EXAM I

Question 1

Minimum soil manipulation necessary for crop production or for meeting
tillage requirements under existing soil condition.
a. No-tillage planting
b. Much tillage
c. Minimum tillage
d. None of the above

Question 2

A tool which cuts plants materials and soil ahead of another tool.
a. Coulter
b. Jointer
c. Injector
d. Two of the above

Question 3

The force to propel an implement in the direction of travel.
a. Draft
b. Drawbar horsepower
c. Side draft
d. None of the above

Question 4

The angle, in a vertical plane perpendicular to the direction of travel,
between a centralized tool or reference axis and the soil surface.
a. Tilt angle
b. Lift angle
c. Side angle
d. None of the above

Question 5

It is deep chiselling below 16 in. For the purpose of loosening soil for
root growth and/or water movement.
a. Ridging
b. Chiselling
c. Subsoiling
d. None of the above

Question 6

The ratio of the clearance volume from the total volume.
a. Compression ratio
b. Air fuel ratio
c. Bore stroke ratio
d. None of the above

Question 7

Conversion of solid into combustible carbon monoxide through thermo
chemical reaction.
a. Digestion
b. Carbonization
c. Gasification
d. Pyrolysis

Question 8

Power transmitted to the pistons by the gas in the cylinder
a. Brake horsepower
b. Indicated horsepower
c. Drawbar horsepower
d. Flywheel horsepower

Question 9

Number of explosion of piston on a single cylinder, four stroke cycle
engine in 100 revolution of the crankshaft.
a. 100
b. 50
c. 25
d. None of the above

Question 10

A device that connects and disconnects power input to the power output.
a. Clutch
b. Gear
c. Pulley
d. None of the above

Question 11

The space when the piston is at the top dead center
a. Piston displacement volume
b. Clearance volume
c. Total volume
d. None of the above

Question 12

How many piston strokes are there in one revolution of a crankshaft.
a. One
b. Two
c. Four
d. None of the above

Question 13

A device which connects or disconnects engine crankshaft to the
transmission box or driven machine.
a. Differential gear
b. Clutch
c. Actuator
d. None of the above

Question 14

Firing order for 8-cylinder V piston
a. 1-6-8-4-3-2-7-5
b. 1-8-7-3-6-5-4-2
c. All of the above
d. None of the above

Question 15

Number of times the intake valve opens in a single-cylinder four-stroke
cycle after completing 200 revolutions.
a. 200
b. 100
c. 50
d. None of the above

Question 16

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

Question 17

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

Question 18

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

Question 19

The greatest heat loss for a 4-stroke cycle, spark ignition engine with a
thermal efficiency of 23% is attributed to:
a. cooling system
b. friction
c. exhaust gases
d. radiation

Question 20

This gas is a mixture of butane and propane and may be used to a
considerable extent as engine fuel.
a. biogas
b. LPG
c. producer gas
d. natural gas

Question 21

This refers to the quantity of heat required to raise the temperature 1
lb of water 1ºF.
a. specific heat
b. thermal conductivity
c. heating value
d. Btu

Question 22

It is the partial or complete interruption of the fuel flow in the fuel
system as a result of vaporization of the fuel and the formation of gas
bubbles at some point.
a. stalling
b. vapor lock
c. detonation
d. explosion

Question 23

A soil mass cut, lifted, pulverized, inverted, and thrown to one side of
the plow bottom.
a. Furrow crown
b. Furrow slice
c. Furrow wall
d. None of the above

Question 24

Man as a power unit is very inefficient and ineffective. He is limited
to a continuous power output of:
a. 746 watts
b. 3,300 ft-lb/min
c. 0.1 kilowatt
d. 0.1 hp-hr

Question 25

The maximum percentage of energy that can be obtained from the wind through the use of any mechanical wind energy conversion device is: a. 50% b. 59.3 % c. 25.5% d. 40.7%

Question 26

It is a vertical axis windmill with a very low tip-speed ratio. a. Cretan b. Savonius c. Darrieus d. 2-bladed airfoil type

Question 27

This fuel is obtained from the fermentation of wet wastes such as animal dung in the absence of oxygen. This gaseous fuel contains up to 60 percent methane. a. producer gas b. carbon monoxide c. liquefied petroleum gas d. biogas

