In a diesel-electric plant, raising the...

Question 1 / 270705eccefa4bacbc34ba4d485cb

Question 1 of 270705eccefa4bacbc34ba4d485cb

In a diesel-electric plant, raising the generator's field excitation current will have what effect on the DC propulsion motor speed?

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Question 1 of 27070

In a diesel-electric plant, raising the generator's field excitation current will have what effect on the DC propulsion motor speed?

🔍 Key Concepts

• Relationship between generator voltage and DC motor speed • Effect of field excitation current on generator output in a diesel-electric plant • How DC motor speed relates to applied voltage and load

💭 Think About

• If you raise the generator field excitation, what happens to the generator’s output voltage, assuming speed and load are roughly constant? • For a DC propulsion motor supplied by that generator, how does a change in supply voltage normally affect its speed when the mechanical load is unchanged? • Which choice best matches the direct electrical effect of increasing excitation, without needing to change the prime mover (diesel) speed?

✅ Before You Answer

• Verify how field excitation affects generator terminal voltage at constant speed • Recall the basic relationship: DC motor speed is approximately proportional to applied voltage for a given load and field strength • Eliminate any options that require changing engine RPM if the question only mentions changing excitation current

Question 1 of 27070

In a diesel-electric plant, raising the generator's field excitation current will have what effect on the DC propulsion motor speed?

increase in speed

effect generator speed only

effect main motor speed if done in conjunction with higher generator engine speeds

decrease in speed

Question 1 / 270705eccefa4bacbc34ba4d485cb

Question 1 of 270705eccefa4bacbc34ba4d485cb

In a diesel-electric plant, raising the generator's field excitation current will have what effect on the DC propulsion motor speed?

Back

Question 1 of 27070

In a diesel-electric plant, raising the generator's field excitation current will have what effect on the DC propulsion motor speed?