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1131 questions found

Module 3. Electrical fundamentals

What is the reflected impedance in the primary of the transformer circuit shown?

Diagram for question: What is the reflected impedance in the primary of the transformer circuit shown?
  • 20 ohms
  • 500 ohms
  • 50 ohms
tijaku asking:

? should be 50 ohms !

Module 3. Electrical fundamentals

Armature reaction in a DC generator causes

  • MNA to move in the opposite direction of rotation.
  • MNA to move in the direction of rotation.
  • GNA to move in the direction of rotation.
tijaku asking:

Another question says MNA rotates opposite armature rotation, which is true then? thx for your help.

Module 15. Gas turbine engine

Operating thrust reversers at low ground speeds can sometimes cause

  • sand or other foreign object ingestion, hot gas re-ingestion.
  • hot gas re-ingestion, compressor stalls.
  • sand or other foreign object ingestion, hot gas re-ingestion, compressor stalls.
Edigno92 asking:

Hi to everybody. Could u tell me why the compressor stalls in this case? thank

Module 2. Physics

For the CGS system, the force is

  • the 'Newton' which produces an acceleration of 1cm/s2 for a mass of gram.
  • the 'dyne' which produces an acceleration of 1cm/s2 for a mass of gram.
  • the 'pd1' which produces an acceleration of 1 cm/s2 for a mass of gram.
obrien99 asking:

I havent seen anything like this in any of the notes I have anyone understand it.?

Module 6. Materials & hardware

In the anodic film inspection and sealing test, if a good seal has been accomplished

  • the dye mark has no importance.
  • the dye mark will not rub off.
  • the dye mark will rub off.
MridulDev asking:

help please. i'm confused.

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