Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

10 Questions

3 Views

Types of Marine Speed Logs

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What principle does the Pressure Tube Log operate on?

Pitotmeter Principle (correct)

Electro Magnetic Induction Principle

Doppler Effect Principle

Hydrodynamic Pressure Principle

What happens to the pressure in the tube if it is held stationary?

Fluctuates (dynamic pressure)

Increases (static pressure)

Remains constant (static pressure) (correct)

Decreases (dynamic pressure)

What does Pitot's Law relate dynamic pressure (p) to?

The ship's length

The square of the ship's speed (v) (correct)

The ship's width

The ship's weight

How is static pressure's effect eliminated in order to get accurate dynamic pressure readings?

By installing a second tube (static pressure intake tube) Signup and view all the answers

Where is the static tube located in the practical installation of the speed log?

Opening in the ship hull Signup and view all the answers

How are both static and dynamic pressures transferred to the speed indicator on the ship's bridge?

Via air controller and strainer valves Signup and view all the answers

In a Pitot system installation on a vessel, what is the purpose of the seacock arrangement and valve control?

To prevent water intake Signup and view all the answers

What is a limitation of the EM Log system?

It has a zero error that needs correction Signup and view all the answers

How does the EM Log determine the vessel's speed?

By creating an electromagnetic field and measuring the induced voltage Signup and view all the answers

How is speed indication affected in Pitot's Law as the ship's speed increases?

It increases non-linearly, following the square of the speed Signup and view all the answers