IX. Complete the following sentences using variants (a) or (b).

1.According to the design of running gear loaders may be

1. crawler

2. crawler and air-tyred

2. Front and swing loaders are provided with changeable equipment

1. for handling loose and piece loads

2. for handling heavy materials

3. Loaders have a hydraulic system for raising and lowering

1. the boom

2. the bucket

4. Multi-bucket loaders are available

1. in chain type

2. in chain and rotary types

5. Multi-bucket loaders cannot operate on

1. boggy soil

2. compacted and frozen loose materials

6. The spherical head carries

1. nine buckets of the rotor

2. six buckets of the rotor

X. Translate the sentences paying attention to the Infinitive and the Complex Subject.

1.Belt conveyors are known to be widely used in construction work.

2. It is interesting to note that ordinary rubber belts are used for temperature +50 to – 50 degrees.

3.The operator can use different combinations of the three movements to lift the load in any direction in space.

4. The width of a belt is known to be selected in conformity with the amount of load it has to handle.

5. Rack-and-pinion jacks are considered to have a higher efficiency than screw jacks.

XI. Insert the verbs in the proper form. Translate the sentences.

1. Front and swing loaders … with changeable equipment.

2. Crawler-mounted multi-bucket loaders … for transferring different building materials.

3. The buckets … filled and … the material onto a belt conveyor.

4. The rotor with buckets … around the carrying tube.

5. The receiving conveyor … the material through the hopper onto the cantilever conveyor.

6. Electric motors … from the mains.

7. The buckets … over the circumference of the rotor.

XII. Fill in the prepositions. Translate the sentences.

1. Multi-bucket loaders can scoop the material … the quarry directly … the face.

2. Multi-bucket loaders … a rotary operating member are used … continuous service.

3. Cantilever conveyor can swing … a horizontal plane …72 degrees both ways … the center line.

4. The receiving conveyor is located … the tube.

5. The rotor is made … the form … a spherical head.

6. Loaders can be classified … the character … the working process.

7. Modern types of loaders have a hydraulic system … raising and lowering the buckets.

XIII. Express agreement or disagreement with the following statements.

1. In front loaders the bucket is swung sideways to be dumped.

2. Front and swing loaders are provided with changeable equipment.

3. Modern types of loaders have an electric system.

4. Multi-bucket loaders are available in chain and rotary types.

5. A crawler-mounted multi-bucket chain loader cannot operate on compacted and frozen loose materials.

6. Multi-bucket loaders with a rotary operating member are used for intermittent service.

7. Multi-bucket loaders have fewer but larger buckets.

XIV. Ask questions on the underlined words:

1. Loaders are classified by the purpose, by the running gear, etc.

2. Front and swing loaders are provided with changeable equipment.

3. A crawler-mounted multi-bucket chain loader is employed to transfer sand, gravel, crushed stone, etc.

4. As the rotor revolves the buckets become filled.