Question 28

If a carabao pulls an implement with a draft of 1,000 nt at a speed of 4 kph, what is the approximate power generated? a. 1 hp b. 1.8 kW c. 1.5 hp d. 1.5 kW

Question 29

In the operation of this ideal engine, the combustion of fuel occurs instantaneously such that the pressure rises at constant volume. a. Diesel cycle engine b. Otto cycle engine c. compression ignition engine d. Carnot cycle engine

Question 30

An engine with a clearance volume of 120 cm3 and whose bore and stroke are 10 cm and 10 cm, respectively, is most possibly: a. a gasoline engine b. a diesel engine c. a compression ignition engine d. a jet engine

Question 31

The ideal air-fuel ratio in terms of weight for methane (CH4) is: a. 14.5:1 b. 16.7:1 c. 15.2:1 d. 17.3:1

Question 32

The ideal air-fuel ratio in terms of weight for cetane (C16H34) is: a. 15:1 b. 16:1 c. 14:1 d. 17:1

Question 33

The octane rating of a mixture of 3 liters of normal heptane and 27 liters of isooctane is: a. 50 b. 100 c. 20 d. 90

Question 34

The compression ratio of engines is directly related to its thermal efficiency. Theoretically: a. Otto-cycle engines have higher thermal efficiency than Diesel cycle engines. b. Diesel-cycle engines have higher thermal efficiency than Otto-cycle engines. c. Otto-cycle and Diesel-cycle engines have approximately equal thermal efficiency. d. None of the above.

Question 35

This kind of gasoline can be obtained by breaking up heavy molecules of oil into lighter ones: a. natural gasoline b. cracked gasoline c. straight-run gasoline d. blended gasoline

Question 36

Considering that there are 3M farms, 12M ha of agricultural lands and assuming five farmers per farm, the human power contribution in the farm is about: a. 0.1 hp b. 0.125 hp c. 1.0 hp d. 1.25 hp

Question 37

Natural gas consists large of: a. butane b. pentane c. propane d. none of the above

Question 38

This fuel is obtained by partial combustion of carbonaceous substances, like coal, wood, charcoal, sawdust, or similar materials, in an atmosphere of air and steam. It is a mixture of carbon monoxide, hydrogen, methane, nitrogen and carbon dioxide. a. LPG b. natural gas c. producer gas d. biogas

Question 39

The sequence by which the cylinder delivers the power stroke. a. Ignition b. Firing order c. Flash point d. None of the above

Question 40

Engine that burns fuel outside the cylinder. a. Spark ignition engine b. External combustion engine c. Compression ignition engine d. None of the above

Question 41

At the intake stroke of a diesel engine, what come in? a. Fuel and air b. Fuel c. Air d. None of the above

Question 42

A device that creates ignition of fuel in a diesel engine. a. Spark plug b. Piston c. Carburetor d. None of the above

Question 43

What are the potential benefits from mechanization? a. Increased cropping intensity and production b. increased productivity of labor c. reduction of losses d. aota

Question 45

The lever-operated manual knapsack sprayer method of test is found in: a. PAES 113:2000 b. PAES 112:2000 c. PAES 113:2001 d. PAES 115:2000

Question 46

Which is not a characteristic of a manager? a. Politician b. must balance competing goals c. mediator d. makes decisions difficult

Question 47

It is the ratio of the weight of the shelled kernels collected at the main outlet, to the total weight of the kernel input of the sheller, expressed in percent. a. shelling recovery b. shelling loss c. purity d. shelling efficiency

Question 48

Which of the following statement about a product is not true? a. Ideas and services are examples of products b. There are five levels of a product namely: core, generic, expected, augmented and potential product c. A product is anything offered to a market for attention, acquisition and consumption. d. A good product is enough to warrant high sales in the market.

