CA

Question 1

A1: What is function of the pressure reduction system in the compressor system?

Answer 1

To reduce pressure through various manifolds for various equipment usage

Question 2

A2: function of thermal expansion valve

Answer 2

Controls the amount of refrigerant released into the evaporator

Question 3

A3: which of the following compartments is likely equipped with the water sprinkler system?

Answer 3

Magazines, Ready-Service Rooms and Ammunition Handling areas

Question 4

A4: define purpose of the CO2 protection system and where fires are put out

Answer 4

Extinguishes the fire by eliminating the oxygen, Used to put out fire in the generator modules and electronic equipment rooms

Question 5

A5: it is mandatory to wear the safety harness when working at what height?

Answer 5

2m

Question 6

A6: what tools are not allowed to be used on the ship?

Answer 6

pneumatic tools

Question 7

A9: whats the purpose of the connecting rod?

Answer 7

connects piston to crankshaft, converts linear motion of the piston to rotationary motion of the crankshaft

Question 8

A10: what is the purpose of the cylinder liner?

Answer 8

To cool and reduce friction between the cylinder wall and the piston

Question 9

B1: 4 Functions of the gearbox systems

Answer 9

decrease RPM of engine to propeller
transmits energy from the propeller to the ship
Supply liquid hydraulic pressure for clutch system
to allow the ship to reverse for smaller ship engines

Question 10

B2: 2 Functions of emergency generator

Answer 10

backup generator in case main generator fails
An additional power source for usage concurrent with the main generator

Question 11

B3: 2 types of smoke detectors and 2 types of flame detectors

Answer 11

photoelectric detector, ionization detectors, infrared type, ultraviolet type

Question 12

B5: according heirachy of hazard control what are 4 more effective methods to implement before PPE?

Answer 12

• Eliminate the hazard
• Isolate the hazard
• Administrative controls
• Substitution of the hazard

Question 13

B6: state 4 golden rules prior to activating the fixed fire fighting system

Answer 13

all men accounted for, General Pipes made on affected compartment prior to activation, ensure all lightweight doors, hatches and doors are closed, know the abort procedures

Question 14

B7: state all parts of the micrometer (8 total

Answer 14

anvil, spindle, frame, thimble scale, main scale, ratchet stop, sleeve with vernier graduations, lock

Question 15

B8: state the function of the following components in the FW distribution system:
FW pump
UV filter
hot water Calorifier
hydrophore tank

Answer 15

FW pump: pumps water at high pressure to other parts of the ship
UV filter: Destroy bacteria in FW through UV rays
hot water calorifier: heats and provides hot water on ship to be distributed
hydrophore tank: Maintains water pressure of the water

Question 16

B9: Name any 4 main components of the 4 stroke diesel cycle

Answer 16

Fuel Injector
Piston
Air Intake Valve
Exhaust Valve

Question 17

B10: state 4 advantages of chillwater system indirect refrigeration system

Answer 17

• Easy to identify leaks
• Contamination of the chilled water does not affect cooling efficency as compared to freon contamination
• Easier to dispose and replace chilled water
• Indirect cooling achieves more favorable temperature that is more suited for cooling electronics

Question 18

C2: describe the working principle of 4 types of fixed fire extinguishing system

Answer 18

• water sprinkler → releases seawater from top to provide emergency cooling and firefighting capabilities
• galley suppression → Extinguish fire by spraying chemical solution onto tilting shallow fryer, cooker plate and hood extraction, etc.
• CO2 protection system → When released, CO2 level increases rapidly, causing the oxygen level to drop, extinguishing the fire
• FM200 system → a synthetic/chemical fire suppression gas and extinguishes a fire by removing the heat elements from the fire triangle.

Question 19

c3: list the main components of the power generation and distribution system (9 total)

Answer 19

• Main Generators
• Emergency Generators
• Main Switchboard
• Emergency Switchboard
• Busbar
• Transformers
• Circuit Breakers
• Rotary Frequency Converters
• Distribution Board Panel

Question 20

c4: list 4 energy hazards that can be present on board ship, one example of each hazard stated

Answer 20

Kinetic Energy - Fan Blower
Electrical Energy - Batteries
Chemical Energy - Gas leaks
Radiation Energy - Ship Radar

Question 21

c5: state 2 functions of oil separator and thermal expansion valve in the refrigeration circuit.

Answer 21

oil separator - separates oil from refrigerant, recycles the oil
thermal expansion valve - create pressure differential in Freon, Control the flow of Freon