問題一覧
1
An internal combustion engine that produces power in one revolution of the crankshaft.
Two stroke cycle engine
2
The direction of a crawler-type tractor can be maneuvered by __________
stopping one of its wheels
3
Acceptable level wheel slip for four-wheel drive tractor on a tilled or soft soil.
8 - 13%
4
Which of the following agencies does not belong to the Department of Agriculture?
AMMDA
5
Width of cut of the disc plow is influenced by:
all of the above
6
Among the factors affecting the choice of harvesting and threshing system, which one is the major factor?
timeliness of operation
7
The power unit for driving centrifugal pumps for household use is usually:
Electric motor
8
At the downward stroke of two-stroke cycle, which of the events are taking place.
None of the above
9
Which of the following is not a part of a typical lever-operated knapsack sprayer?
pressure gage
10
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:
42 – 45 degrees
11
It is a single or pair of wheels with radially mounted tilling blades attached to a common shaft or axle of a puddling-type floating tiller.
Tilling wheel
12
The power that is required in driving a pump shaft.
Brake horsepower
13
The power available at the engine shaft used in driving machinery.
Brake horsepower
14
This scientific phenomenon is the basic principle of operation of spark ignition systems of engines. It says that a change in the magnetic flux in a conducting circuit produces current in the circuit.
electromagnetic induction
15
Distance of movement piston from the top dead to the bottom dead center.
Stroke
16
During the power stroke, which of the following valve is open?
None of the above
17
Type of 2-wheel tractor equipped with a single-bottom moldboard plow and comb-tooth harrow.
traction type
18
In the equation for horsepower, Hp=Q×H/3960×Eff,H is total head in
ft
19
Ferrous metals are metals that contain __________.
Iron
20
Which of the following do belong to crop maintenance equipment?
Plow and harrow
21
It is a set of concave discs.
Gang
22
A hand operated tractor which is suitable for both primary and secondary tillage used when field has been soaked for at least half a day to soften the soil.
Puddling-type floating tiller
23
The threshing action where grains are detached from their panicles when the straw is pulled through a “V” shaped configuration is called:
stripping action
24
A farm is planed be planted with corn at a spacing of 30 cm x 60 cm. As engineer in-charge of the mechanization program of the farm which of the following equipment would you recommend?
Row Crop Planter
25
According to NIA ,water requirement for rice production is
10 mm/day
26
Secondary tillage involves pulverizing the soil to a depth of:
3 to 6 inches
27
One horsepower can generate heat energy equal to
2545 BTU/hr
28
One (1)PS is equal to _________ watts
735.49
29
This is the most common cause of short life of lead acid battery. It results when a cell or battery is permitted to remain in a discharged condition for some length of time such that the lead sulfate hardens and cannot be readily converted to its former state.
sulfation
30
A fuel commonly used for external combustion engine.
Biomass
31
A device that provides ignition to a gasoline engine.
Spark plug
32
This fuel is made by partial combustion of carbonaceous substances like coal, wood, charcoal, sawdust and other similar materials in an atmosphere of air and steam. It is a mixture of carbon monoxide, hydrogen, methane, nitrogen and carbon dioxide.
producer gas
33
At the downward stroke of a two-stroke cycle gasoline engine, which of the following events takes place?
Power, Exhaust, and Intake
34
Another term for puddling-type floating tiller
Float-assist tiller
35
To minimize channel formation inside the gasifier reactor, the superficial gas velocity on the bed of the char should not exceed.
8-9 cm/sec
36
The rear wheel for two-wheel and four wheel drive tractors are adjusted by _____.
inverting the wheel disc
37
A device that meters the fuel air and mixes them into harmonious mixture before the mixture enters the combustion chamber of an engine.
Carburetor
38
Number of spark plugs for 6 cylinder diesel engine
none of the above
39
Part of engine that which slides up and down the cylinder and transmits power to the crankshaft.
Piston
40
Fuel used for constant volume cycle internal combustion engine.
Gasoline
41
Variables affecting the drawbar horsepower:
Implement pulling force and speed
42
pk is Dutch acronym for ____________ .
Paardekracht
43
Engine piston displacement will increase if the ____________.
All of the above
44
Type of engine commonly used for brush cutters.
2-stroke-spark-ignition
45
Primary tillage involves cutting the soil to a depth of:
6 to 36 inches
46
Twelve man-days is equivalent to:
four men working for three days
47
cv is a French acronym for ____________ .
Cheval-vapeur
48
The traditional system of harvesting and threshing of rice is
manual harvesting and threshing
49
A device which uses fluid power to produce mechanical force and motion.
Actuator
50
A device that permits the flow of fuel and of burned gases in one direction only.
Check valve
51
A crawler-type tractor of the same weight provides __________ soil compacting pressure than wheel type tractor.
lower
52
Types of brake system for agricultural tractors:
All of the above
53
Instrument for measuring the speed of a shaft
Tachometer
54
In a water pumping system, the source of water is usually at as
lower elevation than pt. of delivery
55
What type of fastener is used to fasten a metal part to wood?
Carriage bolt
56
PAES recommended diameter of hole in the drawbar for four-wheel agricultural tractor.
33 mm
57
A type of disk harrow that is not directly parallel in position with the tractor during operation.
Offset disk harrow
58
Part of the moldboard plow bottom that receives the furrowslice, lifts, inverts and throws it to one side is called:
moldboard
59
The power that is required in pulling an implement.
Drawbar horsepower
60
Acceptable level wheel slip for two-wheel drive tractor on a firm soil.
7 - 11%
61
Bend sideward of the point of the share to make the plow cut the proper width is:
horizontal suction
62
A device that is used to actuate the throttle of an engine to increase its speed.
Accelerator
63
Part of a planter that is always present in all planters regardless of type and cropping system:
metering device
64
One pferde starke (ps) is equal to
All of the above
65
A type of engine that completes power stroke in one revolution of the crankshaft.
Two-stroke cycle
66
The volume displaced by a piston in making upward and downward stroke.
Piston displacement volume
67
Number of pistons for 6 cylinder four stroke gasoline engine.
6
68
. PS is a German acronym for ________________
Pferdestarke
69
The maximum horizontal projection of a tool in the soil perpendicular to the line of motion.
tool width
70
Draft of disc harrows increases and penetration __________ with speed
decreases
71
Reduction of engine speed or flow of fuel
Throttling
72
An internal combustion engine that produces two power stroke in two revolution of the crankshaft.
Two-stroke cycle engine
73
The threshing action most commonly employed by a mechanical thresher for rice is:
impact action
74
Usable power delivered by the engine
Brake horsepower
75
Common designs of floatation structure for puddling-type floating tiller.
All of the above
76
Engines are not normally used for:
1-ton rice mills
77
Amount of power that the manufacturer specified for an engine.
Rated horsepower
78
The air requirement for gasification of agricultural waste ranged from
30-40 % of SA
79
The speed of the engine is automatically regulated by ______
Governor
80
Instrument for measuring low-pressure head.
Manometer
81
Front tread of four-wheel agricultural tractor is usually adjusted by ______.
changing bolt position of the front axle
82
Which of the following engine requires frequent maintenance?
Spark-ignition engine