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In a motor vessel, the air quantity which the engine room need is_______ of the requirements of the engines.
A.less than 25-50%
B.more than 125-150%
C.more than 25-50%
D.less than 125-150%
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更多 “ In a motor vessel, the air quantity which the engine room need is_______ of the requirements of the engines.A.less than 25-50%B.more than 125-150%C.more than 25-50%D.less than 125-150% ” 相关考题
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Which of the units listed is used to combust waste in the engine room?A.BoilerB.IncineratorC.Generator
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题干材料：Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be impracticable to maintain ambient conditions within the comfort zone by air conditioning or any other means. The normal practice is to provide copious mechanical ventilation; in boiler rooms, the quantity is equated to the combustion requirements, while in a motor ship engine room the supply may be 25-50% in excess of the requirements of the engines.The axial flow fan is particularly suited to handle these large air volumes at the moderate pressures required, while of course the “straight-through” flow feature places it at an advantage over the centrifugal fan.The increasing adoption of automation, with the provision of a separate control room makes less significant the fact that comfort conditions cannot be maintained in the engine room all the time.问题：Which of the following devices should be taken to maintain ambient conditions of the boiler and machinery space?A.air compressorB.air coolerC.air-conditioning plantD.mechanical ventilation plantIn a motor vessel, the air quantity which the engine room need is_______ of the requirements of the engines.A.less than 25-50%B.more than 125-150%C.more than 25-50%D.less than 125-150%According to this passage, which of the following statements is true?A.In boiler and machinery spaces, there is the air conditioningB.In the boiler rooms the requirement of air volume should meet 25-50% of combustion requirementC.To maintain the comfort zone in the separate control room the air conditioning plant should be fittedD.The comfort conditions can be maintained in the engine room all the timeAt the middle pressure and large air quantity,_________ is more suitable.A.an axial flow fanB.a radial flow blowerC.a centrifugal fanD.an auxiliary blower请帮忙给出每个问题的正确答案和分析，谢谢！
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Which of the listed classes of fire would most likely occur in the engine room of a vessel?A.Classes A and BB.Classes B and CC.Classes C and DD.Classes A and D
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Fires of which class would most likely occur in the engine room of a vessel ________．A.Classes A and BB.Classes B and CC.Classes C and DD.Classes A and D
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Your vessel has a gasoline engine and a mechanical exhaust ventilation system．BEFORE starting the engine，the exhaust blower should be run long enough to ______．A.warm up the exhaust blower motorB.provide a proper supply of fresh air for the engine（s）C.see the system is in good operating conditionD.insure at least one complete change of air in the compartments concerned
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According to this passage, which of the following statements is true?A.In boiler and machinery spaces, there is the air conditioning.B.In the boiler rooms the requirement of air volume should meet 25-50% of combustion requirement.C.To maintain the comfort zone in the separate control room the air conditioning plant should be fitted.D.The comfort conditions can be maintained in the engine room all the time.
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Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be impracticable to maintain ambient conditions within the comfort zone by air conditioning or any other means. The normal practice is to provide copious mechanical ventilation; in boiler rooms, the quantity is equated to the combustion requirements, while in a motor ship engine room the supply may be 25-50% in excess of the requirements of the engines.The axial flow fan is particularly suited to handle these large air volumes at the moderate pressures required, while of course the “straight-through” flow feature places it at an advantage over the centrifugal fan.The increasing adoption of automation, with the provision of a separate control room makes less significant the fact that comfort conditions cannot be maintained in the engine room all the time. Which of the following devices should be taken to maintain ambient conditions of the boiler and machinery space?A.air compressorB.air coolerC.air-conditioning plantD.mechanical ventilation plant
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船舶的主体是船壳。（）A、The main body of a vessel is the hull.B、The main body of a vessel is the superstructure.C、The main body of a vessel is the engine room.D、The main body of a vessel is the poop.
