Flywheel Section Auxiliary Machinery Compilation PDF

Question 1\. It is used to expel hot, humid, or polluted air from the ship\'s interior, including engine rooms and other enclosed spaces, preventing the accumulation of hazardous gases or fumes. A. VENTILATOR B.EXHAUST VENTS C.FANS D.DUCTS ANS. B 2.\_\_\_\_on a ship are essential for moving air...

Question 1\. It is used to expel hot, humid, or polluted air from the ship\'s interior, including engine rooms and other enclosed spaces, preventing the accumulation of hazardous gases or fumes. A. VENTILATOR B.EXHAUST VENTS C.FANS D.DUCTS ANS. B 2.\_\_\_\_on a ship are essential for moving air throughout the interior spaces,including cabins, lounges, engine rooms,and storage areas. A. FANS B. EXHAUST VENTS C.DUCTS D.VENTILATOR ANS. 3.On a ship, \_\_\_\_\_\_\_ are critical for ensuring that there is a constant exchange of air to avoid the buildup of stale air and to maintain the crew\'s comfort. A. VENTILATOR B. FANS C.DUCTS D. FANS ANS. A 4\. The \_\_\_\_\_\_\_ of ships is crucial for maintaining air quality, ensuring the safety and comfort of the crew,passengers, and cargo, and supporting the operation of various onboard systems. A. REFRIGERATION SYSTEM B. ELECTRICAL SYSTEM C. VENTILATION SYSTEM ANS. C 5-6. What are two main types of ventilation systems used on ships. ANS.NATURAL AND MECHANICAL VENTILATION 7.Used to process and condition the air before it is circulated into the living and working spaces on a ship. A. AIR HANDLING UNIT B. FANS C.DUCTS D. VENTILATION ANS. A 8-12.GIVE THE KEY COMPONENTS OF SHIP VENTILATION SYSTEMS. ANS. Ventilators/Exhaust Vents Fans Ducts and Vents Air Handling Units (AHUs) Louvered Openings. 13.Commonly used on ships in ventilation systems. A. VENTILATOR B.EXHAUST VENTS C.FANS D.LOUVERED OPENING ANS. D. 14.It relies on natural air movement, created by wind, temperature differences, or the ship\'s motion. ANS. NATURAL VENTILATION 15\. It uses mechanical fans or blowers to move air into or out of enclosed spaces. ANS. MECHANICAL VENTILATION REFRIGERATION SYSTEM 1\. What is the primary purpose of a refrigeration system? a\) To generate heat b\) To remove heat c\) To control humidity d\) To purify air Answer: b) To remove heat 2\. Which principle does a refrigeration system operate on? a\) Conduction b\) Convection c\) Radiation d\) Heat transfer Answer: d) Heat transfer 3\. What component compresses refrigerant in a vapor-compression cycle? a\) Condenser b\) Evaporator c\) Compressor d\) Expansion valve Answer: c) Compressor 4\. Which component expands refrigerant, reducing pressure? a\) Expansion valve b\) Capillary tube c\) Orifice d\) All of the above Answer: d) All of the above 5\. What type of refrigerant is R-410A? a\) Chlorofluorocarbon (CFC) b\) Hydrochlorofluorocarbon (HCFC) c\) Hydrofluorocarbon (HFC) d\) Hydrocarbon Answer: c) Hydrofluorocarbon (HFC) 6\. Which refrigerant has zero ozone depletion potential? a\) R-22 b\) R-410A c\) R-134a d\) All of the above Answer: d) All of the above 7\. What cycle type uses compression, condensation, expansion, and evaporation? a\) Vapor-compression cycle b\) Absorption cycle c\) Evaporative cooling cycle d\) Desiccant cooling cycle Answer: a) Vapor-compression cycle 8\. Which cycle type uses heat energy to drive refrigeration? a\) Vapor-compression cycle b\) Absorption cycle c\) Evaporative cooling cycle d\) Desiccant cooling cycle Answer: b) Absorption cycle 9\. What is the primary application of refrigeration systems in buildings? a\) Air conditioning b\) Refrigeration c\) Heating d\) Ventilation Answer: a) Air conditioning 10\. Which industry relies heavily on refrigeration systems? a\) Food processing b\) Chemical processing c\) Pharmaceutical d\) All of the above Answer: d) All of the above 11\. What safety device protects against excessive pressure? a\) Pressure relief valve b\) Safety valve c\) Relief valve d\) All of the above Answer: d) All of the above 12\. Which factor affects refrigeration system efficiency? a\) Compressor size b\) Condenser size c\) Evaporator size d\) All of the above Answer: d) All of the above 13\. What symptom indicates low refrigerant charge? a\) High pressure b\) Low pressure c\) Temperature fluctuations d\) Compressor failure Answer: b) Low pressure 14\. Which issue causes refrigerant leakage? a\) Worn seals b\) Loose connections c\) Corrosion d\) All of the above Answer: d) All of the above 15\. Which regulation phased out CFCs? a\) Montreal Protocol b\) Kyoto Protocol c\) Paris Agreement d\) None of the above Answer: a) Montreal Protocol Heat exchanger (group 1) 1\. What is the main purpose of a heat exchanger on a ship? a\) To increase the temperature of the engine oil. b\) To transfer heat between two fluids. c\) To generate electricity. d\) To filter seawater. 2\. Which type of heat exchanger is known for its compact design and high efficiency? a\) Shell and tube b\) Plate c\) Air-cooled d\) Spiral 3\. What is a common problem that can reduce the efficiency of a heat exchanger? a\) Corrosion b\) Fouling c\) Leaks d\) All of the above 4\. What material is often used in the construction of ship heat exchangers due to its corrosion resistance? a\) Mild steel b\) Copper-nickel alloys c\) Aluminum d\) Cast iron 5\. In a shell and tube heat exchanger, which fluid typically flows through the tubes? a\) The fluid needing cooling b\) The fluid needing heating c\) It depends on the application d\) Seawater only 6\. What is the role of a lube oil cooler on a ship? a\) To cool the engine\'s jacket water b\) To cool the lubricating oil c\) To heat the fuel oil d\) To cool the exhaust gases 7\. What is a potential consequence of a system malfunctioning heat exchanger? a\) Engine overheating b\) Reduced efficiency c\) Increased fuel consumption d\) All of the above 8\. Which type of heat exchanger is often used for cooling smaller systems or components on a ship? a\) Shell and tube b\) Plate c\) Air-cooled d\) Brazed plate 9\. Regular maintenance of a heat exchanger includes: a\) Cleaning b\) Inspection c\) Leak testing d\) All of the above 10\. What is the purpose of a freshwater generator on a ship? a\) To produce fresh water for drinking b\) To produce fresh water for cooling systems c\) To produce fresh water for boiler feed d\) All of the above Answers: b\) To transfer heat between two fluids. b\) Plate d\) All of the above b\) Copper-nickel alloys c\) It depends on the application b\) To cool the lubricating oil d\) All of the above c\) Air-cooled d\) All of the above d\) All of the above