LE 2

95問 • 1年前

問題一覧

The unit draft of a 4 bottom, 20 in disc plow is 8.1 psi, when plowing at 4kph. Assuming width of cut is 10 in per disc. What is the drwbar HP requirement of the plow?

43 hp

How many hectare will a 5 disk plow finish in 24 hours if the effective cut is 12 in/disk at a speed of 4 kph and an average of 35% time loss.

9.5 ha

A dynamometer test shows that an engineer delivers an average output of 30 hp at a speed of 1800 rpm. What torque is exerted in ft-lb?

87.5

At a wind velocity of 12 m/s, a 4-meter-diameter windmill for pumping water can approximately generate:

2.2 kW

A 4-stroke cycle, 4 cylinder engine has a cylinder dimension of 12 in x 22 in. The speed of rotation is 150 rpm and the imep is 7.5 kg/cm2. What is the ihp?

201 hp

How long will it take to pump water weighing 52 kg up a 400 m hill if the power required to do the work is 3 kW?

69 sec

Determine the average output at the crankshaft of engine at 3000 rev/min if the torque exerted is 240 ft-lb.

137 hp

Compute for the static weight on the front wheels of a tractor that has a wheel base of 87 in and weight of 7500 lbs. It is also given that the location of the center of gravity with respect to the rear axle is 33 in.

2844 lbs

If a belt produces a tangential force of 425 N on a pulley having radius of 0.6 m at a speed of 155 rev/min, what will be the power?

4.14 kW

What will be the piston displacement of tractor with a 10 in bore and 12 in stroke?

942.5 cubic inches

What will be the total piston displacement per min - per hp of a tractor that has a 4 - cylinder engine with 4 x 5.5 in cylinder and develops 60 hp at 1650 rpm?

3801

Compute the crankshaft rear axle ratio required to travel speed of 18 mph for a tractor having an engine speed of 2200 rpm and rear wheels that are 45 in in diameter.

16.37 %

Determine the number of days it will take to finish plowing a 2-ha field using a 12-cm animal-drawn plow at a speed of 4 kph and efficiency of 75 % if 1 day = 8 hrs of operation.

7 days

A 8-ha field was prepared using a 1.2 m floating power tiller. It took 30 hrs to complete the operation at a speed of 3 kph. Determine the field efficiency.

74 %

Determine the linear speed (kph) of a two-wheel tractor if the specifications of the transmission devices are as given:

9 kph

Calculate the drawbar hp required to pull a plow with 3 x 16 in bottoms at the rate of 3 mph if the specific draft is 7.5 psi and depth of cut is 8 inches.

23 hp

A 1.2 m wide floating tiller is used for rotary tilling/puddling a 30 m x 45 m wetland paddy field. The average speed of travel is 3.1 kph and turning at the headlands takes 12 seconds. What is the field efficiency if the field is worked along its length?

78 %

A certain lift pump has cylinder diameter of 120 mm and pump stroke of 150 mm. Results of calibration test of this pump gave a water discharge of 0.34 kg per sec at 15 pump strokes per minute. Determine its volumetric efficiency. Density of water is 1 gm/cc:

80 %

A four cylinder, four stroke cycle with a 3 in x 4 in cylinders develops 25 hp at 1750 rpm. Assuming a mechanical efficiency of 81 % compute the ihp.

31 hp

Determine the depth of cut of a plow with 4-12 in bottoms with a given rte of puling of 5 mph and draft of 7.7 psi of furrow section. Assume that the dhp required is 30 hp.

6 in

Determine the depth of cut of a plow with 4-12 in bottoms with a given rate of pulling of 5 mph and draft of 7.7 psi of furrow section. Assume that the dhp required is 30 hp.

6 in

Based on PAES 212:2004, the minimum field efficiency for rice reaper is?

65 %

Idenify the classification of rubber roll for rice mill shown below:

off-centered

The rubber roll when tested in accordance to PAES 215 shall have hulling effieciency of at least _________.

80 %

Identify the classification of hammer mill (according to its design) shown below:

fixed type

A classification system that indicates the uniformity of grind in the resultant product and is defined as the sum of the weight fractions retained above each sieve divided by 100

fineness modulus

A cylindrical roll generally with protrusions or flutes, used to gather, compress and advance the crop into the cutter head.

feedroll

Forage chopper which uses a feeding mechanism consisting of four or more feed rolls to partially orient and advance the crop at a consistent rate into the cutting mechanism.

precision-cut forage chopper

Type of forage chopper where the chopped materials are thrown away to the front area of the machine

throw-away type

What is the minimum shelling recovery of a peanut sheller?

93%

Based on PAES 222:2005 Achip is a thin slice of material with thickness of about ________.

4 mm

PAES 222:2005 Type of chipping machine with knives mounted radially with the cutting edges describing a plane perpendicular to the axis of rotation.

flywheel type

It is the angle of the cutting edge of the blade of a chipping machine

blade bevel angle

It is the angle of inclination of the blade with respect to the chipping plate.

rake angle

It is an auxiliary conveyor to assist in feeding the crop to the threshing cylinder in a rice combine.

crop elevator

Which type of rice combine is fitted with full or half tracks instead of pneumatic wheels?

track type

It is also called as "binlid"

brewer's rice

Village model is a type of micromill with input capacity of __________.

