V. Which of the alternatives has the following meaning:

1. A substance that can hold materials together

a) core b) adhesive c) pallet

2. Residues which are formed as a result of sawing

a) slabs b) shavings c) sawdust

3. Residues which are formed as a result of planing

a) edgings b) shavings c) chips

4. The central layer of a particleboard

a) plane b) core c) surface layer

5. The press for making particleboards with heat and under pressure

a) pre-press b) hot press c) cold press

6. A substance which is added into the mixture of wood particles to reduce swelling

of particleboards

a) adhesive b) hydrophobic additives c) chips

7. Pressing of mats before putting them into a hot press, which is needed to keep

the form of the mat

a) extrusive pressing b) pre-pressing c) hot pressing

8. A device for separating coarse fractions from fine (small) ones

a) pallet b) chipper c) vibrating screen

VI. Match the phrases in a, b and c to make up sentences.

A B C

1. Wood particles 1. is a very important 1. on pallets and loaded into

2. The adhesive stage the press

3. From the blender 2. wood particles are fed 2. is moved onto a belt

conveyor

4. Pre-pressing 3. are mixed with 3. smaller wood particles

5. When the pressing an adhesive 4. in a blender

is over 4. consists of 5. is discharged from the

press and cooled

6. The drying operation 5. must not

7. The faces of the board 6. makes the mat 6. in the manufacturing of

8. Wax is usually 7. the resultant mixture composite products

9. From the chipper 8. the mats are placed 7. a hydrophobic additive

10. By the batch pressing 9. the particleboard 8. change the colour of

10. used as wood

9. to a hammer mill

10. denser and helps to keep

its form

VII. Say whether the following sentences are true or false. Correct the wrong

sentences.

1. The sizes of wood particles in the core and in the face layers of particleboard are

the same.

2. In flat-pressed board, the wood particles are arranged in the plane, which is

parallel with the plane of the board.

3. Pressure is required only in producing boards from straws.

4. The wood particles are usually dried in a blender.

5. By the progressive pressing the mats are periodically charged and discharged

from the press.

6. The mats are hot-pressed after pre-pressing.

7. The binding agent for gluing wood particles together is called a hydrophobic

additive.

8. The vibrating screen is used for mixing wood particles with an adhesive.

9. The quality of particleboards is not influenced by the size of wood particles.

10. When forming the mats, even distribution of wood particles is of great

importance.