week 3 Flashcards
1
Q
mechanical device consisting of an engine and power transmission system. The engine ranges from 3 hp to over 100 hp.
A
Tractor –
2
Q
Tractor engine ranges
A
3 hp to over 100 hp.
3
Q
- Derived from the Latin word trahere, meaning.
A
“to draw”
4
Q
- The first two-wheel tractors were introduced in the Philippines from ______in the _____ for wet land rice cultivation.
A
Japan, 1960s
5
Q
- The first four-wheel tractors were brought to the Philippines during the ______ occupation for large-scale sugar cane production.
A
American
6
Q
single-axle machine powered by an engine ranging from 3 hp to 15 hp.
A
Two-wheel Tractors
7
Q
- Used for land preparation, planting, cultivating, harvesting and transport.
A
Two-wheel Tractors
8
Q
*2 wheel tractors is also known as_____ or hand tractors.
A
walking type tractors
9
Q
provides pulling power through its drawbar.
A
Traction type –
10
Q
- Fitted with pneumatic tires for dry land operation.
A
Traction type –
11
Q
- Fitted with steel cage wheels for wet land operation.
A
Traction type –
12
Q
- Equipped with single-bottom moldboard plow or two-bottom disc plow and comb-tooth harrow for land preparation and a trailer for transport.
A
Traction type –
13
Q
fitted with rotary blades to cut and pulverize the soil.
A
Rotary type –
14
Q
- _______may be attached to a rear axle powered by the tractor PTO for dry land preparation.
A
Rotary blades
15
Q
fitted with a drawbar for traction work and a power-take-off (PTO) for rotary work.
A
General-purpose Type
16
Q
- This tractor is made of Japanese design and comes normally with steering clutches and multiple speed transmission including reverse
A
General-purpose Type
17
Q
double-axle machine powered by an engine ranging from 15 hp to over 100 hp.
A
Four-wheel Tractor –
18
Q
- Power is delivered as draft at the drawbar, rotary at the PTO and lifting at the hydraulic system.
A
Four-wheel Tractor
19
Q
- Implements are mounted on the tractor using the hydraulic-controlled three-point hitch system.
A
Four-wheel Tractor
20
Q
- It is a slow moving vehicle (up to 30 kph) with high torque on the driving wheels
A
Four-wheel Tractor
21
Q
- It comes with multiple speed transmission including reverse to accommodate various field speeds.
A
Four-wheel Tractor
22
Q
- The operator is provided with a seat from where the tractor is controlled.
A
Four-wheel Tractor
23
Q
- The tractor is provided with various controls for its operation: throttle lever, clutch pedal, brake pedals, gear shift lever, steering wheel, hydraulic main control lever (draft and position control), PTO control lever, differential lock pedal and others.
A
Four-wheel Tractor
24
Q
- Classified as either Compact or Standard Type.
A
Four-wheel Tractor
25
tractors with power rating below 32 hp.
Compact tractors –
26
32 hp to 49 hp.
Standard light tractors –
27
50 hp to 69 hp.
Standard light-medium tractors –
28
70 hp to 89 hp.
Standard medium tractors –
29
90 hp and above.
Standard heavy tractors –
30
second major component of the tractor.
Transmission System –
31
* It provides draft power through the wheels, rotary power through the PTO and lifting power through the hydraulic system.
Transmission System –
32
Common Methods of Power Transmission:
the load is directly connected to the engine by some kind of flange device.
* Transmission efficiency is about 100%.
. Direct Coupling –
33
Common Methods of Power Transmission:
* Speed of rotation of engine = speed of rotation of load.
Direct Coupling –
34
Common Methods of Power Transmission:
Direction of rotation of engine is the same as the load.
Direct Coupling –
35
formula of direct coupling
N2 = N1
36
Common Methods of Power Transmission:
two pulleys are used and connected to each other by a belt.
Belt and Pulleys –
37
Common Methods of Power Transmission:* Transmission efficiency is <100% because of belt slippage.
Belt and Pulleys –
38
Common Methods of Power Transmission:
* Clutch action may be obtained by a third pulley.
Belt and Pulleys –
39
Common Methods of Power Transmission:
* Speed ratio between engine and load depends on diameter ratio of the two pulleys:
Belt and Pulleys –
40
N1D1 = N2D2
Belt and Pulleys –
41
Common Methods of Power Transmission:
The direction of rotation of the engine is the same as the load.
Direct Coupling –
42
– lugged tires are used to increase traction.
Tractor Tires
43
* Ribbed tires are suitable for steering 9front tires).
Tractor Tires
44
* Lugs/tread should be oriented to penetrate the soil.
Tractor Tires
45
provide greater contact area with soil and may permit the use of additional ballast.
Dual Tires –
46
* Improves floatation so the tractor is less likely to sink into soft soils.
Dual Tires –
47
* Increases the stress on tractor axles, bearings, and the entire drive train.
Dual Tires –
48
* Increases the stress on tractor axles, bearings, and the entire drive train.
