I. Check yourself in your vocabulary.

What do you call:

1. the type of D.C. motor which possesses a field winding connected in series with the armature circuit?

2. the shunt-wound motor characteristic which makes a "rigid", slightly inclined curve?

3. the method of speed regulation which is performed by placing an adjusting rheostat in parallel with the field winding?

4. the type of D.C. motor which has the field winding connected in par­allel with the armature winding?

5. the shunt-wound motor characteristic which makes a straight line?

6. the property which a series motor manifests while running idle or at load that is 20 - 25% less than the rated one?

7. the type of motor which is only started under load?

8. the series motor characteristic which makes a "mild", considerably inclined curve?

9. the type of D.C. motor which has two field windings?

10. the type of compound motor which hasn't found application on board ship?

11. the type of compound motor which features a small starting torque?

12. the type of compound motor which is provided with a predominant series field winding and an auxiliary shunt-field winding?

13. the type of D.C. motor which while running idle doesn't tend to overspeed?

14. the type of compound motor having a predominant shunt field winding and an auxiliary series field winding?

15. the type of compound motor which has the fluxes that add up?

II. Make sure you've properly realized the contents of the texts given above.

1. A shunt-wound motor is the one which has:

1. two field windings;

2. one field winding connected in parallel with the armature winding;

с) one field winding connected in series with the armature winding.

2. Stepless speed regulation within wide limits is accomplished by put­ting:

   1. a regulating rheostat in the armature circuit;

   2. an additional resistor in the armature circuit;

   3. both a regulating rheostat and an additional resistor in the armature circuit.

3. The starting torque of a shunt-wound motor is:

   1. small, directly proportional to the armature current;

   2. large, proportional to the square value of the armature current;

   3. considerable, inversely proportional to the armature current.

4. A series-wound motor is the one which:

   1. doesn't tend to overspeed while running idle;

   2. doesn't tend to overspeed while running at load which is 20 - 25% less than the rated one;

   3. tends to overspeed while running idle or at load which is 20 - 25% less than the rated one.

5. The speed characteristic of a series-wound motor makes:

   1. a slightly inclined curve;

   2. a considerably inclined curve;

   3. a straight line.

6. A series-wound motor is used to drive:

   1. starters, turning gears etc.;

   2. windlasses, capstans, cranes etc.;

   3. pumps, compressors, fans etc.

7. A differential compound motor has the fluxes which:

   1. add up;

   2. are directed in opposition;

   3. remain constant.

8. The shunt motor torque characteristic makes:

   1. a slightly inclined curve;

   2. a considerably inclined curve;

с) a straight line.

2. The properties of series-compound motors are:

   1. absolutely identical to those of series motors;

   2. different from those of series motors;

   3. similar to those of series motors.

3. Cumulative compound motors may be sub classified into:

   1. series-compound motors and differential compound motors;

   2. shunt-compound motors and differential compound motors;

   3. series-compound motors and shunt-compound motors.

4. The shunt motor speed characteristic makes:

   1. a slightly inclined curve;

   2. a considerably inclined curve;

   3. a straight line.

5. The properties of shunt-compound motors are:

   1. similar to those of shunt motors;

   2. absolutely identical to those of shunt motors;

   3. different from those of shunt motors.