1. Write a list of all fasteners that you know. Compare it with the one of your groupmate.

2. Give the definition to the following terms and make sentences of your own with each of them:

Rod –

Fastener –

Jointer –

Subsidiary –

Delivery –

Cold forming –

Washer –

Raw material –

Rust –

Thread –

3. Imagine that you are a young crazy inventor and someone presented you a large sum of money. In what field of science would you invest them or what would you do?

Task 10. Fill in the gaps using words or word combinations from the box. Use each word only once.

rectangular, belt, central shaft, device, rotary, simple, pulley, pulley wheel, larger pulley, rope, connected, center, diagram, attached

Pulley systems are used when there is a need to transmit 1) _______ motion. The diagram below shows a 2)________ system comprised of two pulley wheels and a 3)________. It is a simple mechanical 4)________ to winch up and down a rope. When the motor is turned on it revolves the driver 5)_______. The belt causes the driven pulley wheel to rotate as well, winding out the 6)_______. The small pulley is known as the DRIVER, because it is 7)_______ to the motor which provides all the power / drive to the entire pulley system. The 8)_______ (DRIVEN pulley) is 'driven' round by the driver pulley wheel. It rotates because of the power provided by the driver pulley wheel.

M ost pulley wheels have a 9)_______ on which they rotate. To keep the wheel firmly 10)_______ to the shaft it is usual to use what is called a ‘key’. The 11)_______ to the right shows a keyed shaft which is pushed through the 12)_______ of the pulley wheel. A small 13)_______ key is then ‘tapped’ into position, holding the shaft and the pulley wheel together. This fitting means that the 14)_______ wheel cannot slip on the shaft.

Task 11. Translate the following sentences into English:

1. Заклепка має вигляд стрижня круглого поперечного перерізу з голівками по кінцях.

2. Невстановлена заклепка має 2 голівки: одна називається заставною, а друга, яка утворюється в процесі заклепування, називається замикаючою.

3. У багатьох сучасних автомобілях ремені роблять з резино металевого матеріалу, який має обмежений термін експлуатації.

4. Система з двох або більше шківів, які охоплені замкненим привідним пасом, називається пасовою передачею.

5. Деякі ремені полагодити неможливо, слід замінити на новий.

6. Гумові V-подібні ремені використовуються виробниками замість металевого ланцюга, так як вони набагато дешевше і не такі гучні, як ланцюги.

Task 9. Match the terms (1-6) with their definitions (a-f).

1.	self-pierce riveting (SPR)	a)	These rivets are one of the oldest and most reliable types of fasteners. They consist simply of a shaft and head which are deformed with a hammer or rivet gun.
2.	blind rivets	b)	This is a form of blind rivet that has a short mandrel protruding from the head that is driven in with a hammer to flare out the end inserted in the hole.
3.	solid rivet	c)	It is used primarily on external metal surfaces where good appearance and the elimination of unnecessary aerodynamic drag are important. They are used extensively on the exterior of aircraft for aerodynamic reasons.
4.	flush rivet	d)	It is similar to solid rivets, except it has a partial hole (opposite the head) at the tip. The purpose of this hole is to reduce the amount of force needed for application by rolling the tubular portion outward.
5.	drive rivet	e)	This is a process of joining two or more materials using an engineered rivet. Unlike solid, blind and semi-tubular rivets, these rivets do not require a drilled or punched hole.
6.	semi-tubular rivet	f)	These rivets, also known as pop rivets, are tubular and are supplied with a mandrel through the center. This expands the blind end of the rivet and then the mandrel snaps off.

Task 12. Write two paragraphs, one about the advantages and the other about the disadvantages of such mechanical elements as rivets and belts in engineering. Describe their functions and applications. Write your report using 120-150 words.

Task 13. Solve the crossword.

				1 P
	2 D		3 R	O	U	N	D
	I			W
4 F	A	S	T	E	N	E	R
	G			R
	R						5 B
6 W	A	S	H	E	7 R		U
	M				I		C
					V		K
				8 B	E	L	T
					T		A
							I
				9 P	U	L	L	E	Y

Across: 3 Metal or rubber ring with the hole in the center 4 To attach firmly or securely in place 6 A flat ring of metal, rubber or leather 8 A loop of flexible material used to link two or more rotating shafts mechanically 9 Wheel or an axle to support movement of a cablealong its circumference

Down: 1 Energy, force or momentum 2 Drawing or plan that outlines and explains the parts or operations 5 The end opposite the head of a pin 7 Mechanical fastener