Power & Machinery

Question 1

Three primary objectives of farm mechanization?

Answer 1

1. To reduce the drudgery of farm work
2. To increase the productivity of farm work
3. To increase the timeliness and quality of farm work

Question 2

Four principles for the efficient operation of internal combustion engines (Beau de Rochas).

Answer 2

1. The combustion chamber should have the smallest possible surface to volume ratio.
2. The expansion process should be as rapid as possible.
3. The compression at the start of expansion should be as high as possible.
4. The expansion stroke should be as long as possible.

Question 3

(Type of tractor) Widely used in the construction industry.

Answer 3

Crawler

Question 4

(Type of tractor) Introduced to combine the benefits of low ground pressures of crawler tractors with the mobility of wheel tractors.

Answer 4

Belted agricultural tractor

Question 5

(Type of tractor) Used for traction work and is also adaptable to many machines used for growing row crops. Have mechanically driven FWA. Front tires have lugs and are of smaller diameter than the rear tires.

Answer 5

Row-crop

Question 6

(Type of Tractor) Similar to row crop but it is primarily used for traction work and does not have a three-pint hitch.

Answer 6

Standard tractor

Question 7

(Type of tractor) Row-crop tractors that have been modified to give extra clearance for working in tall crops

Answer 7

High clearance tractors

Question 8

(Type of tractor) _______ have low profile and are sometimes equipped with special, streamlined fenders for working under trees.

Answer 8

Orchard tractors

Question 9

(Type of tractor) Usually smaller and have less clearance than row-crop tractors. Often used for jobs around the farmstead.

Answer 9

Utility tractor

Question 10

(Type of tractor) Maybe equipped with a mower for mowing lawns, or with a variety of gardening tools.

Answer 10

Garden tractors

Question 11

(Type of tractor) A universal tractor that is specially designed to carry combines, field choppers, and other implements. Its use avoids the duplication of a separate propulsion unit for each of several self-propelled implements.

Answer 11

Implement-carrier tractor

Question 12

(Type of tractor) Similar to farm tractors but are more rugged in order to withstand the continuous duty encountered in road or building construction or similar jobs.

Answer 12

Industrial tractors

Question 13

(Type of tractor) Compact tractors built for the special purpose of moving earth and other materials.

Answer 13

Skid-steer loaders

Question 14

(Type of tractor) Largest tractor used in agriculture. It usually has equal-sized wheels at the front and rear.

Answer 14

Four-wheel-drive tractor

Question 15

(Type of tractor) Similar to the articulated 4WD tractor, except that each of the drive wheels has been replaced by a rubber track which offers advantages similar to those of the belted agricultural tractor.

Answer 15

Quad-track tractor

Question 16

Can now control the height of the three-point hitch and assist in shifting the transmission. Will provide better monitoring and control of tractor operations.

Answer 16

Microprocessors

Question 16

Developed to allow the various microprocessors on a tractor and implement to intercommunicate.

Answer 16

Controlled Area Network (CAN)

Question 17

Aided the development of tractors when passed in 1919 and subsequently helped to eliminate tractors of inferior design.

Answer 17

Nebraska Tractor Test Law

Question 18

The volume of gas in the cylinder when the piston is at head dead center (HDC)

Answer 18

Clearance Volume

Question 19

The volume of gas in the cylinder when the piston is at crank dead center (CDC)

Answer 19

Maximum Volume

Question 20

Ratio of the maximum volume to clearance volume

Answer 20

Compression ratio

Question 21

Volume swept out of the piston as it moves from CDC to HDC

Answer 21

Displacement

Question 22

Theoretical cycle for spark-ignition engine

Answer 22

Otto Cycle