above
a. The spark timing is too far advance
If the engine timing is advance
a. The spark plug ignites earlier than the fuel while piston is completing the compression stroke
b. The spark plug ignites earlier than the fuel while the piston is at the intake stroke
c. The spark ignites earlier than the fuel while moving downward immediately after the power stroke
d. all of the above
c. The spark ignites earlier than the fuel while moving downward immediately after the power stroke
It is the act of checking, testing, measuring, repairing and adjusting the engine in order to bring it to the peak efficiency.
a. Trouble shooting
b. Tune-up
c. Timing adjustment
d. All of the above
b. Tune-up
The coefficient of traction for wheel-type tractor is highest for
a. Concrete road
b. Fine sand
c. Sandy loam soil
d. All of the above
a. Concrete road
The rapid explosion of mixture of fuel and air within the cylinder when ignited by spark plug is in _____.
a. Constant volume combustion
b. Constant temperature combustion
c. Constant pressure combustion
d. All of the above
c. Constant pressure combustion
The relatively slow burning as the fuel is injected into a highly compressed heated air is.
a. Constant volume combustion
b. Constant temperature combustion
c. Constant pressure combustion
d. All of the above
c. Constant pressure combustion
The gross heating value of diesel is
a. Higher than gasoline
b. Higher than kerosene
c. Higher than ethanol
d. All of the above
c. Higher than ethanol
Which of the following is true in the operating gasifier for internal combustion engine?
a. Only 50 to 70 % of the diesel oil can be replaced by gas producer.
b. Gasoline and diesel can be fueled with gas producer.
c. The power output of gasoline engine at arbitrary rpm will increase by 30 to 50 % when fueled with producer gas.
d. all of the above
d. all of the above
An injection system used in small stationary diesel engine consisting essentially of a high pressure pump and an injection nozzle.
a. Air injection system
b. Solid injection system
c. Automized injection system
d. None of the above
b. Solid injection system
An engine running at a speed of 2000 rpm is classified as
a. Low speed engine
b. Medium speed engine
c. High speed engine
d. None of the above
c. High speed engine
A primary tillage operation which manipulates the soil to a greater depth than 300 mm.
a. Reservoir tillage
b. Deep tillage
c. Ridge tillage
d. None of the above
b. Deep tillage
A secondary-tillage implements which stirs the soil using multiple number of disk blade arranged on a gang.
a. Spike tooth harrow
b. Disk harrow
c. Two of the above
d. None of the above
b. Disk harrow
A trailing harrow that is hitched too high to the drawbar will . . .
a. Have too deep penetration
b. Have right penetration
c. Have too shallow penetration
d. None of the above
d. None of the above
A kind of chemical used for spraying which form finely divided solid particles when mixed with water.
a. Emulsion
b. Suspension
c. Solution
d. All of the above
b. Suspension
Growing of more than one crop on the same land in one year
a. Mixed crop
b. Multiple cropping
c. Inter-cropping
d. None of the above
b. Multiple cropping
Growing of two or more crops simultaneously and intermingled with no row arrangement.
a. Mixed cropping
b. Inter-cropping
c. Multiple cropping
d. None of the above
a. Mixed cropping
Growing of two or more crops in alternate rows.
a. Inter-planting
b. Inter-cropping
c. Inter-culture
d. All of the above
b. Inter-cropping
It is a practice of planting short-term annual crop with long-term annual or biennial crops.
a. Inter-planting
b. Inter-cropping
c. Inter-culture
d. All of the above
a. Inter-planting
It is the cultivation of one crop underneath a perennial crop.
a. Inter-planting
b. Inter-cropping
c. Inter-culture
d. All of the above
c. Inter-culture
Application of chemical to a small restricted area, usually to control the spread of pest.
a. Spot treatment
b. Space application
c. Direct application
d. All of the above
a. Spot treatment
Dispersion of liquid or dry particles in air in such a manner that target pest is exposed to chemical.
a. Spot treatment
b. Space treatment
c. Direct application
d. All of the above
b. Space treatment
Application of chemical to the steam, fruit, leaves, needles, or blades of the plant.
a. Direct application
b. Foliar application
c. Space application
d. All of the above
b. Foliar application
Application of chemical to a specific area such as row, bed, or base of the plant.
a. Direct application
b. Spot treatment
c. Space application
d. None of the above
a. Direct application
