EM3-Operate, Monitor and Evaluate Engine Performance

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 — EM3-Operate, Monitor and Evaluate Engine Performance” contains 52 questions across 1 collection.

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Sample questions and answers

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A vessel has a propeller with 3828 mm pitch and makes 109 RPM. If the sea speed is 12.8 knots, what is the slip ?

One correct answer

• 1) 8.3 %
• 2) 3.8 %
• 3) 5.3 %✓ Correct answer
• 4) 3.5 %

This is an actual lay-out drawing of a pneumatic amplifier block. Where is the 20 psi supply air admitted ?

One correct answer

• 1) At air passage item 12
• 2) At air passage item 13✓ Correct answer
• 3) At air passage item 14
• 4) At air passage item 15

On which part of the Pneumatic Amplifier is the nozzle back pressure of the nozzle/flapper (NBP) acting ?

One correct answer

• 1) On spring S
• 2) On ball valve B
• 3) On valve V
• 4) On membrane M✓ Correct answer

What is the amplification factor (K) of a pneumatic amplifier ?

One correct answer

• 1) K = 4
• 2) K = 12
• 3) K = 16✓ Correct answer
• 4) K = 20

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