100-250 kg/hr

The milled rice sample from the laboratory whitener shall be weighed and separated into components of _________.

head rice

It is part of the decorticator where raw materials are beaten up and crushed.

scraper block

Which of the following has the highest fiber recovery when using a decorticator?

ramie

It is the ratio of the amount between the total weight of the fiber extracted to the total amount of fiber content on a dry basis.

extraction efficiency

What is referred to as "copra"?

dried coconut meat from which oil is extracted

What is the minimum percent crude oil recovery of oil expeller?

60 %

What is the maximum moisture content of copra that shall be used as a test material for oil expeller?

8 %

What classification of a multicrop washer-peeler has an effective capacity of more than 15 kg/hr up to 40 kg/hr

medium-scale

Which of the following is not a rhizome?

cabbage

It is aqueous liquid expressed or extracted from crops cells or tissues.

juice

It is a type of extraction mechanism where the machine extract juice by squeezing or compressing. Crops are placed between two surfaces and subjected to pressure.

piston press type

It refers to the physical and chemical properties of juice extracted.

juice quality

In which type of continuous flow dryer does the grain and drying air move in opposite directions?

counter-flow type

What does the term "moisture gradient" refer to in grain drying?

difference between the max and min grain moisture content

Which of the following does not belong to the group?

recirculating type dryer

Which of the following is considered as head rice?

4/5 of the average length of a whole grain

It is the ratio of the total heat utilized to vaporize moisture in the material, to the amount of heat added to the drying air expressed in percent.

drying efficiency

Which of the following is a conventional energy source?

biomass

How is heat utilization measured?

kilojoules per kilogram of H2O

It is the process of holding the grain between the drying passes allowing moisture content in the center of the grain and that on the surface of the grain to equalize.

grain holding capacity

Milling test of the samples obtained during grain drying test shall be conducted at least _______ hours after the drying test while air-dried samples shall be milled when its moisture content reaches 14 %.

48 hours

What is the targeted final moisture content for rice and corn after drying?

14%

Where should the air velocity in a dryer be measured during the test?

at the heat exchanger

What is the minimum tampering time for grains in a continuous flow dryer before reloading to the dryer for another pass?

4 hours

What is the amount of moisture removed from a material whose moisture content is 18% wet basis with dry matter weight of 200 kg?

97 lbs

Which technique is not used in the primary method of moisture determination?

electrical resistance

Based on PAES 204:2000 Mechanical Rice Thresher, what is the maximum mechanically damaged grain?

Based on PAES 204:2000, the maximum allowable nise level for Mechanical Rice Thresher is ______.

95 db

What is an axial flow thresher designed to do?

allow cut plants to move in a helical manner around the threshing cylinder

Which of the following is not a purpose of a concave grate in a thresher?

to clean the cut plants

How is grain-straw ratio defined?

ratio of weight of grains to total weight of grain and straw

What should be measured using a tachometer during the performance test of thresher?

speed of the threshing cylinder

It is a dehulled palay (husk/hull removed) with the bran layer still intact.

brown rice

What is milled rice?

rice with both hull and bran removed

Which auxiliary device is used to giv milled rice a glossy appearance?

polisher

What distinguishes undermiled rice from well-milled rice?

undermilled rice has more than 40% of grains with lengthwise streaks of the bran layer

What percentage of sample grains in regular milled rice may still have lengthwise streaks of the bran layers?

15% to 40%

Type of corn sheller wherein the ear corn are fed into shelling chamber with the application of external force.

table-fed type

What is the minimum shelling recovery for corn sheller?

97%

What is referred to as shelled corn of either dent or flint varieties?

corn kernels

Milled corn kernels with particle size between 1.2 mm to 1.4 mm.

grit #14

It is the major component of the corn mill used to reduce corn kernels into corn grits.

roller mill

What i the minimum main product for corn mill?

64%

It is an auxiliary device of the corn mill that removes foreign material.

pre-cleaner

Shape of a wing or blade of a propeller, rotor, or turbine or sails as seen in cross section.

air foil

PAES 240:2010 Type of driving mechanism that can obtain any fan/blower speed by controlling the pulley ratio.

belt-drive fan/blower

Which of the following is a classification of an axial-flow fan?

tube-axial fan

Fire resistant surface located at the heating chamber of the biomass furnace,

hearth

Which of the following is not a direct-fired biomass furnace?

dry type

Biomass shreddder that is installed permanently and commonly provided with adjustable anchors to level up the machine during operation.

vertical type

These are fine and powder-like particles parenchymatous cells that are extracted from the coconut husk.

coconut peat

Process of removing and separaing the skin and pulp of coffee cherry.

pulping

Method that uses tuxying knife to thrust one side of the leaf sheath and make a cut between the upper and the inner portions of the material to be able to extract the tuxies.

locnit method

Machine used to mix uniformly the feed ingredients.

feed mixer

What are chaffs in the context of threshing?

empty grains and crushed straw

It is the ratio of the weight of grains that come out of the threshing chamber with the straw, to the weight of total grain input of the thresher, expressed in percent.

separation loss

What is the bran layer in brown rice?

the aleurone cells covering the endosperm

Weekly Test 1

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Weekly Test 1