Technical

Question 1

What is Marine Engineering?

Answer 1

The Bachelor of Science in Marine Engineering is a 4 year degree program that centers on the construction, operation, and maintenance of different kinds of marine vessels such as cargo ships, cruise ships, fishing boats, battleships and submarines.
This program aims to provide students with the knowledge and skills that will enable them to operate and maintain the different machineries installed in marine vessels, including the propulsion plant, adjunct and auxiliary machinery, electrical and refrigeration systems.

Question 2

What are the duties and responsibilities of an engine cadet on board?

Answer 2

Engine cadet is basically a trainee or apprentice and he/she is on board to learn while working and assisting . His daily routines starts with taking various daily logs from the different machines in E/R . Familiarize with the piping system in the engine room, know how to interpret, accept and reset alarms no trace and interpret line diagrams, Learn procedures for starting and stopping types of machinery, identify machinery switches on the main and emergency switchboards.

Question 3

Differentiate Diesel and Gas engine.

Answer 3

They are both internal combustion engines designed to convert the chemical energy into mechanical energy

The primary difference between diesel and gas engines is the point of fuel ignition. Fuel and air are compressed in gasoline engines which then ignites the compressed substance with a spark plug. The diesel engine ignites from the fact that the compression heats the fuel to the point of ignition. thus, the diesel engine is a so-called compression-ignition engine (CI engine).

Question 4

What is Four Stroke Diesel Engine?

Answer 4

Is a type of ICE that utilizes four distinct piston strokes to complete one operating cycle. The piston makes to complete revolution to complete one operating cycle

Question 5

What is Two Stroke Diesel Engine?

Answer 5

Is a type of ICE that completes power cycle with two strokes of the piston during one power cycle. The piston makes one complete revolution to complete one operating cycle.

Question 6

What is the difference of Four Stroke from a Two Stroke and vice versa?

Answer 6

4 stroke- 4 distinct piston strokes 2 revolution
2 stroke- 2 distinct piston strokes 1 revolution

4 stroke- high speed, low power, usually used in generators
2 stroke- high power, low speed, usually used in main engine

Question 7

5 SYSTEM OF DIESEL ENGINE

Answer 7

• Cooling System(Freshwater & SeaWater)
• Fuel Oil System
• Lube Oil System
• Starting Air System
• Electrical System

Question 8

Pipe Color Coding

Answer 8

• Red -Fuel oil
• Yellow – Lube Oil
• Orange
• Blue -Fresh Water
• Green -Seawater
• White -Air system
• Black -Bilge Water
• Silver -Steam

Question 9

The 4 Main Refrigeration Cycle Components

Answer 9

• The compressor.
• The condenser.
• The expansion device.
• The evaporator.

Question 10

What is the difference between a purifier and clarifier?

Answer 10

Purifier- (LLS Liquid Liquid Sediment) two liquids of different densities are separated using a centrifuge
it uses to separate solid impurities and water from oil

Clarifier - (LS Liquid Sediment) when the same centrifuge is used to separate solid impurities from the fuel.

The key difference between purifier and clarifier is that the purifier consists of a dam ring to create a line of separation between fuel and water whereas the clarifier consists of a sealing ring to prevent the fuel tank from water and dissolved impurities.

Question 11

What is a Piston

Answer 11

a moving component that is inside the cylinder. It converts the force of expanding gases during combustion process to mechanical energy via a piston rod or connecting rod.

Question 12

What is Crankshaft?

Answer 12

Crankshaft - is a key component of an engine, typically the backbone of an engine. Transmitting cylinder power to the propeller shaft. Converting a linear motion to a rotational motion.

Question 13

What is Camshaft ?

Answer 13

It is a control device which operates the three main valves (Inlet, Exhaust and Fuel injector). It operates these valves with the help of cam follower, rocker arm and push rod.

Question 14

What is Cylinder Liner?

Answer 14

is to provide durable and heat resistant combustion chamber. It also provide area for cooling, lubrication, scavenging and assist in sealing the combustion chamber.

Question 15

What is Connecting Rod

Answer 15

does the function of transforming the reciprocating motion of a piston into rotary motion of crankshaft.

Question 16

What is Inlet and Exhaust Valves

Answer 16

in a four stroke marine diesel engine is to inject a charge of fresh air in the combustion space; while the work of exhaust valves all marine engines is to eject out all the byproduct of the combustion.

Question 17

What is Turbocharger?

Answer 17

is to increase the overall power and efficiency of an engine. It has two main parts: A blower and a turbine. Turbine rotates with the shaft by the kinetic energy of flue gas produced by nozzle rings. On other hand a blower rotates by the rotating shaft which in turn produce air suction and then compression to desired pressure.

Question 18

What is series and parallel circuit?

Answer 18

A series circuit has only one path for the charges to move along. A parallel circuit have multiple paths to move along.

Question 19

What the difference between a direct current and alternating current?

Answer 19

DC is defined as the “unidirectional” flow of current; current only flows in one direction.
Alternating current describes the flow of charge that changes direction periodically.

Question 20

What is a boiler?

Answer 20

Boiler is a pressure vessel used on ships in which the water is heated to evaporate and generate the steam and the unit is so arranged that the generated steam accumulated in it

Question 21

What are the two types of boiler?

Answer 21

The two main types are water tube and fire tube.
A watertube boiler has pipes (tubes) filled with water which are surrounded and heated by hot gases, whereas a firetube boiler’s pipes (tubes) are filled with fire and heat the water that surrounds them.

Question 22

What are the two types of piston?

Answer 22

Crosshead ang Trunk type.

Question 23

Farenheit to Celcius?

Answer 23

C = (F-32) x 5/9

Question 24

Celcius to Farenheit

Answer 24

F = (C x 9/5) + 32

Question 25

Classes of Fire

Answer 25

Classes of Fire
A Solid Materials
B flammable liquids
C Flammable Gases
D Fire on metal
E Electrical fire
F Fire on Galley

Question 26

Fire Extinguisher and their use

Answer 26

A (Wood/Paper) - Water
B (Flammable Liquid) - Foam
C (Electric fire) - CO2
D (Metal) - Special Powder

Question 27

What is the difference between Voltage, Amperage, and Watts?

Answer 27

Voltage = The measure of compatibility, how hard it pushes the electricity into a certain device.
Amps = amount of electricity that is being pushed. You can cut down the size of the wire if you have higher voltage outlet.
Watts = V x A. How much power do we need to power 900W? 4 amp x 220 V = 880 W