Question 49

What three most important factors input into the determination of prices? a. Cost, demand, competition b. Target market, promotional expenses, distribution channels c. Market share, competitive moves, substitutes d. Demographics, purchasing habits, shelf position

Question 50

The first step in pricing is: a. determining the prices of competitors b. setting pricing objectives c. determining market’s sensitivity d. evaluating different pricing methods

Question 51

What factors would lead a marketer to adopt a going-rate pricing strategy? a. There are no product differentiation and competitor moves are uncertain. b. The pricing policy is 20% recovery on production cost. c. There is an unusually high demand for the product. d. There are few substitutes for the product.

Question 52

It is the time used in refueling, lubricating, tightening of chain, etc of the machine. a. Maintenance time b. Machine adjustment time c. Repair time d. All of the above

Question 53

Which of the following statement is true? a. Theoretical field capacity is less than effective field capacity. b. Effective field capacity is more than effective field capacity. c. Theoretical field capacity is equal to the effective field capacity. d. None of the above

Question 54

It is a complete list of all physical assets at a specific point in time. This list indicates the value of each item of property and the amount of farm liabilities. a. market list b. farm capital c. farm potential d. farm inventory

Question 55

Obtained from OXOGENS, it is the most common shop material. a. Silicon b. steel c. galvanized iron d. wood

Question 55

For occupational settings, _____________ is (more specifically) a measure of the acceptability of risk. a. potential b. freedom c. clarity d. safety

Question 56

Tools that are used to make holes or change the shape or size of holes are called a. layout tools b. boring tools c. cutting tools d. driving tools

Question 57

Select a farm operation that can only be done with the use of a machine: a. plowing b. spraying c. harvesting d. threshing

Question 58

The use of machinery does not only imply ownership, the following are also considered viable options: a. renting b. custom hire service c. joint ownership d. borrowing

Question 59

Secondary tillage involves pulverizing 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

Question 60

Part of the moldboard plow bottom that receives the furrowslice, lifts, inverts and throws it to one side is called: a. share b. moldboard c. landside d. frog

Question 61

Gear oil is used for a. Engine b. Transmission box c. Hydraulic system d. All of the above

Question 62

Mean effective pressure for turbo-charge engine. a. 300 psi b. 200 psi c. 400 psi d. None of the above

Question 63

Engine valve that allows the entrance of fuel. a. Exhaust valve b. Intake valve c. Check valve d. None of the above

Question 64

Standard throttling adjustment of an engine. a. 1/3 b. ½ c. ¾ d. None of the above

Question 65

Ignition timing for gasoline engine. a. 1-5 deg b. 5-10 deg c. 10-15 deg d. None of the above

Question 65

Mean effective pressure of an engine. a. 120 psi b. 200 psi c. 50 psi d. None of the above

Question 66

Fuel for compression ignition engine. a. Gasoline b. Kerosene c. LPG d. None of the above

Question 67

A term used to describe the resistance of oil to flow. a. Viscosity b. Cetane Number c. Volume weight d. None of the above

Question 68

Ignition timing for diesel engine. a. 5-12 deg b. 17-19 deg c. 20-26 deg d. None of the above

Question 69

A type of engine that completes power stroke in two revolution of the crankshaft. a. Four-stroke cycle engine b. Two-stroke cycle engine c. All of the above d. None of the above

Question 70

An engine that produce more power per unit weight. a. Four-stroke cycle b. Two-stroke cycle c. All of the above d. None of the above

Question 71

An engine which uses oil entirely as lubricant. a. Four-stroke cycle b. Two-stroke cycle c. All of the above d. None of the above

Question 72

An engine basically has a. Larger cylinder diameter than piston diameter b. Equal piston diameter than cylinder diameter c. Larger piston diameter than cylinder diameter d. None of the above

Question 73

A part of an engine which reduces vibration and stores energy. a. Spark plug b. Flywheel c. Piston d. None of the above

Question 74

The brake constant is a. 2 π R/c b. 2 π RN c. 2 π RFn/c d. None of the above

Question 75

The factors that affect the draft of the plow: a. Soil condition b. Hitch to the tractor c. Topography d. All of the above

Question 76

Two pistons running at the same time in the same direction but performing different strokes. a. Running mate b. Firing order c. Valve timing d. None of the above

Question 77

The greatest heat loss for a 4-stroke cycle, spark ignition engine with a thermal efficiency of 23% is attributed to: a. cooling system b. exhaust gases c. friction d. internal convection