USCG General Engineering 2

Question 1

What is the primary purpose of a diesel engine's intercooler?

Accepted Answer

To cool compressed intake air before it enters the cylinder

Answer

An intercooler cools compressed air from the turbocharger before it enters the cylinder, increasing air density and allowing more fuel to burn efficiently.

Question 2

On a marine vessel, what type of pump is most commonly used for bilge pumping operations?

Accepted Answer

Centrifugal pump

Answer

Centrifugal pumps are most commonly used for bilge service due to their ability to handle large volumes of water and their self-priming capability when fitted with a foot valve.

Question 3

What is the function of a sea chest in a ship's cooling water system?

Accepted Answer

To provide a protected intake for seawater used in cooling systems

Answer

A sea chest is a hull fitting with a strainer that provides a protected seawater intake point for the ship's cooling and other seawater systems.

Question 4

When checking a diesel engine's injection timing, which instrument is typically used?

Accepted Answer

Timing light or dial gauge on the flywheel

Answer

Injection timing on a diesel engine is checked using a timing light or a dial gauge referenced to degree markings on the flywheel.

Question 5

What does the term 'MARPOL' refer to in marine engineering?

Accepted Answer

Marine Pollution Prevention Regulations

Answer

MARPOL stands for the International Convention for the Prevention of Pollution from Ships, governing discharge of oil, sewage, garbage, and other pollutants.

USCG - United States Coast Guard Practice Test

USCG - United States Coast Guard Practice Test

USCG General Engineering 2