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单选题船舶的主体是船壳。（）A
The main body of a vessel is the hull.B
The main body of a vessel is the superstructure.C
The main body of a vessel is the engine room.D
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单选题Which of the following is the stated proper sequence before commencing cargo operations aboard Ro-Ro vessels?（）A
Start ventilation，lower the ramp，notify engine roomB
Lower the ramp，start ventilation，notify engine roomC
Notify engine room，lower the ramp，start ventilationD
Start ventilation，notify engine room，lower the ramp
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单选题Your vessel has a midships engine room and the cargo is concentrated in the end holds．The vessel is（）.A
sagging with tensile stress on main deckB
sagging with compressive stress on main deckC
hogging with tensile stress on main deckD
hogging with compressive stress on main deck
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单选题Your vessel is equipped with totally enclosed lifeboats. Which statement is true when the boat is enveloped in flames?（）.A
The ventilators will automatically close by the action of fusible linksB
The motor takes its air supply from outside the lifeboat to prevent asphyxiation of the crewC
A water spray system to cool the outside of the boat is operated by a high-volume manual pumpD
An air tank will provide about ten minutes of air for the survivors and the engine
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单选题The diesel engine consumes considerably less fuel than the steam engine for equal output, （） enables a motor-ship to load more cargo.A
whyB
whichC
in whichD
on which
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单选题Which of the following is operated from the main engine room console on an automated vessel?（）A
Fire pump and lube oil pumpB
Lube oil pump and distilling plantC
Distilling plant and shaft alley doorD
Shaft alley door and fixed CO2 release
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单选题Which of the following is NOT the advantages of the remote control and automation of engine operations?（）A
Routine supervisory labor particularly the unproductive night-service labor is reducedB
Engine mal-operation is automatically sensed and mannedC
The engine room need be manned at night in bad weather or close watersD
Some remedial measures can be taken automatically
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单选题Which of the listed classes of fire would most likely occur in the engine room of a vessel?（）A
Classes A and BB
Classes B and CC
Classes C and DD
Classes A and D
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单选题Your vessel is equipped with a fixed C02 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）.A
Use the C02 system and evacuate the engine roomB
Use the fire main system and evacuate the engine roomC
Evacuate the engine room and use the C02 systemD
Evacuate the engine room and use the fire main system
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单选题Your ship is steaming at night with the gyropilot engaged. You notice that the vessel’s course is slowly changing to the right. Which action should you take FIRST?（）.A
Notify the engine room of the steering malfunctionB
Change to hand steeringC
Call the MasterD
Send the Quartermaster to the emergency steering station
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单选题If an air compressor is used to supply compressed air to outlets throughout the engine room and on deck of a vessel, the system is known as the （）.A
combustion control air systemB
supply air systemC
ships service air systemD
low pressure deck air system
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单选题Which of the following methods is normally used to control the temperature of air distributed from individual cooling coils in an air conditioning system using a chilled water circulation system?（）A
A room thermostat activates an electric heater at each individual chilled air outlet when necessaryB
Varying the number of passes the air makes across the coilsC
Varying the temperature of the water through the coilsD
Varying the quantity of water flowing through the coils
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单选题Which statement is TRUE concerning gasoline vapors on board a vessel（）.A
They are heavier than air and will settle in the lowest part of the vesselB
They are lighter than air and will settle in the highest part of the vesselC
They should be vented into the engine to improve combustionD
They should be vented into the wheelhouse
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单选题According to the ship emergency plan, when average accident happened and the captain made the decision to withdraw from the engine room before leaving the engine room, the wrong operation is that （）A
the chief engineer leaves the engineer room with the engine room log book at firstB
releasing compressed air in the air receiver and closing the watertight doorC
stopping all the running machineries and electric devicesD
closing the quick-closing valves of all the oil tanks, stopping the boiler and releasing gas
考题
单选题The air distributor is conventionally driven by（） and distributes into each cylinder by（） certain sequence.A
camshaft；fresh airB
camshaft；starting airC
electronic motor which is controlled by a computer；fresh airD
electronic motor which is controlled by a computer；starting air
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单选题The air required for combustion is taken from the engine room through a filter fitted on the turbochargerThis reduces the risk for too and contamination of the combustion air（）A
high temperaturesB
low temperaturesC
wetD
dirty
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单选题Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?（）A
Injection pressuresB
Control air supply pressureC
Cooling water flow through after-coolersD
Lube oil temperature
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单选题Which of the listed failures, occurring in an automated diesel generator system, should cause an audible alarm at the engine room control station?（）A
Low cooling water outlet temperatureB
High lube oil pressureC
Low lube oil temperatureD
Low starting air pressure
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