I. Make sure you've properly understood the texts dealing with troubleshooting of electrical equipment.

1. Troubleshooting is the procedure of

   1. finding a fault;

   2. eliminating a fault;

   3. both finding and eliminating a fault.

2. Heat and moisture cause:

   1. rated current flow;

   2. abnormal current flow;

   3. minimum current flow.

3. When measuring voltage the electrician must connect the voltmeter:

   1. in parallel with the circuit;

   2. in antiparallel with the circuit;

   3. in series with the circuit.

4. When measuring current the electrician must connect the ammeter:

a) in parallel with the circuit;

2. in antiparallel with the circuit:

3. in series with the circuit.

   5. Before applying an ohmmeter the electrician must:

      1. turn on the power;

      2. turn off the power;

      3. turn down the power.

   6. If the fuse is open, you should:

      1. rewind it;

      2. repair it;

      3. replace it

   7. If a D.C. motor fails to run, one of the reasons is:

      1. shorted armature circuit;

      2. open armature circuit

      3. incorrectly connected armature circuit.

   8. If you've found out that the shunt field winding has been incorre ly connected, you should connect it in accordance with:

      1. a factory mark;

      2. a factory wiring diagram

      3. factory instructions.

   9. If you've found out that the parallel field winding has been parti ly shunted, you should:

      1. connect it to other windings;

      2. connect it to the frame;

      3. disconnect it from both other windings and the frame.

   10. If you observe a differential connection of the shunt and the serie windings in a compound motor, you should connect them:

       1. in opposition;

       2. in antiparallel;

       3. accordantly.

   11. If the motor ventilation channels are clogged, you should:

       1. blow them trough;

       2. remove dirt from them;

       3. clean them.

   12. If the commutator bars are either high or low, you should:

       1. re-arrange the commutator;

       2. grind the commutator;

       3. set the brushes on neutral.

   13. If a three-phase motor fails to start, one of the reasons may be:

       1. rotor one-sidedly attracted to the stator;

       2. rotor one-sidedly repelled from the stator;

       3. rotor one-sidedly fastened to the stator.

   14. If you observe large resistance on the phase rotor circuit, the reason may be:

       1. a defective circuit-breaker;

       2. a faulty rheostat;

       3. a worn bearing.

   15. If the temperature of cooling water in an air cooler increases, you should:

       1. blow trough ventilation channels;

       2. remove dirt from air filters;

       3. clean the air cooler.

   16. If a three-phase motor nominally loaded runs slowly, one of the causes is incorrect voltage at the terminals of the stator winding. It is:

       1. rated;

Н.Л.ТРУХАНОВА, Н.А.КРАВЧЕНКО 2

АНГЛИЙСКИЙ ЯЗЫК 2

TROUKHANOVA N.L., KRAVCHENKO N.A. 2

ENGLISH 2

OF MARINE ELECTRICAL AND POWER ENGINEERING 2

FOR SEAMEN 2

- 51

2. TROUBLESHOOTING OF D.C. MOTORS 74

2. tighten a bearing seal ring;

3. loosen a bearing seal ring;

4. replace a bearing seal ring.