week 3

Question 1

mechanical device consisting of an engine and power transmission system. The engine ranges from 3 hp to over 100 hp.

Answer 1

Tractor –

Question 2

Tractor engine ranges

Answer 2

3 hp to over 100 hp.

Question 3

• Derived from the Latin word trahere, meaning.

Answer 3

“to draw”

Question 4

• The first two-wheel tractors were introduced in the Philippines from ______in the _____ for wet land rice cultivation.

Answer 4

Japan, 1960s

Question 5

• The first four-wheel tractors were brought to the Philippines during the ______ occupation for large-scale sugar cane production.

Answer 5

American

Question 6

single-axle machine powered by an engine ranging from 3 hp to 15 hp.

Answer 6

Two-wheel Tractors

Question 7

• Used for land preparation, planting, cultivating, harvesting and transport.

Answer 7

Two-wheel Tractors

Question 8

*2 wheel tractors is also known as_____ or hand tractors.

Answer 8

walking type tractors

Question 9

provides pulling power through its drawbar.

Answer 9

Traction type –

Question 10

• Fitted with pneumatic tires for dry land operation.

Answer 10

Traction type –

Question 11

• Fitted with steel cage wheels for wet land operation.

Answer 11

Traction type –

Question 12

• Equipped with single-bottom moldboard plow or two-bottom disc plow and comb-tooth harrow for land preparation and a trailer for transport.

Answer 12

Traction type –

Question 13

fitted with rotary blades to cut and pulverize the soil.

Answer 13

Rotary type –

Question 14

• _______may be attached to a rear axle powered by the tractor PTO for dry land preparation.

Answer 14

Rotary blades

Question 15

fitted with a drawbar for traction work and a power-take-off (PTO) for rotary work.

Answer 15

General-purpose Type

Question 16

• This tractor is made of Japanese design and comes normally with steering clutches and multiple speed transmission including reverse

Answer 16

General-purpose Type

Question 17

double-axle machine powered by an engine ranging from 15 hp to over 100 hp.

Answer 17

Four-wheel Tractor –

Question 18

• Power is delivered as draft at the drawbar, rotary at the PTO and lifting at the hydraulic system.

Answer 18

Four-wheel Tractor

Question 19

• Implements are mounted on the tractor using the hydraulic-controlled three-point hitch system.

Answer 19

Four-wheel Tractor

Question 20

• It is a slow moving vehicle (up to 30 kph) with high torque on the driving wheels

Answer 20

Four-wheel Tractor

Question 21

• It comes with multiple speed transmission including reverse to accommodate various field speeds.

Answer 21

Four-wheel Tractor

Question 22

• The operator is provided with a seat from where the tractor is controlled.

Answer 22

Four-wheel Tractor

Question 23

• 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.

Answer 23

Four-wheel Tractor

Question 24

• Classified as either Compact or Standard Type.

Answer 24

Four-wheel Tractor

Question 25

tractors with power rating below 32 hp.

Answer 25

Compact tractors –

Question 26

32 hp to 49 hp.

Answer 26

Standard light tractors –

Question 27

50 hp to 69 hp.

Answer 27

Standard light-medium tractors –

Question 28

70 hp to 89 hp.

Answer 28

Standard medium tractors –

Question 29

90 hp and above.

Answer 29

Standard heavy tractors –

Question 30

second major component of the tractor.

Answer 30

Transmission System –

Question 31

• It provides draft power through the wheels, rotary power through the PTO and lifting power through the hydraulic system.

Answer 31

Transmission System –

Question 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%.

Answer 32

. Direct Coupling –

Question 33

Common Methods of Power Transmission:
* Speed of rotation of engine = speed of rotation of load.

Answer 33

Direct Coupling –

Question 34

Common Methods of Power Transmission:

Direction of rotation of engine is the same as the load.

Answer 34

Direct Coupling –

Question 35

formula of direct coupling

Answer 35

N2 = N1

Question 36

Common Methods of Power Transmission:
two pulleys are used and connected to each other by a belt.

Answer 36

Belt and Pulleys –

Question 37

Common Methods of Power Transmission:* Transmission efficiency is <100% because of belt slippage.

Answer 37

Belt and Pulleys –

Question 38

Common Methods of Power Transmission:
* Clutch action may be obtained by a third pulley.

Answer 38

Belt and Pulleys –

Question 39

Common Methods of Power Transmission:
* Speed ratio between engine and load depends on diameter ratio of the two pulleys:

Answer 39

Belt and Pulleys –

Question 40

N1D1 = N2D2

Answer 40

Belt and Pulleys –

Question 41

Common Methods of Power Transmission:
The direction of rotation of the engine is the same as the load.

Answer 41

Direct Coupling –

Question 42

– lugged tires are used to increase traction.

Answer 42

Tractor Tires

Question 43

• Ribbed tires are suitable for steering 9front tires).

Answer 43

Tractor Tires

Question 44

• Lugs/tread should be oriented to penetrate the soil.

Answer 44

Tractor Tires

Question 45

provide greater contact area with soil and may permit the use of additional ballast.

Answer 45

Dual Tires –

Question 46

• Improves floatation so the tractor is less likely to sink into soft soils.

Answer 46

Dual Tires –

Question 47

• Increases the stress on tractor axles, bearings, and the entire drive train.

Answer 47

Dual Tires –

Question 48

• Increases the stress on tractor axles, bearings, and the entire drive train.