EFL Tech - France a Site for Teachers of English ( as a Foreign Language) for  Engineering

On the contrary, with  labelling, . the focus moves  from text to diagram  and it can be used to develop written comprehension.
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(As you will see, my diagrams are hand-made and not very good quality! I do apologize, but have been unable to do better.. If some colleague decides to use this  worksheet and feels it useful or necessary  to  draw his own better diagrams,  I would be grateful to him or her if I was sent the new ones .  Many thanks.)
 
 

TASK 1

1 Read this text

'Motion Master' Ride Management System

1 Comfort plays a critical role in the trucking industry, helping maintain driver concentration over long periods of road time. A new seat suspension -one that combines a motion sensor, electronic controller, and a patented magnetic fluid damper-contributes to a more comfortable ride.

2 As road vibrations enter the vehicle cabin , the motion sensor built into the driver's seat monitors seat movement. Thus the controller electronically updates information on seat position as much as 500 times/sec to determine the force necessary to control seat motion.

3 The damping system uses the inherent properties of magneto-rheological (MR) fluids - suspensions of micron-sized, magnetizable particles in an oil. Normally, MR fluids are free-flowing, like motor oil. When subjected to a magnetic field, however, the randomly dispersed particles form chains that restrict flow, effectively changing viscosity so that they can become almost solid.

4 The controler delivers the magnetic force required to control seat movement so that the system can vary softness or firmness to match changing levels of shocks and vibrations.

a/Road input - b/ Acceptable motion transmitted – c/ Random pattern ( fluidity) – d/ Ordered pattern (viscosity) – e/ Sensor – f/ Controller
 

TASK 2

Label the diagram with the help of the following  text :
 
 

The SC series of SERVO COMPATIBLE direct thrust ( = propulsion) drives from Linear Drives Ltd provides a simple, cost-effective solution to most automation requirements. Proven (= proved) throughout industry, an SC drive is used in place of traditional servo motors and transfer mechanisms, providing thrust directly to the load to be moved

The drives work as follows : the stator of the motor (known as the "thrust rod", comprises a tube housing a special sequence of magnetic components. The thrust rod can be envisaged as a means of creating a series of permanent radial magnetic fields along the whole length of travel (see figure 2). The current carrying conductor necessary to impart thrust is a cylindrical coil through which the thrust rod passes. This coil is housed inside a cylindrical sleeve. Linear thrust can be obtained anywhere along the thrust rod. A linear incremental encoder, placed along the length of travel of the thrust block, is used to obtain information on its position, velocity and direction.

Figure 2.

TASK 3

1 Read this text :

Compression Refrigeration Cycle

A simple vapour-compression cycle is shown in Figure 3.

The refrigerant enters the compressor as a slightly superheated vapour at low pressure. Then it passes to the condenser as a vapour at high pressure. There, as a result of increased pressure and loss of heat ( heat transfer to the exterior surrounding) the refrigerant condenses and leaves the condenser as a high-pressure liquid which passes through an expansion valve to decrease pressure. The liquid, now at low pressure, is vaporized in the evaporator, usually a coiled pipe in the freezer compartment, thus leading to a drop in temperature in this compartment. Finally the refrigerant is drawn away by the compressor and the whole cycle begins again.

2 Label the diagram.

• in a,b,c, et d, show the state of the coolant (liquid or gas) as well as its pressure (high or low):;
• in 1, 2 et 3, show the name of the components;.
• put an arrow to show the direction in which the coolant flows.

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