Context: Central station electricity can often be generated with higher efficiency than a mobile engine/generator. While the efficiency of power plant generation and diesel locomotive generation are roughly the same in the nominal regime, diesel motors decrease in efficiency in non-nominal regimes at low power  while if an electric power plant needs to generate less power it will shut down its least efficient generators, thereby increasing efficiency. The electric train can save energy (as compared to diesel) by regenerative braking and by not needing to consume energy by idling as diesel locomotives do when stopped or coasting. However, electric rolling stock may run cooling blowers when stopped or coasting, thus consuming energy.

Question: Which of two can be more efficiently electricified?
Answer: Central station

Question: How can electric power plant become more power efficient?
Answer: it will shut down its least efficient generators

Question: How can electric train be more energy efficient?
Answer: by regenerative braking

Question: Which type of train continues to use energy while coasting or being stopped?
Answer: diesel

Question: What causes electric trains to waste energy?
Answer: cooling blowers

Question: Diesel motors increase in efficiency where?
Answer: Unanswerable

Question: Electric rolling stock may use heating blowers when?
Answer: Unanswerable

Question: What can often be generated with a lower efficiency?
Answer: Unanswerable

Question: If an electric power plant needs to generate more power it shuts down what?
Answer: Unanswerable

Question: The diesel train can save energy by regenerative what?
Answer: Unanswerable