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EM10-Diagnose and Correct Equipment Malfunctions

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About this collection

Videotel questions are grouped by professional topic, including machinery, electrical equipment, fuel and ballast operations. Choose a subject relevant to your preparation.

“Видеотел — Engine Category — EM10-Diagnose and Correct Equipment Malfunctions” contains 20 questions across 1 collection.

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Sample questions and answers

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The weakening of boiler steel as the result of inner crystalline cracking is known as ....The source image is unavailable.

One correct answer

  • 1) exposure stress.
  • 2) caustic embrittlement.✓ Correct answer
  • 3) alkaline stress.
  • 4) corrosion.
What is the primary cause of scavenge air space fires ?The source image is unavailable.

One correct answer

  • 1) Blow-by due to broken piston rings.✓ Correct answer
  • 2) Insufficient cylinder lubrication.
  • 3) Faulty injectors.
  • 4) Excessive cylinder lubrication.
You will notice in this drawing that steam traps are fitted so only condensate can return. Then why is there an atmospheric condenser fitted ?Question illustration

One correct answer

  • 1) Because the water is condensed under pressure and will re- evaporate.✓ Correct answer
  • 2) To allow the vapour and water to be cooled under vacuum.
  • 3) To de-airate the water under vacuum.
  • 4) To avoid steaming up if steam traps are frequently stuck or defective.
The use of a steam trap has a beneficial influence on the thermal balance of the heat exchanger fitted before that trap. This is because .....Question illustration

One correct answer

  • 1) it will allow the steam to expand to atmospheric pressure.
  • 2) all heat is used under corresponding saturated pressure.
  • 3) all heat will be extracted from the steam before turning to water.✓ Correct answer
  • 4) it will allow the steam to expand below atmosphere to vacuum.
What are the steps to be taken, in what order, to stabilise the governor of a diesel engine after overhaul ?The source image is unavailable.

One correct answer

  • 1) Adjust speed P, then integrate, next differentiating, from 0.✓ Correct answer
  • 2) Set integrating to MAX. than adjust speed P and differential D.
  • 3) Set integrating to MAX, differentiating to MIN, adjust speed upward.
  • 4) Integrating and differentiating MAX, set speed from 0 upwards.

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