Power Engineering 3A2 ch7 Test Questions Fully Solved.

Power Engineering 3A2 ch7 Test
Questions Fully Solved.
C - Answer The separately excited DC generator has a _____ load characteristic:

Select one:

A. Rising.

B. Level.

C. Falling.

D. Series.

E. Parallel.



B - Answer The assembled armature core of a DC machine:

Select one:

A. Is wrapped with field windings.

B. Has axial slots around its periphery.

C. Contacts the brushes.

D. Is hard-drawn copper bars.

E. Is connected with the rotor.



C - Answer Neutral axis refers to a position of the:

Select one:

A. Stator causing maximum sparking.

B. Stator causing minimum sparking.

C. Brushes causing minimum sparking.

D. Brushes causing maximum sparking.

E. Rotor causing minimum sparking.



D - Answer Interpoles carry _____ current.

Select one:

A. Field.

B. Load.

C. Flux.

D. Armature.

E. Stator.

, D - Answer In a DC machine, interpoles carry _____ current.

Select one:

A. Field.

B. Load.

C. Flux.

D. Armature.

E. Stator.



C - Answer The practical unit used to represent resistance is:

Select one:

A. Impedance.

B. Amp.

C. Ohm.

D. Farad.

E. Henry.



E - Answer The three-point starter for DC motors has connections for:

1. Line.

2. Positive.

3. Negative.

4. Field.

5. Armature.

Select one:

A. 1, 2, 3, 4

B. 2, 3, 4, 5

C. 1, 3, 4, 5

D. 1, 2, 3

E. 1, 4, 5



D - Answer Question text

Armature reaction _____ the main field of a generator.

Select one:

A. Increases.

B. Decreases.

C. Reverses.